Freeze-thaw stable paint formulation

Patent metadata

Field	Value
Publication number	US-9469776-B2
Application number	US-201615014069-A
Country	US
Kind code	B2
Filing date	Feb 3, 2016
Priority date	Nov 15, 2013
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

Abstract

The present invention relates to a pre-paint composite comprising an aqueous slurry of TiO 2 particles and a polymeric binder, wherein from 35 to 90 weight percent of the polymeric binder is attached to the TiO 2 particles, based on the weight of polymeric binder in the pre-paint composite. The pre-composite of the present invention is useful in paint compositions, particularly those that require freeze-thaw stability.

First claim

The invention claimed is:

1. A pre-paint composite comprising an aqueous dispersion of TiO 2 particles, a polymeric TiO 2 -adsorbing sulfur acid functionalized dispersant, and a polymeric binder, wherein from 35 to 90 weight percent of the polymeric binder is attached to the TiO 2 particles, based on the weight of polymeric binder in the pre-paint composite.

2. The pre-paint composite of claim 1 wherein from 60 to 85 weight percent of the polymeric binder is attached to the TiO 2 particles, based on the weight of polymeric binder in the pre-paint composite.

3. The pre-paint composite of claim 1 which further comprises a secondary alcohol ethoxylate of the formula C 12-14 H 26-30 O(CH 2 CH 2 O) x H; wherein x is from 15 to 50 and the O(CH 2 CH 2 O) x H group is bonded to a CH group on the C 12-14 H 26-30 chain.

4. The pre-paint composite of claim 2 which further comprises a secondary alcohol ethoxylate of the formula C 10-15 H 22-32 O(CH 2 CH 2 O) x H; wherein x is from 15 to 50 and the O(CH 2 CH 2 O) x H group is bonded to a CH group on the C 10-15 H 22-32 chain.

5. The pre-paint composite of claim 4 wherein x is from 20 to 40.

6. The pre-paint composite of claim 1 wherein the polymer binder is a copolymer of 1) styrene or methyl methacrylate; and 2) a C 1 -C 10 -alkyl acrylate; and 3) a carboxylic acid containing monomer.

7. The pre-paint composite of claim 1 wherein the polymeric TiO 2 -adsorbing sulfur acid functionalized dispersant is an adsorbing amphoteric polymer.

8. The pre-paint composite of claim 1 wherein the adsorbing sulfur acid functionalized polymer comprises structural units of 2-acrylamido-2-methyl propanesulfonic acid or sulfoethyl methacrylate or salts thereof or a combination thereof.

9. The pre-paint composite of claim 7 wherein the adsorbing amphoteric polymer comprises structural units of dimethylaminoethyl methacrylate and 2-acrylamido-2-methyl propanesulfonic acid.

10. The pre-paint composite of claim 9 wherein adsorbing amphoteric polymer further comprises structural units of one or more water-soluble polymers selected from the group consisting of hydroxyethyl methacrylate, methacrylamide, acrylamide, methacrylic acid, and acrylic acid.

11. The pre-paint composite of claim 1 wherein the binder is a styrene-butyl acrylate binder.

12. A pre-paint composite comprising an aqueous dispersion of a) TiO 2 particles; b) a polymeric TiO 2 -adsorbing sulfur acid functionalized dispersant; c) a secondary alcohol ethoxylate of the formula C 10-15 H 22-32 O(CH 2 CH 2 O) x H, wherein x is from 15 to 50 and the O(CH 2 CH 2 O) x H group is bonded to a CH group on the C 10-15 H 22-32 chain; and d) a polymeric binder;
wherein from 35 to 90 weight percent of the polymeric binder is attached to the TiO 2 particles, based on the weight of polymeric binder in the pre-paint composite.

13. The pre-paint composite of claim 12 wherein the secondary alcohol ethoxylate is of the formula C 12-14 H 26-30 O(CH 2 CH 2 O) x H; wherein x is from 15 to 50 and the O(CH 2 CH 2 O) x H group is bonded to a CH group on the C 12-14 H 26-30 chain.

14. The pre-paint composite of claim 12 wherein the polymer binder is a copolymer of 1) styrene or methyl methacrylate; and 2) a C 1 -C 10 -alkyl acrylate; and 3) a carboxylic acid containing monomer.

15. The pre-paint composite of claim 12 wherein x is from 20 to 40.

16. The pre-paint composite of claim 12 wherein the sulfur acid functionalized polymer is an adsorbing amphoteric polymer.

17. The pre-paint composite of claim 16 wherein the adsorbing sulfur acid functionalized polymer comprises structural units of 2-acrylamido-2-methyl propanesulfonic acid or sulfoethyl methacrylate or salts thereof or a combination thereof.

18. The pre-paint composite of claim 17 wherein the adsorbing amphoteric polymer comprises structural units of dimethylaminoethyl methacrylate and 2-acrylamido-2-methyl propanesulfonic acid.

19. The pre-paint composite of claim 15 wherein the binder is a styrene-butyl acrylate binder.

Assignees

• Rohm & Haas

Inventors

• Kelly david g
• Luo Pu
• Rhodes Michael
• Tiwary Yogesh

Classifications

• C09D7/63

  organic · CPC title

• C08F2/44

  Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers · CPC title

• C09D17/002

  in organic medium (C09D17/003, C09D17/004 take precedence) · CPC title

• C09D5/024

  characterised by the additives · CPC title

• C09D7/62

  modified by treatment with other compounds · CPC title