Silicone pressure sensitive adhesive and articles
First Claim
Patent Images
1. A medical device comprising:
- a substrate; and
a pressure sensitive adhesive composition disposed on the substrate;
wherein the adhesive exhibits a 180°
peel adhesion force from polypropylene of less than 100 g/linear inch at a rate of 90 inches per minute and the adhesive composition comprises an unreactive mixture ofabout 10 wt-% to about 20 wt-% polydiorganosiloxane polyurea copolymer;
30 wt-% to 50 wt-% of a diluent, wherein the diluent has a number average molecular weight of no more than about 30,000 g/mole; and
greater than 30 wt-% to less than about 60 wt-% of silicate tackifying resin.
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Abstract
Pressure sensitive adhesive compositions comprising an unreactive mixture of polydiorganosiloxane polyurea copolymer, diluent, and silicate tackifying resin. The compositions are useful for articles such as medical devices.
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Citations
17 Claims
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1. A medical device comprising:
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a substrate; and a pressure sensitive adhesive composition disposed on the substrate; wherein the adhesive exhibits a 180°
peel adhesion force from polypropylene of less than 100 g/linear inch at a rate of 90 inches per minute and the adhesive composition comprises an unreactive mixture ofabout 10 wt-% to about 20 wt-% polydiorganosiloxane polyurea copolymer; 30 wt-% to 50 wt-% of a diluent, wherein the diluent has a number average molecular weight of no more than about 30,000 g/mole; and greater than 30 wt-% to less than about 60 wt-% of silicate tackifying resin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A medical device comprising:
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a substrate; and a pressure sensitive adhesive composition disposed on the substrate; wherein the adhesive composition comprises an unreactive mixture of about 10 wt-% to about 20 wt-% of polydiorganosiloxane polyurea copolymer; 30 to 50 wt-% of a diluent, wherein the diluent has a number average molecular weight of no more than about 30,000 g/mole; and greater than 30 wt-% to less than about 60 wt-% of silicate tackifying resin. - View Dependent Claims (14, 15, 16)
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17. A pressure sensitive adhesive composition comprising an unreactive mixture of
about 10 wt-% to about 20 wt-% of a polydiorganosiloxane polyurea copolymer; -
30 wt-% to 50 wt-% of a diluent, wherein the diluent has a number average molecular weight of no more than about 30,000 g/mole; and greater than 30 wt-% to less than 60 wt-% of silicate tackifying resin.
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Specification