Radiation curing silicone rubber composition and adhesive silicone elastomer film
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsTsutomu Kashiwagi, Toshio Shiobara
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Abstract
A radiation curing silicone rubber composition is provided. This composition includes as a base polymer either a liquid polysiloxane with a (meth)acryloyl group and a hydrosilyl group, or a combination of a liquid polysiloxane with at least two (meth)acryloyl groups and a liquid polysiloxane with a hydrosilyl group. This composition is formed into a film, and then subjected to radiation curing, thereby producing an adhesive silicone rubber elastomer film with low elasticity, adequate heat resistance, powerful adhesion and good workability. This film is useful for bonding electronic components using methods such as die bonding.
Claims21
A radiation curing silicone rubber composition comprising:
- (A) 5 to 100 parts by weight of an organohydrogenpolysiloxane with at least one group selected from the group consisting of acryloyl groups and methacryloyl groups, and at least one hydrosilyl group within each molecule,
- (B) 95 to 0 parts by weight of a liquid organopolysiloxane with at least two groups selected from the group consisting of acryloyl groups and methacryloyl groups within each molecule, and with no hydrosilyl groups, wherein, a combined weight of said constituent (A) and said constituent (B) is 100 parts by weight,
- (C) 0.1 to 30 parts by weight of at least one compound selected from the group consisting of alkoxysilanes, partial hydrolysis-condensation products of alkoxysilanes, organosilane modified isocyanurates and organosiloxane modified isocyanurates, and
- (D) an effective quantity of a radiation sensitizer.
A radiation curing silicone rubber composition comprising:
- (B) 100 parts by weight of a liquid organopolysiloxane with at least two groups selected from the group consisting of acryloyl groups and methacryloyl groups, and with no hydrosilyl groups within each molecule,
- (D) an effective quantity of a radiation sensitizer, and
- (E) 0.5 to 50 parts by weight of an organohydrogenpolysiloxane with at least one hydrosilyl group within each molecule, and with neither acryloyl groups nor methacryloyl groups.
Dependencies are inferred from the claim text.