Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By gas forming or expanding
Patent
1986-01-15
1986-09-02
Welsh, Maurice J.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By gas forming or expanding
106 3822, 106 3824, 106 3825, 252311, 252312, 264 39, 264 53, 264 54, 521 51, C08G 1814
Patent
active
046095110
ABSTRACT:
A release agent is described, which is suitable for the production of polyurethane foam articles in molds. It is an aqueous emulsion or dispersion of per se known release-effective substances as well as optionally conventional additives, having a water content of at least 60% by weight and preferably 85 to 96% by weight, the water being masked through the effect of lyotropic mesomorphism. Masking and immobilizing the water molecules avoids that the water molecules have a prejudicial effect of the polyol/isocyanate reaction, and is preferably achieved by the combined use of release-effective substances and suitable masking aids. As suitable masking aids especially fatty alcohol polyglycol ethers and ethoxylated fatty alcohols are proposed. The polyurethane articles obtained while using the above described release agent fulfil the standard quality requirements without any of the disadvantageous effects on the environment such as occur with conventional release agents.
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Comments to References cited by German Examiner.
Fischer Wolfgang
Krug William
Baker William L.
Newland Bart G.
W. R. Grace & Co.
Welsh Maurice J.
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