Espumu00e1veis espumados compositions, articles, and pre mixes for the preparation of compositions espumu00e1veis

摘要

"Espumu00e1veis espumados compositions, articles, and pre mixes for the preparation of compositions espumu00e1veis".Espumu00e1veis compositions which are usable in the manufacture of articles of thermoplastic elastomeric, heat resistant, flexible, espumados, and comprising at least: (a) 100 parts by weight.One or more selectively hydrogenated block copolymer, having at least the blocks the resinous of sandy monovinu00edlico predominantly polymerized, not hydrogenated.And a selectively hydrogenated elastomeric block B, in which the block B before hydrogenation is predominantly a conjugated diene or polymerized dienes.The block copolymer having an apparent molecular weight of at least 250 kg / mol and containing blocks of sandy monovinu00edlico polymerized molecular weight true of at least 18 kg / mol,(b) 5 to 50, preferably from 15 to 40 parts by weight.One or more selectively hydrogenated block copolymers having at least two blocks to 39 resinous of sandy monovinu00edlico predominantly polymerized, not hydrogenated.And a block B 39 elastomeric selectively hydrogenated.In this block B 38 before hydrogenation was derived from a conjugated diene or dienes polymerized as a main component that can be mixed with minor proportions of other glass.Lu00edmeros (e.g., vinyl aromatic), that is, 243 25% by weight, and the block copolymer having an apparent molecular weight in the range of 50000 total 180.000, while the blocks to 39 resinous shows a molecular weight in the range of 3 real 20 kg / mol, preferably 5 to 15 kg / mol, (c) of 25 to 80 parts by weight.A linear crystalline propylene polymer comprising as a main component, having a Vicat softening temperature in the range of 130 398 C 180 198 C and a MFR in the range 0.5 to 30 dg / min and an index of polidispersividade of at least 4.5, (d) of 100 to 250 parts by weight of a softener compatible with blocks B and B 39 , (E) from 0.01 to 3% by weight,With respect to the weight (s) component (s) primary (s) (a) to (E) of a nucleation agent chemical solid in the endothermic group in combination with a blowing agent, and.(f) optionally one or more secondary components selected PPO and / or any resins compatible with the component (a) of the block copolymer, antioxidants, UV stabilisers.Flame retardants, change agents and surface inorganic fillers, and articles espumados derived from such compositions.