Polysaccharide-based water-compatible wood stain

Patent metadata

Field	Value
Publication number	US-10519334-B2
Application number	US-201715722715-A
Country	US
Kind code	B2
Filing date	Oct 2, 2017
Priority date	Sep 30, 2016
Publication date	Dec 31, 2019
Grant date	Dec 31, 2019

Abstract

Water-based stains comprise or consist essentially of a polysaccharide resin and a crosslinking agent such as an isocyanate. Upon evaporation of water, the polysaccharide undergoes crosslinking with the isocyanate component, developing water resistance so that it will not redissolve upon application of a water-based or oil-based clearcoat; as a result, lifting is minimized after a drying time of, e.g., two to six hours.

First claim

What is claimed is:

1. A wood stain composition comprising:
an aqueous solution of a crosslinkable polysaccharide having a structure wherein at least one hydroxyl group is bonded to at least one carboxyl group of an alkyd;
a crosslinking agent crosslinkable with the polysaccharide upon drying of the aqueous solution; and
a pigment dispersion.

2. The composition of claim 1 , wherein the crosslinking agent consists essentially of a monomeric aliphatic diisocyanate, a toluene diisocyanate, a hexamethylene diisocyanate, a naphthalene diisocyanate, a methylene bis-cyclohexylisocyanate, or an isophorone diisocyanate.

3. The composition of claim 1 , further comprising a thickener.

4. The composition of claim 3 , wherein the thickener consists essentially of hydroxyethylcellulose, hydrophobically-modified ethylene oxide-based urethanes, or hydrophobically-modified alkali soluble emulsions.

5. The composition of claim 1 , further comprising a defoamer.

6. The composition of claim 1 , further comprising an amine.

7. The composition of claim 6 , wherein the amine consists essentially of dimethylethanolamine, monoethylethanolamine, trimethylethanolamine, morpholine, or ammonia.

8. The composition of claim 1 , further comprising a surfactant.

9. The composition of claim 8 , wherein the surfactant is a nonionic surfactant.

10. The composition of claim 9 , wherein the surfactant is an octylphenol ethoxylate surfactant.

11. The composition of claim 8 , wherein the surfactant has a hydrophile-lipophile balance value between 5 and 15.

Assignees

• Halstead Joshua
• Sherwin Williams Co

Inventors

• Halstead Joshua

Classifications

• C08G18/283

  Compounds containing ether groups, e.g. oxyalkylated monohydroxy compounds · CPC title

• C08G18/755

  and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate · CPC title

• C08G18/7678

  containing condensed aromatic rings · CPC title

• C09D175/04

  Polyurethanes · CPC title

• C09D105/00 Primary

  Coating compositions based on polysaccharides or on their derivatives, not provided for in groups C09D101/00 or C09D103/00 · CPC title