Rim polyol blends containing acidic siloxane internal mold release agents and tin catalysts
AssigneeAir Products and Chemicals, Inc.
InventorJohn E. Dewhurst
Life of this patent
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Abstract
In an active hydrogen-containing B-side composition for reaction with a polyisocyanate-containing A-side composition to make a polyurethane or polyurethaneurea elastomer by reaction injection molding, the improvement which comprises a mold release composition consisting essentially of (1) the reaction product of a mixture of a carboxylic acid, a tertiary amine, and a reactive epoxide and (2) a carboxy functional siloxane.
Claims19
In an active hydrogen-containing B-side composition for reaction with a polyisocyanate-containing A-side composition to make a polyurethane, polyurethaneurea or polyurea elastomer by reaction injection molding, which B-side composition consists essentially of polyol, urethane catalyst, an internal mold release composition, silicone surfactant and, optionally, a diol and/or diamine chain extender, the improvement which comprises an internal mold release composition consisting essentially of (1) the reaction product of a mixture of a carboxylic acid, a tertiary amine, and a reactive epoxide and (2) a carboxy functional siloxane.
In an active hydrogen-containing B-side composition for reaction with a polyisocyanate-containing A-side composition to make a polyurethane, polyurethaneurea or polyurea elastomer by reaction injection molding, which B-side composition consists essentially of polyol, urethane catalyst, an internal mold release composition, silicone surfactant and, optionally, a diol and/or diamine chain extender, the improvement which comprises a mold release composition consisting essentially of (1) the reaction product of a mixture of a C.sub.12 -C.sub.36 fatty acid, a tertiary amine having at least one C.sub.12 -C.sub.18 alkyl substituent and a C.sub.2 -C.sub.21 reactive epoxide and (2) a carboxy functional siloxane consisting essentially of from 0.5 to 20 mole % of R.sub.a R'.sub.b SiO.sub.4-a-b/2 units and from 80 to 99.5 mole % of R".sub.c SiO.sub.4-c/2 units wherein
- R is a carboxy functional radical,
- R' is a hydrocarbon or substituted hydrocarbon radical,
- R" is a hydrocarbon or substituted hydrocarbon radical,
- a has an average value of from 1 to 3,
- b has an average value of from 0 to 2,
- a+b is from 1 to 3, and
- c has an average value of from 0 to 3.
An internal mold release composition consisting essentially of (1) the reaction product of a mixture of a C.sub.12 -C.sub.36 fatty acid, a tertiary amine having at least one C.sub.12 -C.sub.18 alkyl substituent and a C.sub.2 -C.sub.21 reactive epoxide and (2) a carboxy functional siloxane consisting essentially of from 0.5 to 20 mole % of R.sub.a R'.sub.b SiO.sub.4-a-b/2 units and from 80 to 99.5 mole % of R".sub.c SiO.sub.4-c/2 units wherein
- R is a carboxy functional radical,
- R' is a hydrocarbon or substituted hydrocarbon radical,
- R" is a hydrocarbon or substituted hydrocarbon radical,
- a has an average value of from 1 to 3,
- b has an average value of from 0 to 2,
- a+b is from 1 to 3, and
- c has an average value of from 0 to 3.
The internal mold release composition of claim in which the alkyl substituent of the tertiary amine is lauryl, myristyl, cetyl or stearyl.
Dependencies are inferred from the claim text.