The invention relates in general to emulsifi-'cation and in particular to novel emulsifiers for emulsifying paraffin wax has presented a unique.
and difilcult problem in and of itself. Many of the well-known emulsifiers which ordinarily function well in the emulsification of water-im miscible substances have no emulsifying action on paraflln wax. While paraflln emulsions have been produced heretofore, they have been found to be highly unstable and non-uniform. The use of high speed colloidal mills has not resulted in a solution to the problem.
The general object of the invention is to obviate the foregoing and other disadvantages.
A specific object of the invention is to provide an improved paramn wax emulsion which possesses high stability and uniformity.
A further object of the invention is to provide an improved emulsifier for paraffin wax.
Another object of the invention is to provide an improved paraiiln emulsion which may be produced without the aid of homogenizing or like equipment.
An additional object of the invention is to provide an improved emulsifier which will emulsify saponifying a fatty material with an alkali in the presence of an inert organic solvent. The higher fatty acid and the saponifiable wax are subsequently stirred into the soap-solvent mass in a molten or fluid condition. In the preparation of the parailin wax emulsion of the invention, the foregoing emulsifier is admixed with paraffin is provided wax in a warmed or molten condition whereby the resulting mass is readily disperslble in an aqueous medium by mere stirring.
The invention accordingly comprises a composition of matter possessing the characteristics, properties and the relation of constituents which will be exemplified in the composition hereinafter described and the scope of the invention will be indicated in the claims.
In the preparation of the emulsifier of the invention, any suitable soap may be employed.
The fatty material, which is preferably saponified in the presence of an inert solvent, may be selected from a wide variety of substances includ-- ing, among others, animal, vegetable and marine oils or liquid waxes, the higher fatty acids, esters, etc., as well as blown, hydrogenated or hydroxylated products of such and other fatty materials. As an illustration, the following fatty materials are included in the foregoing class: olive oil, cottonseed oil, palm oil, teaseed oil, rapeseed oil, cocoanut oil, rice bran oil, peanut oil, sesame oil, corn oil, soya bean oil, tallow, menhaden oil, cod oil, sardine oil, sperm oil, porpoise oil, etc., as well as the products obtained by hydrogenating, blowing or hydroxylating these and other oils and their corresponding fatty acids. The type of fatty material used should be selectedable combination of two or more such materials, the fatty material is preferably dissolved or dispersed in a suitable inert solvent vehicle, such for example as diethylene glycol, diethylene glycol monoethyl ether, ethylene glycol monoethyl ether, etc. or mixture of these or other aliphatic alcohols containing from 3 to 6 carbon. atoms, the use of diethylene glycol being preferreii. As is well known, these solvents are either miscible with or soluble in both water and fatty materials v such as fatty oils and soaps prepared therefrom; the term mutual solvent for water and fatty materials is employed in the claims to denote substances having, these properties. Any suitable alkaline agent is added to the fatty material solvent mass to effect saponification. Such agents include, inter alia, potassium hydroxide, sodium hydroxide, sodium carbonate, triethanolamine, etc., the use of potassium h: "oxide being preferred. The amount of alkaline agent added should be substantially the stoichiometrical quantity necessary to completely saponify the fatty material. To insure complete saponification, an excess of alkaline agent may be used so that a small quantity of free alkali remains.