Coated substrates prepared with waterborne sealer and primer compositions

Patent metadata

Field	Value
Publication number	US-11554385-B2
Application number	US-201514943133-A
Country	US
Kind code	B2
Filing date	Nov 17, 2015
Priority date	Nov 17, 2015
Publication date	Jan 17, 2023
Grant date	Jan 17, 2023

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 andi) 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; orii) 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 optionallyc) 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 of the primer composition;
C) a sealer composition applied directly to a surface of the first coating of the primer composition; and
D) at least one topcoat comprising a colored coating composition applied on top of the sealer composition;
wherein the sealer composition comprises a waterborne curable film-forming composition having a total solids content of at least 50 percent by weight, 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 by organic solution polymerization 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 having a total solids content of at least 50 percent by weight, 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 by organic solution polymerization 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 (meth)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 of the primer composition;
C) a sealer composition applied directly to a surface of the first coating of the primer composition; and
D) at least one topcoat comprising a colored coating composition applied on top of the sealer composition;
wherein the primer composition comprises a waterborne curable film-forming composition having a total solids content of at least 50 percent by weight, 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 by organic solution polymerization 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

Assignees

• Ppg Ind Ohio Inc

Inventors

• Lamers Paul H
• Sample Casey Marie

Classifications

• 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

• B05D7/14

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

• C08F265/06

  Polymerisation of acrylate or methacrylate esters on to polymers thereof · CPC title

• B05D1/28

  performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers · CPC title

• C25D7/00

  Electroplating characterised by the article coated · CPC title