Internal mold release agents for polyurethane materials
AssigneesHenkel Corporation, Henkel AG & Co. KGaA
InventorsQiwen Han, Andreas Ferencz, Olaf Lammerschop, Yongxia Wang
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Abstract
An internal mold release agent (IMRA) which effectively releases a cured polyurethane (PU) material from a metal, in particular steel, mold. The IMRA is a surface active agent containing phosphorus or a combination (blend or reaction product) of the agent with other chemicals. In one embodiment the agent is a phosphate ester. In one embodiment the agent is polyoxyethylene alkyl phosphate ester. A polyurethane formulation comprising the IMRA has high formulation stability, clean release, low release strength, and high product transparency.
Claims12
An internal mold release agent for a polyurethane molding resin comprising a polyoxyethylene alkyl phosphate ester, a blend or a reaction product of a polyoxyethylene alkyl phosphate ester.
Dependencies are inferred from the claim text.