Adhesive-forming composition and blend of adhesives obtained therefrom
First Claim
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1. An adhesive-forming composition comprising:
- a) adhesive-forming, moisture-curable silylated polyurethane prepolymer, the silylated polyurethane prepolymer being obtained from the silylation of a polyurethane prepolymer derived from the reaction of polybutadiene polyol and polyisocyanate, wherein the polybutadiene polyol possesses a number average molecular weight of from about 500 to about 10,000 and possesses a primary hydroxyl group content of from about 0.1 to about 2.0 meq/g; and
,b) adhesive other than the adhesive-forming, moisture-curable silylated polyurethane prepolymer (a), wherein the adhesive is selected from the group consisting of polyurethane adhesives, acrylic adhesives, silicone adhesives, and combinations thereof.
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Abstract
The present invention relates to novel adhesive-forming compositions of silylated polyurethane prepolymer blended with pre-formed adhesives, and pressure sensitive adhesives containing the same. The silylated polyurethane prepolymer is obtained from the silylation of a polyurethane prepolymer derived from the reaction of polybutadiene polyol and polyisocyanante, where the polybutadiene polyol possesses a primary hydroxyl group content of from about 0.1 to about 2.0 meq/g.
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19 Claims
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1. An adhesive-forming composition comprising:
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a) adhesive-forming, moisture-curable silylated polyurethane prepolymer, the silylated polyurethane prepolymer being obtained from the silylation of a polyurethane prepolymer derived from the reaction of polybutadiene polyol and polyisocyanate, wherein the polybutadiene polyol possesses a number average molecular weight of from about 500 to about 10,000 and possesses a primary hydroxyl group content of from about 0.1 to about 2.0 meq/g; and
,b) adhesive other than the adhesive-forming, moisture-curable silylated polyurethane prepolymer (a), wherein the adhesive is selected from the group consisting of polyurethane adhesives, acrylic adhesives, silicone adhesives, and combinations thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification