反应详情

In an alternative embodiment, the antioxidant tetrakis(methylene-3-3',5'-di-t-butyl-4'-hydroxy phenyl)propionate methane available from Ciba Geigy Corporation under the trade designation "IRGANOX 1010" antioxidant is dissolved in an amount of about 5 to about 20 weight percent of the emulsion in the organic solvent methyl ethyl ketone. The amount of methyl ethyl ketone used is in the range of around a 1 to 1 ratio with the antioxidant. The emulsifer blend is combined with this mixture by any of the aforementioned manners of addition. The emulsifier blend comprises the emulsifier polyoxyethylene (4) sorbitan monolaurate (Tween 21 available from ICI Americas, Inc.) wherein the amount of the monolaurate emulsifier is in the range of about 1 to about 5 weight percent. Another emulsifier that is used is a condensate of ethylene oxide with hydrophilic bases formed by condensing propylene oxide and propylene glycol which is available from BASF Wyandotte under the trade designation "Pluronic F-85" having an HLB of 24 and used in an amount of about 1 to about 5 weight percent. Another emulsifier that is used is the polyethoxylated vegetable oil available from GAF Corporation under the trade designation "EMULPHOR EL-719" having an HLB of 13.6 and used in an amount of about 1 to about 5 weight percent. In addition to the antioxidant, the methyl ethyl ketone, and the emulsifiers, an amount of polyalkylene polyol lubricant available under the trade designation "Pluracol V-10" available from BASF Wyandotte Corporation is added to the emulsion in an amount of about 1 to about 5 weight percent. This lubricant is added to give the emulsion additional stability. This lubricant can also be added to the sizing composition rather than to the emulsion. The polyalkylene glycol "Pluracol V-10" is a viscous, high molecular weight, liquid with a specific gravity at 25/25° C. by BWC Test of 1.089 with a flash point by ASTM D92-52 of 510° F. To the mixture of the antioxidant, methyl ethyl ketone, monolaurate, oxide glycol condensate and vegetable oil emulsifiers and polyol lubricant there is added the requisite water to produce an oil-in-water emulsion as for the preferred antioxidant discussed above.

1. additionof the aforementioned manners of addition