US3894980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thickener
Assignee: Rohm and Haas Co
•
Filing: 1973-04-30
•
Granted: 1975-07-15
•
Expires: 1993-04-30
Abstract
Abstract An aqueous dispersion of emulsion copolymers of about 15 to 35 or 40 percent by weight of acrylic acid or methacrylic acid, about 20 to 60 percent by weight of an alkoxyalkyl acrylate, and from zero to 0.8 percent by weight of a diethylenically unsaturated monomer is used, in conjunction with an alkaline material, as a thickening agent.
Inventors
- 👤 Gabriel L Detommaso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:42
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/04; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1804; C08F220/26; C08F220/28; C08F220/281; C09; C09D; C09D7/00; C09D7/40; C09D7/43; C09D7/44; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/08; C08L33/10; Y; Y10; Y10S; Y10S526/00; Y10S526/932
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
36 words
A STABLE AQUEOUS DISPERSION OF A WATER-INSOLUBLE EMULSION COPOLYMER CONTAINING ABOUT 15 TO 40 PERCENT BY WEIGHT OF ACRYLIC CID OR METHACRYLIC ACID, 20 O 60 PERCENT BY WEIGHT OF AN ALKOXYALKYL ACRYLATE OF THE FORMULA:
Claim 2
Dependent Claim
36 words
A STABLE AQUEOUS DISPERSION OF A WATER-INSOLUBLE EMULSION COPOLYMER CONTAINING ABOUT 15 TO 40 PERCENT BY WEIGHT OF ACRYLIC CID OR METHACRYLIC ACID, 20 O 60 PERCENT BY WEIGHT OF AN ALKOXYALKYL ACRYLATE OF THE FORMULA:
Claim 3
Dependent Claim
70 words
A method of thickening an aqueous medium which comprises adding a copolymer dispersion according to claim 1, or such dispersion diluted with water, to the aqueous medium and adding an alkaline neutralizing agent to neutralize some or all of the carboxylic acid groups in the copolymer, the amount of copolymer dispersion added and the degree of neutralization of the carboxylic acid groups being such as to thicken the aqueous medium.
Claim 4
Dependent Claim
31 words
A method according to claim 2, in which at least part of the alkaline neutralizing agent is introduced into the medium to be thickened before the addition of the copolymer dispersion.
Claim 5
Dependent Claim
27 words
A method according to claim 2, in which the alkaline neutralizing agent is introduced tO the medium to be thickened after the addition of the copolymer dispersion.
Claim 6
Dependent Claim
21 words
A process according to claim 2 in which the medium to be thickened is an aqueous dispersion of an emulsion polymer.
Claim 7
Dependent Claim
18 words
A method according to claim 2, in which the medium to be thickened is an aqueous pigment suspension.
Claim 8
Dependent Claim
39 words
A method according to claim 4 wherein the amount of copolymer dispersion added is such as to provide 0.1 percent to 5 percent by weight of such copolymer, based on the total weight of solids in the thickened medium.
Claim 9
Dependent Claim
16 words
A dispersion according to claim 1 in which the monomer of the formula is methoxyethoxyethyl acrylate.
Claim 10
Dependent Claim
16 words
A dispersion according to claim 1 in which the monomer of the formula is methoxyethyl acrylate.
Claim 11
Dependent Claim
16 words
A dispersion according to claim 1 in which the monomer of the formula is ethoxyethyl acrylate.
References Cited (Backward Citations)
US2123599A
Cited
US2129722A
Cited
US2404292A
Cited
US2440092A
Cited
US2870129A
Cited
US2906724A
Cited
US3033811A
Cited
US3240740A
Cited
US3021295A
Cited
US3361695A
Cited
US3431226A
Cited
US3300428A
Cited
US3441430A
Cited
US3511799A
Cited
US3621004A
Cited
US3598770A
Cited
US3657175A
Cited
US3728314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |