EP0013084A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A reprocessable thermoplastic graft copolymer of propylene polymer and ethylene copolymer, a process for producing the copolymer, electrical wire or cable when insulated by the copolymer, and reprocessable molded articles when formed from the copolymer
Assignee: Union Carbide Corp
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Filing: 1979-11-30
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Granted: —
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Expires: 1999-11-30
Abstract
Abstract 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. These graft copolymers can be used as electrical wire or cable insulation compositions or for forming reprocessable molded articles.
Inventors
- 👤 Amar Amembal
- 👤 Robert Bostwick
- 👤 Richard Gregg Shaw
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 04:57
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: 14
Claim 1
Independent Claim
63 words
A graft copolymer comprising (A) an ethylene copolymer and (B) a propylene polymer characterized in that the propylene polymer is grafted to the 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 > l40 Q C, thereby rendering the graft copolymer reprocessable..
Claim 2
Dependent Claim
63 words
A graft copolymer comprising (A) an ethylene copolymer and (B) a propylene polymer characterized in that the propylene polymer is grafted to the 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 > l40 Q C, thereby rendering the graft copolymer reprocessable..
Claim 3
Dependent Claim
23 words
A graft copolymer as claimed in claim 1 wherein the ethylene copolymer contains from about 60 to about 98 weight percent of ethylene.
Claim 4
Dependent Claim
23 words
A graft copolymer as claimed in claim 2 wherein the ethylene copolymer contains from about 80 to about 90 weight percent of ethylene.
Claim 5
Dependent Claim
23 words
A graft copolymer as claimed in any one of claims 1 to 3 wherein the ethylene copolymer is an ethylene/vinyl acetate copolymer .
Claim 6
Dependent Claim
22 words
A graft copolymer as claimed in any one of claims 1 to 3 wherein the ethylene copolymer is an ethylene/ethyl acrylate copolymer.
Claim 7
Dependent Claim
37 words
A graft copolymer as claimed in any one of the preceding claims 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 8
Dependent Claim
16 words
A graft copolymer as claimed in any one of the preceding claims additionally containing an antioxidant.
Claim 9
Dependent Claim
17 words
A graft copolymer as claimed in any one of the preceding claims additionally containing a carbon black.
Claim 10
Dependent Claim
40 words
A graft copolymer as claimed in any one of the preceding claims containing from about 85 to about 50 percent by weight of the ethylene copolymer and from about 15 to about 50 percent by weight of the propylene polymer.
Claim 11
Dependent Claim
93 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 an ethylene copolymer; (B) from about 15 to 50 percent by weight of a 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 the mixture at a temperature between about 165 0 and 220°C to graft the propylene polymer to the ethylene copolymer.
Claim 12
Dependent Claim
93 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 an ethylene copolymer; (B) from about 15 to 50 percent by weight of a 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 the mixture at a temperature between about 165 0 and 220°C to graft the propylene polymer to the ethylene copolymer.
Claim 13
Dependent Claim
24 words
An electrical wire or cable when insulated with a composition comprising a graft copolymer as claimed in any one of claims 1 to 9.
Claim 14
Dependent Claim
22 words
A reprocessable molded article when formed from or comprising a graft copolymer as claimed in any one of claims 1 to 9.
References Cited (Backward Citations)
FR1307186A
Cited
FR2271640A1
Cited
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