C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 53/02 (2006.01) C08L 23/02 (2006.01) C08L 23/04 (2006.01)
Patent
CA 2270623
The present invention relates to an elastomeric composition, comprising: from 25 % to 75 % by weight of a block copolymer having at least two monoalkenyl arene blocks separated by a hydrogenated conjugated diene block wherein one monoalkenyl arene block is larger than the other monoalkenyl arene block and at least one of the monoalkenyl arene blocks has a number average molecular weight from 6,000 to 12,000, and a monoalkenyl arene content from 13 to 24 wt.%; from 12 % to 60 % by weight of a polyolefin; and from 13 to 28 % by weight of a tackifying resin; wherein the melt flow rate of the composition is at least 1 g/10 min at 230 ~C/5 kg. The present invention further relates to elastic fibers or films containing the said composition.
La présente invention se rapporte à une composition élastomère comprenant entre 25 et 75 % en poids d'un copolymère séquencé ayant au moins deux blocs monoalcénylarènes séparés par un bloc diène conjugué hydrogéné, l'un des blocs monoalcénylarènes étant plus grand que l'autre, et au moins l'un des blocs monoalcénylarènes ayant un poids moléculaire moyen en nombre compris entre 6000 et 12000 et une teneur monoalcénylarène comprise entre 13 et 24 % en poids; entre 12 et 60 % en poids d'une polyoléfine; et entre 13 et 28 % en poids d'une résine collante. L'indice de fluage de ladite composition est au moins de 1 g/10 min à 230 ·C/5 kg. La présente invention se rapporte aussi à des fibres ou films élastiques contenant ladite composition.
Djiauw Lie Khong
Modic Michael John
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Shell Internationale Research Maatschappij B.v.
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