Patent EP0170474A2 successfully refreshed from Google Patents.
EP0170474A2
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EP
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Water-borne coating compositions containing metallic pigment having reduced tendency to gas generation on storage
Assignee: Imperial Chemical Industries Ltd
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Filing: 1985-07-18
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Granted: —
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Expires: 2005-07-18
Abstract
Abstract The tendency of metallic pigments, especially of aluminium flake pigments, to react with the aqueous medium of a water-borne paint composition with the generation of gaseous material is prevented or reduced by incorporating in the composition an agent containing in the molecule at least one P-OH group, or a salt derivative thereof, which is obtained by reacting a compound containing the grouping -0-PO(OH 2 ) with one or more epoxide group-containing compounds at least one of which also contains at least one aromatic or alicyclic group.
Inventors
- 👤 Alan James Backhouse
- 👤 Andrew Frangou
- 👤 Stephen James Thorne
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 09:18
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/38
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
157 words
A water-borne coating composition comprising a film-forming polymer, a metallic pigment and an aqueous diluent medium, wherein the tendency of the pigment to react with the aqueous medium and release gaseous material is prevented or reduced by the incorporation in the composition of an agent which contains in the molecule at Least one acidic hydroxyl group Linked to a phosphorus atom, or a salt derivative thereof, and which is the reaction product of (i) a compound containing in the molecule the grouping with (ii) one or more compounds which contain in the molecule at Least one epoxide group and at Least one of which also contains in the molecule at Least one aromatic or alicyclic group, provided that, if the component (i) or one of the compounds (ii), or both, contain an aliphatic group of more than 6 carbon atoms, the total proportion of such aliphatic groups in the reaction product does not exceed 65X by weight.
Claim 2
Dependent Claim
157 words
A water-borne coating composition comprising a film-forming polymer, a metallic pigment and an aqueous diluent medium, wherein the tendency of the pigment to react with the aqueous medium and release gaseous material is prevented or reduced by the incorporation in the composition of an agent which contains in the molecule at Least one acidic hydroxyl group Linked to a phosphorus atom, or a salt derivative thereof, and which is the reaction product of (i) a compound containing in the molecule the grouping with (ii) one or more compounds which contain in the molecule at Least one epoxide group and at Least one of which also contains in the molecule at Least one aromatic or alicyclic group, provided that, if the component (i) or one of the compounds (ii), or both, contain an aliphatic group of more than 6 carbon atoms, the total proportion of such aliphatic groups in the reaction product does not exceed 65X by weight.
Claim 3
Dependent Claim
32 words
A composition as claimed in claim 1, wherein the compound (i) is orthophosphoric acid or a monoester thereof, the esterifying group being an alkyl, aLkoxyaLkyL, aryl, alkyl-substituted aryl, cycloalkyl or heterocyclic group.
Claim 4
Dependent Claim
17 words
A composition as claimed in claim 1 or claim 2, wherein the compound (ii) is phenylglycidyl ether.
Claim 5
Dependent Claim
26 words
A composition as claimed in claim 1 or claim 2, wherein the compound (ii) is an epoxy resin obtained by the reaction of epichLorhydrin with bisphenoL-A.
Claim 6
Dependent Claim
39 words
A composition as claimed in claim 1 or claim 2, wherein the compound (ii) is an addition copolymer derived from at Least one monomer containing an aromatic or alicyclic ring and at Least one monomer containing an epoxide group.
Claim 7
Dependent Claim
19 words
A composition as claimed in any one of claims 1 to 5, wherein the metallic pigment is aluminium flake.
Claim 8
Dependent Claim
32 words
A composition as claimed in any one of claims 1 to 6, wherein the metaLLic pigment has been contacted with the inhibiting agent prior to incorporation of the pigment into the composition.
Claim 9
Dependent Claim
24 words
A composition as claimed in any one of claims 1 to 7, wherein the inhibiting agent is introduced during the formulation of the composition.
Claim 10
Dependent Claim
39 words
A composition as claimed in any one of claims 1 to 8, wherein the inhibiting agent is used in an amount which, on the basis of its acid value, is equivalent to from 0.2X to 5X of orthophosphoric acid.
Claim 11
Dependent Claim
40 words
A process for coating a substrate wherein there is initially applied to the substrate surface a basecoat composition according to any one of claims 1 to 9, and there is then applied to the resulting film a transparent topcoat composition.
References Cited (Backward Citations)
No citation records indexed.
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