| 简介 |
A multilayer polymer composition, comprising at least one relatively soft touch layer comprising at least one block copolymer, derived from a monovinyl aromatic monomer and a conjugated diene monomer, and at least one layer of a relatively hard, rigid thermoplastic, which have intimate contact with each other, characterised in that : (a) the relatively soft touch layer comprises a block copolymer composition comprising (i) a polar engineering thermoplast in an amount of from 1 to 50 wt%, (ii) an amount of from 0 to 80 wt% of a selectively hydrogenated block copolymer, having at least two poly(predominantly monovinyl aromatic) blocks and at least one poly(predominantly conjugated diene) block, wherein the residual ethylenic unsaturation after hydrogenation being at most 5%, (iii) an amount of from 5 to 85 wt% of a selectively hydrogenated block copolymer, having at least two poly(predominantly monovinyl aromatic) blocks and at least one poly(predominantly conjugated diene) block wherein the residual ethylenic unsaturation after hydrogenation being at most 5%, said block copolymer being functionalised by means of introduced polar groups, (iv) a plasticizer, in an amount of from 0 to 50 wt%, all ingredients amounts relative to the weight of the total block copolymer composition and the sum of the respective amounts in the ingredients (i) - (iv) being 100 wt%; and (b) the relatively hard, rigid layer, comprising a polar engineering thermoplast; and starting soft touch layer block copolymer compositions therefor. |
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