EP0360422A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Anticorrosive pigment composition
Assignee: Solvay Solutions UK Ltd
•
Filing: 1989-08-23
•
Granted: —
•
Expires: 2009-08-23
Abstract
Abstract Anticorrosive compositions for use in paints comprise (i) zinc oxide with (ii) the reaction product of an acidic trivalent metal compound and a silicate or (iii) an aluminium/silicate material eg a clay.
Inventors
- 👤 John Richard Collier
- 👤 Kenneth Urmston Holker
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 22:44
CPC Classifications
C; C09; C09C; C09C3/00; C09C3/06; C09C3/063; C09C1/00; C09C1/04; C09C1/043; C09D; C09D5/00; C09D5/08; C09D5/082; C09D5/084; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2004/62
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
61 words
An anticorrosive pigment composition which comprises zinc oxide and a trivalent metal silicate material selected from the group consisting of (i) a material obtained by reacting a trivalent metal compound with a silicate (ii) a naturally occurring aluminium silicate material or a synthetic equivalent thereof, (iii) a naturally occurring or synthetic aluminium silicate surface-modified by ion exchange, and (iv) mixtures thereof.
Claim 2
Dependent Claim
61 words
An anticorrosive pigment composition which comprises zinc oxide and a trivalent metal silicate material selected from the group consisting of (i) a material obtained by reacting a trivalent metal compound with a silicate (ii) a naturally occurring aluminium silicate material or a synthetic equivalent thereof, (iii) a naturally occurring or synthetic aluminium silicate surface-modified by ion exchange, and (iv) mixtures thereof.
Claim 3
Dependent Claim
21 words
A composition according to claim 1, wherein the trivalent metal is selected from the group consisting of aluminium, iron and chromium.
Claim 4
Dependent Claim
12 words
A composition according to claim 2, wherein the trivalent metal is aluminium.
Claim 5
Dependent Claim
37 words
A composition according to claim 3, wherein the metal silicate material is a reaction product prepared in aqueous solution from an aluminium salt selected from an acid phosphate, a sulphate or mixture thereof and a soluble silicate.
Claim 6
Dependent Claim
22 words
A composition according to any of claims 1 to 4, in which the metal silicate material is a hydrated aluminium silicate clay.
Claim 7
Dependent Claim
15 words
A composition according to claim 5, in which the metal silicate material is china clay.
Claim 8
Dependent Claim
21 words
A composition according to any of claims 1 to 6, wherein the zinc oxide comprises 2-30% by weight of the composition.
Claim 9
Dependent Claim
17 words
A composition according to claim 7, wherein the zinc oxide comprises 2-25% by weight of the composition.
Claim 10
Dependent Claim
17 words
A composition according to claim 7, wherein the zinc oxide comprises 10-25% by weight of the composition.
Claim 11
Dependent Claim
17 words
A composition according to claim 7, wherein the zinc oxide comprises 5-25% by weight of the composition.
Claim 12
Dependent Claim
20 words
A composition according to any of the preceding claims, wherein the zinc oxide has a particle size of 0.1-10 microns.
Claim 13
Dependent Claim
32 words
A substantially water-soluble-salt-free pigment comprising zinc oxide and a pigment material obtained by reacting an aluminium salt and a silicate in aqueous solution, and then separating, washing and drying the reaction product.
Claim 14
Dependent Claim
32 words
A substantially water-soluble-salt-free pigment comprising zinc oxide and a pigment material obtained by reacting an aluminium salt and a silicate in aqueous solution, and then separating, washing and drying the reaction product.
Claim 15
Dependent Claim
18 words
A salt-free pigment according to claim 12, in which the aluminium salt used is a phosphate or sulphate.
Claim 16
Dependent Claim
25 words
A composition according to any of the preceding claims, in which the silicon to trivalent metal atom ratio is in the range 0.2 - 30:1.
Claim 17
Dependent Claim
22 words
A composition according to claim 14, in which the silicon to trivalent metal atom ratio is in the range 0.5 - 10:1.
Claim 18
Dependent Claim
22 words
A composition according to claim 15, in which the silicon to trivalent metal atom ratio is in the range 0.5 - 5:1.
Claim 19
Dependent Claim
22 words
A composition according to claim 16, in which the silicon to trivalent metal atom ratio is in the range 0.5 - 3:1.
Claim 20
Dependent Claim
20 words
A coating composition which comprising a film forming material and a pigment composition according to any of the preceding claims.
Claim 21
Dependent Claim
16 words
A coating composition according to claim 18 wherein the film forming material is an alkyd primer.
Claim 22
Dependent Claim
13 words
A coating composition according to claim 18 or 19, which is water based.
Claim 23
Dependent Claim
14 words
A coating composition according to claim 18 or 19, which is organic solvent based.
Claim 24
Dependent Claim
18 words
A process for protecting a surface which comprises applying to the surface a composition according to claim 18.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.