SU454239A2 - Method for producing bentonites - Google Patents

Description

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The invention relates to methods of producing bentonite pigments used to fill rubbers and plastic masses.

From the main auth. St. La 30o 176 is known for its method of producing bentonites by sequential processing of a clay slurry with a quaternary ammonium salt of an aniline form. -1dehyde resin and soluble dye. However, as a result of this oOrAy, oentonites are ionically and hydrophobic.

In order to obtain bentonites with increased hydrophobicity, it is proposed to prepare the prepared pigment paste with an amine compound, for example, a salt of a quavertic ammonium base of anpline formaldehyde resin, or oxo-compound, for example 2-naphtolol1, butanol.

Example 1. To 4.65 weight. including (0.05 mol) of aniline in 100 weight. including water, 5 wt. including (0.05 mol) of concentrated hydrochloric acid and 6, / o weight. h. u, Uo mol) 4o% formaldehyde. The mixture is heated on a hot water bath for 2 hours. The condensation product of neresa - da.o1 alkali, water is lost and the solution is south in hydrochloric acid.

K solution; aryl 15, / weight. Part (0.125 mol) of dimethyl sulfate and under vigorous stirring and PP-35 With portions of - 73 weight. including (0.15 mol) of a 10% hydro2 solution

sodium oxide. The reaction mixture was incubated at 8 and 9 p RP at 1 hour. The precipitate formed is filtered off, washed with water, 11 and dried. The precipitate is then dissolved in the methanol mixture with

chloroform, adding south 11.3 wt. h. (0, OU

mol) dimethyl sulphate

Pz Slyysn distilled th g of solvents, and the residue

dissolved in 60 wt. h of water.

An iodine solution of the quaternary amurunium base salt of the aniline-formaldehyde resin is introduced into an aqueous suspension of 100 wt. including bentonite clay in 1iO weight. including water and stirred for 15 minutes To the resulting clay was added 30 wt. h dye -

straight scarlet - and kept under stirring for 20 minutes, then 8 Beshes are poured. including solution | 3-yaftol and mix 30 1 MIP. The precipitate is filtered off and dried. Red powder is obtained; it is stabilized to water, acid, очи, fir trees, well swollen, ny in benzene.

Prnmer 2. 1 of an aqueous suspension of clay, anodized with a quarter-ammonium-ammonium salt of Ann ;; informaldsgidnoi smolv, iiOoiy4eaHuii ho example 1, pruiBOp 2, and weight. including krayitel - chrysophenine - and unmixed for 2 minutes. To the mixture is poured 10 wt. part of the outil sirta, stirred for 3 U of mio., the precipitate is filtered and dried.

A yellow color pigment is obtained, resistant to water, alkali, swelling in benzene, toluene.

Example 3. To the suspension of clay obtained in example 1, add 30 weight. h, the dye is a direct turquoise light resistant, dissolved in water, and stirred for 20 minutes. Then to the mixture is poured 8 wt. including the quaternary ammonium salt of the aniliphomaldehyde resin obtained in example 1, is stirred for 30 minutes, the precipitate is filtered off and dried.

The resulting pigment is a blue powder, does not dissolve in water, alkali, and swells well in benzene.

Subject invention

Method for obtaining bentonites but auth. St. 305176, characterized in that, in order to obtain bentonites with increased hydrophobicity, the finished pigment paste is further treated with hydroxy or amino compounds.