Polyurethane urea heat seal adhesive for the preparation of heat

Details Polyurethane urea heat seal adhesive for the preparation of heat Polyurethane urea heat seal adhesive for the preparation of heat

1980-02-08

1981-12-22

Gallagher, John J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

2 87, 156277, 156291, 1563317, 1563082, 428200, 428246, 4284231, 4284233, 528 61, 528 65, C08J 300

Patent

active

043070043

ABSTRACT:
The invention disclosed herein relates to a method for bonding the opposing surfaces of textile materials to each other with a heat-seal adhesive. The heat-seal adhesive is a polyurethane urea heat-seal adhesive prepared by first preparing a chain-extended polyurethane from at least one diisocyanate, at least one polydiol, and chain-extenders. The chain-extenders may comprise a mixture of low molecular weight diols comprised of at least one low molecular weight diol having a molecular weight below about 500 and having side chains or ether groups, and at least one unbranched low molecular weight diol having a molecular weight below about 500. The chain-extended polyurethane has a free-isocyanate group content which comprises from about 10 to about 40 mole percent of the isocyanate content of the starting mixture. An emulsifier is added to the chain-extended polyurethane, and the polyurethane and emulsifier mixture is emulsified with water. Diamines or diamine mixtures may be added to the emulsion.

REFERENCES:
patent: 2968575 (1961-01-01), Mallonee
patent: 3252848 (1966-05-01), Borsellino
patent: 3401133 (1968-09-01), Grace et al.
patent: 3463690 (1969-08-01), Converse et al.
patent: 3655627 (1972-04-01), Hutzler et al.
patent: 3684639 (1972-08-01), Keberle et al.
patent: 4116741 (1978-09-01), Thoma et al.
patent: 4160686 (1979-07-01), Niederdellman et al.

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