Radiation curable organosiloxane gel compositions

Details Radiation curable organosiloxane gel compositions Radiation curable organosiloxane gel compositions

1989-12-01

1991-11-05

McCamish, Marion E.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428450, 428901, 522 99, B32B 906, B32B 1504, C08G 7700

Patent

active

050631020

ABSTRACT:
Organosiloxane compositions that cure in the presence of ultraviolet radiation comprise a polymethylsiloxane containing a specified combination of mono-, di- and trifunctional siloxane units, an amount of a mercaptoalkyl-substituted polyorganosiloxane or an organic mercaptan in an amount sufficient to cure the composition to a soft, repairable gel and an amount of a photoinitiator sufficient to initiate curing of the composition in the presence of ultraviolet radiation. The cured compositions are particularly useful as coatings and encapsulants to protect electronic devices against the deleterious effects of materials present in the environment adjacent to said devices.

REFERENCES:
patent: 3020260 (1962-02-01), Nelson
patent: 3873499 (1975-03-01), Michael et al.
patent: 4052529 (1977-10-01), Bokerman et al.
patent: 4303484 (1981-12-01), Takamizawa et al.
patent: 4374967 (1983-02-01), Brown et al.
patent: 4780486 (1988-10-01), Lee et al.

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