Shelf-stable aqueous composition and process of making the same

Patent metadata

Field	Value
Publication number	US-10717879-B2
Application number	US-201515761540-A
Country	US
Kind code	B2
Filing date	Sep 30, 2015
Priority date	Sep 30, 2015
Publication date	Jul 21, 2020
Grant date	Jul 21, 2020

Abstract

A shelf-stable aqueous binder composition, a process of preparing the binder composition, and a coating composition comprising the binder composition and having fast drying properties and developing good early resistance to water washout.

First claim

What is claimed is:

1. A shelf-stable aqueous composition, comprising:
(a) an aqueous dispersion of an anionically stabilized polymer,
(b) a water soluble polyfunctional amine polymer, and
(c) a suspension or dispersion of a phyllosilicate in a volatile base, wherein the concentration of the phyllosilicate in the suspension or dispersion of the phyllosilicate in the volatile base is from 1% to 18% by weight, based on the total weight of the suspension or dispersion of the phyllosilicate in the volatile base, and
wherein the volatile base is used in an amount such that the composition has a pH wherein substantially all the polyfunctional amine polymer is in a non-ionic state.

2. The shelf-stable aqueous composition of claim 1 , wherein the phyllosilicate in the composition is present in an amount of from 0.1% to 1% by solids weight, based on the weight of the aqueous dispersion of an anionically stabilized polymer.

3. The shelf-stable aqueous composition of claim 1 , wherein the phyllosilicate comprises a sodium magnesium silicate, sodium lithium magnesium silicate, a sodium magnesium mixed silicate, laponite, magnesium lithium silicate or mixtures thereof.

4. The shelf-stable aqueous composition of claim 1 , wherein the particle size of the phyllosilicate ranges from 10 nm to 500 nm.

5. The shelf-stable aqueous composition of claim 1 , wherein the polyfunctional amine polymer has from 20% to 100% by weight of the monomer units containing an amine group, based on the weight of the polyfunctional amine polymer.

6. The shelf-stable aqueous composition of claim 1 , wherein the polyfunctional amine polymer is present in an amount of from 0.1% to 4% by solids weight, based on the solids weight of the anionically stabilized polymer.

7. The shelf-stable aqueous composition of claim 1 , having a solids content of from 40% to 65% by weight.

8. The shelf-stable aqueous composition of claim 1 , wherein the anionically stabilized polymer is selected from an acrylic polymer, a styrene-acrylic copolymer, or mixtures thereof.

9. The shelf-stable aqueous composition of claim 1 , wherein the pH of the composition is in the range of 9.5 to 14.

10. The shelf-stable aqueous composition of claim 1 , wherein the volatile base is selected from ammonia, morpholine, a C 1 -C 5 alkyl amine, 2-dimethylaminoethanol, N-methylmorpholine, ethylenediamine, or mixtures thereof.

11. The shelf-stable aqueous composition of claim 1 , wherein the composition is obtained by
providing the aqueous dispersion of an anionically stabilized polymer,
providing the water soluble polyfunctional amine polymer;
dispersing the phyllosilicate in a volatile base to form a suspension or dispersion; and
admixing the aqueous dispersion of an anionically stabilized polymer, the water soluble polyfunctional amine polymer, and the phyllosilicate suspension or dispersion.

12. A process of preparing a shelf-stable aqueous composition, comprising admixing:
(a) an aqueous dispersion of an anionically stabilized polymer,
(b) a water soluble polyfunctional amine polymer, and
(c) a suspension or dispersion of a phyllosilicate in a volatile base to form the shelf-stable aqueous composition, wherein the concentration of the phyllosilicate is from 1% to 18% by weight, based on the total weight of the suspension or dispersion, and
wherein the volatile base is used in an amount such that the composition has a pH wherein substantially all the polyfunctional amine polymer is in a non-ionic state.

13. The process of claim 12 , wherein the aqueous dispersion of anionically stabilized polymer dispersion and the phyllosilicate suspension or dispersion are firstly mixed, and then mixed with the polyfunctional amine polymer.

14. A coating composition comprising a shelf-stable aqueous composition of claim 1 .

15. The coating composition of claim 14 , further comprising pigments, fillers, thickeners, coalescents, colorants, dispersants, wetting agents, defoamers, or mixtures thereof.

16. The coating composition of claim 1 having a shelf-stability of at least 3 months when stored at room temperature.

Assignees

• Dow Global Technologies Llc
• Rohm & Haas

Inventors

• Zhan fu
• Zheng Baoqing
• Hua Zhi Gang
• Li Yaobang
• Yang Yurun

Classifications

• C09D133/14 Primary

  of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen · CPC title

• C09D133/06

  of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical · CPC title

• C09D7/40

  Additives · CPC title

• C09D5/028 Primary

  Pigments; Filters · CPC title

• C09D133/08

  Homopolymers or copolymers of acrylic acid esters · CPC title