Pressure-sensitive adhesive composition

Abstract

The present invention aims at provision of a pressure-sensitive adhesive composition that affords a cured product having good adhesive property. Reduction of the amount of tackifier resin to be used, which is attributable to the good adhesive property, is a secondary object of the present invention. The above-mentioned problem can be solved by a pressure-sensitive adhesive composition containing (A) a polyoxyalkylene polymer having at least one alkenyl group in one molecule, (B) a compound having 1 to 3 hydrosilyl groups on average in one molecule, and (C) a hydrosilylation catalyst as essential components.

1 - 6 . (canceled) 
     
     
         7 . A method providing a pressure-sensitive adhesive coated substrate, comprising,
 a) providing a composition capable of being crosslinked to form a pressure-sensitive adhesive comprising (A) a polyoxyalkylene polymer having at least one alkenyl group in one molecule, (B) a compound having 1 to 3 hydrosilyl groups on average in one molecule and (C) a hydrosilylation catalyst as essential components; and   b) applying the composition to a substrate;   
       wherein the composition is thermally cured to provide a pressure-sensitive adhesive product. 
     
     
         8 . The method of  claim 7 , wherein the composition is directly coated onto the substrate. 
     
     
         9 . The method of  claim 7 , wherein the composition is coated onto a release paper and cured to form a pressure-sensitive adhesive coating film, followed by transfer of the pressure-sensitive adhesive coating film to the substrate. 
     
     
         10 . The method of  claim 7 , wherein the substrate is selected from the group consisting of a film made of a synthetic resin or modified natural substance, paper, fabric and metal foil. 
     
     
         11 . The method of  claim 7 , wherein the substrate is a film selected from the group consisting of polyethylene, polypropylene, polyimide, polycarbonate, polyvinyl chloride, polyester, polyurethane, and cellophane. 
     
     
         12 . The method of  claim 7 , wherein the substrate is selected from the group consisting of impregnated paper, coated paper, quality paper, kraft paper, fabric, acetate fabric, nonwoven fabric and glass fabric. 
     
     
         13 . The method of  claim 7 , wherein the substrate is a laminate of at least two layers of materials. 
     
     
         14 . The method of  claim 7 , wherein said compound (B) has a structural formula represented by the following formula (1): 
       
         
           
           
               
               
           
         
       
       wherein 1≦m≦3 and 1≦n≦8. 
     
     
         15 . The method of  claim 7 , wherein said compound (B) has 1:8-2.8 hydrosilyl groups on average in one molecule and a number average molecular weight of 400-3000. 
     
     
         16 . The method of  claim 7 , wherein [amount of hydrosilyl group in said compound (B)]/[total amount of alkenyl group in component (A)] is 0.4-0.8. 
     
     
         17 . The method of  claim 7 , wherein the polyoxyalkylene polymer having an alkenyl group for said (A) has a number average molecular weight of 6,000. 
     
     
         18 . The method of  claim 7 , wherein the polyoxyalkylene polymer for said (A) has 1-2 alkenyl groups on average in one molecule.