Claims
- 1. An aqueous crosslinkable coating composition comprising as aqueous dispersed components:(i) at least one autoxidisably crosslinkable organic polymer containing unsaturated fatty acid residues, and (ii) at least one vinyl polymer which is not autoxidisably crosslinkable and bears acetoacetyl functional groups, and wherein said composition has present therein carbonyl-reactive amine and/or hydrazine derivative functional groups which impart crosslinkability to component (ii).
- 2. A composition according to claim 1 wherein component (i) is a polyurethane polymer.
- 3. A composition according to claim 2 wherein the polyurethane polymer has been formed by the chain extension of an isocyanate-terminated polyurethane prepolymer with an active hydrogen chain extending compound.
- 4. A composition according to any one of claims 1 to 3 wherein said vinyl polymer-borne acetoacetyl functional groups are provided by acetoacetate groups of formula or by acetoacetoacetamide groups of formula or by 1,3-diketone groups of formula wherein R1 is hydrogen or a monovalent hydrocarbyl radical, and where R2 is a divalent hydrocarbyl radical.
- 5. A composition according to any one of claims 1 to 3 wherein the functional amine or hydrazine groups are provided by polyamines or polyhydrazines which are not part of the autoxidisably crosslinkable organic polymer or of the vinyl polymer.
- 6. A composition according to any one of claims 1 to 3 wherein the hydrazine functional group comprises hydrazine, hydrazone or hydrazide groups.
- 7. A composition according to any one of claims 1 to 3 wherein the hydrazine functional groups are provided by compounds selected from dicarboxylic acid bis-hydrazides and hydrazones derived therefrom, carbonic acid hydrazides and bis-semicarbazides.
- 8. A composition according to any one of claims 1 to 3 wherein the autoxidisably crosslinkable polymer containing unsaturated fatty acid residues also bears chain-pendant amine or hydrazine derivative functional groups.
- 9. A composition according to any one of claims 1 to 3 wherein the vinyl polymer also bears chain pendant amine or hydrazine derivative functional groups.
- 10. A composition according to any one of claims 1 to 3 wherein the ratio of component (i) to component (ii) is from 90:10 to 10:10.
- 11. A coated substrate having a coating obtained from an aqueous crosslinkable coating composition as claimed in any one of claims 1 to 3.
- 12. The method which comprises coating an aqueous crosslinkable coating composition as claimed in any one of claims 1 to 3 onto a substrate.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9906619 |
Mar 1999 |
GB |
|
Parent Case Info
This application is the National Phase of International Application PCT/GB00/01009 filed Mar. 17, 2000 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/GB00/01009 |
|
WO |
00 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO00/56826 |
9/28/2000 |
WO |
A |
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5559192 |
Bors et al. |
Sep 1996 |
A |
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Country |
0 332 326 |
Sep 1989 |
EP |
0 444 454 |
Sep 1991 |
EP |
0 663 412 |
Jul 1995 |
EP |
0 705 855 |
Apr 1996 |
EP |