Patent EP0705855A2 successfully refreshed from Google Patents.
EP0705855A2
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EP
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Water borne crosslinkable compositions
Assignee: Air Products and Chemicals Inc
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Filing: 1995-10-05
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Granted: —
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Expires: 2015-10-05
Abstract
Abstract This invention relates to improved water-based polymeric dispersions having suitability for coatings and other applications which are based upon polymers having a plurality of acetoacetate functional groups and a crosslinkable component comprising a plurality of aromatic aldimine. The basic acetoacetate/benzaldimine containing system comprises an aqueous polymeric dispersion wherein the polymer has a plurality of acetoacetate groups and an effective amount of a curing agent having a plurality of benzaldimine functional groups. The improvement in providing for water-stable polymeric dispersions suitable for coatings and other applications comprises an aqueous dispersion comprising a polymeric component preferably derived from a plurality of polymerizable ethylenically unsaturated monomer units having pendant araldimine or heterocyclic aldimine functionality. Acetoacetate containing monomers generally are used in forming the polymer and a preferred monomer acetoacetoxyethymethacrylate. The polymer incorporating a plurality of benzaldimine functionality generally is formed by emulsion or suspension polymerization and the adimine functionality is benzaldimine.
Inventors
- 👤 Chao-Fong Tien
- 👤 Ning Chen
- 👤 Chung-Ling Mao
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 20:05
CPC Classifications
C; C09; C09D; C09D175/00; C09D175/04; C09D175/14; C08; C08F; C08F283/00; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0819; C08G18/0823; C08G18/10; C08G18/83; C08G18/831
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
67 words
In a water-based polymeric dispersion comprising a first aqueous dispersion containing a polymer having a plurality of activated keto methylene groups and an effective amount aromatic aldimine containing curing agent to effect cure thereof, the improvement which comprises a blend of: said first aqueous dispersion containing said polymer having activated keto methylene groups and a second aqueous dispersion containing a polymer having a plurality of araldimine functionality.
Claim 2
Dependent Claim
44 words
The water-based polymeric dispersion of Claim 1 wherein the activated keto methylene group in the polymer contained in said first aqueous dispersion containing said activated keto methylene groups is represented by the structures: wherein R is hydrogen or methyl and R.₁ is C₁₋₄ alkyl.
Claim 3
Dependent Claim
31 words
The water-based polymeric dispersion of Claim 1 wherein said polymer having araldimine functionality is represented by the structure: Polymer ―N=CH―R₂ wherein R₂ is the residue of an aromatic or heterocyclic aldimine.
Claim 4
Dependent Claim
64 words
The water-based polymeric dispersion of Claim 3 wherein at least a portion of the polymer in said first and second polymers has polymerized ethylenically unsaturated monomer units represented by the structure: wherein R₁ is C₁₋₁₀ alkyl, C₁₋₁₀ alkoxy, hydroxyalkyl where the alkyl group has from 1-10 carbon atoms and R₂ is C₁₋₁₀ alkyl, alkoxy, hydroxyalkyl where the alkyl group has from 1-10 carbon atoms.
Claim 5
Dependent Claim
28 words
The water-based polymeric dispersion of Claim 4 wherein the activated keto methylene functionality is represented by the formula: wherein R₃ hydrogen or CH₃ and R₄ is C₁₋₄ alkyl.
Claim 6
Dependent Claim
29 words
The water-based polymeric dispersion of Claim 5 wherein the substituent ― N=CH―R₂ is represented by the formulas selected from the group consisting of: wherein Y is hydrogen or methyl.
Claim 7
Dependent Claim
15 words
The water-based polymeric dispersion of Claim 6 wherein R₃ of the acetoacetate group is hydrogen.
Claim 8
Dependent Claim
30 words
The water-based polymeric dispersion of Claim 7 wherein the weight percent of acetoacetate functionality is from 2.5 to 50 percent by weight based on the total weight of the polymer.
Claim 9
Dependent Claim
30 words
The water-based polymeric dispersion of Claim 8 wherein the weight percent of araldimine functionality is from 2.5 to 50 percent by weight based upon the total weight of the polymer.
