US 4,391,876 A · Aqueous peroxide emulsion for use with glass fibers

Abstract

An aqueous emulsion of an organic peroxide that is liquid at a temperature of 20.degree. C. and that is insoluble or has limited solubility in water is provided that has improved shelf-stability, shear-stability and process stability and has good dilutability and has a particle size of around 1.5 microns or less. The emulsion has from 1 weight percent of the emulsion to about 70 weight percent of the emulsion of an organic peroxide that is a liquid at 20.degree. C. and in particular that has a half-life exceeding 60 hours at 212.degree. F. (100.degree. C.) and 20 minutes at 300.degree. F. (149.degree. C.) The emulsion also has about 0.005 to about 15 weight percent of the emulsion of a nonionic emulsifier blend. The emulsifier blend has three emulsifiers selected from polyalkylene glycol ethers, dialkylaryl polyether alcohols, and polyoxy-propylene-polyoxyethylene condensates and the like nonionic emulsifiers having a particluar HLB range for each of the three emulsifiers. The remaining weight percent of the emulsion is water. The method of preparing the aqueous emulsion involves the addition of the emulsifier blend to the liquid peroxide. One of the emulsions is split into two portions for the addition. The aqueous organic peroxide-containing emulsion is incorporated into a sizing composition for treating glass fibers to produce treated glass fibers for use as reinforcement in polymers.

Claims15

Dependent claims

An aqueous emulsion of an organic peroxide that is a liquid at about 20.degree. C. and is insoluble or has limited solubility in water, wherein the emulsion has improved stability and dilutability and has an average particle size of around 1.5 microns or less, consisting essentially of:

(a) at least 1 to about 60 percent by weight of said liquid organic peroxide selected from the group consisting of hydroperoxides, .alpha.-oxy and .alpha.-peroxy hydroperoxides, dialkyl peroxides, aldehyde and ketone peroxides, diacyl peroxides, peroxyesters, peroxy acids, peroxydicarbonates, peroxymonocarbonate and perketals,
(b) about 1 to about 15 weight percent of a nonionic emulsifier blend having three emulsifiers selected from the group consisting of polyalkylene glycol ethers, dialkylarylpolyether alcohols, and polyoxypropylene-polyoxyethylene condensates, phenoxypolyethoxyethanols, polyethylene derivatives of fatty acids, partial esters of sorbitol anhydrides;
ethoxylated alcohols, fatty acids, fatty esters and oils, alkylphenols;
glycerol esters, sucrose esters and derivatives, monoglycerides and derivatives, and sorbitan derivatives, polyethoxy phenols, alkyl polyether alcohols, ethylene oxide alkylated phenol condensation products, and mixtures thereof wherein one emulsifier has an HLB in the range of about 6 to about 12 and one emulsifier has an HLB in the range of about 9 to 15 and one emulsifier has an HLB in the range of about 12 to about 20 each in proportions to give an overall HLB level for the emulsifier system in the range of about 9 to about 20, and
(c) the remaining weight percent of the emulsion is water.

2 more elements

Dependencies are inferred from the claim text.

Aqueous peroxide emulsion for use with glass fibers

Life of this patent

Aqueous peroxide emulsion for use with glass fibers

Life of this patent

Abstract

Claims15