Adhesive composition

Details Adhesive composition Adhesive composition

1978-01-26

1978-11-14

Welsh, M. J.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

36 195, 156331, 528 67, 528 76, C08G 1848

Patent

active

041255224

ABSTRACT:
A polyurethane adhesive, suitable for bonding of shoe uppers to shoe soles, is based on an isocyanateterminated prepolymer made from tolylene diisocyanate, a poly(tetramethyleneoxy) glycol, and a poly(ethyleneoxy) compound having 7-30 ethyleneoxy groups and 1 or 2 hydroxyl groups. This prepolymer can be cured with a mixture of a methylenedianiline/sodium chloride complex with urea at a temperature of 70.degree. C, which is safe for the usual shoe materials. Adhesive compositions containing both the prepolymer and the curing agent have at room temperature a potlife of at least 24 hours.

REFERENCES:
patent: 2929800 (1960-03-01), Hill
patent: 2968575 (1961-01-01), Mallonee
patent: 3034791 (1962-05-01), Gallagher
patent: 3711364 (1973-01-01), Akramjian
patent: 3755261 (1973-08-01), VanGulick
patent: 3876604 (1975-04-01), Caruso et al.
patent: 3891606 (1975-06-01), Kogon
patent: 3969301 (1976-07-01), Thurn
patent: 4010146 (1977-03-01), Russell et al.
patent: 4017464 (1977-04-01), Kimball

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