C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
117/183, 400/590
C09K 15/04 (2006.01) C03C 25/26 (2006.01) C08J 5/08 (2006.01) C08J 5/10 (2006.01) C08K 5/00 (2006.01) C09K 15/08 (2006.01) C09K 15/18 (2006.01)
Patent
CA 1165993
Abstract of the Disclosure Under thermal aging conditions of reinforced polymeric materials, some reinforcements are not as effective as others in providing longevity for the fiber rainforced polymeric materials. A method is provided for incorporating an additional amount of antioxidant into the polymeric mate- rials before the reinforcement is added to the polymeric materials or into an aqueous treating solution for the fibrous reinforcement. The antioxi- dant is of low volatility and good thermal resistance, and when added to the polymer directly is used in an amount greater than three parts per hundred parts of the polymer (PhR). When the antioxidant is added to the aqueous treating solution for treating the fibrous reinforcements, the antioxidant is in the form of an oil-in-water emulsion. Oil-in-water emulsions of antioxidants having low volatility and good thermal resistance are provided for treating fibrous reinforcements such as glass fibers. The emulsions are comprised of the antioxidant in an amount of about 5 to about 60 weight percent of the emulsion along with an organic solvent that has a boiling point above the temperature of use or of preparation and is compatible with the antioxidant in an amount in a ratio of about 0.5 to about 1.5 with the antioxdant and one or more emulsifiers selected from the group consisting of anionic, and nonionic having a combined NLB (hydrophilic/lipophilic balance) in the range of about 12 to about 27. The emulsion can also contain a resin carrier such as an epoxy resin and/or a stabilizing agent such as polyalkylene polyol. An aqueous Treating solution for treating fibrous reinforcement such as a sizing composition for treating glass fibers to increase the pro- tection of fiber reinforced polymeric materials against chemical degradation due to the chemistry on the treated glass fibers or reaction and/or decom- position products of said chemistry is comprised of the oil-in-water emul- sion, film-former, and coupling agent and may contain other conventional agents used in sizing composition.
365047
Borden Ladner Gervais Llp
Ppg Industries Ohio Inc.
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