US4851468A
Expired / Lapsed
US
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Dynamically cured thermoplastic olefin polymers
Assignee: Advanced Elastomer Systems LP
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Filing: 1988-02-23
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Granted: 1989-07-25
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Expires: 2008-02-23
Abstract
Abstract Soft, resilient thermoplastic compositions with good physical strength useful as molded parts including hoses, seals and gaskets which exhibit good flow and good surface characteristics in injection molded parts. The compositions comprise ethylene copolymer resin (e.g., ethylene vinyl acetate), halogenated butyl rubber and polychloroprene wherein the rubbers have been dynamically vulcanized to a fully cured state in the presence of the ethylene copolymer resin.
Inventors
- 👤 Donald Hazelton
- 👤 Robert C. Puydak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:19
CPC Classifications
C; C08; C08L; C08L11/00; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/0008; C08K5/0025; C08K5/04; C08K5/09; C08K5/10; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0853; C08L23/26; C08L23/28; C08L23/283; C08L9/00; C08L91/00; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
40 words
A soft, resilient thermoplastic composition comprising a polymer blend wherein the polymer blend comprises ethylene copolymer resin, a halogenated butyl rubber and a polychloroprene rubber, said rubbers being crosslinked by dynamic vulcanization in the presence of the ethylene copolymer resin.
Claim 2
Dependent Claim
40 words
A soft, resilient thermoplastic composition comprising a polymer blend wherein the polymer blend comprises ethylene copolymer resin, a halogenated butyl rubber and a polychloroprene rubber, said rubbers being crosslinked by dynamic vulcanization in the presence of the ethylene copolymer resin.
Claim 3
Dependent Claim
42 words
The composition according to claim 1 wherein said ethylene copolymer resin is selected from the group consisting of copolymers of ethylene with an alpha, beta monoethylenically unsaturated monocarboxylic acid, copolymers of ethylene with an alkyl ester of said acid and mixtures thereof.
Claim 4
Dependent Claim
30 words
The composition according to claim 1 wherein said ethylene copolymer is selected from the group consisting of ethylene vinyl acetate, ethylene methyl acrylate, ethylene butyl acrylate and ethylene ethyl acrylate.
Claim 5
Dependent Claim
14 words
The composition according to claim 1 having a process oil incorporated in the composition.
Claim 6
Dependent Claim
28 words
The composition according to claim 4 wherein the oil is incorporated into the composition at a weight ratio of oil to rubber of about 0.1/1 to about 1.3/1.
Claim 7
Dependent Claim
28 words
The composition according to claim 1 wherein a process oil is incorporated into the composition at about 10 wt% to about 35 wt% based on the overall composition.
Claim 8
Dependent Claim
26 words
The composition according to claim 1 wherein said ethylene copolymer resin, halogenated butyl rubber and polychloroprene are each incorporated into the composition in substantially equal proportions.
Claim 9
Dependent Claim
29 words
The composition according to claim 1 wherein said ethylene copolymer resin comprises a blend of ethylene copolymer resin with a limited amount of at least one optional polyolefin resin.
Claim 10
Dependent Claim
34 words
The composition according to claim 8 wherein the optional polyolefin is selected from the group consisting of high density polyethylene, polypropylene, reactor copolymers of polypropylene, linear low density polyethylene, low density polyethylene, and polybutylene.
Claim 11
Dependent Claim
14 words
The composition according to claim 1 wherein a filler is incorporated into the composition.
Claim 12
Dependent Claim
25 words
The composition according to claim 10 wherein the filler is incorporated into the composition at about 5 to 30 wt% based on the total composition.
Claim 13
Dependent Claim
33 words
The composition according to claim 1 wherein the polymer blend comprises about 40 to about 80 wt% of the overall composition and the remainder of the composition comprises process oil, fillers and curatives.
Claim 14
Dependent Claim
22 words
The composition according to claim 12 wherein the ethylene copolymer resin comprises about 12 to about 35 wt% of the overall composition.
Claim 15
Dependent Claim
26 words
The composition according to claim 12 wherein said ethylene copolymer resin, halogenated butyl rubber and polychloroprene are each incorporated into the composition at substantially equal proportions.
Claim 16
Dependent Claim
21 words
The composition according to claim 1 wherein said halogenated butyl rubber is chlorinated butyl rubber, brominated butyl rubber or blends thereof.
Claim 17
Dependent Claim
23 words
The composition according to claim 1 wherein said halogenated butyl rubber comprises at least 25 wt% based on halogenated butyl rubber plus polychloroprene.
Claim 18
Dependent Claim
21 words
The composition according to claim 1 wherein said polychloroprene comprises at least 35 wt% based on halogenated butyl rubber and polychloroprene.
Claim 19
Dependent Claim
25 words
The composition according to claim 1 wherein said halogenated butyl rubber comprises about 25 to about 65 wt% based on halogenated butyl rubber plus polychloroprene.
Claim 20
Independent Claim
65 words
A method for preparing compatible blends of ethylene copolymer resin and a polychloroprene rubber wherein said polychloroprene rubber is incompatible with said ethylene copolymer resin which comprises blending with said ethylene copolymer resin and polychloroprene rubber a halogenated butyl rubber wherein said halogenated butyl rubber is compatible with said resin said rubbers being co-vulcanized by dynamic vulcanization in the presence of said ethylene copolymer resin.
Claim 21
Independent Claim
65 words
A method for preparing compatible blends of ethylene copolymer resin and a polychloroprene rubber wherein said polychloroprene rubber is incompatible with said ethylene copolymer resin which comprises blending with said ethylene copolymer resin and polychloroprene rubber a halogenated butyl rubber wherein said halogenated butyl rubber is compatible with said resin said rubbers being co-vulcanized by dynamic vulcanization in the presence of said ethylene copolymer resin.
Claim 22
Dependent Claim
27 words
The method according to claim 19 wherein said halogenated butyl rubber comprises at least 25 wt% of the total of said polychloroprene rubber plus halogenated butyl rubber.
Claim 23
Dependent Claim
27 words
The method according to claim 19 wherein said ethylene copolymer resin is ethylene vinyl acetate, ethylene methyl acrylate, ethylene butyl acrylate, ethylene ethyl acrylate or blends thereof.
Claim 24
Dependent Claim
15 words
The method according to claim 19 wherein said halogenated butyl rubber is chlorinated butyl rubber.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-24 | 1993-01-23 | 1993-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-24 | 1997-01-23 | 1997-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-24 | 2001-01-23 | 2001-07-25 | $7700.00 | Window Closed / Lapsed |