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Catalyst composition and preparation method of fluorine silicon contained polymer

A silicon polymer and composition technology, applied in the field of catalyst composition, can solve problems such as low pass rate, fluctuating quality stability of fluorosilicon polymer, and poor uniformity

Active Publication Date: 2008-05-07
SHANGHAI 3F NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It also provides a preparation method of fluorine-containing silicon polymer, which not only has a simple polymerization process, but also can easily control the molecular weight of the synthetic product, has a relatively high average molecular weight and moderate molecular weight distribution, and the prepared fluorine-silicon polymer has a high The transparency of the fluorosilicone polymer can solve the problems of serious fluctuations in quality stability, poor uniformity, and low pass rate of the fluorosilicone polymer.

Method used

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  • Catalyst composition and preparation method of fluorine silicon contained polymer
  • Catalyst composition and preparation method of fluorine silicon contained polymer
  • Catalyst composition and preparation method of fluorine silicon contained polymer

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preparation example Construction

[0026] The invention provides a method for preparing a fluorine-containing silicon polymer. The method of the present invention first selects the polymerization catalyst components. The ring-opening polymerization of organosilicon polymer generally uses anionic catalysts, that is, basic catalysts such as quaternary phosphorous bases, quaternary ammonium bases, alkali metal hydroxides and their Siliconate. The order of the strength of alkalinity is as follows: quaternary phosphorous alkali>quaternary ammonium alkali≥cesium hydroxide (CsOH)>potassium hydroxide (KOH)>sodium hydroxide (NaOH)>lithium hydroxide (LiOH). Generally speaking, the stronger the basicity, the lower the ring-opening polymerization temperature and the shorter the time to reach equilibrium. Literature reported D 3 F The anionic ring-opening polymerization process is as follows:

[0027]

[0028] From A to B is an irreversible process, B to C is a reversible process, when equilibrium is reached. 99% becomes oli...

Embodiment 1

[0075] 10kg D 3 F Monomer (purchased from Zhejiang Sanhuan Chemical Co., Ltd., purity>99.0%), 2g of methyl fluorosilicone oil (purchased from Shanghai Sanai Fluorine New Material Co., Ltd.) as molecular weight regulator and 50g D 4 MeVi Filter through 2# sand core funnel and add it into a pre-dried 20L stainless steel polymerization reactor. Add 40 g of the sodium siliconate catalyst component (polymerization degree about 55) prepared above into the catalyst dehydrator, leave about 500 g of monomer mixture on it, heat it with an infrared lamp, heat the kettle with steam, and control the temperature to 70± 3℃ / 1333.22~2666.44Pa, with dry N 2 Pre-dehydration for 1.5hr, and then the upper part D 3 FPut a small amount in the catalyst dehydrator, soak the alkali for dehydration for 0.5hr, put the catalyst components in the kettle within 15 minutes, wash with the monomers left on the upper part, put all the rinsed monomers into the kettle within 15 minutes, and mix Dehydrate for 0.5hr...

Embodiment 2

[0082] The steps described in Example 1 were repeated, except that the amount of the sodium siliconate catalyst component was 60 grams. The results are shown in Table 1. Six points were taken from different parts of the prepared polymer to compare the molecular weight distribution. The results are shown in Table 2.

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Abstract

The invention discloses a catalyst combination that includes silanolate compound and F contained organo-silicon low molecular polymer that is selected from methyl fluoride silicone oil, hydroxyl silicone oil, and vinyl silicone oil. The weight rate of the silanolate compound and the Fl contained organo-silicon is from 1:1 to 50:1. The invention also discloses the method to make Fl contained silanol by using the catalyst compound.

Description

Technical field [0001] The invention relates to a catalyst composition and a preparation method of a fluorine-containing silicon polymer using the catalyst composition. Background technique [0002] Fluorosilicone polymer is an emerging material developed on the basis of silicone materials and organic fluorine materials. Its main chain is a silicon-containing structure and the side chain is a fluorine-containing structure. This makes the fluorosilicone polymer both excellent in silicone rubber. The high and low temperature characteristics of fluorine rubber and the high temperature resistance, chemical corrosion resistance and oil resistance of fluorine rubber have become essential for modern military industry, aerospace industry, automobile and ship transportation industry, petrochemical industry, and medical and health industries such as artificial organs and medical equipment. Of special materials. The fluorosilicone polymer is usually composed of 3,3,3-trifluoropropylmethyl c...

Claims

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Application Information

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IPC IPC(8): C08G77/08
Inventor 粟小理袁利兵顾永平姚亚中杨兵
Owner SHANGHAI 3F NEW MATERIAL TECH CO LTD
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