RU2022946C1 - Polymer composition - Google Patents

Abstract

FIELD: manufacture of thermosetting plastic. SUBSTANCE: polymer composition includes the following ingredients, % by weight: oligofurfuryloxysiloxane (FS-2,4) 14.5-17.6; iron trichloride 0.27-0.5; silicon carbide 41.23-43.3; still bottoms from dehardening/developping process of circuit boards using methylene chloride 1.25-8.4; and quartz sand for the balance. EFFECT: increased alkali resistance. 2 tbl

Description

 The invention relates to the production of structural products from mixtures of thermosetting polymers and may find application in enterprises of the chemical industry and energy for the manufacture of containers and other equipment from a monolithic material of a polymer composition.

 A known composition for construction work, including, wt.%: Polyphenylsiloxane 33-38, a copolymer of divinyl with acrylonitrile 3-5, talc 29.5-31.0, marshalite 29.5-31.0.

 The closest in technical essence to the claimed solution is a polymer composition, including, wt.%: Oligofurfuriloxysiloxane 30-39.0, iron chloride FeCl3. 6H2O 0.35-0.50, silicon carbide 18-30, titanium dioxide 0.4-0.6, quartz sand the rest.

 The disadvantage of this solution is the low resistance to neutral and alkaline environments, high water and salt absorption, as well as low ductility of the composition.

SiO

является олигомерным продуктом переэтерификации этилсиликата 40 (ГОСТ 6371-84) фурфуриловым спиртом (ТУ 59.02.004) и имеет следующие показатели:
Внешний вид Прозрачная жидкость темно-коричневого цвета
Содержание кремния, % эл. 9-10
Плотность при 20оС, г/л 1,28-1,29
Вязкость при 20оС по ВЗ-4 24-26
Данные соотношения компонентов и их граничные значения обусловлены тем, что:
совместное количество связующего олигофурфурилоксисилоксана и кубового остатка достаточно для смачивания наполнителя, уменьшение его количества приводит к несмачиваемости, избыток - к текучести массы;
увеличение количества акрилового мономера (кубового остатка) приводит к снижению прочностных характеристик, уменьшение (менее 1,25%) не приводит к эффекту повышения щелочестойкости;
увеличение количества катализатора снижает жизнеспособность полимерной массы, недостаточное его количество (менее 0,27%) к неотверждению полимера.This goal is achieved in that the polymer composition, including oligofurfuriloxyloxane FS-2,4, iron trichloride, silicon carbide, additionally contains waste from the radio industry - bottoms of the process of expansion and development of boards based on methylene chloride in the following ratio of components, wt.%:
Oligofurfuriloxysiloxane FS-2.4 14.5-17.6
Iron trichloride 0.27-0.5
Silicon Carbide 41.23-43.3
Indicated waste 1.25-8.4
Quartz sand
Characteristics of the components used:
The waste of the radio industry - the bottom residue of the process of fanning and development of boards (bottom residue of the photoresist DSRF-2) contains,%:
Methylene Chloride 58.6
Polymethylmethacrylate (LSOM brand) 19.61
Monomer MGS-1 16.4
Benzoquinone 0.98
Michler's Keton 0.39
3-Ethylene Glycol Diacetate 3.96
Antioxidant NG-2246 0.01
Dye DOS. (blue, green) 0.05
Oligofurfuriloxysiloxane-2,4, gross formula of medium composition

SiO

It is an oligomeric product of transesterification of ethyl silicate 40 (GOST 6371-84) with furfuryl alcohol (TU 59.02.004) and has the following characteristics:
Appearance Dark brown clear liquid
The silicon content,% el. 9-10
Density at 20 ° C, g / l 1.28-1.29
Viscosity at 20 ° C according to VZ-4 24-26
These ratios of components and their boundary values are due to the fact that:
the combined amount of a binder oligofurfuryloxysiloxane and a bottoms residue is sufficient to wet the filler, a decrease in its amount leads to non-wettability, an excess leads to mass flow;
an increase in the amount of acrylic monomer (bottom residue) leads to a decrease in strength characteristics, a decrease (less than 1.25%) does not lead to the effect of increasing alkali resistance;
an increase in the amount of catalyst reduces the viability of the polymer mass, its insufficient amount (less than 0.27%) to the non-curing of the polymer.

 The technology for preparing the polymer composition is as follows: bulk materials are measured in appropriate quantities, mixed thoroughly with a FeCl3 curing catalyst with the addition of bottom residue in the form of a moving mass with a density of 1.3 g / cm3. The whole mass is stirred for 7-10 minutes, after which the organic binder oligofurfuryloxysiloxane FS-2.4 is introduced and stirring is continued for 5-7 minutes. Curing occurs under natural conditions during the day, complete curing occurs during heat treatment of the material for 6-8 hours at a temperature of 60-80 ° C.

 In the table. 1 and 2 show the compositions and properties of the proposed material. Water- and salt-saturating surfaces of the material are determined according to GOST 12730.3-78. Alkali resistance is determined according to GOST 25881-83, the methods are based on determining chemical resistance by changing the mass and strength of the samples after exposure to them in the medium.

Table 1
The compositions of the polymer compositions, wt.%
Table 2
Properties of polymer compositions
K + - coefficient of loss of strength of the material after exposure in aggressive environments.

Claims (1)

POLYMER COMPOSITION, including oligofurfuryloxysiloxane APS-2,4, iron trichloride, silicon carbide and quartz sand, characterized in that, in order to increase resistance in neutral and alkaline solutions, reduce water and salt absorption, as well as increase the plasticity of the composition, it additionally contains waste of the radio industry - bottom residue of the process of fanning and development of boards based on methylene chloride in the following ratio of components, wt.%:
Oligofurfuriloxysiloxane FS-2.4 14.5 - 17.6
Iron trichloride 0.27 - 0.5
Silicon Carbide 41.23 - 43.3
Indicated waste 1.25 - 8.4
Quartz sand

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