{"id":119004,"date":"2020-09-16T13:27:42","date_gmt":"2020-09-16T11:27:42","guid":{"rendered":"https:\/\/concentrol.com\/hybrid-mould-release-agents-for-polyurethane-foam-innovation-state-of-the-art-application-and-their-impact-on-the-environment\/"},"modified":"2025-07-23T14:56:17","modified_gmt":"2025-07-23T12:56:17","slug":"hybrid-mold-release-agents-for-polyurethane-foam-innovation-state-of-the-art-application-and-their-impact-on-the-environment","status":"publish","type":"post","link":"https:\/\/hosting175685eu-cp704.wordpresstemporal.com\/fr\/hybrid-mold-release-agents-for-polyurethane-foam-innovation-state-of-the-art-application-and-their-impact-on-the-environment\/","title":{"rendered":"Hybrid mold release agents for polyurethane foam: innovation, state of the art, application and their impact on the environment"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row][vc_column][vc_column_text]<span style=\"color: #000000;\">[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<span style=\"font-weight: 400;\">At <\/span><b>Concentrol<\/b><span style=\"font-weight: 400;\"> we are clear that research and development are the basis for devising and creating new solutions. This occurs by taking into account the needs of <\/span><b>society and the environment<\/b><span style=\"font-weight: 400;\">. Thus, we work to carry out our activity with the utmost respect for nature and looking for sustainable alternatives.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><b>Mold release agents<\/b><span style=\"font-weight: 400;\"> play a key role in the production of molded polyurethane. They have a decisive influence on the appearance of the molded parts, as well as on the production process, taking into account profitability in repairs or defects in the manufacturing process.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">However, more and more importance is given to the environmental factor and the health of workers. For this reason, <\/span><b>hybrid mold release agents<\/b><span style=\"font-weight: 400;\"> must be taken into account: they represent a clear advantage with respect to volatile emissions into the atmosphere and risks for workers who apply the product on a daily basis.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">This article describes one more step towards what is known as hybrid release agents. These are products that incorporate <\/span><b>water<\/b><span style=\"font-weight: 400;\"> and <\/span><b>half the solvent<\/b><span style=\"font-weight: 400;\"> as a means of carrying the active ingredients, with a reduction of the solvent to a total of 30% in the formula, with the water content being the predominant one, with the advantages that this entails.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">Hybrid release agents represent <\/span><b>improvements<\/b><span style=\"font-weight: 400;\"> in the following terms:<\/span><\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400; color: #000000;\">Lower amount of VOCs emitted into the atmosphere.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400; color: #000000;\">Lower flammability, with all that this entails regarding regulation (ATEX), the danger according to the flash point and aspects related to transport of goods and storage.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400; color: #000000;\">Less harmful or lower toxicity of the health indicators of the solvents involved in the formulation of release agents.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400; color: #000000;\">Lower end impact on the environment.<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><span style=\"color: #000000;\"><b>30% Hybrid mold release agents<\/b><\/span><\/p>\n<p><span style=\"color: #000000;\"><b>Physico-chemical characterization<\/b><\/span><\/p>\n<p><span style=\"color: #000000;\"><b>30% hybrid release agents<\/b><span style=\"font-weight: 400;\">, unlike water-based release agents, are not a simple emulsion, understood in thermodynamic terms as an unstable system that has required an external action (agitation) combined with an internal stabilizing action of a surfactant system to lower interfacial tension.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">Rather, they are a <\/span><b>combination of two systems<\/b><span style=\"font-weight: 400;\"> (the solvent with the active ingredients and water) bound together by compatible emulsifying agents. This results in a unique and stable product, not miscible either in water or in solvent, with a viscosity always lower than 40\u201d measured in Ford Cup No. 4.<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Thus, its correct application is guaranteed by means of aerographic or air-mix equipment commonly used in polyurethane production lines.<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Structure:<\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">A) Carrier: <\/span><b>Water <\/b><span style=\"font-weight: 400;\">+ <\/span><b>30% solvents.<\/b>\u00a0<\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">B) Active ingredients: <\/span><b>hydrocarbon waxes<\/b><span style=\"font-weight: 400;\"> together with a series of <\/span><b>additives<\/b><span style=\"font-weight: 400;\">. Content 4 to 8%.<\/span>\u00a0<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400; color: #000000;\">The waxes must have suitable melting \/ solidification temperatures for the release process in which the mold release agent takes part.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400; color: #000000;\">The additives used must have good solubility and \/ or dispersibility in solvent media. Otherwise, they must be incorporated into the formulation previously emulsified with an emulsifier system similar and ionically compatible with that of the release agent. Also, it is convenient to prioritize the use of those with greater stability to hydrolysis, as they are mainly incorporated in an aqueous medium.