Polyhydroxyl-compositions derived from castor oil with...

Details Polyhydroxyl-compositions derived from castor oil with... Polyhydroxyl-compositions derived from castor oil with...

2005-05-24

2005-05-24

Tsang, Cecilia J. (Department: 1625)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

Reexamination Certificate

active

06897283

ABSTRACT:
A reactive polyester polyol is described that is obtainable by half ester formation starting from at least one dicarboxylic anhydride and at least one hydroxyl group carrying, saturated or unsaturated fatty acid and/or a respective ester, in particular castor oil and/or ricinoleic acid, as well as final esterification by at least one polyol.

REFERENCES:
patent: 4789705 (1988-12-01), Kase et al.
patent: 5468802 (1995-11-01), Wilt et al.
patent: 10330470 (1998-12-01), None
patent: 410330470 (1998-12-01), None

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