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Synthesis method of high-performance phenyl block silicon resin

A synthesis method and technology of silicone resin, applied in the field of chemical production, can solve the problems of easy scratching, poor toughness, low hardness, etc., and achieve the effects of good flexibility and flexibility, excellent performance and excellent anti-sticking properties.

Active Publication Date: 2020-07-28
HUBEI XINGRUI SILICON MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The silicone resin prepared by this method belongs to the network structure, has no block structure, has poor toughness and poor elasticity
[0007] Ordinary silicone resin has a highly cross-linked network structure, high hardness and strength, but poor toughness; while silicone rubber has a helical long-chain structure, good elasticity, but low cross-linking degree, low hardness, and easy to scratch hurt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of synthetic method of high-performance phenyl block silicone resin, comprises the following steps:

[0032] (1) Add 49.1g phenyltrichlorosilane, 2.9g diphenyldichlorosilane, 4g methylphenyldichlorosilane, 3.4 methyltrichlorosilane, 250g solvent, 70g dihydroxypolytrichlorosilane to a 500ml three-necked flask Stir and mix the fluoropropylmethylsiloxane evenly, add the above mixed solution to 180g of water with a constant pressure dropping funnel, and the titration time is about 30min. .

[0033] (2) Stand for stratification, separate the lower layer of acid water, wash the upper layer of hydrolyzate with hot distilled water until neutral, obtain the silicone resin prepolymer, then dry the silicone resin prepolymer, add 2g of aluminum acid after drying Tribenzyl ester was subjected to condensation reaction for 2 hours, and after the reaction was finished, a phenyl silicone resin product was obtained.

[0034] (3) Add catalyst and coupling agent to the prepared si...

Embodiment 2

[0036] A kind of synthetic method of high-performance phenyl block silicone resin, comprises the following steps:

[0037] (1) Add 41g phenyltrichlorosilane, 2.5g diphenyldichlorosilane, 3.8g methylphenyldichlorosilane, 2.98 methyltrichlorosilane, 250g solvent, 80g dihydroxy polytrichlorosilane to a 500ml three-necked flask Fluoropropylmethylsiloxane was stirred for 10 minutes, and the above mixed solution was added to 190g of water with a constant pressure dropping funnel. The titration time was about 30 minutes. Pre-polymerization 2-6h.

[0038] (2) Wash with water until neutral to obtain a silicone resin prepolymer, add sodium sulfate to remove water, add 3g of isopropoxy distearyl acyloxyaluminate for dehydration condensation reaction for 1 hour, and obtain phenyl block silicon resin.

[0039] (3) Add catalyst and coupling agent to the prepared silicone resin, and the properties of the prepared coating rubber are as follows: tensile strength 6.780MPa, elongation at break...

Embodiment 3

[0041] A kind of synthetic method of high-performance phenyl block silicone resin, comprises the following steps:

[0042](1) Add 41g phenyltrichlorosilane, 2.5g diphenyldichlorosilane, 3.8g methylphenyldichlorosilane, 2.98 methyltrichlorosilane, 250g solvent, 80g dihydroxy polytrichlorosilane to a 500ml three-necked flask Fluoropropylmethylsiloxane was stirred for 10 minutes, and the above mixed solution was added to 190g of water with a constant pressure dropping funnel. The titration time was about 30 minutes. Pre-polymerization 2-6h.

[0043] (2) Wash with water until neutral to obtain a silicone resin prepolymer, add sodium sulfate to remove water, add 3 g of triethylpropyl aluminate for dehydration condensation reaction for 1 hour, and obtain a phenyl block silicone resin.

[0044] (3) Add catalyst and coupling agent to the prepared silicone resin, and the properties of the prepared coating rubber are as follows: tensile strength 5.5MPa, elongation at break 450%, hardne...

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Abstract

The invention relates to a synthesis method of high-performance phenyl block silicon resin. The method comprises the following steps: taking phenyl trichlorosilane, diphenyl dichlorosilane, methyl phenyl dichlorosilane, methyl trichlorosilane, a solvent and dihydroxy polytrifluoropropyl methyl siloxane as raw materials, and one or more of aluminum triisopropoxide, aluminum triacetylacetonate, isopropoxy distearoyloxy aluminate, triethyl propyl aluminate and tribenzyl aluminate as catalysts, and carrying out hydrolysis, prepolymerization, washing, dehydration, condensation and desolvation to obtain the phenyl block silicon resin. Fluorine groups are introduced, so that the phenyl silicone resin has lower surface energy and excellent oil resistance, antifouling property and anti-sticking property. The synthetic silicon resin can be cured into a transparent film at room temperature, and the prepared coating adhesive has the tensile strength of 5 Mpa or above and the shore hardness of 80 angstroms. The branched silicon resin and the straight-chain siloxane are combined, so that the silicon resin has better flexibility and flexibility, and the possibility of needing an application material with certain toughness in some high-temperature occasions is provided.

Description

technical field [0001] The invention belongs to the field of chemical production, and in particular relates to a synthesis method of high-performance phenyl block silicone resin. Background technique [0002] Silicone resin has many excellent physical and chemical properties, such as high and low temperature resistance, radiation resistance, oxidation resistance, high air permeability, weather resistance, mold release, water resistance and physiological inertia. Now it has been widely used in many fields such as electronic and electrical chemical industry, metallurgy, construction, aerospace, aviation, medical materials and so on. Silicone resin is a necessary raw material for some high-end silicone products. Although the amount of silicone resin used is not large, it is indispensable. At present, the domestic production of silicone resin is relatively small, and foreign products block our technology. In this international environment, it is necessary to develop silicone res...

Claims

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Application Information

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IPC IPC(8): C08G77/44C08G77/24
CPCC08G77/44C08G77/24C08G77/80
Inventor 李书兵李海娟陈海平刘金明黄永军
Owner HUBEI XINGRUI SILICON MATERIAL CO LTD
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