US4065435A
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Water-soluble polymers and process for producing the same
Assignee: Fujifilm Holdings Corp
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Filing: 1976-06-09
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Granted: 1977-12-27
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Expires: 1996-06-09
Abstract
Abstract Water-soluble oxidation-reduction polymers containing therein recurring units of the formula (I): ##STR1## or recurring units of formula (II): ##STR2## wherein X represents a hydrogen atom, a halogen atom, an alkyl group, an allyl group or an aryl group; R 1 represents a hydrogen atom or an alkyl group; R 2 represents a hydrogen atom, an alkyl group or an aryl group; R 3 represents a divalent group; and M represents a cation. These polymers have excellent oxidation-reduction properties.
Inventors
- 👤 Shinji Sakaguchi
- 👤 Shinichi Imai
- 👤 Junn Yamaguchi
- 👤 Nobuo Tsuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:59
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/392; G03C7/396; C; C08; C08F; C08F8/00; C08F8/30; C08F8/32; G03C1/00; G03C1/005; G03C1/04; G03C1/053
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
139 words
A water soluble homopolymer or copolymer containing in its main chain recurring units of the formula (I): ##STR35## or the formula (II): ##STR36## wherein X represents a hydrogen atom, a halogen atom, an alkyl group, an allyl group or an aryl group; R 1 represents a hydrogen atom or an alkyl group; R 2 represents a hydrogen atom, an alkyl group or an aryl group; R 3 represents a divalent group selected from the group consisting of a straight chain alkylene group having 1 to 8 carbon atoms; a branched chain alkylene group having 1 to 8 carbon atoms; an arylene group and a group having the formula: ##STR37## wherein n is an integer of 1 to 4; and M is selected from the group consisting of a hydrogen atom, an alkali metal atom and a quaternary ammonium group.
Claim 2
Dependent Claim
139 words
A water soluble homopolymer or copolymer containing in its main chain recurring units of the formula (I): ##STR35## or the formula (II): ##STR36## wherein X represents a hydrogen atom, a halogen atom, an alkyl group, an allyl group or an aryl group; R 1 represents a hydrogen atom or an alkyl group; R 2 represents a hydrogen atom, an alkyl group or an aryl group; R 3 represents a divalent group selected from the group consisting of a straight chain alkylene group having 1 to 8 carbon atoms; a branched chain alkylene group having 1 to 8 carbon atoms; an arylene group and a group having the formula: ##STR37## wherein n is an integer of 1 to 4; and M is selected from the group consisting of a hydrogen atom, an alkali metal atom and a quaternary ammonium group.
Claim 3
Dependent Claim
28 words
The polymer as claimed in claim 1, wherein X and R 1 each represents a hydrogen atom or an alkyl group having from 1 to 8 carbon atoms.
Claim 4
Dependent Claim
24 words
The polymer as claimed in claim 1, wherein X and R 1 each represents an alkyl group having from 1 to 4 carbon atoms.
Claim 5
Dependent Claim
17 words
The polymer as claimed in claim 1, wherein X represents a chlorine atom or a bromine atom.
Claim 6
Dependent Claim
13 words
The polymer as claimed in claim 1, wherein X represents a hydrogen atom.
Claim 7
Dependent Claim
21 words
The polymer as claimed in claim 1, wherein R 3 represents an alkylene group having from 1 to 8 carbon atoms.
Claim 8
Dependent Claim
21 words
The polymer as claimed in claim 6, wherein R 3 represents an alkylene group having from 1 to 3 carbon atoms.
Claim 9
Dependent Claim
15 words
The polymer of claim 1, prepared from maleic anhydride, citraconic anhydride or phenyl maleic anhydride.
Claim 10
Dependent Claim
124 words
A process for producing the water-soluble polymers as claimed in claim 1, comprising reacting a hydroquinone compound of the formula (III) ##STR38## wherein X represents a hydrogen atom, a halogen atom, an alkyl group or an aryl group; R 1 represents a hydrogen atom or an alkyl group; and R 3 represents a divalent group selected from the group consisting of a straight chain alkylene group having 1 to 8 carbon atoms; a branched chain alkylene group having 1 to 8 carbon atoms; an arylene group and a group having the formula: ##STR39## wherein n is an integer of 1 to 4 or a salt thereof; with a homopolymer or copolymer containing in its main chain the recurring units of the formula (IV): ##STR40##
Claim 11
Dependent Claim
26 words
The process of claim 9, wherein said polymer having recurring units of the formula (IV) is prepared from maleic anhydride, citraconic anhydride or phenyl maleic anhydride.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-26 | 1981-06-27 | 1981-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-26 | 1985-06-27 | 1985-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-26 | 1989-06-27 | 1989-12-27 | $7700.00 | Window Closed / Lapsed |