Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1998-12-08
2000-12-26
Niland, Patrick D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524109, 524114, 524590, 528 73, 560331, C08J 300, C08K 320, C08L 7500, C08G 1828, C08G 1877
Patent
active
061661287
ABSTRACT:
This invention relates to a process for the reduction of color of polymethylene poly(phenylisocyanates). This process comprises mixing a polymethylene poly(phenylisocyanate) with an epoxide having an epoxide equivalent weight of about 44 to about 700, and heating this mixture to a temperature of from about 35 to about 150.degree. C. for at least about 15 minutes, with stirring. Suitable epoxides include epoxidized fatty acid monoglycerides, epoxidized fatty acid diglycerides, epoxidized fatty acid triglycerides, epoxidized dimer fatty acids and epoxidized trimer fatty acids.
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Adkins Rick L.
Blue Clarence D.
Bolton Jeffrey S.
Bourgeois Kirk J.
Kratz Mark R.
Bayer Corporation
Brown N. Denise
Gil Joseph C.
Niland Patrick D.
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