Patent ID: 7268184

Claim:
A composition for the manufacture of fibers, filaments, melt blown or spun bond non-wovens or cast or blown films, comprising (1) at least 50 wt % of a styrenic block copolymer, having a molecular structure according to the general formula S-EB-S(1) or (S-EB) n X(2), wherein each S independently is a polymer block of predominantly styrene and EB is a hydrogenated polymer block of predominantly butadiene, n is an integer equal to or greater than 2, and X is the residue of a coupling agent, having a poly(styrene) content in the range of from 10 to 29 wt %, having poly(styrene) blocks (S) of an apparent molecular weight in the range of from 6,000 to 9,000, having an apparent molecular weight of the complete block copolymer in the range of from 80,000 to 150,000, having an 1,2-addition degree (vinyl content) in the precursor of the poly (butadiene) block (EB) in the range of from 60 to 80% (mole/mole), wherein the block EB has a hydrogenation degree of at least 80%, and wherein diblock S-EB optionally occurs in a content of at most 20 mole %; (2) a polyolefin in an amount of from 10 to 30 wt %; (3) a resin which is compatible with the poly(styrene) blocks selected from coumarone-indene resin, polyindene resin, poly(methyl indene) resin, polystyrene resin, vinyltoluene-alphamethylstyrene resin, alphamethylstyrene resin, and polyphenylene ether in an amount of at least 5 wt %, and (4) a resin which is compatible with the hydrogenated polybutadiene blocks selected from compatible C 5 hydrocarbon resins, hydrogenated C 5 hydrocarbon resins, styrenated C 5 resins, C 5/ C 9 resins, styrenated terpene resins, fully hydrogenated or partially hydrogenated C 9 hydrocarbon resins, rosins esters, rosins derivatives and mixtures thereof in an amount of at least 3 wt %, wherein all weight percentages are relative to the weight of the complete composition.