US4165318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formaldehyde stabilized coating compositions
Assignee: Rohm and Haas Co
•
Filing: 1978-09-18
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Granted: 1979-08-21
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Expires: 1998-09-18
Abstract
Abstract Coating compositions which contain a mildew-controlling amount of an isothiazolone are stabilized against chemical decomposition of the isothiazolone by the addition of formaldehyde or a compound which releases formaldehyde under basic conditions.
Inventors
- 👤 Stanley A. Greenfield
- 👤 John A. Dupont
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:14
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/14; A; A01; A01N; A01N43/00; A01N43/72; A01N43/80
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
23 words
In a solution of a 3-isothiazolone in a polar organic solvent, the improvement wherein the solution further comprises a stabilizing amount of formaldehyde.
Claim 2
Dependent Claim
23 words
In a solution of a 3-isothiazolone in a polar organic solvent, the improvement wherein the solution further comprises a stabilizing amount of formaldehyde.
Claim 3
Dependent Claim
16 words
The solution of claim 1 wherein the 3-isothiazolone is 2-n-octyl-3-isothiazolone and the solvent is propylene glycol.
Claim 4
Independent Claim
30 words
A method of stabilizing a solution of 3-isothiazolone in a polar organic solvent against chemical decomposition of the isothiazolone which comprises incorporating into the composition a stabilizing amount of formaldehyde.
Claim 5
Independent Claim
30 words
A method of stabilizing a solution of 3-isothiazolone in a polar organic solvent against chemical decomposition of the isothiazolone which comprises incorporating into the composition a stabilizing amount of formaldehyde.
Claim 6
Dependent Claim
17 words
The method of claim 3 wherein the 3-isothiazolone is a 2-n-octyl-3-isothiazolone and the solvent is propylene glycol.
Claim 7
Dependent Claim
71 words
The composition of claim 1 wherein the isothiazolone has the formula ##STR11##wherein Y is hydrogen atom, a (C 1 -C 18 )alkyl group, a (C 6 -C 10 )aryl group, or a (C 7 -C 10 )aralkyl group; R is a hydrogen atom, a halogen atom, or a (C 1 -C 4 )alkyl group, and R' is a hydrogen atom, a halogen atom, or a (C 1 -C 4 )alkyl group.
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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) | 1982-08-20 | 1983-02-19 | 1983-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-20 | 1987-02-19 | 1987-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-20 | 1991-02-19 | 1991-08-21 | $7700.00 | Window Closed / Lapsed |