Aqueous dispersion of glass fibers and method and composition for producing same
AssigneePPG Industries, Inc.
InventorRoy R. Graham
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Abstract
A uniform, stable low foam aqueous dispersion of glass fibers can be accomplished with the present invention. This accomplishment is obtained by the use of a unique combination of an alkyl sulfate quaternary salt of an alkyl amino fatty amine or amide and a water dispersible, liquid mineral oil, inorganic silica defoaming agent. The blend of the dispersing agent and the defoaming agent can be present on the glass fibers to be dispersed in the liquid solution or can be added to the aqueous solution prior to the addition of the glass fibers.
Claims15
Glass fibers having filament diameters larger than around 13 microns that are readily dispersible in aqueous solutions having thereon an aqueous sizing composition, comprising:
- a. about 0.1 to about 50 weight percent of a blend of alkyl sulfate quaternary of an alkyl amino fatty acid amine or amide and a liquid mineral oil-inorganic silica defoaming agent made water dispersible with a compatible surfactant, where the amount of the quaternary material is in the range of about 50 to about 95 weight percent of the blend and the amount of the defoaming agent is around 5 to about 50 weight percent of the blend;
- b. a glass fiber lubricant;
- and
- c. water.
Dependencies are inferred from the claim text.