Polysiloxane with UV (Ultraviolet) and moisture double curing groups and preparation method thereof

A polysiloxane, dual-curing technology, used in coatings, adhesives, etc., can solve problems such as the inability to meet the curing of shadow parts, and the inability to achieve photo-curing in small-area shadow parts, achieving excellent photo-curing technology, avoiding inability to cure, low cost effect

Inactive Publication Date: 2014-07-16
TONSAN ADHESIVES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the curing process of the light-curing system is triggered by light, there are certain restrictions on the shape, thickness, and color of the cured object, such as the shadow of a small area cannot be cured by light
The modified polysiloxane synthesized by the above method only contains a single UV curing method, which cannot meet the curing requirements of the shadow part.

Method used

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  • Polysiloxane with UV (Ultraviolet) and moisture double curing groups and preparation method thereof
  • Polysiloxane with UV (Ultraviolet) and moisture double curing groups and preparation method thereof
  • Polysiloxane with UV (Ultraviolet) and moisture double curing groups and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Add 100g of 2000cps hydroxyl silicone oil to a 2L reaction kettle equipped with a stirrer, thermometer and condenser, then heat to 110°C, stir in vacuum for 1h, then lower the temperature to 80°C, add r-aminopropyltriethoxysilane 110 g, add 10 g of sodium hydroxide, react for 2 h, then add 90 g of isocyanoethyl methacrylate, and stir for 2 h at 80° C. to obtain modified polysiloxane (I1).

[0038]

Embodiment 2

[0040] Add 100g of 30000cps hydroxyl silicone oil to a 2L reaction kettle equipped with a stirrer, thermometer and condenser, then heat to 130°C, stir in vacuum for 1h, then lower the temperature to 70°C, add 120g of r-aminopropyltrimethoxysilane , reacted for 3 h, then added 100 g of isocyanoethyl methacrylate, and stirred at 90° C. for 2 h to obtain modified polysiloxane (I2).

[0041]

Embodiment 3

[0043] Add 110g of isocyanoethyl methacrylate and 120g of r-aminopropyltrimethoxysilane to a 2L reaction kettle equipped with a stirrer, thermometer and condenser, then heat to 50°C, stir in vacuum for 1h, then 50 ℃ constant temperature, add 100 parts of 30000cps hydroxyl silicone oil 115g into the reaction kettle, react for 2h, and obtain the modified polysiloxane (I3).

[0044]

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PUM

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Abstract

The invention discloses polysiloxane with UV (Ultraviolet) and moisture double curing groups and a preparation method thereof. The polysiloxane is prepared by the following steps: mixing hydroxyl silicone oil with a silane coupling agent containing amido and carrying out a reaction to generate an intermediate; and then, adding an acrylic monomer containing isocyanate into the reaction intermediate and mixing and reacting to obtain the polysiloxane. The modified polysiloxane synthetic method disclosed by the invention is simple and low in cost, has the characteristics of quick curing and high efficiency, avoids the defect that the dash area or the bottom layer cannot be cured, and has the characteristics of excellent performances and photocuring technology of the organosilicon material. The modified polysiloxane can be applied to the field of binders, film coatings and encapsulating materials.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a polysiloxane with UV and moisture dual curing groups and a preparation method thereof. Background technique [0002] The high and low temperature resistance, weather resistance, electrical insulation, and surface properties of light-curing silicone materials, as well as the advantages of high-efficiency, energy-saving, and environmental protection of light-curing technology, have become research hotspots at home and abroad in recent years. Photocurable polysiloxanes are mainly divided into two types: cationic photocuring of epoxy groups and vinyl ethers, and free radical photocuring systems such as acrylates and mercapto-enes. Cationic photocuring has small shrinkage and is not inhibited by oxygen; however, there are disadvantages such as complex prepolymer synthesis, slow curing, and high cost. The mercapto-vinyl polysiloxane cures quickly, but the merca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/388C08G77/08C08F290/06C09J183/08C09D183/08
Inventor 李海宾史伟同李守平刘信庆
Owner TONSAN ADHESIVES INC
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