| 摘要 |
The present invention relates to adhesive compositions that comprise: i. at least one block copolymer (i)(a) of the formula A-I-A (1) or (A-I)<SUB>n</SUB>X (2) and at least one block copolymer (i)(b) of the formula A-(I-B)-A (3) or [A-(I/B)]<SUB>n</SUB>-X (4), wherein each A independently is a polymer block of an aromatic vinyl compound, I is a poly(isoprene) polymer block, (I/B) is a mixed random polymer block of isoprene and butadiene in a weight ratio I:B of from about 20:80 to about 80:20, n is an integer equal to or greater than 2 and X is the residue of a coupling agent, and wherein the weight ratio between said block copolymers (i)(a) and (i)(b) is such that the overall butadiene content in component (i) is less than 20 wt %, ii. a tackifying resin, and iii. optionally one or more plasticizers. Tapes, labels or bandages that are obtained by applying the adhesive compositions of the present invention to a carrier are also provided.
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