Stock material or miscellaneous articles – Layer or component removable to expose adhesive – Polymer derived only from ethylenically unsaturated monomer
Patent
1997-07-18
1999-02-02
Pezzuto, Helen L.
Stock material or miscellaneous articles
Layer or component removable to expose adhesive
Polymer derived only from ethylenically unsaturated monomer
428 401, 442 87, 442 99, A61F 1302
Patent
active
058662227
ABSTRACT:
There is provided a block, segmented or graft copolymer having polyorganosiloxane segments and self-associating hard segments, which copolymer is capable of forming a solid, generally non-tacky release coating without the requirement of curing. The release coating comprises the polyorganosiloxane copolymer admixed with an MQ resin wherein the amount of MQ resin is generally between 1 and 30 weight percent of the polyorganosiloxane content preferably 1 to 20 weight percent. The MQ resin modifies the copolymer release material to have a higher release than the copolymer itself, generally at least 10 percent and preferable at least 20 percent up to 50 percent or higher with the readhesion values decreasing by 50 percent or less, preferably 40 percent or less.
REFERENCES:
patent: 4002794 (1977-01-01), Schwarcz
patent: 4707531 (1987-11-01), Shirahata
patent: 4728571 (1988-03-01), Clemens et al.
patent: 5512650 (1996-04-01), Leir et al.
Bany Stephen W.
Kinning David J.
Seth Jayshree
Bond William J.
Griswold Gary L.
Minnesota Mining and Manufacturing Co.
Pezzuto Helen L.
Sprague Robert W.
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