Water repellant wood stains with improved weatherability

摘要

Woodstains of improved weatherability are prepared by incorporating polymer coated nanoparticles, and preferably at least one silicone, fluorocarbon, organosilane or wax water repellant into the woodstain.

主权项

1. A method for increasing the weatherability of an aqueous wood stain for application to substrates comprising wood, comprising applying to the wood a wood stain which comprises,
a) polymer-coated nanoparticles which are copolymers of ethylenically unsaturated monomers and ethylenically functionalized nanoparticles, obtained by free radically polymerizing
a)i) solid particles of an inorganic oxide, organopolysiloxane, silicone resin or mixture thereof, functionalized to contain ethylenically unsaturated groups, witha)ii) at least one ethylenically unsaturated monomer selected from the group consisting of vinyl esters, (methylacrylate esters, vinylaromatics, vinyl halides, olefins, and 1,3-dienes, and b) optionally, at least one water repellant selected from the group consisting of organopolysiloxanes, waxes, fluoropolymers, and silanes,wherein when component b) is not present, component a) is present in an amount sufficient to achieve a water repellency efficiency swellometer value of 60 or more.