US4234656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reprocessable thermoplastic graft copolymer of propylene polymer and ethylene copolymer
Assignee: Union Carbide Corp
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Filing: 1978-12-20
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Granted: 1980-11-18
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Expires: 1998-12-20
Abstract
Abstract Reprocessable thermoplastic graft copolymers of propylene polymer and ethylene copolymer are herein described. These graft copolymers are prepared by heating the propylene polymer and ethylene copolymer in the presence of select peroxides in order to graft the propylene polymer onto the ethylene copolymer.
Inventors
- 👤 Amar Amembal
- 👤 Robert Bostwick
- 👤 Richard G. Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:42
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08F; C08F255/00; C08F255/02; C08F255/026; C08K; C08K5/00; C08K5/04; C08K5/14; C08L23/0846; C08L23/0853; C08L23/0869; C08L51/00; C08L51/06; C08L23/10; C08L23/12; C08L2312/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
72 words
A reprocessable graft copolymer comprising (A) ethylene copolymer containing more than 60 weight percent ethylene and at least one comonomer selected from the group consisting of vinyl acetate and alkyl acrylates or methacrylates and (B) propylene polymer grafted to said ethylene copolymer with from about 0.1 to about 0.75 weight percent, based on the weight of (A) and (B), of a peroxide having a half life of one minute at ≧140° C.
Claim 2
Dependent Claim
72 words
A reprocessable graft copolymer comprising (A) ethylene copolymer containing more than 60 weight percent ethylene and at least one comonomer selected from the group consisting of vinyl acetate and alkyl acrylates or methacrylates and (B) propylene polymer grafted to said ethylene copolymer with from about 0.1 to about 0.75 weight percent, based on the weight of (A) and (B), of a peroxide having a half life of one minute at ≧140° C.
Claim 3
Dependent Claim
14 words
A graft copolymer as in claim 1 wherein the ethylene copolymer is ethylene-vinyl acetate.
Claim 4
Dependent Claim
14 words
A graft copolymer as in claim 1 wherein the ethylene copolymer is ethylene-ethyl acrylate.
Claim 5
Dependent Claim
32 words
A graft copolymer as in claim 1 wherein the peroxide is present in an amount of from about 0.20 to about 0.50 weight percent, based on the weight of (A) and (B).
Claim 6
Dependent Claim
10 words
A graft copolymer as in claim 1 which contains antioxidant.
Claim 7
Dependent Claim
11 words
A graft copolymer as in claim 1 which contains carbon black.
Claim 8
Dependent Claim
34 words
A graft copolymer as in claim 1 which contains from about 85 to about 50 percent by weight of ethylene copolymer and from about 15 to about 50 percent by weight of propylene polymer.
Claim 9
Dependent Claim
116 words
A process for producing a reprocessable graft copolymer which comprises forming a mixture comprising (A) from about 85 to 50 percent by weight of ethylene copolymer containing more than 60 weight percent ethylene and at least one comonomer selected from the group consisting of vinyl acetate and alkyl acrylates or methacrylates; (B) from about 15 to 50 percent by weight of propylene polymer; and (C) from about 0.1 to about 0.75 weight percent, based on the weight of (A) and (B), of a peroxide having a half life of one minute at ≧140° C. and heating said mixture at a temperature between about 165° and 220° C. to graft the propylene polymer to said ethylene copolymer.
Claim 10
Dependent Claim
116 words
A process for producing a reprocessable graft copolymer which comprises forming a mixture comprising (A) from about 85 to 50 percent by weight of ethylene copolymer containing more than 60 weight percent ethylene and at least one comonomer selected from the group consisting of vinyl acetate and alkyl acrylates or methacrylates; (B) from about 15 to 50 percent by weight of propylene polymer; and (C) from about 0.1 to about 0.75 weight percent, based on the weight of (A) and (B), of a peroxide having a half life of one minute at ≧140° C. and heating said mixture at a temperature between about 165° and 220° C. to graft the propylene polymer to said ethylene copolymer.
Claim 11
Dependent Claim
86 words
An electrical wire or cable insulated with a graft copolymer containing composition, said graft copolymer being reprocessable and comprising (A) ethylene copolymer containing more than 60 weight percent ethylene and at least one comonomer selected from the group consisting of vinyl acetate and alkyl acrylates or methacrylates and (B) propylene polymer grafted to said ethylene copolymer with from about 0.1 to about 0.75 weight percent, based on the weight of (A) and (B), of a peroxide having a half life of one minute at ≧140° C.
Claim 12
Dependent Claim
86 words
An electrical wire or cable insulated with a graft copolymer containing composition, said graft copolymer being reprocessable and comprising (A) ethylene copolymer containing more than 60 weight percent ethylene and at least one comonomer selected from the group consisting of vinyl acetate and alkyl acrylates or methacrylates and (B) propylene polymer grafted to said ethylene copolymer with from about 0.1 to about 0.75 weight percent, based on the weight of (A) and (B), of a peroxide having a half life of one minute at ≧140° C.
Claim 13
Dependent Claim
76 words
A reprocessable molded article of a graft copolymer comprising (A) ethylene copolymer containing more than 60 weight percent ethylene and at least one comonomer selected from the group consisting of vinyl acetate and alkyl acrylates or methacrylates and (B) propylene polymer grafted to said ethylene copolymer with from about 0.1 to about 0.75 weight percent, based on the weight of (A) and (B), of a peroxide having a half life of one minute at ≧140° C.
Claim 14
Dependent Claim
76 words
A reprocessable molded article of a graft copolymer comprising (A) ethylene copolymer containing more than 60 weight percent ethylene and at least one comonomer selected from the group consisting of vinyl acetate and alkyl acrylates or methacrylates and (B) propylene polymer grafted to said ethylene copolymer with from about 0.1 to about 0.75 weight percent, based on the weight of (A) and (B), of a peroxide having a half life of one minute at ≧140° C.
Claim 15
Dependent Claim
17 words
The graft copolymer of claim 1 wherein the ethylene copolymer contains more than 80 weight percent ethylene.
Claim 16
Dependent Claim
16 words
The process of claim 8 wherein the ethylene copolymer contains more than 80 weight percent ethylene.
Claim 17
Dependent Claim
17 words
The electrical wire of claim 9 wherein the ethylene copolymer comtains more than 80 weight percent ethylene.
Claim 18
Dependent Claim
17 words
The molded article of claim 10 wherein the ethylene copolymer contains more than 80 weight percent ethylene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-18 | 1984-05-19 | 1984-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-18 | 1988-05-19 | 1988-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-18 | 1992-05-19 | 1992-11-18 | $7700.00 | Window Closed / Lapsed |