<\/span><\/li>\n<\/ol>\n<p><span style=\"color: #000000;\">C) <b>Emulsifiers:<\/b><span style=\"font-weight: 400;\"> They can be of several types: <\/span><b>cationic, anionic<\/b><span style=\"font-weight: 400;\"> and <\/span><b>non-ionic<\/b><span style=\"font-weight: 400;\">. The choice will depend on the ionic character to be given to the final product, as well as the compatibility among the ingredients within the system.<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">As mentioned above, once the final emulsion has been formed, it can no longer be diluted with either water or solvent, since a stable closed system is formed.<\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">The <\/span><b>advantages<\/b><span style=\"font-weight: 400;\"> provided by the solvents used in this type of formulations are that they contain less than 20 ppm of aromatic compounds, absence of benzene, practically absence of odour, low surface tension and low electrical conductivity.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">The <\/span><b>manufacturing process<\/b><span style=\"font-weight: 400;\"> of these 30% hybrid mold release agents must be carried out with equipment and facilities that allow obtaining an emulsion with a suitable particle size, also using specific dispersion and refining systems.<\/span><\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"color: #000000;\"><b>Applicability to production lines<\/b><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">In a production line of <\/span><b>molded polyurethane<\/b><span style=\"font-weight: 400;\">, in which a solvent-based release agent is being used, the adaptation to start working with a 30% hybrid release agent is minimal. Basically, just the drying time has to be taken into account, as it will be somewhat longer than usual, which can be compensated with an increase in the spray air of the application equipment.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">It is recommended not to use air-less equipment, but rather <\/span><b>airbrush or air-mix <\/b><span style=\"font-weight: 400;\">with a nozzle of between 0.3 mm and 0.5 mm, depending on the size and type of part to be released, and an air pressure of 2 to 4 bars.<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">In circular carousels it is also recommended to place the point of application of the release agent as far as possible from the point of injection of the polyurethane. Thus, the drying time is extended, avoiding traces of water left, which may interfere with production.<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Regarding the flow rate of the applied product, it will be similar to that used when working with a semi-concentrated standard solvent-based release agent.<\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">Also, using fittings and pipes for the circulation of the product, mold holders and tools that are made of <\/span><b>stainless steel<\/b><span style=\"font-weight: 400;\"> should be considered, to avoid risks of oxidation due to the presence of water in the hybrid release agent.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><b>RELEASE AGENTS AND THEIR RELATIONSHIP WITH VOCs<\/b><\/span><\/p>\n<p><span style=\"color: #000000;\"><b>Volatile Organic Compounds (VOCs)<\/b><span style=\"font-weight: 400;\"> are organic chemicals that have high vapour pressure at room temperature. This vapour pressure is related to the boiling point. The lower it is, the greater the amount of molecules that evaporate from the liquid form and enter the surrounding air.<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">They are considered one of the most abundant pollutants in the atmosphere, since they are key substances in the formation of ozone in the troposphere, along with nitrogen oxides.<\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">In relation to release agents, there are some VOCs produced during the manufacture of polyurethane (stack emissions and direct emissions) and there are several ways in which these can be reduced by release agents. One of them, discussed in this article, is through <\/span><b>hybrid release agents<\/b><span style=\"font-weight: 400;\">.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">Currently, the solvents used in mold release agents are hydrogenated aliphatic hydrocarbons of different distillation ranges, with different boiling and flash points. This has a direct effect on their <\/span><b>ability to evaporate<\/b><span style=\"font-weight: 400;\"> and, therefore, <\/span><b>to dry<\/b><span style=\"font-weight: 400;\"> on top of the mold.<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">They also have an impact on the performance of the release agent on the surface of the mold, since, as a carrier, it includes the active ingredients that will be ultimately responsible for the good release of the polyurethane part as well as its correct surface finish.<\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">In the case of the <\/span><b>30% hybrid mold release agents<\/b><span style=\"font-weight: 400;\"> that are discussed in this article, specially refined solvents are used, the combination of which implies a flash point &gt; 62 \u00b0C. Together with its percentage within the formulation, it makes the product safe for transport, a clear advantage over solvent-based release agents known as \u201cclass III\u201d.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">To understand the importance of changing the use of a 100% solvent-based release agent to a hybrid one, it is necessary to mention the <\/span><b>EU Solvent Emissions Directive (SED)<\/b><span style=\"font-weight: 400;\">:<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><i><span style=\"font-weight: 400;\">The European Union Solvent Emissions Directive (Council Directive 1999\/13 \/ EC on the limitation of emissions of volatile organic compounds due to the use of organic solvents in certain activities and facilities) establishes emission limit values for 20 different categories of \u00ab\u00a0facilities\u00a0\u00bb using solvents.