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Methyl polysilazane resin and preparation method thereof

A technology of methylpolysilazane and methyldichlorosilane, which is applied in the field of methylpolysilazane resin and its preparation, can solve the problems of environmental pollution, cumbersome operation process and high cost, and achieve simple and convenient operation, strong Adhesion, little pollution effect

Pending Publication Date: 2021-02-05
库贝化学(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no good preparation method for preparing methyl polysilazane resin in the prior art at home and abroad. The preparation methods in the prior art generally have cumbersome operation process, high cost, and relatively large pollution to the environment.

Method used

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  • Methyl polysilazane resin and preparation method thereof
  • Methyl polysilazane resin and preparation method thereof
  • Methyl polysilazane resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] ①Add 45g methyldichlorosilane, 45g trichlorosilane and 500g solvent together into a refrigerable tubular reactor or a stirrable reactor, mix the raw materials evenly and refrigerate, and control the polymerization temperature at -30℃~40℃ It is advisable; ②Slowly feed 0.3L / h*4h of ammonia gas into the reactor; ③Stop feeding ammonia gas; ④Filter impurities NH 4 Cl; ⑤ rotary steaming; ⑥ centrifugation.

Embodiment 2

[0020] ①Put 50g of methyldichlorosilane, 50g of trichlorosilane and 500g of solvent together into a refrigerable tubular reactor or a stirrable reactor, mix the raw materials evenly and refrigerate, and control the polymerization temperature at -30℃~40℃ It is advisable; ②Slowly feed 0.3L / h*4h of ammonia gas into the reactor; ③Stop feeding ammonia gas; ④Filter impurities NH 4 Cl; ⑤ rotary steaming; ⑥ centrifugation.

Embodiment 3

[0022] ①Put 50g of methyldichlorosilane, 45g of trichlorosilane and 500g of solvent together into a refrigerable tubular reactor or a stirrable reactor, mix the raw materials evenly and refrigerate, and control the polymerization temperature at -30°C to 40°C It is advisable; ②Slowly feed 0.3L / h*4h of ammonia gas into the reactor; ③Stop feeding ammonia gas; ④Filter impurities NH 4 Cl; ⑤ rotary steaming; ⑥ centrifugation.

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PUM

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Abstract

The invention discloses methyl polysilazane resin and a preparation method thereof, the methyl polysilazane resin controls the raw material input amount of methyldichlorosilane and trichlorosilane inammonolysis raw materials, and six-membered and eight-membered ring-shaped and linear methyl polysilazane mixtures with Si-N and methyl double chains on side chains are synthesized; the addition amount of the raw materials of the methyl polysilazane resin is as follows: the mass ratio of methyl dichlorosilane to trichlorosilane is 1: (0.8-1.2); the mass ratio of the proton inert solvent to the nitrogen silane is 7-12: 1; the molar ratio of the introduction amount of the ammonia gas to the chlorosilane is (5-12): 1, and the total amount of the chlorosilane is the sum of methyl dichlorosilane and trichlorosilane. The invention relates to a brand-new preparation method of methyl polysilazane resin, the methyl polysilazane resin has strong adhesive force, high temperature resistance, corrosionresistance, weather resistance, hydrophobicity, antifouling property and other comprehensive properties, and compared with the preparation method of foreign similar products, the preparation method is simpler and more convenient to operate and less in environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a methyl polysilazane resin and a preparation method thereof. Background technique [0002] Methylpolysilazane resin is a kind of polymer with Si-N bond as the main chain and side chain as organic group. In the polymer, silicon atoms and nitrogen atoms are arranged alternately to form a basic skeleton, and both ring and linear polymers are represented by the molecular formula [R 1 R 2 Si-NR 3 ] n Indicates that R 1 -R 3 Can be a hydrogen atom or an organic substituent. Methylpolysilazane resin is characteristic 1, which is different from the characteristic 2 of similar foreign products and the characteristic 3 of domestic products. Characterization 1: High viscosity resin, colorless transparent or light yellow liquid, can be used in coatings, adhesives, composite materials and ceramic precursors. Characterization 2: Low-viscosity resin, colorless tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/62
CPCC08G77/62
Inventor 刘章友常明月
Owner 库贝化学(上海)有限公司
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