Tackified acrylic pressure-sensitive adhesive

Details Tackified acrylic pressure-sensitive adhesive Tackified acrylic pressure-sensitive adhesive

C - Chemistry, Metallurgy

09

J

400/1821, 117/31

C09J 133/08 (2006.01) C09J 7/02 (2006.01) C09J 139/04 (2006.01) C09J 139/06 (2006.01)

Patent

CA 1328138

Abstract of the Disclosure A pressure-sensitive adhesive that has high cohesive strength and adheres permanently to high-solids automotive paint systems preferably comprises a mixture of (1) a crosslinked acrylic copolymer of acrylic acid ester and N-vinyl-2-pyrrolidone, and (2) certain tackifier resins. Useful tackifier resins are poly(isobornyl- methacrylate), pentaerythritol ester of rosin, and mixed- aliphatic/aromatic polymeric tackifier resins such as a t-butylated styrene. The tackifier resin preferably has a Tg of at least 30°C, Mn from 300 to 3000, and a solubility parameter from 8 to 9. The novel pressure-sensitive adhesive is particularly useful as a dense surface layer of a composite tape having a foamlike core.

563611

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