<\/span><\/i><\/span><\/p>\n<p><span style=\"color: #000000;\"><i><span style=\"font-weight: 400;\">Facilities whose solvent consumption and emissions are at all times below the thresholds established in Annex II A of the DEE only re<\/span><\/i><i><span style=\"font-weight: 400;\">quire the registration of their activities with the competent national authorities. Others must reduce their VOC use or reduce their VOC emissions <\/span><\/i><i><span style=\"font-weight: 400;\">(known as a \u00ab\u00a0cut-off\u00a0\u00bb approach) by keeping the average annual solvent content of their used products below a set percentage ceiling. They must also monitor and report their emissions.<\/span><\/i><\/span><\/p>\n<p><span style=\"color: #000000;\"><b>VOCs reduction in direct application<\/b><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">To completely eliminate direct emission VOCs, the best solution is to switch from a solvent-based release agent to a <\/span><b>water-based<\/b><span style=\"font-weight: 400;\"> one.<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Although this solution is not yet highly integrated in some polyurethane sectors, there is an upward trend to manufacture with water-based release agents, especially if consumption is high and there can be both economic and environmental savings.<\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">Between solvent-based and water-based solutions, there is one more option known as <\/span><b>hybrid mold release agents<\/b><span style=\"font-weight: 400;\">.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">The classic hybrid release agents or <\/span><b>CO-SOLVENT MIX 50:50 release agents<\/b><span style=\"font-weight: 400;\"> are products in which the main material, that is, the carrier for the active ingredients, is approximately <\/span><b>half water-half solvent<\/b><span style=\"font-weight: 400;\">.<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">In terms of functionality and finish of the demolding part, they are like a solvent base, with the main disadvantage that at least half of their formulation does not contain VOCs.<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Even so, it is a good intermediate solution for polyurethane manufacturers that are currently producing their parts, be it car seats, furniture, soundproofing, footwear, steering wheels, and others, with a solvent-based release agent and do not want to take the step to change completely to water-based.<\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">The simple <\/span><b>change from solvent base to hybrid<\/b><span style=\"font-weight: 400;\"> already implies an improvement in certain aspects, such as price reduction, reduction of VOCs emitted into the atmosphere and a better working environment for operators on the production line.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">With these products, a further step has been taken and the amount of solvent has been <\/span><b>lowered to 30%<\/b><span style=\"font-weight: 400;\">, maintaining the nature of the product, that is, its hybrid character without converting it into a water-based co-solvent.<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">This reduction of more percentage of solvent in the hybrid formulation provides the following advantages:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"color: #000000;\"><b>Reduction in the cost <\/b><span style=\"font-weight: 400;\">of the release agent as there is less solvent in the formulation, being replaced by water.<\/span><\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">Toxicity goes from Packing Group III due to ADR to <\/span><b>not presenting ADR<\/b><span style=\"font-weight: 400;\">.<\/span><\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">The <\/span><b>Flash Point <\/b><span style=\"font-weight: 400;\">is increased to &gt; 62\u00baC.<\/span><\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">The emission of VOCs into the atmosphere is <\/span><b>reduced by an extra 20%<\/b><span style=\"font-weight: 400;\">, compared to a classic hybrid release agent.<\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\"><b>Comparative graph between a standard class II release agent, with a 50% standard hybrid and the new 30% hybrid:<\/b><span style=\"font-weight: 400;\">[\/vc_column_text][vc_single_image media=\u00a0\u00bb118944&Prime; media_width_percent=\u00a0\u00bb100&Prime;][vc_column_text]<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><b>Regarding water-based release agents<\/b><span style=\"font-weight: 400;\">, the following advantages remain:<\/span><\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">The surface finish of the released part is as if it were achieved with a standard solvent-based release agent, that is, a <\/span><b>dry and soft touch<\/b><span style=\"font-weight: 400;\"> that allows the surface adhesion of Napa leather.<\/span><\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"color: #000000;\"><b>Closed or open pore <\/b><span style=\"font-weight: 400;\">as appropriate.<\/span><\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"color: #000000;\"><b>More cleanliness<\/b><span style=\"font-weight: 400;\"> of the mold holders and auxiliary equipment, without the greasy residue left by the classic water base.<\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\"><b>Flammability and transportation hazards<\/b><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">During the use of release agents that include some solvent in their formulation, the <\/span><b>ATEX<\/b><span style=\"font-weight: 400;\"> (Explosive atmospheres) regulations must be considered.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">Although in order for a potentially explosive atmosphere to form, the combination of a flammable or combustible substance with an oxidant at a given concentration and an ignition source must occur, the <\/span><b>risk<\/b><span style=\"font-weight: 400;\"> becomes much greater when working with products of high flammability in confined spaces or without a good extraction system.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">To avoid having to install ATEX equipment, the only solution is to use <\/span><b>100% water-based mold release agents<\/b><span style=\"font-weight: 400;\">.<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">It is important to consider that within solvent-based mold release agents there are different degrees of flammability (known in the jargon of the sector as Class I, Class II and Class III). Moreover, in the case of 30% hybrids, a further step towards water base is taken, further reducing flammability.<\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">Where there is a positive impact increasing the \u201cClass\u201d of the solvent used in the release agents is in the European Agreement Concerning the International Carriage of Dangerous Goods By Road also known as <\/span><b>ADR Transport<\/b><span style=\"font-weight: 400;\">.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">In <\/span><b>standard solvent-based release agents<\/b><span style=\"font-weight: 400;\">, going from Class I to Class II, or from Class II to Class III, there is an increase in the <\/span><b>flash point<\/b><span style=\"font-weight: 400;\">, which leads to fewer restrictions on transportation.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">Regarding this point, there is a classification of the risk that each material entails during transportation called <\/span><b>Packing Group<\/b><span style=\"font-weight: 400;\">.<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">High flash point substances generally have lower vapour pressure than highly flammable ones. And vapour pressure is directly related to volatility, which directly affects the Packing Group of the transported products.<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Likewise, this Packing Group also defines the degree of protection that product packaging must have during transport.<\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">According to volatility, substances that contain solvents can be classified into <\/span><b>3 different Packing Groups<\/b><span style=\"font-weight: 400;\"> as shown below:[\/vc_column_text][vc_single_image media=\u00a0\u00bb118949&Prime; media_width_percent=\u00a0\u00bb100&Prime;][vc_column_text]<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">In general, higher Packing Groups mean fewer restrictions and safer transportation.<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">With 30% hybrid release agents, toxicity goes from Group III (slightly toxic) of the 50:50 Hybrids, to No group (non-toxic).<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">In other words, they have the same transport classification as a water-based release agent.<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Below, the attached tables show the differences between a standard class II solvent-based release agent, a 50% hybrid and a 30% hybrid:<\/span><\/p>\n<p><span style=\"color: #000000;\"><b>Transportation safety information table comparing a standard class II solvent-based release agent, a 50% hybrid and a 30% hybrid:<\/b><span style=\"font-weight: 400;\">[\/vc_column_text][vc_single_image media=\u00a0\u00bb118974&Prime; media_width_percent=\u00a0\u00bb100&Prime;][vc_single_image media=\u00a0\u00bb118984&Prime; media_width_percent=\u00a0\u00bb100&Prime;][vc_single_image media=\u00a0\u00bb118994&Prime; media_width_percent=\u00a0\u00bb100&Prime;][vc_column_text]<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><b>Work environment<\/b><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">The use of solvent-based release agents is associated with <\/span><b>vapours breathed<\/b><span style=\"font-weight: 400;\"> by operators and workers who are on the production line, even if there are good extraction systems.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">These vapours can not only be annoying, but also irritate the respiratory tract and, at high concentrations, with deficient extraction systems, cause <\/span><b>drowsiness, headaches, breathing difficulties, dizziness and confusion<\/b><span style=\"font-weight: 400;\">.<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Inhaled vapours can also in the long term have health implications depending on the degree of toxicity of the solvent in question.<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">In turn, the more volatile these solvents, the greater the surface of the work area they can cover, creating fire hazards, especially substances with a lower flash point.<\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">Referring to the health of workers, the importance of a reduction in the <\/span><b>TLV and DNEL<\/b><span style=\"font-weight: 400;\"> indicators comes to the fore.<\/span><\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"color: #000000;\"><b>TLV and DNEL<\/b><\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"color: #000000;\"><b>TLVs<\/b><span style=\"font-weight: 400;\"> refer to concentrations of substances that are suspended in air and represent conditions under which it is believed that almost all workers can be repeatedly exposed day after day without showing adverse health effects. Due to the fact that, in most cases, the release agent is applied by atomization with <\/span><b>spray guns<\/b><span style=\"font-weight: 400;\">, this is an important factor to consider.