Patent US4728692A successfully refreshed from Google Patents.
US4728692A
Expired / Lapsed
US
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Thermoplastic elastomer composition
Assignee: Tonen Chemical Corp
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Filing: 1986-06-16
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Granted: 1988-03-01
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Expires: 2006-06-16
Abstract
Abstract A thermoplastic elastomer composition and process comprising a crystalline polyolefin, halogenated butyl rubber, olefin copolymer rubber, polyolefin modified with, e.g., maleic anhydride, and, optionally nitrile rubber, wherein the halogenated butyl rubber is at least partially crosslinked using a metal oxide and/or chloride, e.g., zinc oxide. Crosslinking is achieved under dynamic mixing conditions and the resulting composition has superior strength, performance and processing properties. Furthermore, use of nitrile rubber imparts improved oil resistance to the composition.
Inventors
- 👤 Eiji Sezaki
- 👤 Takashi Mikami
- 👤 Tsuyoshi Kanai
- 👤 Toshio Yoshida
- 👤 Kikuo Tanaka
- 👤 Masaaki Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:08
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/26; C08L23/02; C08L23/04; C08L23/06; C08L23/08; C08L23/0807; C08L23/0815; C08L23/10; C08L23/16; C08L23/28; C08L23/283; C08L51/00; C08L51/06; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08L2205/00; C08L2205/03; C08L2205/035; C08L2312/00; C08L53/00; C08L9/00; C08L9/02; C08L91/00
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
122 words
A thermoplstic elastomer composition comprising (A) 10 to 90 parts by weight of crystalline polyolefin, (B) 10 to 90 parts by weight of halogenated butyl rubber, with the total amount of (A) and (B) being 100 parts by weight, (C) 10 to 120 parts by weight of olefin copolymer rubber composed of two or more monoolefins or two or more monoolefins and a non-conjugated diene, and (D) 1 to 90 parts by weight of modified polyolefin formed by reaction with an unsaturated carboxylic acid or a derivative thereof and optionally (E) 2 to 50 parts by weight of nitrile rubber, said composition being at least partially crosslinked in the presence of a crosslinking agent of a metal oxide and/or a metal chloride.
Claim 2
Dependent Claim
122 words
A thermoplstic elastomer composition comprising (A) 10 to 90 parts by weight of crystalline polyolefin, (B) 10 to 90 parts by weight of halogenated butyl rubber, with the total amount of (A) and (B) being 100 parts by weight, (C) 10 to 120 parts by weight of olefin copolymer rubber composed of two or more monoolefins or two or more monoolefins and a non-conjugated diene, and (D) 1 to 90 parts by weight of modified polyolefin formed by reaction with an unsaturated carboxylic acid or a derivative thereof and optionally (E) 2 to 50 parts by weight of nitrile rubber, said composition being at least partially crosslinked in the presence of a crosslinking agent of a metal oxide and/or a metal chloride.
Claim 3
Dependent Claim
20 words
The composition of claim 1 wherein said halogenated butyl rubber is chlorinated butyl or brominated butyl rubber or mixtures thereof.
Claim 4
Dependent Claim
22 words
The composition of claim 1 wherein said olefin copolymer rubber is ethylene-propylene copolymer rubber or ethylene-propylene non-conjugated diolefin rubber or mixtures thereof.
Claim 5
Dependent Claim
10 words
The composition of claim 1 wherein said metal is zinc.
Claim 6
Dependent Claim
14 words
The composition of claim 1 wherein said crystalline polyolefin is polypropylene or propylene-ethylene copolymer.
Claim 7
Dependent Claim
20 words
The composition of claim 1 wherein said unsaturated carboxylic acid or derivative is maleic acid, maleic anhydride or endobicyclo-[2.2.1]-5-heptene-2,3-dicarboxylic anhydride.
Claim 8
Dependent Claim
9 words
The composition of claim 4 further comprising magnesium oxide.
Claim 9
Dependent Claim
9 words
The composition of claim 1 further comprising a softener.
Claim 10
Dependent Claim
63 words
The composition of claim 1 wherein component (A) is present at 20 to 70 parts by weight, component (B) is present at 30 to 80 parts by weight, component (C) is present at 10 to 50 parts by weight, component (D) is present at 5 to 50 parts by weight and optional component (E) is present at 5 to 30 parts by weight.
