US4358355A
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Four component amide copolymer
Assignee: Orica Ltd
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Filing: 1981-09-02
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Granted: 1982-11-09
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Expires: 2001-09-02
Abstract
Abstract Polymeric material comprising at least four polymeric constituents which comprise mer units of the following types: I acrylamide or derivatives thereof II acrylonitrile or derivatives thereof III acrylic acid and esters, or derivatives thereof IV alkylol, sulphonyl or phosphonyl derivatives of I. The polymeric materials are useful as components of water bearing systems which are in the form of gels or suspensions.
Inventors
- 👤 Georgina Kalu
- 👤 Michael Markus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:19
CPC Classifications
C; C06; C06B; C06B47/00; C06B47/14; C08; C08F; C08F220/00; C08F220/02; C08F220/52; C08F220/54; C08F220/56
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
118 words
A water-soluble copolymer consisting essentially of: (a) from 65.0 to 98.5 mole percent of repeating units of formula I ##STR10## (b) from 0.5 to 10.0 mole percent of repeating units of formula II ##STR11## (c) from 0.5 to 4.0 mole percent of repeating units of formula III ##STR12## (d) from 0.5 to 25.0 mole percent of repeating units of formula IV ##STR13## wherein in the formulae R 1 , R 2 , R 3 , R 4 and D are independently chosen from hydrogen, C 1 to C 6 alkyl and C 1 to C 6 hydroxyalkyl; A is chosen from hydrogen and C 1 to C 6 alkyl; and E is C 1 to C 6 hydroxyalkyl.
Claim 2
Dependent Claim
118 words
A water-soluble copolymer consisting essentially of: (a) from 65.0 to 98.5 mole percent of repeating units of formula I ##STR10## (b) from 0.5 to 10.0 mole percent of repeating units of formula II ##STR11## (c) from 0.5 to 4.0 mole percent of repeating units of formula III ##STR12## (d) from 0.5 to 25.0 mole percent of repeating units of formula IV ##STR13## wherein in the formulae R 1 , R 2 , R 3 , R 4 and D are independently chosen from hydrogen, C 1 to C 6 alkyl and C 1 to C 6 hydroxyalkyl; A is chosen from hydrogen and C 1 to C 6 alkyl; and E is C 1 to C 6 hydroxyalkyl.
Claim 3
Dependent Claim
43 words
A copolymer according to claim 1 wherein said repeating units of formula III comprise two sub-types of formulae IIIA ##STR14## and IIIB ##STR15## wherein R 3A and R 3B may be the same or different and D 1 and D 2 are different.
Claim 4
Dependent Claim
20 words
A copolymer according to claim 1 wherein said R 1 , R 3 and R 4 radicals are the same.
Claim 5
Dependent Claim
20 words
A copolymer according to claim 1 wherein the repeating units of formula I type are the mer units of poly(acrylamide).
Claim 6
Dependent Claim
20 words
A copolymer according to claim 1 wherein the repeating units of formula II type are the repeating units of poly(acrylonitrile).
Claim 7
Dependent Claim
34 words
A copolymer according to claim 1 wherein the repeating units of formula III type are of a type selected from the repeating units of the group of polymers consisting of poly(acrylic acid) and poly(hydroxyethylmethacrylate).
Claim 8
Dependent Claim
36 words
A copolymer according to claim 2 wherein the repeating units of formula IIIA type are the mer units of poly(acrylic acid) and the repeating units of the formula IIIB type are the repeating units of poly(hydroxyethylmethacrylate).
Claim 9
Dependent Claim
21 words
A copolymer according to claim 1 which comprises from 80.0 to 95.0 mole percent of a repeating unit of formula I.
Claim 10
Dependent Claim
21 words
A copolymer according to claim 1 which comprises from 1.0 to 5.0 mole percent of a repeating unit of formula II.
Claim 11
Dependent Claim
21 words
A copolymer according to claim 1 which comprises from 1.0 to 3.5 mole percent of a repeating unit of formula III.
Claim 12
Dependent Claim
21 words
A copolymer according to claim 1 which comprises from 1.0 to 12.0 mole percent of a repeating unit of formula IV.
Claim 13
Dependent Claim
57 words
A water soluble copolymer comprising (a) from 80.0 to 95.0 mole percent of repeating units of formula ##STR16## (b) from 1.0 to 5.0 mole percent of repeating units of formula ##STR17## (c) from 0.5 to 3.5 mole percent of repeating units of formulae ##STR18## (d) from 1.0 to 12.0 mole percent of repeating units of formula ##STR19##
Claim 14
Dependent Claim
57 words
A water soluble copolymer comprising (a) from 80.0 to 95.0 mole percent of repeating units of formula ##STR16## (b) from 1.0 to 5.0 mole percent of repeating units of formula ##STR17## (c) from 0.5 to 3.5 mole percent of repeating units of formulae ##STR18## (d) from 1.0 to 12.0 mole percent of repeating units of formula ##STR19##
Claim 15
Dependent Claim
19 words
A copolymer according to claim 1 selected from the group consisting of random copolymers, block copolymers and graft copolymers.
Claim 16
Dependent Claim
82 words
A process for the preparation of a copolymer as defined according to claim 1 which process comprises either: (a) copolymerizing an appropriate mixture of monomers; or (b) copolymerizing a mixture of monomers to give a precursor copolymer comprising at least the repeating units of formula I and formula II, as defined according to claim 34, and modifying said precursor copolymer by graft copolymerization or chemical treatment to introduce repeating units of formula III and formula IV, as defined according to claim 1.
Claim 17
Dependent Claim
27 words
A process according to claim 14 wherein said chemical treatment is effected by a method selected from the group of methods consisting of hydrolysis, esterification, hydroxy-alkylation, amination.
Claim 18
Dependent Claim
22 words
A process according to claim 14 wherein said graft polymerisation is effected by using a chemical free radical initiator or radiation initiation.
References Cited (Backward Citations)
GB998188A
Cited
GB1183456A
Cited
GB1260354A
Cited
GB1312494A
Cited
GB1396531A
Cited
US3873487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-08 | 1986-05-10 | 1986-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-08 | 1990-05-10 | 1990-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-08 | 1994-05-10 | 1994-11-09 | $7700.00 | Window Closed / Lapsed |