Molded polyurethane SRIM articles
AssigneeBASF SE
InventorJames Turnbach
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Abstract
The invention provides a molded polyurethane article having internal mold release properties. The polyurethane article comprises the reaction product of an isocyanate component (I) and an isocyanate-reactive polyol component (II). The polyol component comprises an isocyanate-reactive polyol (A) having a molecular weight from 100 to about 10,000 and an effective amount of an internal mold release composition (B). The internal mold release composition comprises a silicon-containing polymer (a) and a diester functional compound (b). The diester compound comprises the reaction product of an aromatic dicarboxylic acid (i) and an alcohol having from 2 to 30 carbons.
Claims19
A molded polyurethane article exhibiting improved mold release properties comprising the reaction product of
- I.) an isocyanate component;
- and
- II.) an isocyanate-reactive polyol component comprising:
- A.) an isocyanate-reactive polyol having a molecular weight from 100 to about 10,000;
- and
- B.) an effective amount of an internal mold release composition comprising:
- a.) a silicon-containing polymer, and
- b.) a diester functional compound comprising the reaction product of:
- (i) an aromatic dicarboxylic acid, and
- (ii) an alcohol having from 2 to 30 carbons.
A molded polyurethane article comprising the reaction product of
- I.) an isocyanate component;
- and
- II.) an isocyanate-reactive polyol component comprising:
- A.) an isocyanate-reactive polyol having a molecular weight from 100 to about 10,000;
- and
- B.) an effective amount of an internal mold release composition consisting essentially of:
- a.) a silicon-containing polymer;
- and
- b.) a diester functional compound comprising the reaction product of:
- (i) an aromatic dicarboxylic acid;
- and
- (ii) an aliphatic monofunctional alcohol having from 2 to 30 carbons
- said components reacting in a mold to produce a molded polyurethane article exhibiting internal mold release properties.
A molded polyurethane article comprising the reaction product of
- I.) an isocyanate component;
- and
- II.) an isocyanate-reactive polyol component comprising:
- A.) an isocyanate-reactive polyol having a molecular weight from 100 to about 10,000;
- and
- B.) an effective amount of an internal mold release composition comprising, based on the weight of the internal mold release composition (B):
- a.) from 1 to 50 pbw of a secondary hydroxyl functional polydimethylsiloxane;
- and
- b.) from 50 to 99 of a diester functional compound comprising the reaction product of:
- (i) an aromatic dicarboxylic acid having from 8 to 14 carbons;
- and
- (ii) an alcohol having from 8 to 11 carbons,
- wherein said internal mold release composition provides said molded article with enhanced mold release properties, said components reacting in a mold to produce said molded article having enhanced mold release properties.
Dependencies are inferred from the claim text.