US4374720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of water soluble cross-linkers and their use in the manufacture of anionic polymers
Assignee: Veolia WTS Systems USA Inc
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Filing: 1981-08-21
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Granted: 1983-02-22
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Expires: 2001-08-21
Abstract
Abstract The reaction of glycidyl methacrylate (GMA) with an ionogenic methacrylate ester containing amine groups of the tertiary type such as dimethylaminoethyl methacrylate (DMAEMA) in the presence of an acidic water solution produces a new and novel water soluble, ionic, cross-linking, methacrylate bifunctional monomer which is useful in the manufacture of anion exchange polymers while employing an aqueous solvent system.
Inventors
- 👤 Russell J. MacDonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:03
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/34; C08F20/36; B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/14; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; C08J5/2231; C08J2333/00; C08J2333/04; C08J2333/06; C08J2333/10; C08J2333/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
23 words
A homopolymer of a water soluble, ionic, cross-linking bifunctional monomer of the formula: ##STR7## where X represents a univalent anion of an acid.
Claim 2
Dependent Claim
23 words
A homopolymer of a water soluble, ionic, cross-linking bifunctional monomer of the formula: ##STR7## where X represents a univalent anion of an acid.
Claim 3
Dependent Claim
53 words
The structure according to claim 1 wherein X is selected from the group consisting of Cl - , Br - , I - , HSO 4 - , NO 3 - , (SO 4 = ) 1/2 , RCOO - , where R represents an alkyl group from C 1 -C 6 .
Claim 4
Dependent Claim
31 words
The method of preparing a water soluble compound of the formula of claim 1 comprising reacting a liquid mixture of glycidyl methacrylate, dimethylaminoethyl methacrylate and a water solution of an acid.
Claim 5
Dependent Claim
27 words
The method of claim 3 wherein the said water soluble, cross-linking compound is maintained at an elevated temperature for a time sufficient to homopolymerize the said mixture.
Claim 6
Dependent Claim
18 words
The method of claim 4 wherein a temperature of about 80° C. for about 2 hours is employed.
Claim 7
Dependent Claim
21 words
The method of claim 3 wherein the acid is selected from the group consisting of halide, carboxylic, sulfuric and nitric acids.
Claim 8
Dependent Claim
93 words
An electrochemical cell comprising chambers adapted to contain liquids defined by ion permeable membranes and having terminal electrodes for passing a direct current transversely through said chambers and membranes, the improvement wherein at least some of said membranes are comprised of an ion exchange, cross-linked, polymeric structure comprised essentially of a plurality of recurring units of the formula: ##STR8## where n is 0 to 0.75 mole fraction of m and wherein R is a member selected from a quaternary ammonium and tertiary amine group and X represents a univalent anion of an acid.
Claim 9
Dependent Claim
93 words
An electrochemical cell comprising chambers adapted to contain liquids defined by ion permeable membranes and having terminal electrodes for passing a direct current transversely through said chambers and membranes, the improvement wherein at least some of said membranes are comprised of an ion exchange, cross-linked, polymeric structure comprised essentially of a plurality of recurring units of the formula: ##STR8## where n is 0 to 0.75 mole fraction of m and wherein R is a member selected from a quaternary ammonium and tertiary amine group and X represents a univalent anion of an acid.
References Cited (Backward Citations)
US3720656A
Cited
US4119610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-21 | 1986-08-23 | 1987-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-21 | 1990-08-23 | 1991-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-21 | 1994-08-23 | 1995-02-22 | $7700.00 | Window Closed / Lapsed |