Aqueous peroxide emulsion for use with glass fibers
AssigneePPG Industries, Inc.
InventorChester S. Temple
Life of this patent
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Abstract
An aqueous emulsion containing an organic peroxide solid at 20.degree. C. having improved stability and dilutability. The aqueous emulsion has the solid organic peroxide, which for example can be a bisperoxide or peroxy ester, solubilized in an effective amount of an organic peroxide that is a liquid at 20.degree. C. for example a bisperoxide or peroxyester. The emulsion has one or more cationic, anionic or nonionic lubricants in effective amounts to disperse the peroxides in water. The emulsion also has sufficient amounts of water to make an oil-in-water emulsion.
Claims24
An aqueous emulsion of an organic peroxide solid at 20.degree. C. and having a half-life exceeding 60 hours at 212.degree. F. (100.degree. C.) and 20 minutes at 300.degree. F. (149.degree. C.), wherein the emulsion has an average particle size of around 1.5 microns or less and is dilutable to a water-thin liquid, comprising:
- (a) about 1 to about 70 percent by weight of the emulsion of a mixture of:
- (1) said solid organic peroxide selected from bis-peroxides having the formula:
- ##STR6## wherein R is hydrogen, alkyl hydrocarbon radical or phenyl and R' and R" are hydrogen or alkyl hydrocarbon radicals and R'" is a phenyl, alkyl phenyl or (CH.sub.2 --CH.sub.2).sub.n moiety, where n is 1, 2 or 3 or C.tbd.C containing moiety and peroxyesters having the formula:
- ##STR7## wherein R.sup.IV and R.sup.V are alkyl hydrocarbon radicals or phenyls and
- (2) organic peroxide liquid at 20.degree. C. in an amount to solubilize, at least a major amount of said solid organic peroxide, where the liquid organic peroxides have a half-life exceeding 60 hours at 212.degree. F. (100.degree. C.) and 20 minutes at 300.degree. F. (149.degree. C.) and have the following bis-peroxide formula:
- ##STR8## wherein R is hydrogen, alkyl hydrocarbon radical or phenyl and R' and R" are hydrogen or alkyl hydrocarbon radicals and R'" is a phenyl, alkyl phenyl or (C.tbd.C) or (CH.sub.2 --CH.sub.2).sub.n moiety, where n is 1, 2 or 3 or the following peroxyester formula:
- ##STR9## wherein R.sup.IV and R.sup.V are alkyl hydrocarbon radicals or phenyls, where the liquid bisperoxide is used with the solid bisperoxide and the liquid peroxyester is used with the solid peroxyester, and
- (b) about 0.005 to about 15 weight percent of the emulsion of one or more emulsifiers selected from cationic, anionic and nonionic emulsifiers, and
- (c) the remaining weight percent of the emulsion in water.
Method of preparing an oil-in-water peroxide emulsion, at a temperature below the melting point of the solid peroxide, comprising:
- a. solubilizing an organic peroxide that is a solid at 20.degree. C. selected from the group consisting of bis-peroxides having the formula:
- ##STR10## wherein R is hydrogen, alkyl hydrocarbon radical or phenyl and R' and R" are hydrogen or alkyl hydrocarbons, and R'" is a phenyl, alkyl phenyl or (CH.sub.2 --CH.sub.2).sub.n moiety, where n is 1, 2 or 3 or C.tbd.C containing moiety, and peroxyesters having the formula:
- ##STR11## wherein R.sup.IV and R.sup.V are alkyl hydrocarbon radicals or phenyls in an effective amount of liquid organic peroxide that is a liquid at 20.degree. C., selected from the group consisting of liquid organic peroxides having a half-life exceeding 60 hours at 212.degree. F. (100.degree. C.) and 20 minutes at 300.degree. F. (149.degree. C.) and having the following bis-peroxide formula:
- ##STR12## wherein R is hydrogen, alkyl hydrocarbon radical or phenyl and R' and R" are hydrogen or alkyl hydrocarbon radicals and R'" is a phenyl, alkyl phenyl, or (CH.sub.2 --CH.sub.2).sub.n moiety, where n is 1, 2 or 3 or C.tbd.C containing moiety and peroxyesters having the following formula:
- ##STR13## wherein R.sup.IV and R.sup.V are alkyl radicals or phenyls selected to closely resemble the solid peroxide in chemical type and characteristics and solubility parameters;
- b. adding about 1 to about 15 weight percent of the emulsion of one or more cationic, nonionic or anionic emulsifiers having an HLB greater than 8;
- and
- c. adding water in an amount of at least about 5 weight percent of the emulsion to emulsify the peroxides into an oil-in-water emulsion.
Dependencies are inferred from the claim text.