ANTI-CORROSION PIGMENTS MADE OF ALUMINIUM POLYPHOSPHATE AND RARE EARTH

• US 20180127588A1
• Filed: 04/07/2016
• Published: 05/10/2018
• Est. Priority Date: 04/08/2015
• Status: Active Grant

• Current Assignee: Société Nouvelle des Couleurs Zinciques
• Original Assignee: Société Nouvelle des Couleurs Zinciques
• Inventors: BERTELOOT, Christelle, MAVEL, Ludovic
• Granted Patent: US 10,442,933 B2
• Time in Patent Office: Days
• CPC Class Codes: C01B 25/40 Polyphosphates
• CPC Class Codes: C01F 17/224 Oxides or hydroxides of lanthanides
• CPC Class Codes: C01F 17/229 Lanthanum oxides or hydroxides
• CPC Class Codes: C01F 17/235 Cerium oxides or hydroxides
• CPC Class Codes: C08K 2003/221 of rare earth metal
• CPC Class Codes: C09B 67/0007 with inorganic coatings
• CPC Class Codes: C09B 69/001 Dyes containing an onium group attached to the dye skeleton via a bridge
• CPC Class Codes: C09C 1/40 Compounds of aluminium C09C1/0009, C09C1/0015, C09C1/0078, C09C1/32 take precedence
• CPC Class Codes: C09C 1/64 Aluminium
• CPC Class Codes: C09D 163/00 Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
• CPC Class Codes: C09D 167/00 Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain based on polyester-amides C09D177/12; based on polyester-imides C09D179/08; Coating compositions based on derivatives of such polymers
• CPC Class Codes: C09D 175/04 Polyurethanes
• CPC Class Codes: C09D 5/084 Inorganic compounds
• CPC Class Codes: C09D 7/61 inorganic

Abstract

An anticorrosive pigment comprising an aluminum polyphosphate comprises at least one cerium-based compound and/or one lanthanum-based compound and/or one praseodymium-based compound. An anticorrosive paint incorporating the pigment is also provided.

Claims

1. An anticorrosive pigment comprising an aluminum polyphosphate, comprising at least one cerium-based compound and/or one lanthanum-based compound and/or one praseodymium-based compound.

2. The anticorrosive pigment as claimed in claim 1, wherein the aluminum polyphosphate is an aluminum tripolyphosphate.

3. The anticorrosive pigment as claimed in claim 1, wherein the compound is an oxide.

4. The anticorrosive pigment as claimed in claim 1, wherein the compound is a carbonate.

5. The anticorrosive pigment as claimed in claim 3, comprising a cerium oxide.

6. The anticorrosive pigment as claimed in claim 5, comprising cerium oxide CeO₂.

7. The anticorrosive pigment as claimed in claim 3, comprising a lanthanum oxide.

8. The anticorrosive pigment as claimed in claim 7, comprising lanthanum oxide La₂O₃.

9. The anticorrosive pigment as claimed in claim 3, comprising a praseodymium oxide.

10. The anticorrosive pigment as claimed in claim 9, comprising praseodymium oxide Pr₆O₁₁.

11. The anticorrosive pigment as claimed in claim 1, comprising a mixture of cerium-based compound and of lanthanum-based compound.

12. The anticorrosive pigment as claimed in claim 1, comprising a mixture of cerium-based compound and of praseodymium-based compound.

13. The anticorrosive pigment as claimed in claim 1, comprising a mixture of lanthanum-based compound and of praseodymium-based compound.

14. The anticorrosive pigment as claimed in claim 1, comprising a mixture of cerium-based compound and of lanthanum-based compound and of praseodymium-based compound.

15. The anticorrosive pigment as claimed in claim 1, comprising a percentage by weight of compound(s) based on rare earth metal of between 1% and 30%.

16. An anticorrosive paint intended to cover a metal surface, comprising an anticorrosive pigment as claimed in claim 1.

17. The anticorrosive paint as claimed in claim 16, wherein it is based on polyester-melamine.

18. The anticorrosive paint as claimed in claim 16, wherein it is based on polyurethane.

19. The anticorrosive paint as claimed in claim 16, wherein it is epoxy-based.

20. The anticorrosive paint as claimed in claim 16, comprising a percentage by weight of anticorrosive pigment of between 1% and 15%.