Internal mold release compositions

Details Internal mold release compositions Internal mold release compositions

C - Chemistry, Metallurgy

08

J

C08J 9/00 (2006.01) B29C 33/64 (2006.01) C08G 18/36 (2006.01) C08G 18/61 (2006.01) C08G 18/66 (2006.01)

Patent

CA 2364578

Internal mold release systems which include an internal mold release agent that includes any one of fatty acids, fatty acid esters and metal carboxylates, and employ a poly(dimethylsiloxane) surfactant of Formula (I): where R is H, C1 to C20 alkyl, or C6 to C25 aryl; x is about 1 to about 24; y is 0 to about 10; m is about 1 to about 25; n is about 0 to about 100 are disclosed. Isocyanate compositions, isocyanate reactive compositions and polyurethane reaction systems which employ the surfactant also are disclosed.

L'invention porte sur des systèmes internes de démoulage qui comprennent un agent interne de démoulage constitué d'un acide gras quelconque, d'esters d'acide gras et de carboxylates métalliques. Ces systèmes utilisent un tensioactif de poly(diméthylsiloxane) de la formule (I) dans laquelle R représente H, alkyle C¿1? à C¿20? ou alkyle C¿6? à C¿25 ?; x vaut environ 1 à environ 24 ; y vaut 0 à environ 10 ; m vaut environ 1 à environ 25 ; n vaut environ 0 à environ 100. L'invention porte également sur des compositions d'isocyanate, des compositions réactives d'isocyanate et sur des systèmes réactionnels de polyuréthane utilisant également le tensioactif précité.

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