Coating compositions

Patent metadata

Field	Value
Publication number	US-11401425-B2
Application number	US-201916658837-A
Country	US
Kind code	B2
Filing date	Oct 21, 2019
Priority date	Oct 22, 2018
Publication date	Aug 2, 2022
Grant date	Aug 2, 2022

Abstract

The present disclosure provides for an aqueous dispersion for use in coating applications. The aqueous dispersion includes an aqueous composition and a solid content of a melt blend product having an acid functionalized polypropylene base polymer, a polypropylene copolymer, an acid functionalized polypropylene wax and an acid functionalized polyolefin. The aqueous dispersion is included in a coating composition, where the coating composition includes the aqueous dispersion, a solvent, a crosslinker and a basic water composition having water and a base. The present disclosure also provides for a coated article having a substrate and a coating on the substrate, where the coating includes the coating composition of the present disclosure.

First claim

What is claimed:

1. An aqueous dispersion, comprising:
a solid content from 15 weight percent (wt %) to 60 wt % based on a total weight of the aqueous dispersion, the solid content comprises a melt blend product having:
15 to 60 wt % of an acid functionalized polypropylene base polymer having a melting point of 155° C. to 170° C.;
16 to 50 wt % of a polypropylene copolymer having a density of less than 0.88 grams/cubic centimeter (g/cm 3 );
5 to 20 wt % of an acid functionalized polypropylene wax; and
15 to 30 wt % of an acid functionalized polyolefin, wherein the wt % is based on a total weight of the melt blend product and components of the melt blend product add to 100 wt %; and

an aqueous composition.

2. The aqueous dispersion of claim 1 , wherein the melt blend product includes 20 to 55 wt % of the acid functionalized polypropylene base polymer having the melting point of 155° C. to 170° C.

3. The aqueous dispersion of claim 1 , wherein the melt blend product includes 26 to 46 wt % of the acid functionalized polypropylene base polymer having the melting point of 155° C. to 170° C.

4. The aqueous dispersion of claim 1 , wherein the acid functionalized polypropylene base polymer having the melting point of 155° C. to 170° C. has an acid number of 2 to 15.

5. The aqueous dispersion of claim 1 , wherein the acid functionalized polypropylene base polymer has a melting point of 160° C. to 170° C.

6. The aqueous dispersion of claim 1 , wherein the acid functionalized polypropylene base polymer has a melting point of 162° C. to 167° C.

7. The aqueous dispersion of claim 1 , wherein the melt blend product includes 17-45 wt % of the polypropylene copolymer having a density of less than 0.88 g/cm 3 .

8. The aqueous dispersion of claim 1 , wherein the melt blend product includes 5 to 15 wt % of the acid functionalized polypropylene wax.

9. The aqueous dispersion of claim 1 , wherein the melt blend product includes 9 to 11 wt % of the acid functionalized polypropylene wax.

10. The aqueous dispersion of claim 1 , wherein the melt blend product includes 15 to 25 wt % of the acid functionalized polyolefin.

11. The aqueous dispersion of claim 1 , wherein the melt blend product includes 19 to 25 wt % of the acid functionalized polyolefin.

12. The aqueous dispersion of claim 1 , wherein the acid functionalized polypropylene wax is maleic anhydride modified polypropylene wax.

13. The aqueous dispersion of claim 1 , wherein the polypropylene copolymer having a density of less than 0.88 g/cm 3 is formed with propylene and ethylene, wherein the polypropylene copolymer has a melt index value, as determined by ASTM D-1238 at 230° C. and 2.16 kg, of about 25 g/10 min and a glass transition temperature of about −26° C.

14. The aqueous dispersion of claim 1 , wherein the acid functionalized polyolefin is an ethylene-acrylic acid copolymer.

15. The aqueous dispersion of claim 1 , wherein the acid functionalized polypropylene base polymer having a melting point of 155° C. to 170° C. is an anhydride modified polypropylene.

16. The aqueous dispersion of claim 1 , further including 0.1 to 10 wt % of a polyethylene wax, wherein the wt % is based on the total weight of the melt blend product.

17. A coating composition, comprising:
15 to 100 wt % of the aqueous dispersion of claim 1 based on total weight of the coating composition;
a solvent, wherein the solvent is from 0 wt % to 80 wt % based on the solid content of the aqueous dispersion used to make the coating composition;
a crosslinker, wherein the crosslinker is from 0 wt % to 6 wt % based on the solid content of the aqueous dispersion used to make the coating composition;
a basic water composition comprising from 90 to 99.99 wt % of water based on a total weight of the basic water composition and from 0.01 percent to 10 wt % of a base based on the total weight of the basic water composition, wherein the basic water composition is from 0 wt % to 85 wt % of the coating composition based on a total weight of the coating composition.

18. The coating composition of claim 17 , wherein the crosslinker comprises a hydroxylalkyl hydroxyalkyl amide.

19. A coated article comprising a substrate and a coating on the substrate, wherein the coating includes the coating composition of claim 17 .

20. A coated article comprising a substrate and a cured coating on the substrate, wherein the cured coating is formed by curing the coating composition of claim 17 .

Assignees

• Dow Global Technologies Llc

Inventors

• Tang Houxiang
• Malotky David L
• Drumright Ray E
• Schaffer Nicholas B
• Stants Cynthia
• Kainz Bernhard

Classifications

• C08L23/14 Primary

  Copolymers of propene (C08L23/16 takes precedence) · CPC title

• C09D7/65

  macromolecular (C09D7/41-C09D7/48 take precedence) · CPC title

• C08L23/26

  modified by chemical after-treatment (saponified copolymers C08L23/0861; unsaturated acid salts C08L23/0876) · CPC title

• C08L33/064

  containing anhydride, COOH or COOM groups, with M being metal or onium-cation · CPC title

• C08L23/147 Primary

  with monomers containing atoms other than carbon or hydrogen · CPC title