Aqueous composition containing suspended zno particles

Patent metadata

Field	Value
Publication number	US-2017233646-A1
Application number	US-201515504371-A
Country	US
Kind code	A1
Filing date	Sep 11, 2015
Priority date	Sep 12, 2014
Publication date	Aug 17, 2017
Grant date	—

Abstract

The invention relates to an aqueous composition comprising a suspension of ZnO particles and a polymer stabiliser containing carboxylic acid functions and carboxylic acid salt functions.

First claim

1 . An aqueous composition comprising a suspension of ZnO particles and a polymer stabilizer containing carboxylic acid functions and carboxylic acid salt functions.

2 . The composition according to claim 1 , wherein the polymer stabilizer is a copolymer of (meth)acrylic acid and a (meth)acrylic acid salt.

3 . The composition according to claim 1 , wherein the polymer stabilizer is a mixture of a (meth)acrylic acid polymer and a (meth)acrylic acid salt polymer.

4 . The composition according to claim 1 , wherein the molar ratio of carboxylic acid functions to carboxylic acid salt functions is included between 25/75 and 75/25.

5 . The composition according to claim 1 , wherein the polymer stabilizer is a mixture of a (meth)acrylic acid polymer and a (meth)acrylic acid salt polymer, where this mixture has a mass ratio included between 25/75 and 75/25.

6 . The composition according to claim 1 , wherein the stabilizer represents 0.01 to 10% by weight relative to the weight of the aqueous composition.

7 . The composition according to claim 1 , wherein the ZnO particles represent 0.1 to 20% by weight relative to the weight of the aqueous composition.

8 . The composition according to claim 1 , comprising between 0.5 and 0.7% by weight of polymer stabilizer;
wherein the polymer stabilizer is constituted of a mixture of:
poly((meth)acrylic acid) having a molecular weight less than or equal to 240,000 g/mol; and of
poly(methacrylic acid sodium salt) having a molecular weight less than or equal to 240,000 g/mol.

9 . The composition according to claim 1 , wherein said composition is dehydrated.

10 . A method for preparing the composition according to claim 1 , comprising the following steps:
preparing an aqueous solution comprising a polymer stabilizer containing carboxylic acid functions and carboxylic acid salt functions; adding a zinc precursor; forming ZnO particles by hydrolysis of the zinc precursor; and producing aqueous composition comprising a suspension of ZnO particles and a polymer stabilizer.

11 . The method according to claim 10 , wherein the zinc precursor is chosen from the group consisting of ZnR 2 ; Zn(OR) 2 ; Zn(NR 2 ) 2 ; and Zn(O—C(═O)R 2 ; R being a hydrocarbon group comprising 1 to 18 carbon atoms.

12 . A method of preparing an article selected from the group consisting of photovoltaic cells, paint, cosmetics, textiles, electronics, biosensors, and anti-microbial and anti-fouling coatings, the method comprising using the composition according to claim 1 to prepare the article.

13 . The composition according to claim 1 , wherein the polymer stabilizer is selected from:
a copolymer of (meth)acrylic acid and a (meth)acrylic acid salt; and a mixture comprising a (meth)acrylic acid polymer and a (meth)acrylic acid salt polymer.

14 . The composition according to claim 13 , wherein the stabilizer represents 0.01 to 10% by weight relative to the weight of the aqueous composition.

15 . The composition according to claim 13 , wherein the molar ratio of carboxylic acid functions to carboxylic acid salt functions is included between 25/75 and 75/25.

16 . The composition according to claim 15 , wherein the ZnO particles represent 0.1 to 20% by weight relative to the weight of the aqueous composition.

17 . The composition according to claim 15 , wherein the stabilizer represents 0.01 to 10% by weight relative to the weight of the aqueous composition.

18 . The composition according to claim 17 , wherein the ZnO particles represent 0.1 to 20% by weight relative to the weight of the aqueous composition.

19 . The composition according to claim 1 , wherein:
the molar ratio of carboxylic acid functions to carboxylic acid salt functions is included between 25/75 and 75/25; the ZnO particles represent 0.1 to 20% by weight relative to the weight of the aqueous composition; and the polymer stabilizer represents 0.5 to 0.7% by weight relative to the aqueous composition, and said polymer stabilizer is constituted of a mixture of:
poly((meth)acrylic acid) having a molecular weight less than or equal to 240,000 g/mol; and of
poly(methacrylic acid sodium salt) having a molecular weight less than or equal to 240,000 g/mol.

20 . The method according to claim 12 , comprising dehydrating the composition.

Assignees

• Univ Claude Bernard Lyon
• Centre Nat Rech Scient

Inventors

• Daniele Stéphane
• Valette Audrey
• Cornier Thibaut

Classifications

• H01L31/055

  Electricity · mapped topic

• C09K11/02

  Use of particular materials as binders, particle coatings or suspension media therefor · CPC title

• C08L33/02

  Homopolymers or copolymers of acids; Metal or ammonium salts thereof · CPC title

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title

• C09K11/54 Primary

  containing zinc or cadmium · CPC title