Adhesive their preparation and use

Details Adhesive their preparation and use Adhesive their preparation and use

1990-02-05

1991-05-21

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

128 82, 128155, 128844, 4284231, 528 49, C08G 1814

Patent

active

050176250

ABSTRACT:
Skin friendly pressure sensitive adhesives in the form of inherently tacky polyurethane-containing gells may be prepared by reacting an isocyanate prepolymer, which is itself the reaction product of poly-functional isocyanate and polyoxyalkylene diol monoalkyl ether, with a hydroxyl-containing ester of acrylic or methacrylic acid and optionally other hydroxyl containing compounds and then cross-linking the polymer so formed by means of irradiation. The proportion of acrylate chosen is such that it will react with at least 15 to 25% of the free isocyanate groups in the prepolymer and the remainder react with the other hydroxyl containing compound. The adhesives are capable of absorbing up to 95%, typically from 35 to 95% by weight of water when hydrated. The use of the adhesive in highly moisture vapor permeable dressings is also disclosed.

REFERENCES:
patent: 4192762 (1980-04-01), Osborn

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