Water-borne treatment compositions for porous substrates
AssigneePPG Industries, Inc.
InventorsJohn F. Grunewalder, Mark A. Voelker
Life of this patent
Estimating the term…
Abstract
A treating composition for a porous substrate such as wood is provided in the form of an oil-in-water dispersion comprising a dispersed phase of an organic solvent in relatively low amounts to reduce V.O.C., a water repellent, and a stabilizing surfactant. Optionally, preservatives and resins may be included. Penetration with relatively low organic solvent content is achieved by producing a dispersion having a maximum mean particle size of 3000 .ANG.. Also disclosed is a method of preparing the dispersion with a microfluidizer.
Claims28
An aqueous composition for treating a porous substrate in the form of an oil-in-water dispersion comprising (on a weight basis):
- at least 1 percent but less than 10 percent of a porous substrate penetrating, organic solvent;
- at least 1 percent of a water repellent substance at least 50 percent of which comprises a compound or compounds having 20 to 24 carbon atoms and selected from the group consisting of alpha-olefins and paraffin blends;
- 0. 1 to 5 percent of water soluble surfactant;
- 0.2 to 2 percent of an alcohol having 6 to 20 carbon atoms;
- and
- at least 70 percent water;
- the dispersed phase characterized by mean particle size of no more than 3000 .ANG..
A water reducible concentrate composition for treating a porous substrate in the form of an oil-in-water dispersion comprising (on a weight basis):
- at least 4 percent but less than 40 percent of a porous substrate penetrating, organic solvent;
- at least 4 percent of a water repellent substance at least 50 percent of which comprises a compound or compounds having 20 to 24 carbon atoms and selected from the group consisting of alpha-olefins and paraffin blends;
- 0. 5 to 20 percent of water soluble surfactant;
- 0.5 to 8 percent of an alcohol having 6 to 20 carbon atoms;
- and
- at least 20 percent water;
- the dispersed phase characterized by mean particle size of no more than 3000 .ANG..
A water reducible concentrate composition for treating a porous substrate in the form of an oil-in-water dispersion comprising (on a weight basis):
- at least 4 percent but less than 40 percent of a porous substrate penetrating, organic solvent;
- at least 6 percent of a water repellent substance at least 50 percent of which comprises a compound or compounds having 20 to 24 carbon atoms and selected from the group consisting of alpha-olefins and paraffin blends;
- 0.5 to 20 percent of water soluble surfactant;
- and
- at least 20 percent water;
- the dispersed phase characterized by mean particle size of no more than 3000 .ANG..
Dependencies are inferred from the claim text.