C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
C08K 5/00 (2006.01) C08J 9/00 (2006.01) C08K 5/134 (2006.01) C08K 5/18 (2006.01) C08L 75/04 (2006.01)
Patent
CA 2083003
Polyether polyols and polyurethane foams are stabilized by including therein a stabilizer composition of (a) tetrakis[methylene- (3,5-di-tert-butyl-4-hydroxyhydrocinnamate)]methane and (b) a reaction product of diphenylamine and diisobutylene wherein the molar ratio of the amine to the diisobutylene is 1:1.1 to 1:2.5. The stabilizer composition may contain a third synergistic component, phenothiazine or certain alkyl derivatives of phenothiazine. The stabilizer composition may further contain trihydrocarbyl phosphite to stabilize the color of same.
Des mousses de polyéthers polyols et de polyuréthanes sont stabilisées en y incorporant une composition stabilisatrice de (a) tétrakis[méthylène-(3,5-di-tert-butyl-4- hydroxyhydrocinnamate)]méthane et (b) d'un produit de réaction de diphénylamine et de diisobutylène; le rapport molaire de l'amine au diisobutylène est de 1:1,1 à 1:2,5. La composition stabilisatrice peut renfermer un troisième constituant synergiste, la phénothiazine ou certains dérivés alkyliques de la phénothiazine. La composition peut aussi renfermer un phosphite trihydrocarbylique pour stabiliser la couleur de ces produits.
R. T. Vanderbilt Company Inc.
Smart & Biggar
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