Pressure sensitive adhesive

Details Pressure sensitive adhesive Pressure sensitive adhesive

C - Chemistry, Metallurgy

08

L

117/31, 400/5814

C08L 33/06 (2006.01) C09J 7/02 (2006.01) C08L 39/04 (2006.01)

Patent

CA 1137680

ABSTRACT OF THE DISCLOSURE An optically clear blend of (1) a water-soluble polymer of a vinyl lactam having the structure Image in which Y represents an alkylene bridge having three to five carbon atoms and (2) a tacky water-insoluble copolymer of (A) an ester or a mixture of esters having the structure Image in which R' represents hydrogen or methyl and R1 represents alkyl having from 1 to 14 carbon atoms and (B) from 1 to 12% by weight, based on the copolymer, of an ethylenic monomer containing an acid group, said polymer being present in an amount from 1 to 30% by weight of the blend, said copolymer having a glass transition temperature below 0°C and being present in an amount from 70 to 99% by weight of the blend and having a viscosity less than 50,000 cp at 350°F. The blend is useful as a pressure-sensitive adhesive composition.

349158

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