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Low-viscosity alkoxy terminated polysiloxane and preparation method thereof

A technology of viscosity alkoxy-capped and alkoxysilane, which is applied in the field of low-viscosity alkoxy-capped polysiloxane and its preparation, can solve the problems of unstable product performance, catalyst residue, low yield, etc., and achieve Improve mechanical properties, stable performance, and solve the effect of oil leakage

Inactive Publication Date: 2013-11-06
文仁光
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned deficiencies that existing simethicone, MDT type silicone oil, phenyl silicone oil, paraffin mixture, alkyl aromatic compound and other plasticizers and diluents are easy to separate out and leak oil, it is more to overcome the high Cost, complex process, low yield, unstable product performance caused by catalyst residue, etc., the present invention provides a novel low-viscosity alkoxy-terminated polysiloxane and its preparation method

Method used

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  • Low-viscosity alkoxy terminated polysiloxane and preparation method thereof
  • Low-viscosity alkoxy terminated polysiloxane and preparation method thereof
  • Low-viscosity alkoxy terminated polysiloxane and preparation method thereof

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Effect test

Embodiment 1

[0031] Raw material weight ratio:

[0032] α, ω-dihydroxypolydimethylsiloxane: 75 parts, dimethoxydimethylsilane: 25 parts.

[0033] Preparation: In a reaction vessel, add 75 parts of α, ω-dihydroxy polydimethylsiloxane, 25 parts of dimethoxydimethylsilane and 15 parts of catalyst alkali gel, start stirring (50rpm), and heat up to React at 90°C for 2.5 hours, then vacuumize at 160°C to remove low molecular weight for 2.5 hours to obtain low-viscosity alkoxy-terminated polysiloxane.

Embodiment 2

[0035] Proportion by weight of raw materials: α, ω-dihydroxy polydimethylsiloxane: 80 parts, dimethoxydimethylsilane: 20 parts.

[0036] Preparation: In a reaction vessel, add 80 parts of α, ω-dihydroxypolydimethylsiloxane, 20 parts of dimethoxydimethylsilane and 10 parts of catalyst alkali gel, start stirring (100rpm), and heat up to React at 100°C for 22 hours, then vacuumize at 170°C for 2 hours to remove the low molecular weight, and obtain low-viscosity alkoxy-terminated polysiloxane.

Embodiment 3

[0038] Proportion by weight of raw materials: α, ω-dihydroxy polydimethylsiloxane: 70 parts, dimethoxydimethylsilane: 30 parts.

[0039] Preparation: In a reaction vessel, add 70 parts of α, ω-dihydroxypolydimethylsiloxane, 30 parts of dimethoxydimethylsilane and 20 parts of catalyst alkali gel, start stirring (10rpm), and heat up to React at 100°C for 22 hours, then vacuumize at 170°C for 2 hours to remove the low molecular weight, and obtain low-viscosity alkoxy-terminated polysiloxane.

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Abstract

The present invention relates to an organic silicon rubber material, and in particular to a low-viscosity alkoxy terminated polysiloxane and a preparation method thereof. The low-viscosity alkoxy terminated polysiloxane is prepared by polymerization of the following raw materials, in parts by weight: 50 to 100 parts of base rubber and 0.1-50 parts of alkoxy silane. The preparation method has the advantages of low cost, high yield and simple process; and the low-viscosity alkoxy terminated polysiloxane not only reduces the viscosity of products, but also improves the mechanical properties of the products, and solves the defects that physical plasticizers exude oil and are easy to volatilize and migrate.

Description

technical field [0001] The invention relates to organic silicon rubber raw materials, in particular to a low-viscosity alkoxy-terminated polysiloxane and a preparation method thereof. Background technique [0002] Plasticizers, diluents, silicone oils, crosslinking agents, coupling agents, fillers, stabilizers, thixotropic agents, etc., are important raw materials for silicone rubber, and these raw materials reflect their unique characteristics in silicone rubber. Function and characteristics, the characteristics of the formulated silicone rubber are even more diverse. Among them, as one of the important raw materials, plasticizers and diluents can reduce viscosity, increase fluidity and improve mechanical properties after vulcanization. At present, low-viscosity dimethyl silicone oil and MDT type are widely used. Silicone oil, phenyl silicone oil, paraffin mixtures (such as white oil), alkyl aromatic compounds (such as dodecylbenzene, didodecylbenzene), etc. However, these...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/18C08G77/44C08G77/06C08L83/06C08L83/10C08J3/24
Inventor 康旭黄体雁
Owner 文仁光
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