US3887653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of graft copolymers, the substrates of which contain allyl derivatives of maleic acid and maleic acid anhydride
Assignee: Nippon Shokubai Co Ltd
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Filing: 1972-11-28
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Granted: 1975-06-03
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Expires: 1992-11-28
Abstract
Abstract A process for the preparation of graft copolymer which comprises graft-copolymerizing at least one ethylenically unsaturated monomer (C) to a substratum polymer (AB) having pendant double bond, said substratum polymer (AB) being prepared from at least one comonomer (A) expressed by the following general formula WHEREIN X is -OH, -O-CH2-CH2-OH, -O-CH2-CH(CH3)-OH, -O-CH(CH3)CH2-OH, -O-CH2-CH2-NH2 or -NH2, and at least one ethylenically unsaturated monomer (B).
Inventors
- 👤 Kunio Konishi
- 👤 Tsuneo Tsubakimoto
- 👤 Masao Nikki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:22
CPC Classifications
C; C08; C08F; C08F263/00; C08F263/06; C08F267/00; C08F267/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
44 words
A process for the preparation of graft copolymers which comprises graft-copolymerizing styrene to substratum polymer (AB) having pendent double bonds, said substratum polymer (AB) being prepared from 0.1 to 20.0% by weight of at least one comonomer (A) expressed by the following general formula
Claim 2
Dependent Claim
44 words
A process for the preparation of graft copolymers which comprises graft-copolymerizing styrene to substratum polymer (AB) having pendent double bonds, said substratum polymer (AB) being prepared from 0.1 to 20.0% by weight of at least one comonomer (A) expressed by the following general formula
Claim 3
Dependent Claim
44 words
A PROCESS FOR THE PREPARATION OF GRAFT COPOLYMERS WHICH COMPRISES GRAFT-COPOLYMERIZING STYRENE TO SUBSTRATUM POLYMER (AB) HAVING PENDENT DOUBLE BONDS, SAID SUBSTRATUM POLYMER (AB) BEING PREPARED FROM 0.1 TO 20.0% BY WEIGHT OF AT LEAST ONE COMONOMER (A) EXPRESSED BY THE FOLLOWING GENERAL FORMULA
Claim 4
Dependent Claim
44 words
A PROCESS FOR THE PREPARATION OF GRAFT COPOLYMERS WHICH COMPRISES GRAFT-COPOLYMERIZING STYRENE TO SUBSTRATUM POLYMER (AB) HAVING PENDENT DOUBLE BONDS, SAID SUBSTRATUM POLYMER (AB) BEING PREPARED FROM 0.1 TO 20.0% BY WEIGHT OF AT LEAST ONE COMONOMER (A) EXPRESSED BY THE FOLLOWING GENERAL FORMULA
Claim 5
Dependent Claim
19 words
A process as set forth in claim 1 wherein comonomer (A) is monoallyl maleate expressed by the following formula
Claim 6
Dependent Claim
18 words
A process as set forth in claim 1 wherein the substratum polymer (AB) is prepared by emulsion polymerization.
Claim 7
Dependent Claim
26 words
A process as set forth in claim 1 wherein the substratum polymer (AB) is prepared by emulsion polymerization conducted in the presence of a seed latex.
References Cited (Backward Citations)
US2958673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |