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US 4,906,695 AGranted
Pressure-sensitive adhesives containing an alkoxy-functional silicon compound
AssigneeDow Corning Corporation
InventorsJohn D. Blizzard, Terence J. Swihart
Life of this patent
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Abstract
The invention relates to a method of contacting two components to form a pressure-sensitive adhesive (PSA) construction, wherein the first component comprises a conventional PSA modified with an alkoxy-functional silicon compound and the second component comprises the same PSA modified with a cure agent for the alkoxy-functional silicon compound. The method provides improved adhesive bond strength over the unmodified PSA which generally increases with time.
Claims24
A method for forming a pressure-sensitive adhesive construction comprising:
- contacting a first component comprising
- (I) a pressure-sensitive adhesive;
- and
- (II) an alkoxy-functional silicon compound selected from the group consisting of
- (a) at least one alkoxysilane having the general formula
- R'.sub.g Si(OR).sub.4-g
- in which R' is a monovalent hydrocarbon group having 1 to 10 carbon atoms, R is an alkyl radicals having 1 to 4 carbon atoms and g can have an average value of 0 to 3 inclusive, and
- (b) a partially hydrolyzed condensate of said alkoxysilane (a),
- with a second component comprising (III) said pressure-sensitive adhesive;
- and
- (IV) a cure agent for said alkoxy-functional silicon compound.
8 more elements
A composition comprising:
- (I) a pressure-sensitive adhesive selected from the group consisting of those based on natural, butyl, acrylic, styrene-butadiene, polyisobutylene, isoprene, isoprene-isobutylene, chloroprene, polyvinylether, chlorinated and polyurethane rubber;
- and
- (II) from about 0.05 to 25 parts by weight per 100 parts by weight of said pressure-sensitive adhesive of an alkoxy-functional silicon compound selected from the group consisting of
- (a) at least one alkoxysilane having the general formula
- R'.sub.g Si(OR).sub.4-g
- in which R' is a monovalent hydrocarbon group having 1 to 10 carbon atoms, R is an alkyl radical having 1 to 4 carbon atoms and g has an average value of 0 to 3 inclusive, and
- (b) a partially hydrolyzed condensate of said alkoxysilane (a).
4 more elements
Dependencies are inferred from the claim text.