Optically clear organosiloxane adhesive compositions

Details Optically clear organosiloxane adhesive compositions Optically clear organosiloxane adhesive compositions

1989-06-22

1990-12-18

Marquis, Melvyn I.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524264, 524268, 524588, 524731, 525478, C08K 906

Patent

active

049786962

ABSTRACT:
Liquid organosiloxane compositions that cure by a hydrosilylation reaction and contain from 0.1 to about 2 weight percent of a low molecular weight polymethylvinylsiloxane cure to form adhesives that are sufficiently flexible to retain cohesive bonding between substrates exhibiting different coefficients of thermal expansion when the resulting composite is exposed to variations in temperatures during use. The flexibility of the cured adhesive is further increased by addition to the curable compositions of a liquid polydimethylsiloxane having a silanol group at one of the two terminal positions and a triorganosiloxy group at the second terminal position. Preferred compositions are packaged in at least two parts, with the organohydrogensiloxane and the hydrosilylation catalyst being located in different parts of said composition.

REFERENCES:
patent: 3699072 (1972-10-01), Clark et al.
patent: 3892707 (1975-07-01), Itoh et al.
patent: 4082726 (1978-04-01), Mine et al.
patent: 4196273 (1980-04-01), Imai et al.
patent: 4329273 (1982-05-01), Hardman et al.
patent: 4490500 (1984-12-01), Smith

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