Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1990-12-27
1993-06-01
Dean, Jr., Ralph H.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524862, 525478, 528 15, 528 31, 528 32, 428447, C08L 8305, C08G 7712
Patent
active
052160696
ABSTRACT:
A silicone self-adhesive comprising an organopolysiloxane obtained by partial condensation of from 40 to 80 parts by weight of a diorganopolysiloxane containing at least an alkenyl group and a aryl group and correspondingly from 60 to 20 parts by weight of a copolymer which consists essentially of SiO.sub.2 units and R'.sub.3 SiO.sub.0.5 units, in which each R' represents a monovalent hydrocarbon group having not larger than 3 carbon atoms, at a mixing ratio by mole of from 1:0.3 to 1:1.5 and which has at least one hydroxyl group directly bonded to a silicon atom in the molecule, and an organohydrogenpolysiloxane used in an amount sufficient to give from 1 to 30 Si-H bonds per one vinyl group of the above ingredient. A catalytically effective amount of a platinum catalyst is added to the above self-adhesive. An self-adhesive tape or sheet using the above self-adhesive is also provided.
REFERENCES:
patent: 2736721 (1956-02-01), Dexter
patent: 2814601 (1957-11-01), Currie
patent: 3527842 (1970-09-01), Clark
patent: 3528940 (1970-09-01), Modic
patent: 3983298 (1976-09-01), Hahn et al.
patent: 4774297 (1988-09-01), Murakami
Dean Jr. Ralph H.
Shin-Etsu Chemical Co. , Ltd.
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