Patent US4180531A successfully refreshed from Google Patents.
US4180531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processible and vulcanizable polar polymers
Assignee: Individual
•
Filing: 1976-11-16
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Granted: 1979-12-25
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Expires: 1996-11-16
Abstract
Abstract A method of promoting peroxide initiated crosslinking of polar polymers whereby the solubility of peroxide vulcanizing agents in these materials is increased. Increased peroxide solubility and/or processibility is accomplished by blending certain ethylene copolymers with these highly polar polymers. The blending of ethylene copolymers with the polar polymers substantially reduces the viscosity of the latter polymers thereby enhancing their processibility.
Inventors
- 👤 Dominic Alia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:11
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/26; C08L23/28; C08L23/286; C08K; C08K5/00; C08K5/04; C08K5/14; C08L23/02; C08L23/04; C08L23/08; C08L23/16; C08L23/32; C08L23/34; C08L27/00; C08L27/02; C08L27/04; C08L27/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
154 words
A processible composition consisting essentially of (i) a saturated polar polymer selected from the group consisting of chlorinated polyethylene, chlorosulfonated polyethylene or poly(vinyl chloride); (ii) at least one ethylene copolymer, solid at 25° C., containing at least 50% by weight of ethylene and up to 50% by weight of one or more organic compounds which are interpolymerizable with ethylene containing a >C═C< ethylene linkage wherein the ethylene copolymer has a density between 0.92 and 0.96 as per ASTM D-792-60T and a Melt Index of 0.2 to 200 g/10 min. as per ASTM D-1238-62T and (iii) at least one peroxide vulcanizing agent, said composition comprising by weight to 100 parts of saturated polar polymer (i), about 10 to 400 parts by weight of ethylene copolymer (ii) and about 0.1 to 10 parts by weight of peroxide vulcanizing agent (iii), and said composition having a crosslinking half-life of about 0.2 to 1.5 minutes at 205° C.
Claim 2
Dependent Claim
154 words
A processible composition consisting essentially of (i) a saturated polar polymer selected from the group consisting of chlorinated polyethylene, chlorosulfonated polyethylene or poly(vinyl chloride); (ii) at least one ethylene copolymer, solid at 25° C., containing at least 50% by weight of ethylene and up to 50% by weight of one or more organic compounds which are interpolymerizable with ethylene containing a >C═C< ethylene linkage wherein the ethylene copolymer has a density between 0.92 and 0.96 as per ASTM D-792-60T and a Melt Index of 0.2 to 200 g/10 min. as per ASTM D-1238-62T and (iii) at least one peroxide vulcanizing agent, said composition comprising by weight to 100 parts of saturated polar polymer (i), about 10 to 400 parts by weight of ethylene copolymer (ii) and about 0.1 to 10 parts by weight of peroxide vulcanizing agent (iii), and said composition having a crosslinking half-life of about 0.2 to 1.5 minutes at 205° C.
Claim 3
Dependent Claim
29 words
The processible composition of claim 1, wherein said composition comprises, about 30 to 300 parts by weight of said ethylene copolymer to 100 parts by weight of polar polymer.
Claim 4
Dependent Claim
29 words
The composition of claim 1, wherein said peroxide vulcanizing agent is present in an amount of about 0.1 to 5.0 parts by weight to 100 parts of polar polymer.
Claim 5
Dependent Claim
58 words
The processible composition of claim 1, wherein said ethylene copolymer (ii) comprises an ethylene-vinyl acetate copolymer comprising the polymerized product of 100 parts by weight of ethylene and about 8 to 100 parts by weight of vinyl acetate and wherein said polymerized product has a melt index of about 1 to 150 g/10 minutes as per ASTM D-1238-62T.
Claim 6
Dependent Claim
29 words
The processible composition of claim 1, wherein said peroxide vulcanizing agent is selected from the group consisting of di-t-butyl peroxide, α,α'-bis-(t-butyl peroxy) diisopropylbenzene, 2,5-dimethyl-2,5-bis-(t-butylperoxy) hexyne-3, 2,5-dimethyl-2,5-bis-(t-butylperoxy)hexane and dicumyl peroxide.
Claim 7
Dependent Claim
30 words
The processible composition of claim 1, wherein said peroxide vulcanizing agent has the formula R'--(OOR).sub.x wherein R' and R are alkyl or substituted alkyl and x is 1 or 2.
Claim 8
Dependent Claim
31 words
The processible composition of claim 1, wherein said saturated polar polymer is chlorosulfonated polyethylene having from about 20 to 50% by weight chlorine and about 0.75 to 1.5% by weight sulfur.
Claim 9
Dependent Claim
20 words
The processible composition of claim 1, wherein said saturated polar polymer is polyvinyl chloride having about 55% by weight chlorine.
Claim 10
Dependent Claim
14 words
The processible composition of claim 1, wherein said saturated polar polymer is chlorinated polyethylene.
Claim 11
Dependent Claim
14 words
The processible composition of claim 1, wherein said saturated polar polymer is chlorosulfonated polyethylene.
Claim 12
Dependent Claim
14 words
The processible composition of claim 1, wherein said saturated polar polymer is polyvinyl chloride.
Claim 13
Dependent Claim
29 words
The processible composition of claim 1, wherein said ethylene copolymer is a copolymer with a monomer selected from the group consisting of bicycloheptadiene, styrene, vinyl acetate or ethyl acrylate.
Claim 14
Dependent Claim
20 words
The processible composition of claim 6, wherein R' and R are alkyl groups of about 4 to 15 carbon atoms.
Claim 15
Dependent Claim
37 words
The processible composition of claim 1, said composition further comprising (iv) an antioxidant in an amount of from about 0.1 to 3.0 parts by weight for 100 parts by weight of the total polymer in the composition.
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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) | 1982-12-24 | 1983-06-25 | 1983-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-24 | 1987-06-25 | 1987-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-24 | 1991-06-25 | 1991-12-25 | $7700.00 | Window Closed / Lapsed |