US4677158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paint thickener
Assignee: Sued Chemie Inc
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Filing: 1985-11-12
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Granted: 1987-06-30
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Expires: 2005-11-12
Abstract
Abstract A process whereby a smectite clay having a cationic exchange capacity of at least 50 meq./100 gm of clay is reacted with a quaternary ammonium compound to yield a cationic structure suitable as a thickener for aqueous suspensions, particularly latex paints and caulks. The general structure of the quaternary ammonium compound is typically a nitrogen atom bonded to four separated carbon chains where one chain can be a methyl or alkyl group containing 10 to 22 carbons, and the second chain an alkyl group containing from 10 to 22 carbons or a polyoxyethylene chain. The third and fourth chains are polyoxyethylene chains where the total munber of ethylene oxide units is from 5 to 200 moles.
Inventors
- 👤 Su C. Tso
- 👤 Gary W. Beall
- 👤 Mary C. Holthouser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:16
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/36; C01B33/38; C01B33/44; C09; C09D; C09D7/00; C09D7/40; C09D7/43; C08; C08K; C08K3/00; C08K3/34; C08K3/346; C08K5/00; C08K5/16; C08K5/17; C08K5/19
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
37 words
Organoclay composition comprising the reaction product of a smectite clay having an ion exchange capacity of at least 50 meq. wt. per 100 g clay (active basis), and an organic cationic compound having the following formula: ##STR2##
Claim 2
Dependent Claim
37 words
Organoclay composition comprising the reaction product of a smectite clay having an ion exchange capacity of at least 50 meq. wt. per 100 g clay (active basis), and an organic cationic compound having the following formula: ##STR2##
Claim 3
Dependent Claim
24 words
The organoclay composition of claim 1: wherein the anion, X-, is from the group consisting of chloride, bromide, iodide, acetate, sulfate, borate and phosphate.
Claim 4
Dependent Claim
21 words
An organoclay composition of claim 1, wherein the smectite type clay is selected from group consisting of hectorite and sodium bentonite.
Claim 5
Dependent Claim
16 words
An organoclay composition of claim 1, wherein the terminal polyoxyethylene group is capped by propylene oxide.
Claim 6
Dependent Claim
25 words
An organoclay composition of claim 1, wherein the polyoxyethylene chain is terminated by a group selected from the group consisting of sulfate, carboxylate, phosphate etc.
Claim 7
Dependent Claim
27 words
An organoclay composition of claim 1, wherein the said organic cation is from 5 meq. wt. to 150 meq. wt. per 100 g clay, 100% active basis.
Claim 8
Dependent Claim
98 words
A process for preparing organoclay composition of claim 1 comprising: a. preparing an aqueous slurry of 1 to 20%, by swight, of a smectite type clay having an ion exchange capacity of at least 50 meq. wt. per 100 g clay, 100% active basis, b. heating the clay slurry between 40° C. to 95° C., c. adding to the clay slurry, 5 to 150 meq. wt. per 100 g clay of a quaternary ammonium compound of claim 1, d. reacting the mixture for a sufficient time to form a organoclay reaction product of the composition of claim 1.
Claim 9
Dependent Claim
21 words
An organoclay composition of claim 1, wherein the polyoxyethylene chain is terminated by reaction with an aromatic or alkyl mono isocyanate.
Claim 10
Dependent Claim
19 words
An organoclay composition of claim 1, wherein the polyoxyethylene chains are crosslinked by reaction with aromatic or alkyl diisocyanate.
Claim 11
Dependent Claim
11 words
An organoclay composition of claim 1 wherein the polyoxyethylene is branched.
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) | 1990-06-29 | 1990-12-29 | 1991-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-29 | 1994-12-29 | 1995-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-29 | 1998-12-29 | 1999-06-30 | $7700.00 | Window Closed / Lapsed |