Polyether thiourea epoxy curing agents

Details Polyether thiourea epoxy curing agents Polyether thiourea epoxy curing agents

1975-03-06

1977-03-08

Pertilla, Theodore E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 2N, 260 47EN, 260 59EP, 260 79, 260552A, 260552R, C08G 4506

Patent

active

040112810

ABSTRACT:
An improved curable epoxy resin composition of a vicinalpolyepoxide and an effective amount of a novel polyether thiourea curing agent is disclosed. The improved curable epoxy resins which are useful as coatings, castings, sealants, and adhesives show improved tensile shear strength, flexural strength, and ultimate elongation. The novel polyether thiourea curing agents of the instant invention are characterized by terminal primary amino groups and are formed by reaction of polyoxyalkylenepolyamines with thiourea, thiourea forming compounds or carbon disulfide.
A preferred curing agent includes a mixture of a novel polyether thiourea formed by reaction of a polyoxypropylenepolyamine having a molecular weight of from about 200-2000 and an effective amount of carbon disulfide; and another known epoxy resin curing agent such as a polyoxyalkylenepolyamine in ratios of from about 5:1 to 1:5 by weight.

REFERENCES:
patent: 2957844 (1960-10-01), Wesp
patent: 3436359 (1969-04-01), Hubin
patent: 3573256 (1971-03-01), Kudo et al.
patent: 3591556 (1971-07-01), Godfrey et al.

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