Patent US3886231A successfully refreshed from Google Patents.
US3886231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic compositions containing methacrylonitrile polymer
Assignee: Imperial Chemical Industries Ltd
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Filing: 1973-07-31
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Granted: 1975-05-27
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Expires: 1993-07-31
Abstract
Abstract A thermoplastic composition containing polymethacrylonitrile and polybutadiene which is (1) a graft copolymer comprising a superstrate of a methacrylonitrile polymer and a substrate of a diene rubber, (2) a blend of such a graft copolymer with a compatible resin, or (3) a blend of methacrylonitrile polymer with a compatible graft comprising a substrate of a diene rubber and a superstrate containing for example 45 to 90% (preferably 60 to 85%) molar of acrylonitrile copolymerised with 10 to 55% (preferably 15 to 40%) molar of at least one ethylenically unsaturated monomer.
Inventors
- 👤 Eric Nield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:18
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/18; C08L51/00; C08L51/04; Y; Y10; Y10S; Y10S525/00; Y10S525/942
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
143 words
A THERMOPLASTIC BLEND OF A RESIN WHICH IS A POLYMER CONSISTING ESSENTIALLY OF METHACRYLONITRILE AND O UP TO TOTAL OF 10% MOLAR OF AT LEAST ONE ETHYLENICALLY UNSATURATED MONOMER SELECTED FROM THE GROUP CONSSTING OF ALKENES, CONJUGATED AROMATIC OLEFINS, ESTERS OF ACRYLIC AND METHACRYLIC ACIDS, VINYL ESTERS, AND A COMPATIBLE GRAFT POLYMER HAVING A DIENE RUBBER SUBSTRATE CONTAINING 40 TO 100% MOLAR OF AT LEAST ONE CONJUGATED DIENE MONOMER AND FROM 60 TO 80% MOLAR OF ACRYLONTRILE AND ONE OTHER ETHYLENICALLY UNSATURATED MONOMER COPOLYMERIZABLE THEREWITH AND A SUPERSTRATE WHICH IS AN ACRYLONTRILE POLYMER CONTAINING 60 TO 90% MOLAR OF ACRYLONTRILE AND 40 TO 10% OF AT LEAST ONE ETHYLENICALLY UNSATURATED MONOMER SELECTED FROM THE GROUP CONSISTING OF ALKENES, CONJUGATED AROMATIC OLEFINS, ESTERS OF ACRYLIC AND METHYACRYLIC ACIDS AND VINYL ESTERS, THE BLEND COMPRISING FROM 1% TO 50% BY WEIGHT OF THE DIENE RUBBER.
Claim 2
Dependent Claim
143 words
A THERMOPLASTIC BLEND OF A RESIN WHICH IS A POLYMER CONSISTING ESSENTIALLY OF METHACRYLONITRILE AND O UP TO TOTAL OF 10% MOLAR OF AT LEAST ONE ETHYLENICALLY UNSATURATED MONOMER SELECTED FROM THE GROUP CONSSTING OF ALKENES, CONJUGATED AROMATIC OLEFINS, ESTERS OF ACRYLIC AND METHACRYLIC ACIDS, VINYL ESTERS, AND A COMPATIBLE GRAFT POLYMER HAVING A DIENE RUBBER SUBSTRATE CONTAINING 40 TO 100% MOLAR OF AT LEAST ONE CONJUGATED DIENE MONOMER AND FROM 60 TO 80% MOLAR OF ACRYLONTRILE AND ONE OTHER ETHYLENICALLY UNSATURATED MONOMER COPOLYMERIZABLE THEREWITH AND A SUPERSTRATE WHICH IS AN ACRYLONTRILE POLYMER CONTAINING 60 TO 90% MOLAR OF ACRYLONTRILE AND 40 TO 10% OF AT LEAST ONE ETHYLENICALLY UNSATURATED MONOMER SELECTED FROM THE GROUP CONSISTING OF ALKENES, CONJUGATED AROMATIC OLEFINS, ESTERS OF ACRYLIC AND METHYACRYLIC ACIDS AND VINYL ESTERS, THE BLEND COMPRISING FROM 1% TO 50% BY WEIGHT OF THE DIENE RUBBER.
Claim 3
Dependent Claim
15 words
A blend according to claim 1 in which the resin is a homopolymer of methacrylonitrile.
Claim 4
Dependent Claim
50 words
A blend according to claim 1 in which the resin comprises 90 to 99% molar of units of methacrylonitrile and 10 to 1% molar of units of at least one other ethylenically unsaturated monomer copolymerizable therewith selected from alkenes, aromatic olefines, esters of acrylic and methacrylic acids and vinyl esters.
Claim 5
Dependent Claim
28 words
A blend according to claim 1 in which the superstrate is a homogeneous copolymer of acrylonitrile and a member of the group consisting of styrene and Beta -methylstyrene.
Claim 6
Dependent Claim
16 words
A blend according to claim 1 in which the said other ethylenically unsaturated monomer comprises isobutene.
Claim 7
Dependent Claim
15 words
A thermoplastic blend according to claim 1 in the form of a sheet or molding.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |