METHOD OF DECREASING CHEMICAL DEGRADATION OF FIBER REINFORCED POLYMER, AND FIBER, COMPOSITION AND OIL-IN-WATER TYPE EMULSION

摘要

The present invention provides a method of reducing chemical degradation of fibrous reinforced polymeric materials under thermal aging conditions wherein the chemical degradation is due to chemical interactions between the chemistry present on the fibrous reinforcement and/or reaction and/or thermal decomposition products of said chemistry and the polymer, the method comprising incorporating into the fibrous reinforced polymeric material an antioxidant having low volatility, good thermal stability and good polymer compatibility. The present invention also provided an oil-in-water emulsion of an antioxidant, a method of preparing an oil-in-water emulsion comprising an antioxidant, an aqueous sizing composition comprising an antioxidant-containing oil-in-water emulsion, and a method of forming glass fibers comprising applying to the fibers, during their formation, an aqueous sizing composition comprising an antioxidant-containing oil-in-water emulsion.