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Preparation method of transparent rubber reinforcing agent precipitated silica

A technology of precipitated silica and transparent rubber, applied in the direction of silica, silicon oxide, etc., can solve the problems of high impurity content of precipitated silica, affecting the transparency of products, wide particle distribution, etc., achieving less impurities and low price , The effect of stable product quality

Active Publication Date: 2015-09-30
HENGDIAN GRP ZHEJIANG INNUOVO SILICON MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the commonly used preparation method of precipitated silica used as a reinforcing agent for transparent rubber products is to carry out precipitation reaction with alkaline silicate and acid as raw materials, and then undergo aging, filtration, washing, drying and crushing processes. Micron-sized silica is obtained; the existing problem is that the precipitated silica prepared by this process is used as a reinforcing agent for transparent rubber due to high impurity content (especially the influence of inorganic cations) and wide particle distribution. When making products, fogging often occurs, which affects the transparency of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation method operation steps of transparent rubber reinforcing agent precipitated silica of the present invention are as follows:

[0023] first step : Refinement of sodium silicate

[0024] Put 4 tons of solid soluble sodium silicate into the static pressure dissolution kettle, and add 10 m 3 Pure water, steamed, at >8 kgf / cm 2 Dissolve under steam pressure, keep the pressure for 5-6 hours, put it into the storage tank for natural settlement for two days, take 2.8m 3 The supernatant (transparency of 130 mm to 150 mm) was added to 6.0 m 3 Pure water, made into 9% dilute sodium silicate, added 20kg of diatomite, stirred and filtered by blade filter press to remove slag, transparency > 200mm, for ion exchange.

[0025] second step : Preparation of silicic acid

[0026] The filtered sodium silicate with a concentration of 9% is ion-exchanged through a strongly acidic styrene cation exchange column with a strong acid model of 001×7, and the ion exchange is ...

Embodiment 2

[0040] The preparation method operation steps of transparent rubber reinforcing agent precipitated silica of the present invention are as follows:

[0041] first step : Refinement of sodium silicate

[0042] Put 4 tons of solid soluble sodium silicate into the static pressure dissolution kettle, and add 10 m 3 Pure water, steamed, at >8 kgf / cm 2 Dissolve under steam pressure, keep the pressure for 5-6 hours, put it into the storage tank for natural settlement for two days, take 3.1m 3 The supernatant (transparency of 130 mm to 150 mm) was added to 6.0 m 3 Pure water, made into 10% dilute sodium silicate, added 20kg of diatomite, stirred and filtered by blade filter press to remove slag, transparency > 200mm, for ion exchange.

[0043] second step : Preparation of silicic acid

[0044] The filtered sodium silicate with a concentration of 10% is ion-exchanged through a strongly acidic styrene cation exchange column with a strong acid model of 001×7. 3 / h flow rate to pre...

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Abstract

The invention discloses a method for preparing transparent rubber reinforcing agent precipitated silica. The method comprises the following steps: by adopting soluble sodium silicate as a raw material, obtaining dilute silicate after strongly acidic cation exchange; carrying out synthetic reaction under the condition of taking ammonium hydroxide as a precipitator and OP-10 as a surfactant to obtain silica; and obtaining a transparent rubber reinforcing agent precipitated silica product by the subsequent procedures of filter pressing, washing, spray drying, fluid energy milling, grading and packaging. The transparent rubber reinforcing agent precipitated silica prepared by the method is high in purity, and good in particle distribution, and a reinforcing agent with good transparency is provided for the transparent rubber product.

Description

technical field [0001] The invention relates to a method for preparing a fine chemical powder material, in particular to a method for preparing a reinforcing agent precipitated silica for transparent rubber. Background technique [0002] At present, the commonly used preparation method of precipitated silica used as a reinforcing agent for transparent rubber products is to carry out precipitation reaction with alkaline silicate and acid as raw materials, and then undergo aging, filtration, washing, drying and crushing processes. Micron-sized silica is obtained; the existing problem is that the precipitated silica prepared by this process is used as a reinforcing agent for transparent rubber due to high impurity content (especially the influence of inorganic cations) and wide particle distribution. When making products, fogging often occurs, which affects the transparency of the product. Contents of the invention [0003] The purpose of the present invention is to provide ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/18
Inventor 谭玉泉
Owner HENGDIAN GRP ZHEJIANG INNUOVO SILICON MATERIAL