US3900531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft of acrylonitrile, n-aryl maleimide and alkene unto a diene substrate
Assignee: Imperial Chemical Industries Ltd
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Filing: 1974-01-28
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Granted: 1975-08-19
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Expires: 1994-01-28
Abstract
Abstract Graft copolymers comprising a substrate of a diene rubber and a superstrate containing a high proportion of copolymerised acrylonitrile, and blends of such graft copolymers with polymers containing a high proportion of acrylonitrile units.
Inventors
- 👤 Carl Fraser Mathews
- 👤 Eric Nield
- 👤 John Brewster Rose
- 👤 Peter Incledon Vincent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:31
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/18; C08L33/20; C08F; C08F279/00; C08F279/02; C08L51/00; C08L51/04; Y; Y10; Y10S; Y10S525/00; Y10S525/942
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
86 words
A GRAFT COPOLYMER COMPRISING I. A SUBSTRATE OF A DIENE RUBBER CONTAINING 40 TO 100% MOLAR OF AT LEAST ONE CONJUGATED 1,3-DIENE MONOMER AND FROM 0 TO 60% MOLAR OF AT LEAST ONE ETHYLENICALLY UNSATURATED MONOMER COPOLYMERISABLE THEREWITH USING FREE RADICAL CATALYST AND II. A SUPERSTRATE, WHICH CONTAINS FROM 45 TO 90% MOLAR OF UNITS FFROM 1% TO 20% MOLAR OF UNITS OF AT LEAST ONE N-ARYL MALEIMIDE AND FROM 5 TO 35% MOLAR OF UNITS OF AT LEAST ONE ALKENE CONTAINING 2 TO 18 ATOMS,
Claim 2
Dependent Claim
86 words
A GRAFT COPOLYMER COMPRISING I. A SUBSTRATE OF A DIENE RUBBER CONTAINING 40 TO 100% MOLAR OF AT LEAST ONE CONJUGATED 1,3-DIENE MONOMER AND FROM 0 TO 60% MOLAR OF AT LEAST ONE ETHYLENICALLY UNSATURATED MONOMER COPOLYMERISABLE THEREWITH USING FREE RADICAL CATALYST AND II. A SUPERSTRATE, WHICH CONTAINS FROM 45 TO 90% MOLAR OF UNITS FFROM 1% TO 20% MOLAR OF UNITS OF AT LEAST ONE N-ARYL MALEIMIDE AND FROM 5 TO 35% MOLAR OF UNITS OF AT LEAST ONE ALKENE CONTAINING 2 TO 18 ATOMS,
Claim 3
Dependent Claim
22 words
A graft copolymer according to claim 1 in which the superstrate contains from 1 to 10% molar of units from N-aryl maleimide.
Claim 4
Dependent Claim
22 words
A graft copolymer according to claim 1 in which the superstrate contains from 15 to 30% molar of units from said alkene.
Claim 5
Dependent Claim
15 words
A graft copolymer according to claim 1 in which the diene rubber substrate is polybutadiene.
References Cited (Backward Citations)
US3766142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |