Flame retardants are often extremely harmful to health.
Despite this, they are found in many types of synthetic materials which would otherwise ignite quickly. Empa researchers have now succeeded in producing non-harmful flame retardants.
Synthetic materials made from organic polymers usually burn very well due to their high carbon content; when turned into foams, they ignite even more easily – and, depending on their chemical compositions, they produce toxic gases such as hydrogen cyanide or carbon monoxide. For this reason, polyurethane foams and other similar products have to be treated with flame retardants. These foam materials are widely used in upholstered furniture and mattresses, as insulation and packaging materials and as expanding spray foams.
Conventional halogenated flame retardants such as tri(chloropropyl) phosphate (TCPP) or some polybrominated diphenyl ethers (PBDE) are suspected of being harmful to health and the environment: a number of these substances are extremely persistent and accumulate in the environment, have hormone-like effects and are even thought to be carcinogenic. Non-harmful replacements are therefore called for. These are exactly what Empa researchers have developed in conjunction with Swiss company FoamPartner within the scope of a project sponsored by the Commission for Technology and Innovation (CTI).
Healthier, more environmentally friendly and with no additional cost
The novel flame retardants are organic phosphorus-containing compounds, so-called phosphoramidates. The Empa researchers synthesised several of these substances (which differ from each other in terms of the type of amine substituents attached to the phosphorus) and added them to the polyurethane foam in increasing concentrations. First results indicate that the flame retardants did not have a negative effect on the foam manufacturing process. As a result, conventional agents that are harmful to health may soon be a thing of the past.
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The Latest Google Headlines on:
Non-toxic flame retardants
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The Latest Bing News on:
Non-harmful flame retardants
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