SU706375A1 - Binder - Google Patents

Description

(54) CONNECTING

The invention relates to the industry of refractory materials, in particular, to the composition of the binder, which can be used in the manufacture of products of adhesives and coatings. A binder is known, which includes hydrolyzed ethyl methyl silicate with added magnesium chloride. The disadvantage of this binder is that when using its compositions, the refractoriness and temperature of deformation under the load of the products do not practically increase. It is also known that the combined binder based on ethyl silicate and zirconium oxychloride, which is closest to the invention, contains, wt%: 45-90 Ethyl silicate, Water 0.15-0.50. Hydrochloric acid 0.5-4.5 2 Zirconium oxychloride The use of such a binder helps to reduce the rate of use of the material at high temperatures and increases the thermal stability of products. However, the use of this combined binder does not contribute to a significant increase in the temperature of deformation under load while simultaneously increasing the heat resistance of materials. The purpose of the invention is to increase the heat resistance of the products and the temperature of their deformation under load. The goal is achieved by the fact that a binder for refractory products, including ethyl silicate, hydrochloric acid, metal oxychloride and water, as metal oxychloride contains chromium oxychloride in the following ratio of components, wt.%: Sol on acid0,3-1,8 Chromium oxychloride2,0-25,0 WaterExtrous Chromium oxychloride goes to Cr Oktora, covering the particles with a thin layer

Particle material contributes to an increase in heat resistance and deformation temperature by stress, for example, cast corundum and Helium on ethyl silicate bonds.

Prepare several binder compositions. The binder is used to make samples in laboratory labs. Example 1. 10% water, 0.3% hydrochloric acid, and 15% ethyl silicate will be poured into the mixer, hydrolyzed. 48.2% of water, 1.5% hydrochloric acid and 25% chromium oxychloride are mixed. The prepared solution is added to the hydroarisate and stirred for 5-1 ° min. Until the temperature of the mixture is lowered to room temperature.

Example 2. 15% of water is poured into the mixer, 2.7% of chromium oxychloride is added, and O, 3% of hydrochloric acid, and then ethyl silicate is poured. The mixture is stirred in a mixer. Pry time: hydrolysis of at least 15–2 min,

Link, weight,%:. Egilsilicate

Water

Sol Na Acid

Chromium Oxychloride

Mass, weight,%: Filler

Sample Properties

Temperature of onset of deformation under load of 2 kg / s ° C

Heat resistance, thermal cycles (13 ° C - water)

Claims (2)

According to the table, the proposed binder's use increases the temperature of the deformation under load and the heat resistance of the molds. The invention Binder for refractory products, including ethyl silicate, hydrochloric acid, oxychloride metal and water, about 1 ml and the prepared binder to complete hydrolysis is maintained for 4,06 O min. Example Used agitator filled-. 5% of water, O, 2% of hydrochloric acid and 15% of ethyl silicate are hydrolyzed, and then a solution prepared from 65% of water, 0.8% of hydrochloric acid and 14% of chromium oxychloride is poured in parts, mixing thoroughly. Temperature mixtures are maintained within 27-35 ° C. The prepared bond is held for at least 30 minutes. The prepared binder is used in the manufacture of laboratory samples. Bonds can be used to make samples using either the casting method or the semi-dry pressing, tamping, and t, a. The composition of the links and the properties of the samples on the basis of these links are given in the table. 15 70 1 14 82 15 0.3 2.7 80 20 93 7 176O 1780 180O thirty 60 60 This is due to the fact that, in order to increase the heat resistance of products and temperature deformation under load, it contains chromium oxychloride as the metal oxychloride in the following ratio of components, wt.% :( Ethyl silicate15-82 Sol at acid 0.3 to 1.8 57063755 Chromium oxychloride2.0-25.1. USSR author's certificate Water Else # 414231, class From 04 To 35/14, 1975, Information sources, 2. USSR author's certificate taken into account in the examination No. 58713О, cl. From 04 to 35/14, 1977.