Claim 10
Dependent Claim
32 words
The water-based polymeric dispersion of Claim 9 wherein the acetoacetate group is pendent form an ethylenically unsaturated monomer, the unsaturated monomer having unsaturation represented by the formulas: wherein R₂ is C₁₋₄ alkylene.
Claim 11
Dependent Claim
36 words
The water based polymeric dispersion of Claim 10 wherein the araldimine functionality is present in a monomer represented by the formula: wherein R₂ is C₁₋₁₀ alkyl or C₁₋₁₀ alkoxy and R₃ is the residue of benzaldehyde:
Claim 12
Dependent Claim
23 words
The water-based polymeric dispersion of Claim 11 wherein the molecular weight of the polymer containing acetoacetate functionality is from about 10,000 to 500,000.
Claim 13
Dependent Claim
23 words
The water-based polymeric dispersion of Claim 12 wherein the molecular weight of the polymer containing araldimine functionality is from about 10,000 to 500,000.
Claim 14
Dependent Claim
16 words
The water-based polymeric dispersion of Claim 13 wherein R₂ of the araldimine polymer is C₁₋₁₀ alkoxy.
Claim 15
Dependent Claim
14 words
The water-based polymeric dispersion of Claim 14 wherein the acetoacetate containing monomer is acetoacetoxyethylmethacrylate.
Claim 16
Dependent Claim
14 words
The water-based polymeric dispersion of Claim 14 wherein the acetoacetate containing monomer is N-acetoacetylacrylamide.
Claim 17
Dependent Claim
27 words
The water-based polymeric dispersion of Claim 15 wherein the acetoacetate containing monomer is present in an amount of from 5-25 percent by weight of the total polymer.
Claim 18
Dependent Claim
36 words
The water-based polymeric dispersion of Claim 17 wherein the araldimine functionality in the polymer of the second aqueous dispersion is present in amount of 5 to 25% by weight of the total weight of the polymer.
Claim 19
Dependent Claim
31 words
The water-based composition of Claim 18 wherein the stoichiometry of the water-based dispersion is that there are from 0.1 to 10 equivalents aromatic aldimine functionality per proton on the acetoacetate group.
Claim 20
Dependent Claim
50 words
In a water-based polyurethane/acrylate hybrid having acetoacetate functionality and an aromatic aldimine crosslinker, the improvement which comprises a blend of: a) a water based polyurethane/acrylate hybrid having 2.5-50% acetoacetate functionality and b) a water based polyurethane/acrylate hybrid having aromatic or heterocyclic aldimine groups pendent from polymerized ethylenically unsaturated monomer units.
Claim 21
Dependent Claim
29 words
The water based polyurethane/acrylate dispersion of Claim 20 wherein the polyurethane is formed from an isocyanate selected from the group consisting of toluenediisocyanate, isophoronediisocyane, methylene di(phenylisocyante), and methylene di(cyclohexylisocyanate)acrylate.
Claim 22
Dependent Claim
28 words
The water based polyurethane/acrylate dispersion of Claim 21 wherein the polyurethane is formed from a long chain polyol having a molecular weight of form about 200 to 3000.
Claim 23
Dependent Claim
19 words
The water based polyurethane/acrylate dispersion of Claim 22 wherein the polymer containing acetoacetate functionality contains polymerized units of acetoacetoxyethylmethacrylate.
Claim 24
Dependent Claim
36 words
The water-based polyurethane hybrid of Claim 23 wherein the polymer containing araldimine functionality contains polymerized units of a monomer having the formula: wherein R₂ is C₁₋₁₀ alkyl or alkoxyl and R₃ is the residue of benzaldehyde:
Claim 25
Dependent Claim
28 words
The water-based polyurethane hybrid of Claim 24 wherein the polymer containing araldimine functionality is a copolymer comprising polymerized units of an acrylic monomer comprising methacrylate, butylacrylate, or ethylhexylacrylate.
Claim 26
Dependent Claim
34 words
The water based polyurethane/acrylate dispersion of Claim 24 wherein the polymer containing acetoacetate functionality contains polymerized units of acetoacetoxyethylmethacrylate is a copolymer comprising polymerized units of an acrylic monomer comprising methacrylate, butylacrylate, or ethylhexylacrylate.
References Cited (Backward Citations)
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