Thermoplastic elastomer laminates and glass run channels molded therefrom

• US 5,378,543 A
• Filed: 12/13/1993
• Issued: 01/03/1995
• Est. Priority Date: 04/22/1991
• Status: Expired due to Term

• Current Assignee: Mitsui Chemicals Incorporated (Mitsui Chemicals)
• Original Assignee: Mitsui Petrochemical Industries, Ltd.
• Inventors: Murata, Kazuhiko, Sakamaki, Noboru, Murakami, Norishige, Muraoka, Kyooji
• Primary Examiner(s): Buffalow, Edith
• Application Number:
  US08/165,646
• Time in Patent Office: 386 Days
• Field of Search: 428/517, 428/519, 428/516, 428/122, 524/269
• US Class Current: 428/517
• CPC Class Codes: B32B 25/08 of synthetic resin
• CPC Class Codes: B32B 2605/003 Interior finishings
• CPC Class Codes: B32B 27/18 characterised by the use of special additives
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 3/30 characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs apertured layer B32B3/266; layer with cavities or internal voids B32B3/26
• CPC Class Codes: C08L 2205/02 containing two or more polymers of the same C08L -group
• CPC Class Codes: C08L 2205/035 containing four or more polymers in a blend
• CPC Class Codes: C08L 2207/068 Ultra high molecular weight polyethylene
• CPC Class Codes: C08L 23/06 Polyethene
• CPC Class Codes: C08L 23/10 Homopolymers or copolymers of propene
• CPC Class Codes: C08L 23/16 Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
• CPC Class Codes: C08L 23/22 Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefins
• CPC Class Codes: C08L 2312/00 Crosslinking
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/06 Homopolymers or copolymers of unsaturated hydrocarbons; Derivatives thereof
• CPC Class Codes: C08L 2666/24 Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
• CPC Class Codes: C08L 51/06 grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
• CPC Class Codes: C08L 91/00 Compositions of oils, fats or waxes; Compositions of derivatives thereof
• CPC Class Codes: Y10T 428/24198 Channel-shaped edge component [e.g., binding, etc.]
• CPC Class Codes: Y10T 428/31833 Next to aldehyde or ketone condensation product or addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31913 : Monoolefin polymer
• CPC Class Codes: Y10T 428/31917 : Next to polyene polymer
• CPC Class Codes: Y10T 428/31924 : Including polyene monomers

Abstract

According to the present invention, there is provided a thermoplastic elastomer laminate which comprises

a layer comprising a thermoplastic elastomer (A) composed of a crystalline polyolefin and a rubber, and

a layer comprising an ultra-high molecular weight polyolefin (B) or an ultra-high molecular weight polyolefin composition.

In addition, a glass run channel composed of the thermoplastic elastomer laminate is also provided in the invention.

Claims

1. A thermoplastic elastomer laminate which comprises

a layer comprising a graft-modified thermoplastic elastomer (GA) and

a layer comprising an ultra-high molecular weight polyolefin (B),

said graft-modified thermoplastic elastomer (GA) being obtained by dynamic heat treatment and partial cross-linking of a blend in the presence of an organic peroxide,

said blend containing

(i) 95--10 parts by weight of a peroxide cross-linking olefin copolymer rubber,

(ii) 5-90 parts by weight of a polyolefin (the sum total of the (i) and (ii) components is 100 parts by weight) and

(iii) 0.01-10 parts by weight of an α

,β

-unsaturated carboxylic acid or its derivatives, or an unsaturated epoxy monomer.

4. The thermoplastic elastomer laminate according to claim 1 wherein said ultra-high molecular weight polyolefin (B) has an intrinsic viscosity [η

], as measured in decalin at 135°

C., of 10-40 dl/g.

2. The thermoplastic elastomer laminate according to claim 1wherein the graft-modified thermoplastic elastomer (GA) further contains

(iv) 5-100 parts by weight of a peroxide non-cross linking rubbery substance and/or

(v) 3-100 parts by weight of a mineral oil softener based on 100 parts by weight of the sum total of the components (i) and (ii).

3. The thermoplastic elastomer laminate according to claim 2 wherein the content of said peroxide cross-linking olefin copolymer rubber (i) is 95--60 parts by weight and that of said polyolefin (ii) is 5-40 parts by weight (the sum total of the components (i) and (ii) is 100 parts by weight).

5. A thermoplastic elastomer laminates which comprises

a layer comprising a graft-modified thermoplastic elastomer (GA) and

a layer comprising an ultra-high molecular weight polyolefin composition (C),

said graft-modified thermoplastic elastomer (GA) being obtained by dynamic heat treatment and partial cross-linking of a blend in the presence of an organic peroxide,

said blend containing

(i) 95--10 parts by weight of a peroxide cross-linking olefin copolymer rubber,

(ii) 5-90 parts by weight of a polyolefin (the sum total of the (i) and (ii) components is 100 parts by weight) and

(iii) 0.01-10 parts by weight of an α

,β

-unsaturated carboxylic acid or its derivatives, or an unsaturated epoxy monomer,

said ultra-high molecular weight polyolefin composition (C) consisting essentially of an ultra-high molecular weight polyolefin having an intrinsic viscosity [η

], as measured in decalin at 135°

C., of 10-40 dl/g, and a polyolefin having an intrinsic viscosity [η

], as measured in decalin at 135°

C., of 1-5 dl/g,

said ultra-high molecular weight polyolefin existing in a proportion of 15-40% by weight based on 100% by weight of the sum total of the ultra-high molecular weight polyolefin and polyolefin, and

said ultra-high molecular weight polyolefin composition (C) having an intrinsic viscosity [η

], as measured in decalin at 135°

C., of 3.5-8.3 dl/g.

6. The thermoplastic elastomer laminate according to claim 5 wherein the graft-modified thermoplastic elastomer (GA) further contains

(iv) 5-100 parts by weight of a peroxide non-cross linking rubbery substance and/or

(v) 3-100 parts by weight of a mineral oil softener based on 100 parts by weight of the sum total of the components (i) and (ii).

7. The thermoplastic elastomer laminate according to claim 5 wherein the content of said peroxide cross-linking olefin copolymer rubber (i) is 95--60 parts by weight and that of said polyolefin (ii) is 5-40 parts by weight (the sum total of the components (i) and (ii) is 100 parts by weight).

8. The thermoplastic elastomer laminate according to claim 5 wherein said ultra-high molecular weight polyolefin composition (C) contains 1-20% by weight, based on the composition (C), of a liquid or solid lubricant.