Coated substrates prepared with waterborne sealer and primer compositions

Patent metadata

Field	Value
Publication number	US-2017136493-A1
Application number	US-201514943133-A
Country	US
Kind code	A1
Filing date	Nov 17, 2015
Priority date	Nov 17, 2015
Publication date	May 18, 2017
Grant date	—

Abstract

The present invention provides multilayer coated substrates, prepared using primer and/or sealer compositions comprising waterborne curable film-forming compositions, in turn comprising:
a) an aqueous dispersion of a pigment and
i) polymeric urethane-shell particles having a care-shell morphology and having hydroxyl functional groups, wherein the core is prepared from a monomer mixture comprising hydrophobic, ethylenically unsaturated monomers and the shell comprises a polyurethane or polyurethane-urea polymer; or ii) polymeric acrylic-shell particles having a core-shell morphology and having hydroxyl functional groups, wherein the core is prepared from a monomer mixture comprising hydrophobic, ethylenically unsaturated monomers and the shell is prepared from a monomer mixture comprising hydrophilic, ethylenically unsaturated monomers;
b) a polyisocyanate crosslinking agent; and optionally c) a hydroxyl functional, water dispersible acrylic polymer.

First claim

Therefore, We claim:

1 . A multilayer coated substrate comprising:
A) a substrate; B) a primer composition applied directly to a surface of the substrate, forming a first coating; C) a sealer composition applied on top of the first coating; and D) at least one topcoat applied on top of the sealer composition;
wherein the sealer composition comprises a waterborne curable film-forming composition, the waterborne curable film-forming composition comprising:
a) a first component comprising an aqueous dispersion of a pigment and
i) polymeric urethane-shell particles having a core-shell morphology and having hydroxyl functional groups, wherein the core of the polymeric urethane-shell particles is prepared from a monomer mixture comprising hydrophobic, ethylenically unsaturated monomers and wherein the shell of the polymeric urethane-shell particles comprises a polyurethane or polyurethane-urea polymer; or
ii) polymeric acrylic-shell particles having a core-shell morphology and having hydroxyl functional groups, wherein the core of the polymeric acrylic-shell particles is prepared from a monomer mixture comprising hydrophobic, ethylenically unsaturated monomers and wherein the shell of the polymeric acrylic-shell particles is prepared from a monomer mixture comprising hydrophilic, ethylenically unsaturated monomers;

b) a second component comprising a polyisocyanate crosslinking agent; and optionally
c) a hydroxyl functional, water dispersible acrylic polymer.

2 . The multilayer coated substrate according to claim 1 , wherein the primer composition comprises a waterborne curable film-forming composition, the waterborne curable film-forming composition comprising:
a) a first component comprising an aqueous dispersion of a pigment and
i) polymeric urethane shell particles having a core-shell morphology and having hydroxyl functional groups, wherein the core of the polymeric urethane-shell particles is prepared from a monomer mixture comprising hydrophobic, ethylenically unsaturated monomers and wherein the shell of the polymeric urethane-shell particles comprises a polyurethane or polyurethane-urea polymer; or
ii) polymeric acrylic-shell particles having a core-shell morphology and having hydroxyl functional groups, wherein the core of the polymeric acrylic shell particles is prepared from a monomer mixture comprising hydrophobic, ethylenically unsaturated monomers and wherein the shell of the polymeric acrylic-shell particles is prepared from a monomer mixture comprising hydrophilic, ethylenically unsaturated monomers;
b) a second component comprising a polyisocyanate crosslinking agent; and optionally c) a hydroxyl functional, water dispersible acrylic polymer.

3 . The multilayer coated substrate according to claim 2 , wherein the primer composition is applied in no more than two coats and demonstrates a dry film thickness of 50 to 150 microns.

4 . The multilayer coated substrate according to claim 1 , wherein the first component in the waterborne curable film-forming composition comprises an aqueous dispersion of a pigment and the polymeric urethane-shell particles of i), wherein the core of the polymeric urethane-shell particles is prepared from a monomer mixture comprising: 1) at least one of n-butyl (meth)acrylate, isobutyl (meth)acrylate, lauryl (meth)acrylate, 2-ethylhexyl (meth) acrylate, stearyl (meth) acrylate, isobornyl (meth)acrylate, cyclohexyl (meth)acrylate, and styrene, and further optionally comprising: 2) at least one of hydroxyethyl (meth)acrylate and hydroxypropyl (meth)acrylate.

