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US5073597A
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Dynamically vulcanized alloys having two copolymers in the crosslinked phase and a crystalline matrix
Assignee: Advanced Elastomer Systems LP
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Filing: 1989-05-26
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Granted: 1991-12-17
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Expires: 2009-05-26
Abstract
Abstract A dynamically vulcanized alloy composition having improved tensile strength including a first butyl or halogenated butyl rubber-base elastomer and a second EPM and/or EPDM elastomer in a matrix of a crystalline polyolefinic resin, and processes for producing the improved composition.
Inventors
- 👤 Robert C. Puydak
- 👤 Donald R. Hazelton
- 👤 Trazollah Ouhadi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:27
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/16; C08L23/04; C08L23/10; C08L23/18; C08L23/20; C08L23/22; C08L23/26; C08L23/28; C08L23/283; C08L2207/00; C08L2207/04; C08L23/08; C08L23/0807; C08L23/0815
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
68 words
A dynamically vulcanized thermoplastic composition comprising: (a) a primary elastomer consisting of bromobutyl rubber; (b) a secondary elastomer selected from the group consisting of EPM, EPDM and mixtures thereof; and (c) a plastic matrix of a crystalline polyolefin comprising polypropylene; wherein said primary elastomer is substantially fully cured with a peroxide cure system in combination with a maleimide co-agent; and wherein said secondary elastomer is substantially fully cured.
Claim 2
Dependent Claim
68 words
A dynamically vulcanized thermoplastic composition comprising: (a) a primary elastomer consisting of bromobutyl rubber; (b) a secondary elastomer selected from the group consisting of EPM, EPDM and mixtures thereof; and (c) a plastic matrix of a crystalline polyolefin comprising polypropylene; wherein said primary elastomer is substantially fully cured with a peroxide cure system in combination with a maleimide co-agent; and wherein said secondary elastomer is substantially fully cured.
Claim 3
Dependent Claim
16 words
The composition of claim 1 wherein said crystalline polyolefin is a homo or copolymer of polypropylene.
Claim 4
Dependent Claim
11 words
The composition of claim 2, wherein said secondary elastomer is EPDM.
Claim 5
Dependent Claim
12 words
The composition of claim 2, wherein said maleimid co-agent is m-phenylene bismaleimide.
Claim 6
Dependent Claim
27 words
The composition of claim 1, wherein said primary elastomer is from about 10 wt. % to about 90 wt. % based on the weight of the elastomers.
Claim 7
Dependent Claim
27 words
The composition of claim 1, wherein said primary elastomer is from about 40 wt. % to about 60 wt. % based on the weight of the elastomers.
Claim 8
Dependent Claim
27 words
The composition of claim 1, wherein said secondary elastomer is from about 10 wt. % to about 90 wt. % based on the weight of the elastomers.
Claim 9
Dependent Claim
27 words
The composition of claim 1, wherein said secondary elastomer is from about 40 wt. % to about 60 wt. % based on the weight of the elastomers.
Claim 10
Dependent Claim
31 words
The composition of claim 1, wherein said crystalline polyolefin is from about 10 wt. % to about 90 wt. % based on the weight of the elastomers and the crystalline polyolefin.
Claim 11
Dependent Claim
31 words
The composition of claim 1, wherein said crystalline polyolefin is from about 30 wt. % to about 40 wt. % based on the weight of the elastomers and the crystalline polyolefin.
Claim 12
Dependent Claim
27 words
The composition of claim 3, wherein said primary elastomer is from about 10 wt. % to about 90 wt. % based on the weight of the elastomers.
Claim 13
Dependent Claim
27 words
The composition of claim 3, wherein said primary elastomer is from about 40 wt. % to about 60 wt % based on the weight of the elastomers.
Claim 14
Dependent Claim
27 words
The composition of claim 3, wherein said secondary elastomer is from about 10 wt. % to about 90 wt. % based on the weight of the elastomers.
Claim 15
Dependent Claim
27 words
The composition of claim 3, wherein said secondary elastomer is from about 40 wt. % to about 60 wt. % based on the weight of the elastomers.
Claim 16
Dependent Claim
31 words
The composition of claim 3, wherein said crystalline polyolefin is from about 10 wt. % to about 90 wt. % based on the weight of the elastomers and the crystalline polyolefin.
Claim 17
Dependent Claim
31 words
The composition of claim 3, wherein said crystalline polyolefin is from about 30 wt. % to about 40 wt. % based on the weight of the elastomers and the crystalline polyolefin.
Claim 18
Dependent Claim
25 words
The composition of claim 1, wherein said primary elastomer and said secondary elastomer are present in said composition as particles dispersed in said plastic matrix.
References Cited (Backward Citations)
US4130535A
Cited
US4130534A
Cited
US4311628A
Cited
US4480074A
Cited
US4607074A
Cited
US4728692A
Cited
US4801651A
Cited
US4871796A
Cited
US4810752A
Cited
US4873288A
Cited
US4912148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-16 | 1995-06-17 | 1995-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-16 | 1999-06-17 | 1999-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-16 | 2003-06-17 | 2003-12-17 | $7700.00 | Window Closed / Lapsed |