Coating dispersion

Patent metadata

Field	Value
Publication number	US-9284468-B2
Application number	US-201314401028-A
Country	US
Kind code	B2
Filing date	Jun 7, 2013
Priority date	Jun 14, 2012
Publication date	Mar 15, 2016
Grant date	Mar 15, 2016

Abstract

A dispersion having from one to sixty percent by weight of total dispersion of a solids component dispersed in an organic continuous phase is useful as a coating for substrates. The solids component contains 40-95 weight-percent of a polyolefin containing only carbon and hydrogen and that has a number average molecular weight that is greater than 400 gram per mole, 5-40 weight-percent of an amine salt of a functionalized polyolefin; and 0-20 weight-percent of optional additives, wherein weight-percent is based on total weight of solids and wherein the dispersed particles have an average particle size of less than 35 micrometers and the organic phase is a dispersion support medium for the polyolefin and amine salt of a functionalized polyolefin.

First claim

The invention claimed is:

1. A dispersion comprising from one to sixty percent by weight of total dispersion of a solids component dispersed in an organic continuous phase wherein the solids component comprises a blend of:
a. 40-95 percent by weight of a polyolefin containing only carbon and hydrogen and having a number-average molecular weight greater than 400 grams per mole as determined by gel permeation chromatography;
b. 5-40 percent by weight of an amine salt of a functionalized polyolefin; and
c. 0-20 percent by weight of optional additives;

wherein the percent by weight of the polyolefin component (a), the amine salt of a functionalized polyolefin (b) and optional additives (c) are relative to total solids weight, the solids are dispersed as particles and the polyolefin component (a) and the amine salt of a functionalized polyolefin (b) have an average particle size as determined by optical microscopy of less than 35 micrometers and wherein the organic continuous phase is a dispersion support medium for polyolefin (a) and amine salt of a functionalized polyolefin (b), the organic continuous phase consisting of any one or any combination of components selected from a group consisting of alcohols, esters, ketones, ethers, and hydrocarbons.

2. The dispersion of claim 1 , wherein the dispersion contains 30 percent by weight or more solids based on total dispersion weight.

3. The dispersion of claim 1 , wherein the amine salt is a secondary or tertiary amine salt.

4. The dispersion of claim 1 , wherein the optional additives include a crosslinker that is reactive with the amine salt of the functionalized polyolefin.

5. The dispersion of claim 4 , wherein the functionalized polyolefin is selected from polyolefins containing functionalities selected from protonated and non-protonated acid groups and acid salt.

6. The dispersion of claim 1 , further characterized as being free of vinyl chloride polymers.

7. A method for preparing the dispersion of claim 1 , the method comprising preparing an aqueous dispersion of the polyolefin component (a) and the amine salt of a functionalized polyolefin (b), spray drying the dispersion to isolate the polyolefin component (a) and the amine salt of a functionalized polyolefin (b) as a powder and then dispersing the polyolefin component (a) and the amine salt of a functionalized polyolefin (b) into the organic continuous phase.

8. A method for coating a substrate comprising disposing the dispersion of claim 1 onto the substrate.

9. The method of claim 8 , wherein the substrate is a metal.

10. The method of claim 9 , wherein the metal is shaped into a can either before or after disposing the dispersion of claim 1 onto the metal.

Assignees

• Dow Global Technologies Llc

Inventors

• Tang Houxiang
• Kainz Bernhard
• Hong Liang
• Lundgard Richard A

Classifications

• C09D123/10 Primary

  Homopolymers or copolymers of propene · CPC title

• C09D123/12 Primary

  Polypropene · CPC title

• B05D7/14

  to metal, e.g. car bodies (involving a chemical reaction between the metal and the coating C23) · CPC title

• C08L51/06

  grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond · CPC title

• C08L23/0869

  with unsaturated acids, e.g. [meth]acrylic acid; with unsaturated esters, e.g. [meth]acrylic acid esters · CPC title