Claim 11
Dependent Claim
29 words
The composition of claim 1 wherein said crosslinking agent is present at 0.2 to 10 parts by weight per hundred parts by weight of components (A) through (E) inclusive.
Claim 12
Dependent Claim
9 words
The composition of claim 1 further comprising inorganic filler.
Claim 13
Dependent Claim
14 words
The composition of claim 1 wherein said olefin copolymer rubber is not substantially crosslinked.
Claim 14
Dependent Claim
10 words
The composition of claim 1 including said optional component (E).
Claim 15
Dependent Claim
160 words
A process for preparing a thermoplastic elastomer composition comprising (A) 10 to 90 parts by weight of crystalline polyolefin, (B) 10 to 90 parts by weight of halogenated butyl rubber, with the total amount of (A) and (B) being 100 parts by weight, (C) 10 to 120 parts by weight of olefin copolymer rubber composed of two or more monoolefins or two or more monoolefins and a non-conjugated diene, and (D) 1 to 90 parts by weight of modified polyolefin formed by reaction with an unsaturated carboxylic acid or a derivative thereof, and optionally (E) 2 to 50 parts by weight of nitrile rubber, wherein said components (A), (B), (C), (D) and when used (E), are brought into mixing contact with one another in the molten state and a crosslinking agent comprising a metal oxide and/or metal chloride is added to said components and mixing in the molten state is continued until at least partial crosslinking of said composition occurs.
Claim 16
Dependent Claim
160 words
A process for preparing a thermoplastic elastomer composition comprising (A) 10 to 90 parts by weight of crystalline polyolefin, (B) 10 to 90 parts by weight of halogenated butyl rubber, with the total amount of (A) and (B) being 100 parts by weight, (C) 10 to 120 parts by weight of olefin copolymer rubber composed of two or more monoolefins or two or more monoolefins and a non-conjugated diene, and (D) 1 to 90 parts by weight of modified polyolefin formed by reaction with an unsaturated carboxylic acid or a derivative thereof, and optionally (E) 2 to 50 parts by weight of nitrile rubber, wherein said components (A), (B), (C), (D) and when used (E), are brought into mixing contact with one another in the molten state and a crosslinking agent comprising a metal oxide and/or metal chloride is added to said components and mixing in the molten state is continued until at least partial crosslinking of said composition occurs.
Claim 17
Dependent Claim
12 words
The process of claim 14 wherein partial crosslinking occurs in component (B).
Claim 18
Dependent Claim
9 words
The process of claim 14 further comprising magnesium oxide.
Claim 19
Dependent Claim
9 words
The process of claim 14 further comprising a softener.
Claim 20
Dependent Claim
9 words
The process of claim 14 further comprising inorganic filler.
Claim 21
Dependent Claim
10 words
The process of claim 14 further comprising optional ingredient (E).
Claim 22
Dependent Claim
53 words
The process of claim 19 wherein component (A) is polypropylene or propylene-ethylene block copolymer, component (B) is chlorinated or brominated butyl rubber, component (C) is ethylene-propylene or ethylene-propylene non-conjugated diolefin rubber, component (D) is modified by reaction with an unsaturated carboxylic acid or a derivative thereof and said crosslinking agent metal is zinc.
Claim 23
Dependent Claim
29 words
The process of claim 14 wherein said cross-linking agent is present at 0.2 to 10 parts by weight per hundred parts by weight of components (A) through (E) inclusive.
Claim 24
Dependent Claim
10 words
The process of claim 20 including said optional component (E).
Claim 25
Dependent Claim
52 words
The composition of claim 1 wherein component (A) is polypropylene or propylene-ethylene copolymer, component (B) is chlorinated or brominated butyl rubber, component (C) is ethylene-propylene or ethylene-propylene non-conjugated diolefin rubber, component (D) is modified by reaction with an unsaturated carboxylic acid or a derivative thereof and said crosslinking agent metal is zinc.
Claim 26
Dependent Claim
10 words
The composition of claim 23 including said optional component (E).
References Cited (Backward Citations)
US3904470A
Cited
US4048261A
Cited
US4130534A
Cited
US4299931A
Cited
JPS56159239A
Cited
US4409365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |