Pressure sensitive adhesive and process

Details Pressure sensitive adhesive and process Pressure sensitive adhesive and process

C - Chemistry, Metallurgy

08

L

400/1100, 400/18

C08L 101/08 (2006.01) C08L 7/02 (2006.01) C08L 9/10 (2006.01) C09J 113/02 (2006.01) C09J 193/00 (2006.01)

Patent

CA 1109585

Abstract of Disclosure -- A water based rubber resin pressure-sensitive adhesive produced by mixing a high solids resin solution on with an isoprene containing latex together with a small amount of carboxylation at a pH of at least about 8. The tackifier resin is added to rubber latex in a high solids resin solution in an organic solvent. Preferably this solution contains a small amount of a polar solvent such as isopropyl alcohol. The carboxylation may be derived either from using a carboxylated latex or from using a carboxylated resin in the resin solution, or a combination of both of these. The resin solution is dispersed in the water system of the latex in a finely divided state. This prefer- ably is accomplished by adding the resin solution to the latex system slowly with high shear agitation.

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