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Fluorine-silicon compounded rubber stock and method for making same

A technology for mixing rubber and fluorosilicon, which is applied in the field of fluorosilicone rubber and its preparation, can solve the problems of prolonged production cycle, increased difficulty of process control, complex polymerization process and the like

Active Publication Date: 2007-02-28
SHANGHAI 3F NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Although the above method can obtain a fluorine-containing silicon polymer with good performance, it needs to introduce more components in the polymerization stage or carry out secondary modification to the product after the polymerization, which makes the polymerization process more complicated and increases the preparation steps. The difficulty of process control is increased and the production cycle is extended

Method used

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  • Fluorine-silicon compounded rubber stock and method for making same
  • Fluorine-silicon compounded rubber stock and method for making same
  • Fluorine-silicon compounded rubber stock and method for making same

Examples

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preparation example Construction

[0046]The preparation method for preparing the fluorine-containing silicon polymer of the present invention comprises adding a catalyst composition to the monomer mixture, and the amount of the catalyst composition added accounts for 0.004%-0.010% of the total weight of the monomer mixture. The best is 0.005-0.006%.

[0047] The catalyst composition comprises:

[0048] a) silicon alkoxide compounds having the general formula:

[0049]

[0050] Wherein, n is an integer of 40-60; M is an alkali metal element selected from Na or Li.

[0051] b) fluorine-containing silicone oligomer, which is selected from methyl fluorosilicone oil, hydroxyl fluorosilicone oil, vinyl fluorosilicone oil;

[0052] The weight ratio of the silicon alkoxide compound to the fluorine-containing organosilicon oligomer is 1:1 to 50:1, preferably 20:1-40:1.

[0053] The silicon alkoxide compound used in the catalyst composition can be prepared according to the following reaction equation:

[0054] ...

Embodiment 1

[0097] 10kg D 3 F Monomer (purchased from Zhejiang Sanhuan Chemical Co., Ltd., purity > 99.0%), 2g of methyl fluorosilicone oil as a molecular weight regulator (purchased from Shanghai Sanaifu New Material Co., Ltd.) and 50g D 4 MeVi Filter through a 2# sand core funnel, and add it to a pre-dried 20L stainless steel polymerization reactor. Add 40 grams of the above-prepared sodium silanolate catalyst component (the degree of polymerization is about 55) into the catalyst dehydrator, leave about 500 g of monomer mixture on it, heat it with an infrared lamp, and heat it with steam in the kettle to control the temperature at 70 ± 3℃ / 1333.22~2666.44Pa, dry with N 2 Carry out pre-dehydration for 1.5hr, and then put the upper part D 3 F Put a small amount in the catalyst dehydrator, soak in alkali for dehydration for 0.5hr, put the catalyst component into the kettle within 15min, wash with the monomer left on the upper part, put all the rinsed monomer into the kettle within 15mi...

Embodiment 2

[0104] The steps described in Example 1 were repeated, except that the amount of the sodium silanolate catalyst component was 60 grams. The results are listed in Table 1. Six points were taken at different positions of the obtained polymer to compare the molecular weight distribution, and the results are listed in Table 2.

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Abstract

The invention provides a silicofluoride mixed glue. The invention mainly comprises silicofluoride, white carbon black, scale control agent, heat stabilizer, curing agent and so on. The vulcanised silicofluoride mixed glue possesses properties of high hot strength, good low and high temperature resistance, perfect solvent resistance and oil resistance. The invention also discloses the method for manufacturing silicofluoride mixed glue.

Description

Technical field: [0001] The invention relates to a fluorosilicone compound rubber with excellent mechanical properties, resilience properties, high temperature resistance, low temperature resistance, solvent resistance and fuel oil resistance and a preparation method thereof. technical background [0002] In modern military industry, aerospace industry, transportation industry such as automobile and ship, petrochemical industry, and medical and health industries such as artificial organs and medical equipment, a kind of silicone rubber with excellent high and low temperature characteristics and fluorine rubber with high temperature resistance and chemical corrosion resistance is required. , New material with oil resistance. Fluorine-containing silicon polymer is a new material developed on the basis of organic silicon materials and organic fluorine materials. Its main chain has a silicon-containing structure and side chains have a fluorine-containing structure, which makes f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/24C08L83/08C08K5/541C08J3/24
Inventor 粟小理刘增君袁利兵侯结民杨兵
Owner SHANGHAI 3F NEW MATERIAL TECH CO LTD
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