Preparation method of functionalized terminal group polysiloxane

A technology for hydroxyl-terminated polysiloxane and polysiloxane, which is applied in the field of polysiloxane synthesis, can solve the problems of high energy consumption, unstable product quality, difficult control of the reaction process, etc., and achieves low energy consumption and good performance. Prospects for industrial applications, production of more controllable effects

Inactive Publication Date: 2012-08-29
石振东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reaction process of these methods is not easy to control, the product quality is unstable, and the energy consumption is large at the same time.
In addition, the large-scale synthesis of various types of functionalized polysiloxanes has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] An aminopolysiloxane, its raw materials and dosage are: 3 mol of D4, 0.1 mol of sodium hydroxide, 0.3 mol of deionized water, 0.3 mol of ethylenediamine, and 1 mol of γ-aminopropyltriethoxysilane.

[0040] Its preparation method includes the following steps: add D4 and sodium hydroxide to the reactor, stir at 60°C for 1 hour, then add deionized water and ethylenediamine, keep stirring at 60°C for 1 hour to obtain hydroxyl polysilicon Then add γ-aminopropyltriethoxysilane, keep warm at 60℃ and continue to stir for 4 hours to obtain a viscous clear transparent liquid. The liquid is neutralized by acid solution, filtered and vacuumized to obtain aminopolysiloxane alkyl.

Embodiment 2

[0042] An amino polysiloxane, its raw materials and dosage are: D4 3 mol, sodium hydroxide 0.25 mol, deionized water 0.05 mol, 3,3'-diaminodipropylamine 0.4 mol, γ-aminopropyl trimethyl Oxysilane 0.1 mol.

[0043]Its preparation method includes the following steps: add D4 and sodium hydroxide to the reactor, stir at 80°C for 0.5 h, then add deionized water and 3,3'-diaminodipropylamine, keep stirring at 80°C React for 1 hour to obtain hydroxy polysiloxane, then add γ-aminopropyltrimethoxysilane, keep warm at 80°C and continue to stir for 5 hours to obtain a viscous clear and transparent liquid, which is neutralized by acid solution, filtered, pumped vacuum to obtain aminopolysiloxane.

Embodiment 3

[0045] An aminopolysiloxane, its raw materials and dosage are: 3 mol of D3, 0.1 mol of sodium hydroxide, 0.006 mol of deionized water, 0.2 mol of ethylenediamine, and 0.012 mol of γ-aminopropyltriethoxysilane.

[0046] Its preparation method includes the following steps: add D3 and sodium hydroxide to the reactor, stir at 40°C for 2 hours, then add deionized water and ethylenediamine, keep stirring at 40°C for 5 minutes to obtain hydroxyl polysilicon Then add γ-aminopropyltriethoxysilane, keep warm at 40°C and continue to stir for 3 hours to obtain a viscous clear and transparent liquid. The liquid is neutralized with acid solution, filtered, and vacuumized to obtain aminopolysiloxane alkyl.

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PUM

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Abstract

The invention discloses a preparation method of functionalized terminal group polysiloxane. A preparation method of terminal hydroxyl polysiloxane comprises the following steps of: stirring methylcyclosiloxane, an alkali, water and an amine for reacting; and neutralizing a product with an acid, filtering or washing with water to neutral, and vacuumizing. A preparation method of functionalized terminal group polysiloxane of functionalized terminal group non-hydroxyl comprises the following steps of: stirring methylcyclosiloxane, an alkali, water and an amine for reacting; adding a silane coupling agent and stirring for reacting; and neutralizing an obtained product with an acid, filtering, and vacuumizing. Raw materials used in the method are conventional substances, the reaction conditions are mild, high temperature and inert gas protection are not required, the reaction safety is high, and meanwhile, the cost is saved greatly. The preparation method disclosed by the invention has the advantages of simple reaction device, simple and practical reaction process, convenience for realizing, high efficiency, short preparation time, low energy consumption and low cost.

Description

technical field [0001] The invention relates to the synthesis of polysiloxane, in particular to a preparation method of functionalized terminal polysiloxane. Background technique [0002] Polyorganosiloxane molecules have the following characteristics: (1) Good electrical insulation, flame retardancy, and weather resistance; (2) Ideal physiological and chemical inertness, non-toxic, and non-polluting ecological environment; (3) Glass transition temperature Low temperature, high resistance, good low temperature performance, low high temperature rheology; (4) easy spreading film forming, defoaming, hydrophobicity and lubricity caused by low surface tension. It can form block copolymers with other polymer materials, such as the use of polyorganosiloxane emulsion for padding of fabrics, which can not only effectively isolate fibers, avoid direct contact between fibers and fibers, but also improve the friction coefficient of the fiber surface Reduced, so that the fibers are easy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/16C08G77/26C08G77/20C08G77/28C08G77/08
Inventor 石振东
Owner 石振东
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