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US 6,559,246 B2Granted
Primer composition for silicone pressure-sensitive adhesives
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsYasuyoshi Kuroda, Shunji Aoki, Masahiko Ogawa
Life of this patent
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Abstract
A primer composition comprising (A) a diorganopolysiloxane having an average degree of polymerization of 500-2,000 and alkenyl groups at both ends of its molecular chain in an amount of 0.001-0.005 mol per 100 g of the diorganopolysiloxane, (B) an organohydrogenpolysiloxane having at least two SiH groups in a molecule, (C) a platinum base curing catalyst, and (D) a retarder is effective for improving the adhesion between various plastic films and silicone pressure-sensitive adhesives and thus forming satisfactory pressure-sensitive adhesive tapes.
Claims18
An adhesive tape comprising:
- (A) a diorganopolysiloxane having alkenyl groups at both ends of its molecular chain and an average degree of polymerization of 500 to 2,000, wherein the amount of alkenyl groups being 0.001 to 0.005 mol per 100 g of the diorganopolysiloxane
- (B) an organohydrogenpolysiloxane having at least two hydrogen atoms directly attached to silicon atoms in a molecule;
- (C) a platinum base curing catalyst;
- (D) a retarder;
- and
- (E) an organopolysiloxane having at least one epoxy group-containing organic group, at least one hydrogen atom, and at least one alkoxysilyl group containing alkyl group, each directly attached to a silicon atom, in the organopolysiloxane molecule.
3 more elements
Dependencies are inferred from the claim text.