Silicone pressure sensitive adhesive composition
AssigneeGeneral Electric Company
InventorsRoy Griswold, Frank J. Traver, Jeffrey H. Wengrovius, Shaow B. Lin
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Abstract
A silicone pressure sensitive adhesive composition containing the condensation product of a silanol-functional silicone resin, wherein the resin contains M structural units according to the formula R3SiO1/2, wherein R is a monovalent hydrocarbon radical, and Q structural units according to the formula SiO4/2 in a ratio of M units to Q units of less than 1.1:1, a silanol-functional polydiorganosiloxane gum, and a crosslinker exhibits high tack and high lap shear strength.
Claims21
A silicone composition comprising the condensation product of:
- (a) a silanol-functional silicone resin, said resin comprising M structural units according to the formula R13SiO1/2, wherein each R1 is independently hydroxy or a monovalent hydrocarbon radical, and Q structural units according to the formula SiO4/2 in a ratio of M units to Q units of less than 1.1:1,
- (b) a silanol-functional polydiorganosiloxane gum, and
- (c) a crosslinker.
A method for providing a pressure sensitive adhesive composition, comprising condensing, at an elevated temperature in the presence of a base catalyst, a silanol-functional silicone resin, said resin comprising M structural units according to the formula R13SiO1/2, wherein each R1 is independently hydroxy or a monovalent hydrocarbon radical, and Q structural units according to the formula SiO4/2 in a ratio of M units to Q units of less than 1.1:1, a silanol-functional polydiorganosiloxane gum and a crosslinker.
An article, comprising a substrate and a layer of a silicone composition disposed on at least a portion of at least one surface of the substrate, said silicone composition comprising the condensation product of a silanol-functional silicone resin, said resin comprising M structural units according to the formula R13SiO1/2, wherein each R1 is independently hydroxy or a monovalent hydrocarbon radical, and Q structural units according to the formula SiO4/2 in a ratio of M units to Q units of less than 1.1:1, a silanol-functional polydiorganosiloxane gum and a crosslinker.
A method for making an article, comprising applying a layer of a silicone composition on at least a portion of at least one surface of a substrate, said silicone composition comprising the condensation reaction product of a silanol-functional silicone resin, said resin comprising M structural units according to the R13SiO1/2, wherein each R1 is independently hydroxy or a monovalent hydrocarbon radical, and Q structural units according to the formula SiO4/2 in a ratio of M units to Q units of less than 1.1:1, a silanol-functional polydiorganosiloxane gum and a crosslinker.
Dependencies are inferred from the claim text.