Polyurethane compositions having internal mold release propertie

Details Polyurethane compositions having internal mold release propertie Polyurethane compositions having internal mold release propertie

1995-12-14

1997-12-23

Sergent, Rabon

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

25218214, 2521822, 25218224, 25218225, 25218226, 25218227, 25218228, 264 51, 2643281, 2643286, 2643288, 521110, 521130, 521170, 521173, 521174, 521176, 524775, C08K 512, C08K 504, C08K 554, C08J 908

Patent

active

057008698

ABSTRACT:
The invention provides polyurethane components and compositions capable of providing internal mold release properties in SRIM applications. The polyol composition of the invention has an isocyanate reactive polyol (A) having a number average molecular weight from 100 to about 10,000 and an effective amount of internal mold release composition (B) having a silicon-containing polymer (a) and an at least diester functional compound (b) which is the reaction product of (i) an aromatic carboxylic acid, and (ii) alcohols having from 2 to 30 carbons. The invention further provides an SRIM polyurethane composition useful in the preparation of molded polyurethane articles having internal mold release properties, the composition comprising an isocyanate component (I) and the isocyanate reactive polyol composition (component (II)) disclosed above. In another aspect of the invention, the invention provides methods of using the claimed compositions as well as the rigid cellular polyurethane SRIM articles resulting from such processes.

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