FIBER GLASS SIZING COMPOSITIONS, SIZED GLASS FIBERS AND METHODS OF USING THE SAME

摘要

An aqueous glass fiber sizing composition is provided which enhances the whiteness and provides high wet-out and wet-through to composites prepared using glass fiber having the sizing composition of the present invention applied thereto. When used to reinforce a thermosetting polymeric material, the glass fibers sized with this composition provide a composite having a more uniform surface with reduced marring by fiber prominence fiber read-through, waviness, warpage or clumping. The composition includes a nonionic emulsion of a urethane modified epoxy thermosetting copolymer; a self reacting crosslinking polymer selected from a vinyl acetate polymer, polyester, acrylic polymer and mixtures thereof; a thermoplastic polymer; at least one organo functional silane coupling agent; filler lubricant; and water in an amount sufficient for applying the sizing composition to at least one glass fiber.