US4808665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crosslinked blends
Assignee: Advanced Elastomer Systems LP
•
Filing: 1987-10-13
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Granted: 1989-02-28
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Expires: 2007-10-13
Abstract
Abstract Shaped articles are made from blends of rubber and plastic in which the rubber is in the form of discrete vulcanized particles dispersed in the plastic. After shaping the articles, they are exposed to free-radical crosslinking which converts the blends from thermoplastics to thermosets.
Inventors
- 👤 Raman Patel
- 👤 Yun L. Wang
- 👤 Sabet Abdou-Sabet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:33
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C08L21/00; C08L23/16; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/04; C08K5/14; C08L2205/00; C08L2205/03; C08L2312/00; C08L2312/06; C08L61/00; C08L61/04; C08L61/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
98 words
A shaped article comprising a blend of rubber and plastic, wherein the rubber is a homopolymer or copolymer from conjugated diene monomer, or a copolymer of ethylene and propylene with a minor proportion of non-conjugated diene monomer, the rubber is vulcanized with a phenolic curative and is in the form of discrete vulcanized particles dispersed in a continuous phase of the plastic and the plastic is crystalline polymer or copolymer fronm ethylene monomer, the blend having been exposed to free-radical crosslinking after shaping of the article, so as to convert the blend from a thermoplastic to a thermoset.
Claim 2
Dependent Claim
98 words
A shaped article comprising a blend of rubber and plastic, wherein the rubber is a homopolymer or copolymer from conjugated diene monomer, or a copolymer of ethylene and propylene with a minor proportion of non-conjugated diene monomer, the rubber is vulcanized with a phenolic curative and is in the form of discrete vulcanized particles dispersed in a continuous phase of the plastic and the plastic is crystalline polymer or copolymer fronm ethylene monomer, the blend having been exposed to free-radical crosslinking after shaping of the article, so as to convert the blend from a thermoplastic to a thermoset.
Claim 3
Dependent Claim
14 words
The article of claim 1, wherein the rubber was dynamically vulcanized in the blend.
Claim 4
Dependent Claim
17 words
The article of claim 1 wherein the free-radical crosslinking was effected by radiation or an organic peroxide.
Claim 5
Dependent Claim
40 words
The article of claim 1 wherein the blend contains, on a basis of 100 parts by weight of rubber and plastic, from 85 to 15 parts by weight of rubber and from 15 to 85 parts by weight of plastic.
Claim 6
Dependent Claim
44 words
The article of claim 1 wherein the phenolic curative comprised from 1 to 20 parts by weight of a methylol phenolic resin and from 0.5 to 50 parts by weight of activator, including a metal oxide, per 100 parts by weight of the rubber.
Claim 7
Dependent Claim
14 words
The article of claim 2 wherein the blend was crosslinked with a peroxide curative.
Claim 8
Dependent Claim
34 words
The article of claim 6 wherein the peroxide curative was 2,5-dimethyl-2,5-di(t-butylperoxy) hexane, and was present in the amount of from 0.1 to 5.0 parts by weight per 100 parts by weight of the blend.
Claim 9
Dependent Claim
14 words
The article of claim 1 which was shaped by extrusion, thermoforming or injection molding.
Claim 10
Dependent Claim
13 words
The article of claim 1 wherein the non-conjugated diene monomer is ethylidene norbornene.
Claim 11
Dependent Claim
41 words
The article of claim 1, wherein the proportions of rubber to plastic in the blend are from 25 to 75 parts of rubber, and correspondingly, 75 to 25 parts plastic, by weight, based on 100 parts of total rubber and plastic.
References Cited (Backward Citations)
US3256366A
Cited
US3701702A
Cited
US3758643A
Cited
US3989611A
Cited
US4102761A
Cited
US4130535A
Cited
US4104210A
Cited
US4311628A
Cited
US4202801A
Cited
US4264490A
Cited
US4271049A
Cited
US4300988A
Cited
US4348266A
Cited
US4480074A
Cited
US4687810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-28 | 1992-08-29 | 1993-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-28 | 1996-08-29 | 1997-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-28 | 2000-08-29 | 2001-02-28 | $7700.00 | Window Closed / Lapsed |