SU71300A1 - The method of obtaining thickened colorful pastes, putties, putties - Google Patents

Description

Products obtained by the oxidation of petroleum hydrocarbons, shale, etc. by blowing air in the presence of homogeneous catalysts, as well as artificial drying, derived from them, are distinguished by a large acid number (up to 100), high viscosity and incompatibility with natural drying oils.

These disadvantages hindered the preparation of thick-rubbed paints, putties and putties on the basis of these products, since the paste of pigments was hindered by the high viscosity of the product; the use of a volatile solvent made it impossible to use paint breakers for grinding, since the solvent evaporated during this process. In addition, thickened paints, due to the high acidity of the binder, quickly gelled, stone. Paints and varnishes prepared on the basis of such a binder should not be diluted with drying oils, such as natural, due to the incompatibility of these drying oils.

The proposed method makes it possible to eliminate these disadvantages and

to use for the manufacture of the binder all the oxidation products, i.e., both carboxylic esters and hydroxy carboxylic esters.

The manufacturing process of the proposed method is as follows.

Unoxidized hydrocarbons are distilled from the mixture of oxidation products with live steam. The amount of hydrocarbons to be distilled is determined by stretching with 86% crude alcohol, in which the detergents dissolve.

The oxidized product is separated from low molecular weight readily acidic acids by selectively saponifying them at a temperature of 30-40 ° with a 2% soda solution or potash to reduce the acid number of hydrocarbon oxidation products to 8. Soaps of easily digessed nickelized molecular acids can be used to obtain desiccants .

The oxidized hydrocarbon products thus treated are washed with water at a temperature of 30-40 ° from traces of soda and separated from water, the resulting emulsion is easily destroyed by heating to 80-90 °, and the separated water is separated by decantation.

The knot binder obtained in this way has the viscosity of vegetable oils and does not contain volatiles, with the result that it binds well with pigments; thick-rubbed paints based on such a binder do not thicken and do not gel, and are well diluted with any drying oils, including drying oils based on oxidation products of petroleum hydrocarbons.

Example. 100 kg of the oxidation products of white spirit or ligroin are taken with an acid number of 100 and containing 35% non-oxidized hydrocarbons, the amount of which is determined by means of an alcohol sample. With the aid of direct steam, these hydrocarbons are distilled off and the oxidation products freed from non-oxidized white spirit are subjected to washing at a temperature of 30-40 ° C with a 2% soda solution. By selective saponification, the oxidation products are adjusted to an acid number of 8. The product is washed with warm water until the neutral reaction of the purified water, which is removed by subsequent sedimentation and decantation. The product yield is about 40 kg. This binder is used to paste thick paint, putty, putty.

Product Feature:

a) acid number up to 8;

b) the number of saponification - 180-250;

c) viscosity according to the NII.LKA funnel at 18 ° - 2 sec .;

d) color on iodometric scale - 827;

e) with pigments rubbed off well;

e) it is diluted to a low consistency with any olifes (such as oily and olifes based on hydrocarbon oxidation products) well;

g) bottling and shine-high;

h) the coating, when diluted with oil-free ether salt linseed, dries completely in 24 hours.

Subject invention

A method of producing thick-rubbed colorful pastes, putties, putties, using oxidation products of petroleum hydrocarbons as binders, characterized in that the pigments are mixed with hydrocarbon oxidation products, previously treated first with live steam, in order to remove non-oxidized hydrocarbons and then dilute alkali solutions before reduce the acid number to about 8 in order to remove low-molecular, easily washable acids.