Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1993-03-23
1995-03-21
Vargot, Mathieu D.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
264300, 2643286, 106 3824, B29C 3902, B29C 3362
Patent
active
053993101
ABSTRACT:
Mold release agents and methods for molding plastics are provided. They are especially applicable to polyurethane-based reaction injection molding (RIM) systems. The mold release agent includes the lithium, sodium, or potassium salt, or a mixture thereof, of an oligomer of monomeric units or a mixture of said oligomers, the monomeric units being selected from the group consisting of carboxylic fatty acids having at least 14 carbon atoms, preferably 14 to 24 carbon atoms, the salt of the oligomer preferably being soluble in water or water/alcohol. Preferably, the Li and Na salts of C.sub.36 and C.sub.44 dicarboxylic fatty acids are used. Preferred embodiments of the present invention permit the use of water without alcohol in the formulation.
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Martin David L.
Payne Jeffrey S.
The Dexter Corporation
Vargot Mathieu D.
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