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A thermoplastic elastomer composition comprising 100 by weight of a chlorinated polyethylene, from 5 to 1,000 parts by weight of a crystalline polyolefin resin and from 20 to 1,500 parts by weight of a rubber component, wherein the rubber component is a hydrogenated styrene type rubber or an olefinic rubber which has a Mooney viscosity [ML.sub.1+4 (100.degree. C.)] within a range of from 50 to 350.

Titel:	Thermoplastic elastomer composition
Autor/in / Beteiligte Person:	Mori, Hiroyuki
Link:	View record in USPTO Patent Grants (Volltext)
Veröffentlichung:	2001
Medientyp:	Patent
Sonstiges:	Nachgewiesen in: USPTO Patent Grants Sprachen: English Patent Number: 6,248,834 Publication Date: June 19, 2001 Appl. No: 09/357,954 Application Filed: July 21, 1999 Assignees: Mitsubishi Chemical MKV Company (Tokyo, JPX) Claim: What is claimed is Claim: 1. A thermoplastic elastomer composition comprising 100 parts by weight of a chlorinated polyethylene, from 5 to 1,000 parts by weight of a crystalline polyolefin resin and from 20 to 1,500 parts by weight of a rubber component, wherein the rubber component is an olefinic rubber which has a Mooney viscosity (ML.sub.1+4 (100.degree. C.)) within a range of from 50 to 350. Claim: 2. The thermoplastic elastomer composition according to claim 1, which contains from 1 to 200 parts by weight of a softening agent per 100 parts by weight of the thermoplastic elastomer composition. Claim: 3. The thermoplastic elastomer composition according to claim 1, wherein the chlorinated polyethylene is one obtained by post-chlorinating a polyethylene having a weight average molecular weight of from 100,000 to 750,000 and has a chlorine content of from 20 to 45 wt % and a heat of crystal fusion of from 5 to 35 cal/g as measured by a DSC method. Claim: 4. The thermoplastic elastomer composition according to claim 1, wherein the crystalline polyolefin resin and the rubber component are contained in a weight ratio of 10 to 70:30 to 90. Claim: 5. The thermoplastic elastomer composition according to claim 1, wherein the crystalline polyolefin resin is a crystalline polypropylene resin. Claim: 6. The thermoplastic elastomer composition according to claim 1, wherein the olefinic rubber is an .alpha.-olefin random copolymer rubber made of a random copolymer of ethylene with a C.sub.3-20 a-olefin, having an ethylene content of from 50 to 90 wt %. Claim: 7. A thermoplastic elastomer composition comprising 100 parts by weight of a chlorinated polyethylene, from 5 to 1,000 parts by weight of a crystalline polyolefin resin and from 20 to 1,500 parts by weight of a rubber component, wherein the rubber component is a hydrogenated styrene rubber. Claim: 8. The thermoplastic elastomer composition according to claim 7, which contains from 1 to 200 parts by weight of a softening agent per 100 parts by weight of the thermoplastic elastomer composition. Claim: 9. The thermoplastic elastomer composition according to claim 7, wherein the chlorinated polyethylene is one obtained by post-chlorinating a polyethylene having a weight average molecular weight of from 100,000 to 750,000 and has a chlorine content of from 20 to 45 wt % and a heat of crystal fusion of from 5 to 35 cal/g as measured by a DSC method. Claim: 10. The thermoplastic elastomer composition according to claim 7, wherein the crystalline polyolefin resin and the rubber component are contained in a weight ratio of 10 to 70:30 to 90. Claim: 11. The thermoplastic elastomer composition according to claim 7, wherein the crystalline polyolefin resin is a crystalline polypropylene resin. Claim: 12. The thermoplastic elastomer composition according to claim 7, wherein the hydrogenated styrene rubber is one obtained by hydrogenating a block polymer prepared from styrene or its derivative selected from the group consisting of .alpha.-methylstyrene, 1-vinylnaphthalene, 2-vinylnaphthalene, 3-methylstyrene, 4-propylstyrene, 4-cyclohexylstyrene, 4-dodecylstyrene, 2-ethyl-4-benzylstyrene, 4-(phenylbutyl)styrene and a conjugated diene. Current U.S. Class: 525/214; 524/519; 524/527 Current International Class: C08L 2704 Patent References Cited: 5446064 August 1995 Hori et al. ; 5914195 June 1999 Hori et al. Primary Examiner: Yoon, Tae H. Attorney, Agent or Firm: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.

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Thermoplastic elastomer composition