Multilayer polymer system comprising at least one engineering thermoplast layer and at least one soft touch composition layer, and compositions to be used therefore

Abstract

Abstract A multilayer polymer composition comprising at least one relatively soft touch layer comprising at least one block copolymer derived from a monovinyl aromatic and a conjugated diene, and at least one layer of relatively hard, rigid thermoplastic which have intimate contact with each other, characterized in that it comprises: (a) at least one relatively soft layer composition comprising (i) a polar engineering thermoplast in an amount of from 5 to 50 wt % (ii) from 0 to 80 wt % of a selectively hydrogenated block copolymer having at least two poly(monovinyl aromatic) blocks and at least one poly(conjugated diene) block, wherein the residual ethylenic unsaturation after hydrogenation is at most 5%, (iii) from 5 to 85 wt % of a selectively hydrogenated block copolymer having at least two poly(monovinyl aromatic) blocks and at least one poly(conjugated diene) block wherein the residual ethylenic unsaturation after hydrogenation is at most 5%, said block copolymer being functionalized by means of introduced polar groups, and (iv) a plasticizer, in an amount of from 0 to 40 wt %, wherein all ingredients amounts relative to the weight of the total soft layer composition and the sum of the respective amounts in the ingredients (i) to (iv) is 100 wt %, and (b) at least one relatively hard, rigid layer, comprising at least a polar engineering thermoplast; and starting soft touch compositions therefor.

Inventors

• 👤 Jean-Michel Mace
• 👤 Jacques Moerenhout

Bibliographic Details