Claims
- 1. A method for the preservation of polyvinyl chloride or polyurethane which comprises treating the polyvinyl chloride or polyurethane with a composition comprising(a) an isothiazolinone of formula 1 wherein X is C1-8alkyl, C3-5-cycloalkyl or aralkyl; and Y and Z are each, independently, hydrogen, halogen or C1-4-alkyl; and (b) a metal complex of a cyclic thiohydroxamic acid.
- 2. A method as claimed in claim 1 wherein component (a) is either N-n-octyl isothiazolin-3-one or 4,5-dichloro-N-n-octyl isothiazolin-3-one.
- 3. A method as claimed in either claim 1 or claim 2 wherein the cyclic thiohydroxamic acid is a compound of formula 2 whereinA is a group —C(R2)2—, —C(R2)═or —CR2═CR2—; B is a group —C(R2)2—, —C(R2)═or —C(NR2)—; D is a group —C(R2)2—, —C(R2)═, NR2— or sulphur; and R2 is hydrogen, optionally substituted C1-6-hydrocarbyl or two groups R2 together with the carbon atom to which they are attached form a C3-6-hydrocarbon ring or two groups R2 together with the two carbon atoms to which they are attached form a fused ring.
- 4. A method as claimed in claim 3 wherein A is the group —CR2═CR2—.
- 5. A method as claimed in claim 4 wherein R2 is hydrogen.
- 6. A method as claimed in claim 1 wherein the metal is in zinc.
- 7. A method as claimed in claim 1 wherein component (b) is the 2:1 zinc complex of 1-hydroxypyridine-2-thione.
- 8. A method as claimed in claim 1 wherein the relative proportions of component (a) and component (b) is from 10:1 to 1:10.
- 9. A method according to claim 1, wherein X is said C1-8-alkyl.
- 10. A method according to claim 1, wherein X is said C3-5-cycloalkyl.
- 11. A method according to claim 1, wherein X is said aralkyl.
- 12. A composition comprising a plastics material comprising polyvinyl chloride or polyurethane and (a) N-n-octyl isothiazolin-3-one or 4,5-dichloro-N-n-octyl isothiazolin-3-one; and (b) a metal complex of a cyclic thiohydroxamic acid.
- 13. A composition according to claim 12, wherein (b) is either the 2:1 zinc complex of 3-hydroxy-4-methylthiazol-2(3H)thione or the 2:1 zinc complex of 1-hydroxypyridine-2-thione.
- 14. A composition according to claim 12, wherein the relative proportions of component (a) and component (b) is from 10:1 to 1:10.
- 15. A composition according to claim 12, further comprising a carrier.
- 16. A composition according to claim 15, wherein the carrier comprises a non-polar organic liquid, a polar organic liquid, water or mixtures thereof.
- 17. A composition according to claim 12, further comprising a dispersant, emulsifier or mixtures thereof.
- 18. A composition according to claim 12, further comprising a plasticizer, a stabilizer or mixtures thereof.
- 19. A master batch consisting essentially of:(a) polyvinyl chloride or polyurethane; (b) N-n-octyl isothiazolin-3-one or 4,5-dichloro-N-n-octyl isothiazolin-3-one; and (c) a metal complex of a cyclic thiohydroxamic acid.
- 20. A method for preserving a plastics material, which comprises treating the plastics material with a composition comprising(a) an isothiazolinone of formula 1 wherein X is C1-8-alkyl, C3-5-cycloalkyl or aralkyl; and Y and Z are each, independently, hydrogen, halogen or C1-4-alkyl; and (b) a metal complex of a cyclic thiohydroxamic acid; wherein the plastics material is selected from polyvinylhalides, polyurethanes, polyalkylenes, polyalkylene vinyl acetates, polyesters and polyacrylonitriles.
- 21. A method according to claim 20, wherein (b) is the 2:1 zinc complex of 1-hydroxypyridine-2-thione.
- 22. A method according to claim 20, wherein (a) is N-n-octyl isothiazolin-3-one or 4,5-dichloro-N-n-octyl isothiazolin-3-one.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9826963 |
Dec 1998 |
GB |
|
Parent Case Info
This application is the National Phase of International Application PCT/GB99/03422 filed Oct. 18, 1999 which designated the U.S. and that International Application was published under PCT Article 21(2) in English.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
PCT/GB99/03422 |
|
WO |
00 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO00/33656 |
6/15/2000 |
WO |
A |
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Non-Patent Literature Citations (1)
Entry |
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