Matting paste composition

Patent metadata

Field	Value
Publication number	US-10370519-B2
Application number	US-201615242884-A
Country	US
Kind code	B2
Filing date	Aug 22, 2016
Priority date	Jul 24, 2012
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

The invention is directed to a matting paste composition comprising: a) thermoplastic non-hydroxy-functional acrylic resin; b) hindered amine light stabilizer; c) UV absorber; d) amorphous, untreated fumed silica, flattener; and e) one or more organic solvents.

First claim

What is claimed is:

1. A matting paste composition comprising:
a) a styrene, methyl methacrylate and/or butyl methacrylate thermoplastic non-hydroxy-functional acrylic resin having a weight average molecular weight in the range from about 50,000 to about 100,000 and present in an amount in the range of from about 15 to about 35%, based on the total weight of the matting paste composition;
b) hindered amine light stabilizer present in an amount in the range of from about 1.5 to about 8%, based on the total weight of the matting paste composition;
c) UV absorber present in an amount in the range of from about 2 to about 8%, based on the total weight of the matting paste composition;
d) amorphous, untreated fumed silica, flattener present in an amount in the range of from about 7 to about 13%, based on the total weight of the matting paste composition;
e) one or more organic solvents present in an amount in the range of from 40 to 60%, based on the total weight of the matting paste composition;
f) from about 2% to about 14% castor oil based on the total weight of the matting paste composition, wherein the castor oil is a triglyceride of 90% ricinoleic acid, having a molecular weight of about 900, a refractive index of 1.4775, and an OH value of 164; and
g) wherein the matting paste composition is used to prepare a 2K polyurethane coating having a gloss in the range of 15 to 45 gloss units at 60° angle.

2. The matting paste according to claim 1 , wherein the matting paste composition is free of extender pigments.

3. The matting paste according to claim 1 , wherein the styrene, methyl methacrylate and/or butyl methacrylate thermoplastic non-hydroxy-functional acrylic resin has a Tg in the range of from 50-100° C.

4. The matting paste according to claim 1 , wherein the hindered amine light stabilizer is selected from the group consisting of Bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, methyl (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, and combinations thereof.

5. The matting paste according to claim 1 , wherein the UV absorber is a benzotriazol type absorber.

6. The matting paste according to claim 1 , wherein the organic solvent is selected from the group consisting of t-butyl acetate, parachlorobenzotrifluoride, methyl amyl ketone, ethyl 3-ethoxy propionate, and combinations thereof.

7. A liquid coating composition comprising the matting paste composition according to claim 1 .

8. A liquid coating composition according to claim 7 , wherein the coating composition is a topcoat or a clearcoat.

9. A matting paste composition comprising:
a) a styrene, methyl methacrylate and/or butyl methacrylate thermoplastic styrene non-hydroxy-functional acrylic resin having a weight average molecular weight in the range from about 50,000 to about 100,000 and present in an amount in the range of from about 15 to about 35 %, based on the total weight of the matting paste composition;
b) hindered amine light stabilizer present in an amount in the range of from about 1.5 to about 8%, based on the total weight of the matting paste composition;
c) UV absorber present in an amount in the range of from about 2 to about 8%, based on the total weight of the matting paste composition;
d) amorphous, untreated fumed silica, flattener present in an amount in the range of from about 7 to about 13%, based on the total weight of the matting paste composition; and
e) one or more organic solvents present in an amount in the range of from 40 to 60%, based on the total weight of the matting paste composition.

10. The matting paste according to claim 9 , wherein the matting paste composition is free of extender pigments.

11. The matting paste composition according to claim 9 , further comprising an additive selected from the group consisting of castor oil, a low Tg acrylic or polyester, and combinations thereof.

12. The matting paste according to claim 9 , wherein the styrene, methyl methacrylate and/or butyl methacrylate thermoplastic non-hydroxy-functional acrylic resin has a Tg in the range of from 50-100° C.

13. The matting paste according to claim 9 , wherein the hindered amine light stabilizer is selected from the group consisting of Bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, methyl (1,2,2,6,6-pentamethy -4-piperidyl) sebacate, and combinations thereof.

14. The matting paste according to claim 9 , wherein the UV absorber is a benzotriazol type absorber.

15. The matting paste according to claim 9 , wherein the organic solvent is selected from the group consisting of t-butyl acetate, PCBTF, MAK, EEP, and combinations thereof.

16. A liquid coating composition comprising the matting paste composition according to claim 9 .

17. A liquid coating composition according to claim 16 , wherein the coating composition is a 2K polyurethane coating having a gloss in the range of 0 to 60 gloss units at 60° angle.

18. A liquid coating composition according to claim 16 , wherein the coating composition is a topcoat or a clearcoat.

Assignees

• Akzo Nobel Coatings Int Bv

Inventors

• Rhoades Toolika
• Blair Justin

Classifications

• C08K3/36

  Silica · CPC title

• C09D17/00

  Pigment pastes, e.g. for mixing in paints (artists' paints C09D5/06) · CPC title

• C08K5/3435

  Piperidines · CPC title

• C08K5/3475

  condensed with carbocyclic rings · CPC title

• C09D7/48

  Stabilisers against degradation by oxygen, light or heat · CPC title