Silicone pressure sensitive adhesive composition containing functionalized polyisobutylene
AssigneeDow Corning Corporation
InventorsPaul William Pretzer, Randall Paul Sweet
Life of this patent
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Abstract
A pressure sensitive adhesive composition which contains a mixture of a silicate resin, a polyorganosiloxane fluid, and a polyisobutylene polymer having at least one functionalized silicon containing moiety. One advantage of the present invention is that it provides a silicone pressure sensitive adhesive composition that has a reduced propensity for cold flow relative to many current silicone pressure sensitive adhesives.
Claims20
A pressure sensitive adhesive composition, comprising:
- (A) a silicate resin;
- (B) a polyorganosiloxane fluid;
- and
- (C) a polyisobutylene polymer having at least one functionalized silicon containing moiety,
- wherein the pressure sensitive adhesive composition exhibits tackiness and adhesiveness upon applying pressure thereto.
A pressure sensitive adhesive composition comprising the reaction product of:
- blending components (A), (B), and (C), then heating said blend in the presence of a silanol condensation catalyst, wherein (A) is a silicate resin, (B) is a polyorganosiloxane fluid, and (C) is a polyisobutylene polymer having at least one functionalized silicon containing moiety.
A pressure sensitive adhesive composition comprising the reaction product of:
- blending components (A) and (B), then heating in the presence of a catalyst to form a reaction intermediate, then adding component (C) to the reaction intermediate, wherein and (A) is a silicate resin, (B) is a polyorganosiloxane fluid, and (C) is a polyisobutylene polymer having at least one functionalized silicon containing moiety.
Dependencies are inferred from the claim text.