Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1976-05-03
1977-08-16
Griffin, Ronald W.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 22EP, 260 26, 260 75N, 260 77, 260835, C08G 6944, C09D 370, C09D 372
Patent
active
040425460
ABSTRACT:
The reactive polyester-amide polymers of this invention are comprised of trihydric alcohols, aminoalcohols, and aliphatic dicarboxylic acids, containing an excess of functional groups reactive with carboxylic acid, and condensation heat-polymerized to an acid number of approximately 50.
The polymerization is carried short of gelation so that the polymer remains soluble in solvents. Cure is subsequently effected by using the reactive polyester-amide, either from solution or as 100% solids, as a co-reactant with polyepoxides and polyisocyantates at relatively low temperatures.
The preferred ratio of the components of the polyester-amide polymers of this invention is approximately 1-mol of a trihydric alcohol: 1-mol of a monoamino-monohydric alcohol: 2-moles of an aliphatic dibasic acid. The cured reaction products of reactive polyester-amide with polyepoxides and polyisocyanates can be controlled from rigid-brittle to rigid-flexible to soft-flexible depending on the selection and the mol ratios of the resin components. Reaction with polyepoxides and polyisocyanates may be conducted at room temperature or accelerated by elevating the temperature, concomitantly increasing the toughness of the cured products, having useable temperature ranges from about -40.degree. C. to 200.degree. C.
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