Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1978-02-06
1979-12-11
Pertilla, Theodore E.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
156327, 260553R, 428418, 528 68, 528120, 525507, 528367, C08G 5950
Patent
active
041784278
ABSTRACT:
An improved curable epoxy resin composition of a vicinalpolyepoxide and an effective amount of a novel polyether urea 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 urea curing agents of the instant invention are characterized by terminal primary amino groups and are formed by reaction of polyoxyalkylenepolyamines with urea, urea forming compounds, or bifunctional isocyanates.
A preferred curing agent includes a mixture of a novel polyether urea formed by reaction of a polyoxypropylenepolyamine having a molecular weight of from about 200-2000 and an effective amount of urea; and another known epoxy resin curing agent such as polyoxyalkylenepolyamine in ratios of from about 5:1 to 1:5 by weight.
REFERENCES:
patent: 3436359 (1969-04-01), Hubin
patent: 3591556 (1971-07-01), Godfrey et al.
patent: 3639338 (1972-02-01), Kuder
patent: 3931116 (1976-01-01), Bernstein et al.
Schulze Heinz
Waddill Harold G.
Pertilla Theodore E.
Priem Kenneth R.
Ries Carl G.
Texaco Development Corp.
Whaley Thomas H.
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