EP0154453A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Thermoplastic elastomer composition
Assignee: BP PLC
•
Filing: 1985-02-21
•
Granted: —
•
Expires: 2005-02-21
Abstract
Abstract A process for producing a thermoplastic elastomer comprising curing a blend of nitrile rubber and a thermoplastic under dynamic curing conditions. The thermoplastic comprises a copolymer of ethylene and an acrylic or methacrylic ester, e.g. ethylene-ethyl acrylate, and the curing agent is a peroxy curing agent. The compositions are cured by mixing at a temperature above the activation temperature of the curing agent and above the melting point of the thermoplastic copolymer.
Inventors
- 👤 Alan Charles George Aldred
- 👤 Sidney George Fogg
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 16:26
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/02; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0869; C08K; C08K5/00; C08K5/04; C08K5/14; C08L2312/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
75 words
A process for producing a thermoplastic elastomer comprises curing a blend of nitrile rubber and a thermoplastic under dynamic curing conditions characterised in that the blend comprises (A) a nitrile rubber, (B) a copolymer comprising ethylene and an acrylic or methacrylic ester and (C) a peroxy curing agent and is cured by mixing at a temperature above the activation temperature of the peroxy curing agent and above the melting temperature of the ethylene-(meth) acrylate copolymer.
Claim 2
Dependent Claim
75 words
A process for producing a thermoplastic elastomer comprises curing a blend of nitrile rubber and a thermoplastic under dynamic curing conditions characterised in that the blend comprises (A) a nitrile rubber, (B) a copolymer comprising ethylene and an acrylic or methacrylic ester and (C) a peroxy curing agent and is cured by mixing at a temperature above the activation temperature of the peroxy curing agent and above the melting temperature of the ethylene-(meth) acrylate copolymer.
Claim 3
Dependent Claim
30 words
A process as claimed in claim 1 in which the nitrile rubber is a copolymer of butadiene and acrylonitrile having an acrylonitrile content of from 20 to 45% by weight.
Claim 4
Dependent Claim
26 words
A process as claimed in claim 1 or claim 2 in which the copolymer comprises ethylene and C 1 to C 4 alkyl acrylate or methacrylate.
Claim 5
Dependent Claim
16 words
A process as claimed in claim 3 in which the copolymer comprises ethylene and ethyl acrylate.
Claim 6
Dependent Claim
36 words
A process as claimed in any one of claims 1 to 4 in which the weight ratio of the nitrile rubber to the copolymer of ethylene and acrylic or methacrylic ester is from 1:4 to 4:1.
Claim 7
Dependent Claim
31 words
A process as claimed in any one of claims 1 to 5 in which the composition also comprises a thermoplastic polymer selected from the group comprising polyethylene, polypropylene or a polyamide.
Claim 8
Dependent Claim
39 words
A process as claimed in any one of claims 1 to 6 in which the curing temperature is from 130 to 250°C and the blend is mixed at this temperature for a period of from 5 to 30 minutes.
Claim 9
Dependent Claim
17 words
A thermoplastic elastomer obtainable by a process as claimed in any one of claims 1 to 7.
Claim 10
Dependent Claim
19 words
A thermoplastic elastomer as claimed in claim 8 having a melt index of from 0.5 to 15 at 190°C.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.