主权项 |
1. An adhesive composition comprising:
a hydrophobic polymer selected from polyisobutylenes, butyl rubbers, natural rubber adhesives, vinyl ether polymers, polysiloxanes, polyisoprenes, styrene-isoprene-styrene block copolymers, styrene-butadiene-styrene block copolymers, isobutylene-isoprene copolymers, butadiene acrylonitrile rubber, polychloroprenes, ethylene-propylene-diene terpolymers, acrylates, and combinations thereof; an elastomeric plasticizer; a tackifying resin; a hydrophilic polymer selected from poly(N-vinyl lactams), poly(N-vinyl amides), poly(N-vinyl acrylamides), poly(N-alkylacrylamides), polyacrylic acids, polymethacrylic acids, polyvinyl alcohol, polyvinyl amine, and copolymers and blends thereof; a third polymer capable of hydrogen bonding to the hydrophilic polymer, and clay particles comprised of a water-swellable clay mineral. |