Stratum having release properties and method of making

Details Stratum having release properties and method of making Stratum having release properties and method of making

1975-08-13

1976-12-14

Willis, Jr., P.E.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Adhesive outermost layer

427387, 428354, 428423, 428425, 428447, C09J 702, B05D 302

Patent

active

039977021

ABSTRACT:
A stratum having accurately predictable and controllable release properties toward normally tacky and pressure-sensitive adhesive sheet materials is prepared by reacting two moieties, one terminated with a plurality of isocyanate groups and the other a liquid hydroxyl- or amine-containing organosilicone. The hydroxyl or amine groups are at least three carbon atoms distant from the nearest silicone atom and constitute no more than about 4% by weight of the organosilicone. Depending upon the release characteristics achieved, the reaction product can function as a shaped article, all or part of a release liner, or as a low-adhesion backsize for pressure-sensitive adhesive tape.

REFERENCES:
patent: 3178391 (1965-04-01), Holtschmidt et al.
patent: 3179622 (1965-04-01), Haluska
patent: 3246048 (1966-04-01), Haluska
patent: 3503782 (1970-03-01), Ayres
patent: 3565750 (1971-02-01), Evans
patent: 3632557 (1972-01-01), Brode et al.
patent: 3690924 (1972-09-01), Estes
patent: 3749593 (1973-07-01), Keiser

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