US3856755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oligomers and/or polymers containing carboxylic and hydroxylic groups, and process for making them
Assignee: Hoechst AG
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Filing: 1972-12-20
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Granted: 1974-12-24
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Expires: 1992-12-20
Abstract
Abstract in which X, Y and Z stand for a hydrogen and/or halogen atom with the proviso that at least one of the X, Y and Z substituents stands for a halogen atom, R stands for a carboxyhalide radical, a carboxylic group, ester group, nitrile group or anhydride group, and the mole fraction m stands for a number greater than zero and smaller than 1. The invention provides novel oligomers and/or polymers containing carboxylic and hydroxylic groups - the latter groups being partially lactonized, if desired - and a predominant proportion of C-C bonds in their principal chain. The oligomers and/or polymers are produced by hydrolyzing halogenated copolymers which have substantially between 5 and 60 weight % of halogen therein and a principal chain based on structural units, in any desirable sequential arrangement, of the following general formulae I and II or I and III
Inventors
- 👤 W Vogt
- 👤 E Fischer
- 👤 E Auer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:12
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/14; C08F8/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
126 words
POLYMER COMPLEX FORMERS AND SEQUESTERING AGENTS FOR POLYVALENT METAL IONS WHICH ARE THE HYDROLYSATES OF HALOGENATED COPOLYMERS, THE SAID HYDROLYSATES CONTAINING SUBSTANTIALLY BETWEEN 51 TO 77 WEIGHT % OF FREE OR LACTONIZED CARBOXYLIC GROUPS, SUBSTANTIALLY BETWEEN 1 AND 29.5 WEIGHT % OF FREE OR LACTONIZED HYDROLYLIC GROUPS, AND HAVING A SPECIFIC VSOCOSITY SUBSTANTIALLY BETWEEN 0.1 AND 2.0 DETERMINED ON A 1 WEIGHT % SOLUTION IN DIMETHYL FORMAMIDE AT 25*C THE HALOGENATED COPOLYMERS HAVING SUBSTANTIALLY BETWEEN 5 AND 60 WEIGHT % OF HALOGEN THEREN A RELATIVE VISCOSITY SUBSTANTIALLY BETWEEN 0.1 AND 5, DETERMINED ON A 4 WEIGHT % AQUEOUS SOLUTION AT 25*C AND A PRINCIPAL CHAIN BASED ON STRUCTURAL UNITS, IN ANY DESIRABLE SEQUENTIAL ARRANGE,ENT OF THE FOLLOWING GENERAL FORMULAE I AND II OR I AND III
Claim 2
Dependent Claim
126 words
POLYMER COMPLEX FORMERS AND SEQUESTERING AGENTS FOR POLYVALENT METAL IONS WHICH ARE THE HYDROLYSATES OF HALOGENATED COPOLYMERS, THE SAID HYDROLYSATES CONTAINING SUBSTANTIALLY BETWEEN 51 TO 77 WEIGHT % OF FREE OR LACTONIZED CARBOXYLIC GROUPS, SUBSTANTIALLY BETWEEN 1 AND 29.5 WEIGHT % OF FREE OR LACTONIZED HYDROLYLIC GROUPS, AND HAVING A SPECIFIC VSOCOSITY SUBSTANTIALLY BETWEEN 0.1 AND 2.0 DETERMINED ON A 1 WEIGHT % SOLUTION IN DIMETHYL FORMAMIDE AT 25*C THE HALOGENATED COPOLYMERS HAVING SUBSTANTIALLY BETWEEN 5 AND 60 WEIGHT % OF HALOGEN THEREN A RELATIVE VISCOSITY SUBSTANTIALLY BETWEEN 0.1 AND 5, DETERMINED ON A 4 WEIGHT % AQUEOUS SOLUTION AT 25*C AND A PRINCIPAL CHAIN BASED ON STRUCTURAL UNITS, IN ANY DESIRABLE SEQUENTIAL ARRANGE,ENT OF THE FOLLOWING GENERAL FORMULAE I AND II OR I AND III
Claim 3
Dependent Claim
82 words
The polymer complex formers and sequestering agents as claimed in claim 1, the said polymers being the hydrolysates of halogenated copolymers, and the said halogenated copolymers being based on one monomer selected from the group consisting of acrylic acid, Alpha -chloroacrylic acid, acrylonitrile, Alpha -chloroacrylonitrile, methylacrylate and methyl Alpha -chloroacrylate and one monomer selected from the group consisting of maleic acid, maleic anhydride, chlormaleic acid, chlormaleic anhydride, dichloromaleic anhydride, furmaric acid and itaconic acid, at least one of the comonomers being halogen-substituted.
Claim 4
Dependent Claim
28 words
The polymers containing carboxylic and hydroxylic groups as claimed in claim 1, the polymers having between 54 and 73 weight % of free or lactonized carboxylic groups therein.
Claim 5
Dependent Claim
28 words
The polymers containing carboxylic and hydroxylic groups as claimed in claim 1, the polymers having between 2.6 and 20.4 weight % of free or lactonized hydroxylic groups therein.
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |