Pressure-sensitive adhesive

Details Pressure-sensitive adhesive Pressure-sensitive adhesive

1978-11-03

1980-07-22

Lieberman, Paul

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525127, C08L 7500

Patent

active

042140617

ABSTRACT:
A pressure-sensitive adhesive comprises the reaction product of (A) at least one alkyl acrylate liquid polymer containing both terminal and random hydroxyl functionality, as well as sulfide and optionally also disulfide linkages near the terminal portions of the polymer molecule; (B) at least one prepolymer of a polyester glycol or a polyalkylene ether glycol with an excess amount of an aromatic diisocyanate; and (C) at least one alkanediol containing from 3 to 10 carbon atoms. Use of the alkanediol improves 180.degree. peel strength and maintains U.V. stability of the adhesive.

REFERENCES:
patent: 3532634 (1970-09-01), Schmidle
patent: 3642943 (1972-02-01), Noel
patent: 3690946 (1972-09-01), Hartmann
patent: 3694415 (1972-09-01), Honda
patent: 3719638 (1973-03-01), Huemmer
patent: 3975457 (1976-08-01), Chang
patent: 4134935 (1979-01-01), Quiring
patent: 4137389 (1979-01-01), Wingler

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