| abstract |
An aqueous glass fiber sizing composition is provided which provides high strength and wet-out to composites prepared using glass fibers 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 useful in making pultrusion profiles having high compressive, shear and flexural strengths. The aqueous composition includes a non-ionic thermosetting urethane-modified epoxy polymer; a water soluble, dispersible or emulsifiable epoxy film-forming polymer different from the urethane-modified epoxy polymer; an emulsifying agent; an organo functional silane coupling agent; and a fiber lubricant. |