Claims
- 1. A method for preserving an acrylate polymer emulsion, said method comprising intimately admixing therewith a polymer emulsion preserving amount of a stabilized composition comprising in intimate admixture:
- (A) an aqueous solution comprising at least one 3-isothiazolone compound of the Formula (I) or (II): ##STR4## wherein Y is a hydrogen atom or an alkyl group of from 1 to 18 carbon atoms, an alkenyl or alkynyl group of from 2 to 8 carbon atoms, a cycloalkyl group of from 5 to 8 carbon atoms, an aralkyl group of from 7 to 11 carbon atoms or an aryl group of from 6 to 10 carbon atoms;
- R and R.sup.1 are each selected from the group consisting of hydrogen, halogen and an alkyl group of from 4 to 8 carbon atoms;
- M is a cation selected from the group consisting of a metal cation, an ammonium cation or an ammonium cation substituted with at least one organic group, a pyridinium cation and a pyrimidinium cation;
- X is an anion forming a compound with the cation M; and
- a is 1 or 2 and n is a whole number which satisfies the valence of the cation M when completely reacted with anion X; and
- (B) an effective stabilizing amount for said 3-isothiazolone compound of an inorganic oxidizing agent comprising a peroxide, a perborate or a mixture thereof, and a stabilizer for said oxidizing agent.
- 2. The method as defined in claim 1 wherein Component (A) comprises from 0.5 to 3 wt. % of said 3-isothiazolone and component (B) comprises at least 0.1 wt. % of said oxidizing agent (B) based on the whole solution.
- 3. The method as defined in claim 1 wherein said inorganic oxidizing agent comprises hydrogen peroxide, sodium perborate or a mixture thereof.
- 4. The method as defined in claim 1 wherein said stabilizer for the oxidizing agent comprises diethylene triamine pentaacetic acid or a salt thereof.
- 5. The method as defined in claim 1 wherein said oxidizing agent (B) is present in an amount of from 0.1 to 0.3 wt. % based on the whole solution.
- 6. The method as defined in claim 1 wherein said stabilizer for the oxidizing agent is present in an amount of from 1 to 20 weight parts per million, based on the whole solution.
- 7. The method as defined in claim 1 wherein said 3-isothiazolone comprises: 5-chloro-2-methyl-3-isothiazolone; 2-methyl-3-isothiazolone; 4,5-dichloro-2-cyclohexyl-3-isothiazolone; 4,5-dichloro-2-octyl-3-isothiazolone; or a mixture thereof.
- 8. The method as defined in claim 1 wherein said composition comprises from 1.0 to 1.5 wt. % of 5-chloro-3-isothiazolone, from 0.1 to 0.3 wt. % of hydrogen peroxide and from 1 to 10 weight parts per million of diethylene triamine pentaacetic acid or a salt thereof, all based on the whole solution.
- 9. The method as defined in claim 1 wherein said composition has been subjected to a heat treating step at a temperature of from 50 to 100 degrees C.
- 10. The method as defined in claim 1 wherein said composition is free of nitrate, nitrite, nitrosamine, formaldehyde, and cupric ions.
- 11. The method as defined in claim 1 wherein in said composition there is also present a compound selected from chloride, nitrate, nitrite, formaldehyde, or a mixture thereof.
- 12. The preserved polymer emulsion prepared by the method as defined in claim 1.
Priority Claims (1)
Number |
Date |
Country |
Kind |
89-120912.4 |
Nov 1989 |
EPX |
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Parent Case Info
This is a divisional of application Ser. No. 07/582,499 filed Sep. 14, 1990 now U.S. Pat. No. 5,153,213.
US Referenced Citations (7)
Non-Patent Literature Citations (1)
Entry |
Research Disclosure, 160, 28 (1977). |
Divisions (1)
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Number |
Date |
Country |
Parent |
582499 |
Sep 1990 |
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