Patent ID: 7183351

Claim:
A hydrophilic adhesive composition, which comprises: a thermoplastic elastomer, which is selected from the group consisting of poly(styrene-olefin-styrene) block copolymers, poly(styrene-olefin) block copolymers and their mixtures, a tackifying product, a liquid plasticizer, water, and an amphiphilic ABA type block copolymer comprising two terminal thermoplastic poly(styrene) blocks A and one central elastomeric block B in which the central block B is a poly(ethylene-butylene) sequence comprising grafted hydrophilic groups, wherein said amphiphilic copolymer ABA is represented by the following structure: in which R 1 and R 2 , which are identical or different, represent a hydrophilic group of average molar mass less than 10,000, selected from the group consisting of: CH 3 —O—(CH 2 —CH 2 —O) n ; HO—(CH 2 —CH 2 —O) n ; and in which n, a and b represent an integer.