Patent US4431768A successfully refreshed from Google Patents.
US4431768A
Expired / Lapsed
US
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Aqueous compositions containing organic polymers curable at low temperatures in the wet state
Assignee: Dow Chemical Co
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Filing: 1982-05-04
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Granted: 1984-02-14
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Expires: 2002-05-04
Abstract
Abstract Aqueous acidic compositions which contain a combination of an organic polymer having a bound latent source of thiolate ions, such as isothiouronium groups and an organic polymer having bound cationic onium groups, such as sulfonium groups, or a polymer containing both kinds of groups can be cured in the wet state by raising the pH to above about 9 at a temperature from about 0° C. to about 100° C.
Inventors
- 👤 Ritchie A. Wessling
- 👤 Thomas C. Klingler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:46
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/38; C; C04; C04B; C04B24/00; C04B24/24; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08J; C08J9/00; C08J9/30
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
112 words
An aqueous mixture of a low temperature curable, organic polymeric composition comprising (A) an organic polymer having a bound latent source of thiolate ions and bound cationic onium groups which are subject to displacement reactions with a thiolate ion, or a combination of (B) an organic polymer having a latent source of thiolate ions bound to the polymer and (C) an organic polymer having bound cationic onium groups which are subject to displacement reactions with a thiolate ion; said organic polymer (A) and at least one of organic polymers (B) and (C) having a sufficient amount of the bound onium groups to provide dispersion stability or cause the polymer to be water-soluble.
Claim 2
Dependent Claim
112 words
An aqueous mixture of a low temperature curable, organic polymeric composition comprising (A) an organic polymer having a bound latent source of thiolate ions and bound cationic onium groups which are subject to displacement reactions with a thiolate ion, or a combination of (B) an organic polymer having a latent source of thiolate ions bound to the polymer and (C) an organic polymer having bound cationic onium groups which are subject to displacement reactions with a thiolate ion; said organic polymer (A) and at least one of organic polymers (B) and (C) having a sufficient amount of the bound onium groups to provide dispersion stability or cause the polymer to be water-soluble.
Claim 3
Dependent Claim
19 words
The aqueous mixture of claim 1 in which at least one component is in the form of a latex.
Claim 4
Dependent Claim
20 words
The aqueous mixture of claim 1 in which the organic polymer is water-soluble in the absence of a reactive group.
Claim 5
Dependent Claim
18 words
The aqueous dispersion of claim 1 in which the latent source of thiolate ions is a tetraalkylisothiouronium group.
Claim 6
Dependent Claim
21 words
The aqueous dispersion of claim 1 in which the cationic onium groups which are subject to displacement reactions are sulfonium groups.
Claim 7
Independent Claim
113 words
A method for curing at low temperature an organic, polymeric composition comprising (1) providing an aqueous composition having an acidic pH comprising at least one polymer having a latent source of thiolate ions bound to a polymer and cationic onium groups bound to a polymer which are subject to displacement reactions with a thiolate ion; said latent source of thiolate ions and said cationic onium groups which are subject to displacement reactions with thiolate ions being on the same polymer or on different polymers; (2) Raising the pH of the aqueous composition above about 9; (3) Allowing the resulting mixture to stand at a temperature of from about 0° to about 100° C.
Claim 8
Independent Claim
113 words
A method for curing at low temperature an organic, polymeric composition comprising (1) providing an aqueous composition having an acidic pH comprising at least one polymer having a latent source of thiolate ions bound to a polymer and cationic onium groups bound to a polymer which are subject to displacement reactions with a thiolate ion; said latent source of thiolate ions and said cationic onium groups which are subject to displacement reactions with thiolate ions being on the same polymer or on different polymers; (2) Raising the pH of the aqueous composition above about 9; (3) Allowing the resulting mixture to stand at a temperature of from about 0° to about 100° C.
Claim 9
Dependent Claim
18 words
The method of claim 6 in which at least one polymer is in the form of a latex.
Claim 10
Dependent Claim
20 words
The method of claim 6 in which at least one polymer is water-soluble in the absence of a reactive group.
Claim 11
Dependent Claim
49 words
The method of claim 6 in which the aqueous composition comprising the polymer is provided by mixing in aqueous media, a polymer having a latent source of thiolate ions bound thereto with a polymer having bound cationic onium groups which are subject to displacement reactions with a thiolate ion.
Claim 12
Dependent Claim
34 words
The method of claim 6 which has the additional steps of (a) frothing the acidic aqueous composition and after the raising of the pH (b) allowing the froth to convert to a stable foam.
Claim 13
Dependent Claim
17 words
The method of claim 6 in which the pH is raised by mixture with an alkaline cement.
Claim 14
Dependent Claim
12 words
The method of claim 8 in which the cured product remains hydrophilic.
Claim 15
Dependent Claim
21 words
The method of claim 6 having the additional step of mixing the acidic aqueous dispersion with an aqueous dispersion of fibers.
Claim 16
Dependent Claim
14 words
The method of claim 6 with the added step of impregnating a porous substrate.
Claim 17
Dependent Claim
21 words
The method of claim 6 having the additional step immediately following step 2 of coating the aqueous dispersion onto a substrate.
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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) | 1987-02-13 | 1987-08-15 | 1988-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-13 | 1991-08-15 | 1992-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-13 | 1995-08-15 | 1996-02-14 | $7700.00 | Window Closed / Lapsed |