Kit of parts for staining wooden substrates

Patent metadata

Field	Value
Publication number	US-12024641-B2
Application number	US-202017630374-A
Country	US
Kind code	B2
Filing date	Jul 28, 2020
Priority date	Jul 30, 2019
Publication date	Jul 2, 2024
Grant date	Jul 2, 2024

Abstract

A kit of parts is provided, comprising: in one part a) a water-borne stain; and, in another part b) a water-immiscible organic solvent-borne stain, wherein said water-borne stain is essentially free of resin and further contains at least one water-miscible organic solvent. Additionally, a method of coloring a wooden substrate is described, comprising the steps of: a) applying a water-borne stain to a surface of the wooden substrate, wherein the water-borne stain is essentially free of resin and comprises at least one water-miscible organic solvent; and thereafter b) applying a water-immiscible organic solvent-borne stain to said surface.

First claim

The invention claimed is:

1. A kit of parts comprising:
in one part a) a water-borne stain comprising a mixture of water and at least one water-miscible organic solvent; and,
in another part b) a water-immiscible organic solvent-borne stain,
wherein the water-borne stain a) is essentially free of resin.

2. The kit of parts according to claim 1 , wherein the water-borne stain contains one or more dyes and the organic solvent-borne stain contains one or more micronized pigments.

3. The kit of parts according to claim 2 , wherein the mean particle size (D50) of the one or more micronized pigments is less than 1 micron.

4. The kit of parts according to claim 1 , wherein the water-borne stain a) comprises, based on the weight of the water-borne stain a):
from 1 to 10 wt. % of one or more coloring agents; and
at least 80 wt. % of said mixture of water and at least one water-miscible organic solvent.

5. The kit of parts according to claim 1 , wherein the water-borne stain a) comprises coloring agents in an amount of from 1 to 10 wt. %, based on the weight of the water-borne stain a), and wherein the coloring agents consist essentially of one or more dyes.

6. The kit of parts according to claim 1 , wherein the water-immiscible organic solvent-borne stain b) comprises, based on the weight of the water-immiscible organic solvent-borne stain b):
from 1 to 10 wt. % of one or more coloring agents; and
at least 80 wt. % of one or more water-immiscible organic solvents.

7. The kit of parts according to claim 1 , wherein the water-immiscible organic solvent-borne stain b) comprises coloring agents in an amount of from 1 to 10 wt. %, based on the weight of the water-immiscible organic solvent-borne stain b), wherein the coloring agents consist essentially of one or more micronized pigments.

8. The kit of parts according to claim 1 , wherein the water-immiscible organic solvent-borne stain b) is anhydrous.

9. The kit of parts according to claim 1 , wherein the water-immiscible organic solvent-borne stain b) comprises a resin having a weight average molecular weight (Mw) in the range of 40-250 kDa.

10. The kit of parts according to claim 9 , wherein the resin is a polyvinylbutyral.

11. The kit of parts according to claim 1 , wherein the at least one water-miscible organic solvent is selected from the group consisting of C 1 -C 12 alkanols, acetone, diacetone alcohol, glycol ethers and mixtures thereof.

12. The kit of parts according to claim 1 , wherein the amount of water-miscible organic solvent is in the range of 20 to 80 wt. %, based on the weight of the water-borne stain a).

13. A method of coloring a wooden substrate comprising the steps of:
a) applying a water-borne stain to a surface of the wooden substrate, wherein the water-borne stain is essentially free of resin and comprises at least one water-miscible organic solvent; and thereafter
b) applying a water-immiscible organic solvent-borne stain to said surface.

14. The method according to claim 13 , wherein a wash-coat is applied between the step a) of applying the water-borne stain and step b) of applying the water-immiscible organic solvent-borne stain.

15. The method according to claim 13 , wherein no wiping takes place.

Assignees

• Akzo Nobel Coatings Int Bv

Inventors

• Johnson Stephen Edward
• Saunders Heath G
• Neal F Brent

Classifications

• B05D1/38

  with intermediate treatment (intermediate treatment per se B05D3/00) · CPC title

• B27K5/02 Primary

  Staining or dyeing wood {(wood staining compositions C09D15/00)}; Bleaching wood (bleaching wood pulp D21C9/10) · CPC title

• B05D2203/20

  Wood or similar material · CPC title

• B27K3/34

  Organic impregnating agents {(polymers B27K3/15)} · CPC title

• B27K3/005

  employing compositions comprising microparticles · CPC title