US4138446A
Expired / Lapsed
US
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Water-soluble high polymers and their preparation
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1977-09-30
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Granted: 1979-02-06
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Expires: 1997-09-30
Abstract
Abstract In the production of a water-soluble, cationic high polymer of (A) at least one of acrylamide and methacrylamide and (B) at least one of ammonium type monomers of either one of the formulas: <IMAGE> +tr <IMAGE> wherein R1 is a hydrogen atom or a methyl group, R2 and R3 are each a lower alkyl group, R4 is a hydrogen atom, a lower alkyl group, an aryl group, a hydroxy(lower)alkyl group, a benzyl group or a group of the formula: -CH2COO(CH2)mCH3 (m being an integer of 0 or 1), R5(-) is a group of either one of the formulas: -(CH2)2COO(-) and -(CH2)3SO3(-), X is a halogen atom or an acid residue, Y is -O- or -NH- and n is an integer of 1 to 4, a process which comprises initiating the polymerization of the monomeric component (A) with or without a portion of the monomeric component (B) in an aqueous medium containing an organic solvent selected from the group consisting of acetone, acetonitrile, t-butanol, tetrahydrofuran and dioxane at a concentration of about 15 to 70% by weight until the polymerization proceeds to a certain extent and then continuing polymerization while adding the remaining portion of the monomeric component (B) thereto under the occasional supplementation of a water-miscible organic solvent thereto so as to keep an appropriate viscosity of the reaction system to produce the high polymer in a high yield with ease.
Inventors
- 👤 Shigenao Kawakami
- 👤 Tatsumi Shibata
- 👤 Shin-ichi Isaoka
- 👤 Tutomu Shintani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:47
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/52; C08F220/54; C08F220/56; C08F267/00; C08F267/10; Y; Y10; Y10S; Y10S526/00; Y10S526/923
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
222 words
In the production of a water-soluble, cationic high polymer of: (A) at least one of acrylamide and methacrylamide and; (B) at least one of the ammonium-type monomers of either one of the formulas: ##STR3## wherein R 1 is a hydrogen atom or a methyl group, R 2 and R 3 are each a lower alkyl group, R 4 is a hydrogen atom, a lower alkyl group, an aryl group, a hydroxy(lower)alkyl group, a benzyl group or a group of the formula: --CH.sub.2 COO(CH.sub.2).sub.m CH.sub.3 wherein m is an integer of 0 or 1, R 5 .sup.⊖ is a group of either one of the formulas: --(CH.sub.2).sub.2 COO.sup.⊖ and --(CH.sub.2).sub.3 SO.sub.3.sup.⊖ , x is a halogen atom or an acid residue, Y is --O-- or --NH-- and n is an integer of 1 to 4, a process which comprises initiating the polymerization of the monomeric component (A) in an aqueous medium containing an organic solvent selected from the group consisting of acetone, acetonitrile, t-butanol, tetrahydrofuran and dioxane at a concentration of about 15 to 70% by weight until the polymerization proceeds to a certain extent and then continuing the polymerization while adding the monomeric component (B) thereto with the occasional supplementation of a water-miscible organic solvent thereto so as to keep an appropriate viscosity of the reaction system to produce the high polymer.
Claim 2
Dependent Claim
222 words
In the production of a water-soluble, cationic high polymer of: (A) at least one of acrylamide and methacrylamide and; (B) at least one of the ammonium-type monomers of either one of the formulas: ##STR3## wherein R 1 is a hydrogen atom or a methyl group, R 2 and R 3 are each a lower alkyl group, R 4 is a hydrogen atom, a lower alkyl group, an aryl group, a hydroxy(lower)alkyl group, a benzyl group or a group of the formula: --CH.sub.2 COO(CH.sub.2).sub.m CH.sub.3 wherein m is an integer of 0 or 1, R 5 .sup.⊖ is a group of either one of the formulas: --(CH.sub.2).sub.2 COO.sup.⊖ and --(CH.sub.2).sub.3 SO.sub.3.sup.⊖ , x is a halogen atom or an acid residue, Y is --O-- or --NH-- and n is an integer of 1 to 4, a process which comprises initiating the polymerization of the monomeric component (A) in an aqueous medium containing an organic solvent selected from the group consisting of acetone, acetonitrile, t-butanol, tetrahydrofuran and dioxane at a concentration of about 15 to 70% by weight until the polymerization proceeds to a certain extent and then continuing the polymerization while adding the monomeric component (B) thereto with the occasional supplementation of a water-miscible organic solvent thereto so as to keep an appropriate viscosity of the reaction system to produce the high polymer.
Claim 3
Dependent Claim
28 words
The process according to claim 1, wherein the concentration of the organic solvent in the aqueous medium at the beginning is from about 15 to 50% by weight.
Claim 4
Dependent Claim
19 words
The process according to claim 1, wherein the organic solvent in the aqueous medium at the beginning is acetone.
Claim 5
Dependent Claim
28 words
The process according to claim 1, wherein the polymerization at the initial stage is carried out until about 2% or more of the monomer component (A) is polymerized.
Claim 6
Dependent Claim
21 words
The process according to claim 1, wherein the polymerization is carried out at a temperature not higher than about 55° C.
Claim 7
Dependent Claim
28 words
The process according to claim 1, wherein the proportion of the component (A) and the component (B) to be polymerized is from about 95:5 to 10:90 by weight.
Claim 8
Dependent Claim
29 words
The process according to claim 1, wherein the concentration of the monomeric component (A) in the aqueous medium at the beginning is from about 10 to 50% by weight.
Claim 9
Dependent Claim
38 words
The process according to claim 7, whereby a polymer essentially consisting of units of the monomeric component (A) and units of the monomeric component (B) in a proportion of from about 95:5 to 10:90 by weight is obtained.
Claim 10
Dependent Claim
106 words
The process according to claim 1, which comprises initiating the polymerization of the monomeric component (A) alone in an aqueous medium containing the organic solvent as defined in claim 1 at a concentration of about 15 to 50% by weight at a temperature of from about 5 to 55° C. until 2% or more of the monomeric component (A) is polymerized and then continuing the polymerization while adding thereto the monomeric component (B) dissolved in water or a mixture thereof with a water-miscible organic solvent under the occasional supplementation of a water-miscible organic solvent thereto so as to keep an appropriate viscosity of the reaction system.
Claim 11
Dependent Claim
13 words
A water-soluble, cationic high polymer obtained by the the process of claim 1.
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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) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |