INTERNAL MOLD RELEASE AGENTS FOR POLYURETHANE MATERIALS
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United States of America Patent
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Issued Date -
Aug 21, 2014
app pub date -
Feb 19, 2013
filing date -
Feb 19, 2013
priority date (Note) -
Abandoned
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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.
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