초록

Also claimed is a process for the preparation of such articles.

대표청구항 ▼

[ What is claimed is:] [1.] An article comprising a film having a discontinuous phase of open and closed cells and a continuous organic phase comprising:(a) one or more block copolymer(s) corresponding to the Formula I: EQU A--B--X.sub.m --(B--A).sub.n (I) rein each A is a polymer block derived from

[ What is claimed is:] [1.] An article comprising a film having a discontinuous phase of open and closed cells and a continuous organic phase comprising:(a) one or more block copolymer(s) corresponding to the Formula I: EQU A--B--X.sub.m --(B--A).sub.n (I) rein each A is a polymer block derived from one or more monovinylidene aromatic monomers, each B is a polymer block derived from one or more conjugated dienes, X is the remnant of a multifunctional coupling agent, m is 0 or 1, and n is an integer from 1 to 5, each A polymer block has a weight average molecular weight from 4,000 to 20,000 Daltons, each B polymer block has a weight average molecular weight from 20,000 to 100,000 Daltons, wherein the block copolymers are optionally hydrogenated such that a portion of the residual olefinic unsaturation derived from the conjugated dienes is eliminated and the hydrogenated conjugated diene block contains sufficient branching such that the block copolymer is elastomeric; and(b) optionally, an extender which is compatible with the B polymer block, wherein the organic phase contains from about 5 to about 30 percent by weight of units derived from monovinylidene aromatic monomers and the effective phase volume of the A polymer block in the organic phase is from about 5 to about 20 percent.