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">Also, related to the term TLV, there are DNELs. It is the <\/span><b>level of exposure<\/b><span style=\"font-weight: 400;\"> to a substance above which humans should not be exposed, measuring the potential of the substance to cause adverse health effects.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">This potential will vary depending on the <\/span><b>pattern of exposure to the substance<\/b><span style=\"font-weight: 400;\">, defined as a combination of the following elements:<\/span><\/span><\/p>\n<p>&nbsp;<\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400; color: #000000;\">Workers exposed to the product in their working day.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400; color: #000000;\">The frequency and duration of the exposure, e.g. single exposure or continuous exposure for eight hours.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400; color: #000000;\">The route of exposure: skin, inhalation or oral.<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">For each health effect and each relevant exposure pattern, a DNEL must be established.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">In the case of<\/span><b> hybrid mold release agents<\/b><span style=\"font-weight: 400;\">, there is a reduction in the percentage of solvent in their composition that is directly linked to a reduction in TLVs and DNEL by the same percentage, thereby obtaining an improvement in the working environment of the line workers.<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Although this exposure to vapours produced by release agent solvents can be reduced through the use of respiratory protective equipment, this option is becoming less and less preferable and is only acceptable where fume extraction and control systems cannot provide adequate levels of health protection, or also as a secondary line of defence or as a temporary measure while installing such systems.<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Respiratory protection is therefore only commonly used for maintenance work or emergency situations such as spills. It should also be noted that respiratory protective equipment cannot always provide fully effective protection.<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Furthermore, there may be national legal requirements that regulate the use of respiratory protection, such as its limited time of use.<\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">For these reasons, with the use of 30% hybrid release agents, this exposure to solvent vapours is <\/span><b>drastically reduced<\/b><span style=\"font-weight: 400;\">, and through a double effect: firstly, due to the <\/span><b>60% reduction of solvent<\/b><span style=\"font-weight: 400;\"> and, secondly, the remaining solvent becomes less volatile.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><b>Storage<\/b><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">This new range of <\/span><b>hybrid release agents<\/b><span style=\"font-weight: 400;\">, due to its percentage in solvent (30%), has a clear advantage over 100% water-based release agents in countries with cold climates, especially in winter.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">Although the product freezes at temperatures below 0 \u00b0C, the amount of solvent it contains acts as a protector of the emulsifying system, allowing it to warm up at 15 \u00b0C naturally. In this way, all the <\/span><b>properties and physical characteristics<\/b><span style=\"font-weight: 400;\"> that it had before freezing are <\/span><b>recovered<\/b><span style=\"font-weight: 400;\">.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">This does not happen with <\/span><b>water based <\/b><span style=\"font-weight: 400;\">ones, which, in general, are damaged after freezing, and their performance in the production process is lower compared to the release agent before freezing.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">This property establishes a clear advantage for<\/span><b> transportation in cold countries<\/b><span style=\"font-weight: 400;\">, since it can be carried out in the same way as with solvent-based products, without the need to hire warm transport services.<\/span><\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"color: #000000;\"><b>Comparison table of types of release agents:<\/b><\/span><\/p>\n<p>&nbsp;<\/p>\n<table>\n<tbody>\n<tr>\n<td><\/td>\n<td><span style=\"color: #000000;\"><b>Standard solvent-based release agents<\/b><\/span><\/td>\n<td><span style=\"color: #000000;\"><b>Concentrated solvent-based release agents (Classe II and III)<\/b><\/span><\/td>\n<td><span style=\"color: #000000;\"><b>Standard water-based release agents and co-solvents<\/b><\/span><\/td>\n<td><span style=\"color: #000000;\"><b>Standard hybrid release agents<\/b><\/span><\/td>\n<td><span style=\"color: #000000;\"><b>Hybrid release agents 30%<\/b><\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\"><b>Active ingredients<\/b><\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">1 \u2013 4 %<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">6 \u2013 17 %<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">5 \u2013 15 %<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">4 \u2013 8%<\/span><\/td>\n<td><span style=\"color: #000000;\"><b>4 \u2013 8 %<\/b><\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\"><b>Low boiling\u00a0<\/b><\/span><\/p>\n<p><span style=\"color: #000000;\"><b>point solvents\u00a0<\/b><\/span><\/p>\n<p><span style=\"color: #000000;\"><b>40-160\u00b0C<\/b><\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">96 \u2013 99 %<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">&#8211;<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">0 \u2013 20 %<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">&#8211;<\/span><\/td>\n<td><span style=\"color: #000000;\"><b>&#8211;<\/b><\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\"><b>High boiling point solvents 140-200\u00b0C<\/b><\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">&#8211;<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">83 \u2013 94 %<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">0 \u2013 20 %<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">50%<\/span><\/td>\n<td><span style=\"color: #000000;\"><b>30%<\/b><\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\"><b>Average VOCs generated<\/b><\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">95%<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">90%<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">10%<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">50%<\/span><\/td>\n<td><span style=\"color: #000000;\"><b>30%<\/b><\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\"><b>Water<\/b><\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">&#8211;<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">&#8211;<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">80 \u2013 95 %<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">40-45%<\/span><\/td>\n<td><span style=\"color: #000000;\"><b>66 &#8211; 62%<\/b><\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\"><b>Application method<\/b><\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">Air &#8211; less<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">Airbrush<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">Airbrush<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">Airbrush<\/span><\/td>\n<td><span style=\"color: #000000;\"><b>Airbrush<\/b><\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\"><b>Flammability risk<\/b><\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">Very high<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">High<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">Very low &#8211; Nil<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">Low<\/span><\/td>\n<td><span style=\"color: #000000;\"><b>Very low<\/b><\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\"><b>Packing Group<\/b><\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">I<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">II \u00f3 III<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">&#8211;<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">III<\/span><\/td>\n<td><span style=\"color: #000000;\"><b>&#8211;<\/b><\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\"><b>Transportation (ADR Regulation)<\/b><\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">YES<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">YES<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">NO<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000;\">YES<\/span><\/td>\n<td><span style=\"color: #000000;\"><b>NO<\/b><\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">The objective of this article was to present a technology already available on the market, which combines the benefits of <\/span><b>water-based release agents in terms of reducing VOCs and toxicology<\/b><span style=\"font-weight: 400;\">, together with the <\/span><b>good performance and production ease achieved<\/b><span style=\"font-weight: 400;\"> when working with solvent-base release agents, taking a further step in <\/span><b>hybrid technology<\/b><span style=\"font-weight: 400;\">.<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">The commitment to research and development of new solutions is in Concentrol&rsquo;s DNA. We know that it is our mission to develop new technologies that allow us to satisfy the needs of our customers, while taking into account the environment and the health of workers. For this reason, we continue working to devise and produce the best solutions for the whole of society.<\/span>[\/vc_column_text][\/vc_column][\/vc_row][vc_row row_height_percent=\u00a0\u00bb0&Prime; overlay_alpha=\u00a0\u00bb50&Prime; gutter_size=\u00a0\u00bb3&Prime; column_width_percent=\u00a0\u00bb100&Prime; shift_y=\u00a0\u00bb0&Prime; z_index=\u00a0\u00bb0&Prime; shape_dividers=\u00a0\u00bb\u00a0\u00bb][vc_column width=\u00a0\u00bb1\/1&Prime;][vc_button border_width=\u00a0\u00bb0&Prime; link=\u00a0\u00bburl:https%3A%2F%2Fconcentrol.com%2Fwp-content%2Fuploads%2F2020%2F09%2FEN_DSM-hibridos.pdf|||\u00a0\u00bb]Download infographic[\/vc_button][vc_column_text]<div class=\"wp-block-pdfemb-pdf-embedder-viewer\"><a href=\"https:\/\/concentrol.com\/wp-content\/uploads\/2020\/09\/EN_DSM-hibridos.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\" data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">EN_DSM hibridos<\/a><\/div>[\/vc_column_text][\/vc_column][\/vc_row]<\/span><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>[vc_row][vc_column][vc_column_text][\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]At Concentrol we are clear that research and development are the basis for devising and creating new solutions. This occurs [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":118935,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[319],"tags":[320,339,351,346,632,352,340],"class_list":["post-119004","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-performance-materials-en-2-fr","tag-automotive-industry-fr","tag-footwear-industry-fr","tag-furniture-fr","tag-mattresses-fr","tag-mould-fr","tag-panels-fr","tag-systems-fr"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Hybrid mold release agents for polyurethane foam: innovation, state of the art, application and their impact on the environment<\/title>\n<meta name=\"description\" content=\"Concentrol - Chemical Solutions\" \/>\n<meta name=\"robots\" content=\"index, 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