Sizing composition and sized strand useful as reinforcement for reinforced molded composites having improved physical properties
AssigneePPG Industries, Inc.
InventorGary A. Pollman
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Abstract
Sizing compositions having polyurethane latex, cationic silane having unsaturation and polyamino silane are provided. The compositions are used to treat glass fibers to produce sized glass fibers having improved physical properties such as integrity. The sized glass fibers when used with molding compounds yields molded articles with improved physical properties like tensile strength, flexural strength and articles with impact strength.
Claims13
An aqueous sizing composition for use in treating glass fibers, to produce treated glass fibers having good integrity between fibers in strands and/or between strands, and good wet-through and wet-out and where the treated glass fibers are useful in producing reinforced molded composites having improved physical properties and, comprising in weight percent of the aqueous sizing composition:
- (a) about 2 to about 40 of curable polyurethane latex,
- (b) about 0.05 to about 2 of cationic silane having unsaturation,
- (c) about 0.05 to about 2 of polyamino silane, and
- (d) water in the remaining amount.
The sizing composition according to claim 9, wherein the methacrylate functional cationic silane is the mono-addition product of ethylene dimethacrylate and methylaminopropytrimethoxysilane.
Dependencies are inferred from the claim text.