Microsphere pressure sensitive adhesive composition

Abstract

The present invention provides an adhesive made from a reaction product of: (a) a polymerizable monomer derived at least in part from non-petroleum resources; (b) an initiator; (c) a polymeric stabilizer, wherein the reaction occurs in water to yield a microsphere adhesive. The microsphere adhesive can be formulated into a pressure sensitive adhesive composition that can be applied to various substrates such as paper and polymeric film to produce repositionable adhesive coated articles such as tapes, notes, flags, easels and the like.

1 . A pressure sensitive adhesive composition comprising:
 (a) microsphere adhesive comprising a reaction product of: (i) at least one polymerizable monomer derived at least in part from non-petroleum resources; (ii) at least one initiator; and (iii) at least one stabilizer, wherein the reaction occurs in water; and   (b) at least one pressure sensitive adhesive binder.   
     
     
         2 . The adhesive composition of  claim 1  wherein the non-petroleum resource is castor oil. 
     
     
         3 . The adhesive composition of  claim 1  wherein the adhesive has a biobased carbon content of at least about 30%. 
     
     
         4 . The adhesive composition of  claim 1  wherein the adhesive has a biobased carbon content of at least about 40%. 
     
     
         5 . The adhesive composition of  claim 1  wherein the adhesive has a biobased carbon content of at least about 50%. 
     
     
         6 . The adhesive composition of  claim 1  wherein the adhesive has a biobased carbon content of at least about 65%. 
     
     
         7 . The adhesive composition of  claim 1  wherein the reaction product further comprises a surfactant. 
     
     
         8 . The adhesive composition of  claim 1  comprising from about 90 to 98 wt % component (a) and from about 1 to 10 wt % component (b). 
     
     
         9 . A pressure sensitive adhesive composition comprising:
 (a) microsphere adhesive comprising a reaction product of: (i) at least one polymerizable monomer derived at least in part from non-petroleum resources; (ii) at least one initiator; and (iii) at least one stabilizer, wherein the reaction occurs in water; and   (b) at least one thickener.   
     
     
         10 . The adhesive composition of  claim 9  wherein the non-petroleum resource is castor oil. 
     
     
         11 . The adhesive composition of  claim 9  wherein the adhesive has a biobased carbon content of at least about 30%. 
     
     
         12 . The adhesive composition of  claim 9  wherein the adhesive has a biobased carbon content of at least about 40%. 
     
     
         13 . The adhesive composition of  claim 9  wherein the adhesive has a biobased carbon content of at least about 50%. 
     
     
         14 . The adhesive composition of  claim 9  wherein the adhesive has a biobased carbon content of at least about 65%. 
     
     
         15 . The adhesive composition of  claim 9  wherein the reaction product further comprises a surfactant. 
     
     
         16 . The adhesive composition of  claim 9  comprising from about 90 to 98 wt % component (a) and from about 0.1 to 3.0 wt % component (b).