More efficient FR agents for flexible PUR foam.Two new flame retardants Flame retardants are materials that inhibit or resist the spread of fire. Naturally occurring substances such as asbestos as well as synthetic materials, usually halocarbons such as polybrominated diphenyl ether (PBDEs), polychlorinated biphenyls (PCBs) and chlorendic acid for flexible urethane urethane (yoor´ithān´), n ethyl carbamate used as an anesthetic agent for laboratory animals, formerly used as a hypnotic in humans. foam are said to be significantly more efficient than their predecessors. Firemaster 600 and 602 from Chemtura Corp., Middlebury, Conn., are phosphorus-bromine diphenyl diphenyl /di·phen·yl/ (di-fen´il) a toxic compound comprising two linked benzene rings, used as a fungistat in containers for shipping citrus fruits. di·phen·yl n. See biphenyl. ethers (BDEs), like the older Firemaster 550 and 552. However, the new grades are said to permit about 10% lower use levels and to exhibit outstanding scorch resistance, minimal effect on foam processing or physical properties, as well as a favorable fa·vor·a·ble adj. 1. Advantageous; helpful: favorable winds. 2. Encouraging; propitious: a favorable diagnosis. 3. environmental profile. Grade 602 is specifically recommended for mechanically cooled foams. Tel: (800) 295-2392 * PTDirect: 295QX [ILLUSTRATION OMITTED] |
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