5 . The multilayer coated substrate according to claim 1 , wherein the first component in the waterborne curable film-forming composition comprises an aqueous dispersion of a pigment and the polymeric acrylic-shell particles of ii), wherein the core of the polymeric acrylic-shell particles is prepared from a monomer mixture comprising: 1) at least one of n-butyl (meth)acrylate, isobutyl (meth)acrylate, lauryl (meth)acrylate, 2-ethylhexyl (meth) acrylate, stearyl (meth) acrylate, isobornyl (meth)acrylate, cyclohexyl (meth)acrylate, and styrene, and further optionally comprising: 2) at least one of hydroxyethyl (meth)acrylate and hydroxypropyl (meth)acrylate; and wherein the shell of the polymeric acrylic shell particles is prepared from a monomer mixture comprising at least one of methoxypolyethylene glycol (meth)acrylate, (meth)acrylic acid, crotonic acid, itaconic acid, maleic acid, fumaric acid, hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, hydroxy functional adducts of caprolactone, methyl (meth)acrylate, (meth)acrylonitrile, dimethylaminoethyl(meth)acrylate, isopropyl (meth)acrylamide, dimethylaminoethyl (meth)acrylate, diethylaminoethyl (math)acrylate, and ethylene glycol dimethacrylate.

6 . The multilayer coated substrate according to claim 1 , wherein the sealer composition is applied in no more than two coats and demonstrates a dry film thickness of 20 to 50 microns.

7 . The multilayer coated substrate according to claim 1 , wherein the sealer composition is curable at a temperature below 60° C.

8 . The multilayer coated substrate according to claim 1 , wherein the waterborne curable film-forming composition further comprises the water dispersible acrylic polymer c) in the form of an aqueous emulsion of an acrylic polymer, wherein the acrylic polymer is prepared from a reaction mixture comprising butyl acrylate, methyl methacrylate, styrene, hydroxyethyl methacrylate, acrylic acid, and a reaction product of acrylic acid and a glycidyl ester.

9 . The multilayer coated substrate according to claim 8 , wherein at least a portion of the aqueous emulsion of the acrylic polymer is used as a grind vehicle for the pigment.

10 . A multilayer coated substrate comprising:
A) a substrate; B) a primer composition applied directly to a surface of the substrate, forming a first coating; C) a sealer composition applied on top of the first coating; and D) at least one topcoat applied on top of the sealer composition;
wherein the primer composition comprises a waterborne curable film-forming composition, the waterborne curable film-forming composition comprising:
a) a first component comprising an aqueous dispersion of a pigment and
i) polymeric urethane-shell particles having a core-shell morphology and having hydroxyl functional groups, wherein the core of the polymeric urethane-shell particles is prepared from a monomer mixture comprising hydrophobic, ethylenically unsaturated monomers and wherein the shell of the polymeric urethane-shell particles comprises a polyurethane or polyurethane-urea polymer; or
ii) polymeric acrylic-shell particles having a core-shell morphology and having hydroxyl functional groups, wherein the core of the polymeric acrylic-shell particles is prepared from a monomer mixture comprising hydrophobic, ethylenically unsaturated monomers and wherein the shell of the polymeric acrylic-shell particles is prepared from a monomer mixture comprising hydrophilic, ethylenically unsaturated monomers;

b) a second component comprising a polyisocyanate crosslinking agent; and optionally
c) a hydroxyl functional, water dispersible acrylic polymer.

11 . The multilayer coated substrate according to claim 10 , wherein the sealer composition comprises a waterborne curable film-forming composition, the waterborne curable film-forming composition comprising:
a) a first component comprising an aqueous dispersion of a pigment and
i) polymeric urethane-shell particles having a core-shell morphology and having hydroxyl functional groups, wherein the core of the polymeric urethane-shell particles is prepared from a

Assignees

• Ppg Ind Ohio Inc

Inventors

• Lamers Paul H
• Sample Casey Marie

Classifications

• B05D1/02 Primary

  performed by spraying · CPC title

• B05D7/574 Primary

  at least some layers being let to dry at least partially before applying the next layer (B05D7/577 takes precedence) · CPC title

• C09D175/04 Primary

  Polyurethanes · CPC title

• C08G18/348

  Hydroxycarboxylic acids · CPC title

• C08G18/6659

  with compounds of group C08G18/34 · CPC title