Patent GB-287943-A (GB)
Title: A process for the coagulation or for the peptisation of products containing unsaturated carbon compounds
IPC: C09F1/00
Filed: 1926-09-30
Abstract: 287,943. Auer, L. Sept. 30, 1926. Fats and fatty acids; mineral and tar oils.- The viscosity and other physical properties of " iscolloid " substances containing unsaturated carbon compounds are modified by addition thereto of a small quantity of an electrolyte comprising an organo-metallic compound, a salt of an organic or inorganic acid, or a solid aromatic or lower aliphatic organic acid, which is either added as such in dry form or may be produced in situ, applying heat to the mixture to dissolve the added salt &c. as completely as possible, and either continuing the heating at atmospheric, increased, or reduced pressure or under varying conditions of pressure, or subjecting the mixture to increased or reduced pressure in the cold. The " isocolloid " may be produced in situ in the reaction mixture, which may be ground in a mill. The term " isocolloid " is defined to mean a colloidal substance whereof the dispersed phase and the dispersion medium of the colloidal system are both of the same chemical composition but in a different physical state, and is said to include fatty acids, resins, high boiling-point mineral oil fractions, goudron, tar, asphalt, rubber and rubber-like products, and styrolene. In addition to the salt &c., small amounts of acids, or organic substances such as phenols, naphthol, naphthalene, chloroform, acetone, alcohols and their homologues and derivatives, of siccatives, or of sulphur or sulphur compounds such as sulphur chloride, may be added, the sulphur &c. being, if desired, added as a separate step in the treatment. During the treatment, the mixture may be subjected to the action of gases other than air, or to the influence of infra-red, ultra-violet, or X-rays. According to examples :-Linseed, rapeseed , or mineral cylinder oil is heated under vacuum at 300-350‹ C. with 5 per cent each of cobalt linoleate and potassium sulphocyanate, the semi-solid tacky product being adapted for the manufacture of lacquers or of linoleum. If the heating takes place at atmospheric pressure, the product is less viscous. Linseed oil is heated under vacuum at 300-350‹ C. wih 2 per cent each of disodium hydrogen phosphate and magnesium peroxide, and 1 per cent of ammonium chloride, a double phosphate of magnesium and ammonium being formed in situ. The viscous product may be used in the manufacture of lacquers, and by boiling it with aniline or diphenyl-guanidine and sulphur a rubber substitute is obtained. If the heating is effected in a closed autoclave at 300-340‹ C. and at a pressure up to 50 atmospheres, a jellylike product results. Sunflower oil is heated under vacuum at 300-350‹ C. with 3 per cent of cresol and phosphorus pentoxide, a cresol phosphate being formed in situ, the product being viscous. Linseed oil is heated under vacuum at 300-350‹ C. with 5 per cent of sodium phenolate. the product being viscous. Chinese wood oil is mixed in a mill with 10 per cent of trichloracetic acid and heated above 140‹ C. An increase of viscosity results and at higher temperatures the product becomes completely solid. American rosin is heated in a partial vacuum with 8 per cent of magnesium sulphate and 4 per cent of formic acid to give a fluid product. Specifications 17667/12, [Class 70, Indiarubber &c.], 4896/13, [Class 95, Paints &c.], 153,942, 214,679, and 249,916 are referred to.