Coating compositions

Patent metadata

Field	Value
Publication number	US-9481808-B2
Application number	US-201313840336-A
Country	US
Kind code	B2
Filing date	Mar 15, 2013
Priority date	Jul 26, 2012
Publication date	Nov 1, 2016
Grant date	Nov 1, 2016

Abstract

Coating compositions comprising:
(i) a water reducible monomer modified alkyd obtained by the acidolysis of a polyalkylene terephthalate or polyalkylene napthanate and subsequent monomer modification and (ii) a latex having an average particle size greater than 200 nm and (iii) a small particle size latex having an average particle size less than 110 nm.

First claim

The invention claimed is:

1. A. coating composition comprising:
(i) a water reducible monomer modified alkyd obtained by the acidolysis of a polyalkylene terephthalate or polyalkylene naphthalate and subsequent monomer modification to produce a polymer having an acid value of from about 0.01 to about 30;
(ii) a latex having an average particle size of about 200 nm to about 320 nm, wherein the latex comprises either (a) a single stage polymer that does not have a core/shell particle arrangement, (b) a core/shell particle arrangement wherein a relatively lower Tg polymer comprises the core and a relatively higher Tg material comprises the shell, or (c) a combination thereof; and
(iii) a small particle size latex having an average particle size of about 70 to about 110 nm;
wherein;
the alkyd (i) is present at a level of about 10 to about 30%;
the latex (ii) is present at a level of about 60 to about 85%; and
the latex(iii) is present at a level of about 5 to about 20%, on a weight solids basis based upon the total weight solids of (i) plus (ii) plus (iii).

2. The coating composition of claim 1 wherein the polyalkylene terephthalate is polyethylene terephthalate.

3. The coating of claim 1 wherein the alkyd has drying oil or semi-drying oil functionality.

Assignees

• Sherwin Williams Co

Inventors

• Zychowski Frank D
• Fox Christopher J
• Rao Madhukar
• Marlow James K

Classifications

• C09D155/005

  Homopolymers or copolymers obtained by polymerisation of macromolecular compounds terminated by a carbon-to-carbon double bond · CPC title

• C09D167/08 Primary

  Polyesters modified with higher fatty oils or their acids, or with natural resins or resin acids · CPC title

• C08F283/01

  on to unsaturated polyesters {(C08F283/004 takes precedence)} · CPC title

• C08F290/141

  Polyesters; Polycarbonates · CPC title

• C08F290/061

  Polyesters; Polycarbonates · CPC title