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A solvent-free addition type liquid silicone resin

An addition type, liquid silicon technology, applied in the field of solvent-free addition type liquid silicone resin and its preparation, can solve the problems of long time, high energy consumption, unstable storage, etc., and achieve good electrical insulation properties and good weather resistance. Effect

Inactive Publication Date: 2011-12-14
HUANGSHAN QIANGLU NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a solvent-free addition type liquid silicone resin, which solves the problem of insufficient performance and insufficient storage stability of the existing liquid silicone resin used for surface coating of glass fiber sleeves, silicone tubes, glass fiber cloth and other materials. The problem
[0008] A further object of the present invention is to provide a method for preparing a solvent-free addition type liquid silicone resin, which solves the problems of long time consumption and high energy consumption in the existing liquid silicone resin preparation method

Method used

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  • A solvent-free addition type liquid silicone resin
  • A solvent-free addition type liquid silicone resin

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Embodiment 1, the preparation of vinyl silicone oil for liquid silicone resin

[0025] Use D4 (octamethyltetrasiloxane) or DMC monomer to undergo dehydration polymerization in a reactor, raise the temperature to 180°C, add vinyl double-caps, and then remove low-molecular substances, and the weight ratio of ethylene content in the output is 0.3%. , Vinyl silicone oil with a viscosity of 10000-50000cs.

Embodiment 2

[0026] Embodiment 2, preparation of a solvent-free addition type liquid silicone resin

[0027] In parts by weight, prepare the following raw materials: 100 parts of vinyl silicone oil with an ethylene content of 0.3% by weight and a viscosity of 10000-50000cs; 38 parts of fumed silica (particle size 10-20nm, specific surface area 160-300m 2 / g); treatment agent comprises 5 parts of hexamethylsilazane, 0.5 part of vinyltriethoxysilane, 0.5 part of dimethyldiethoxysilane; and 2 parts of water; 0.06 part of release agent stearic acid ; Inhibitor methyl butynol 0.001 parts, crosslinking agent hydrogen-containing silicone oil 0.6 parts; prepared by addition method. The preparation method comprises the following steps:

[0028]1. Put half of the total weight of vinyl silicone oil (product of Example 1) and silicon dioxide into the kneader, then add hexamethyldisilazane, vinyltriethoxysilane, dimethyldiethoxysilane , water, stearic acid, and kneaded for 2 hours to obtain a rubber ...

Embodiment 3

[0031] Embodiment 3, preparation of a solvent-free addition type liquid silicone resin

[0032] In parts by weight, prepare the following raw materials: 130 parts of vinyl silicone oil with an ethylene content of 0.3% by weight and a viscosity of 10000-50000cs; 58 parts of fumed silicon dioxide (particle size 10-20nm, specific surface area 160-300m 2 / g); treatment agent includes 10 parts of hexamethylsilazane, 2 parts of vinyltriethoxysilane, 2 parts of dimethyldiethoxysilane; and 5 parts of water; 0.09 part of release agent stearic acid ; 0.003 parts of methyl butynol inhibitor, 0.8 parts of hydrogen-containing silicone oil as a crosslinking agent; 2 parts of aluminum hydroxide as a high-temperature resistance additive, prepared by an addition method. The preparation method comprises the following steps:

[0033] 1. Put half of the total weight of vinyl silicone oil and silicon dioxide into the kneader, then add hexamethyldisilazane, vinyltriethoxysilane, dimethyldiethoxysi...

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Abstract

A solvent-free addition type liquid silicone resin, characterized in that, in parts by weight, it comprises the following components: 100-130 parts of vinyl silicone oil with a weight ratio of ethylene content of 0.3% and a viscosity of 10,000-50,000 cs; a particle size of 10 ~20nm, 38-58 parts of fumed silica with a specific surface area of ​​160-300m2 / g; the treating agent includes 5-10 parts of hexamethylsilazane, 0.5-2 parts of vinyltriethoxysilane, dimethyl Diethoxysilane 0.5-2 parts; and water 2-5 parts; release agent stearic acid 0.06-0.09 parts; inhibitor methyl butynol 0.001-0.003 parts, cross-linking agent hydrogen-containing silicone oil 0.6-0.8 parts; prepared by the addition method. The invention solves the problems that the existing liquid silicone resin used for the surface coating of glass fiber sleeve, silicone tube, glass fiber cloth and other materials is not good enough in performance and storage is not stable enough.

Description

technical field [0001] The invention relates to a silicone resin and a preparation method thereof, in particular to a solvent-free addition type liquid silicone resin used for surface coating of glass fiber sleeves, silicone tubes, glass fiber cloth and the like and a preparation method thereof. Background technique [0002] In polysiloxane molecules, the ratio of organic substituents (R) to silicon atoms (Si) is an important parameter that determines the form of the product. When R / Si<2, the product is silicone resin; when R / Si≈2, it is raw rubber in high viscosity plastic state, that is, silicone rubber; when R / Si>2, it is low molecular weight oil, Called silicone oil. Silicone resin is a highly cross-linked network polyorganosiloxane, usually made of methyltrichlorosilane, dimethyldichlorosilane, phenyltrichlorosilane, diphenyldichlorosilane or methylphenyl Various mixtures of dichlorosilanes, in the presence of organic solvents such as toluene, are hydrolyzed at ...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08K13/02C08K3/36C08K5/5445C08K5/5425C08K5/5419C08K5/09C08J3/24B29B7/28
Inventor 李讨饭赵强程琳根王晶李萍
Owner HUANGSHAN QIANGLU NEW MATERIALS
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