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Diluent, organosilicone pressure-sensitive adhesive and preparation method of organosilicone pressure-sensitive adhesive

A silicone pressure-sensitive adhesive and diluent technology, applied in the field of silicone rubber, can solve the problems of not reducing the use and emission of volatile organic compounds, not being able to meet the high-viscosity field, unfavorable coating use, etc., to improve long-term preservation And stability, improve heat resistance, reduce the effect of content

Active Publication Date: 2022-05-27
ZHEJIANG XINAN CHEM INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to meet the requirements of environmental protection, environmental protection solvents such as PMA, DBE, EDGA and butyl acetate are used in the prior art to replace traditional solvents to prepare pressure-sensitive adhesives. The disadvantage is that a large amount of solvents are also used, which does not reduce the volatilization that pollutes the air. The use and discharge of non-toxic organic compounds, and the cost is too high, which is not conducive to popularization; although the amount of solvent used is reduced, the viscosity is too high, which is not conducive to coating use, or the peeling force is low, which cannot meet the requirements of high-viscosity fields. need

Method used

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  • Diluent, organosilicone pressure-sensitive adhesive and preparation method of organosilicone pressure-sensitive adhesive
  • Diluent, organosilicone pressure-sensitive adhesive and preparation method of organosilicone pressure-sensitive adhesive

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preparation example Construction

[0065] In another embodiment of the present invention, the preparation method of the diluent includes:

[0066] The linear hydroxyvinyl compound, the silane coupling agent and the first catalyst are mixed, heated and stirred, heated to 40-80°C for 1-3 hours, then heated to 80-100°C and reacted for 1-3 hours; -100°C for 0.5-2.5h and cooling.

[0067] The silicone pressure-sensitive adhesive prepared by the patent is green and environmentally friendly, has no polluting solvent, has a simple preparation process, and is easy to realize industrialization.

Embodiment 1

[0070] Preparation of diluent: 50 parts of 8-nonen-1-ol, 50 parts of methyltrimethoxysilane and 1 part of n-butyl titanate were placed in a 1L four-necked flask equipped with vigorous stirring, thermometer and reflux tube , heated to 40°C for 2h; then heated to 80°C for 1h, then kept at 90°C for 1h in a vacuum environment, stopped heating, and cooled to room temperature.

[0071] Preparation of silicone pressure sensitive adhesive master glue: add 100 parts of MQ silicone resin ((CH) with 70% solid content in a 500 mL open reactor 3 SiO 1 / 2 ) 0.75 (SiO 4 / 2 ), M w 6000), 50 parts of polydimethylsiloxane with a viscosity of 1000 mPa·s and an alkenyl end group, stir evenly, heat up to 120 ° C, reduce the pressure to -0.1 MPa for 3 hours, and remove the solvent to prepare After the mixture is obtained, 5 parts of the above diluent are added, and then 4 parts of a crosslinking agent (linear polymethyl hydrogen siloxane) with a hydrogen content of 0.8% and a viscosity of 30 mPa·...

Embodiment 2

[0074] Preparation of diluent: 50 parts of 6-hepten-1-ol, 35 parts of methyltrimethoxysilane, 15 parts of methacryloyloxypropion were added to a 1L four-necked flask equipped with vigorous stirring, thermometer and reflux tube Triethoxysilane and 0.5 part of isobutyl titanate were heated to 40 °C for 2 h; then heated to 80 °C for 1 h, then kept at 90 °C for 1 h in a vacuum environment, stopped heating, and cooled to room temperature.

[0075] The preparation methods and parameters of the silicone pressure-sensitive adhesive and the main adhesive are the same as in Example 1.

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Abstract

The invention relates to the field of silicone rubber, in particular to a diluent, an organic silicon pressure-sensitive adhesive and a preparation method of the organic silicon pressure-sensitive adhesive. The invention discloses a silanized hydroxyl vinyl diluent which is prepared from the following components in parts by weight: 40-70 parts of a linear hydroxyl vinyl compound, 30-60 parts of a silane coupling agent and 0.5-3 parts of a first catalyst. The silane modification of the diluent can effectively improve the compatibility of the diluent and an organic silicon matrix, and solves the problem of precipitation of the traditional diluent.

Description

technical field [0001] The invention relates to the field of silicone rubber, and more particularly, to a diluent, an organic silicon pressure-sensitive adhesive and a preparation method thereof. Background technique [0002] Silicone pressure-sensitive adhesives are generally composed of elastic and flexible silicone rubber and silicone resin. Compared with rubber-type and acrylate-type pressure-sensitive adhesives, silicone pressure-sensitive adhesives have higher moisture resistance, chemical resistance, high and low temperature resistance, and excellent biocompatibility and dielectric properties. Its operating temperature range is -75 ~ 260 ℃, and the short-term use temperature can even reach 300 ℃. It has broad market application prospects in the fields of electronic appliances, medical care, aerospace and other fields. In addition, it can also bond a variety of difficult-to-stick materials, such as untreated polyolefin, fluoroplastic, polyimide and polycarbonate, etc....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J11/00C09J7/25C09J7/38C09J183/04C09J183/07C09J11/08
CPCC09J11/00C09J7/255C09J7/25C09J7/38C09J183/04C09J11/08C09J2301/122C09J2301/302C09J2467/006C09J2479/086C08L83/04
Inventor 刘凯侯新瑞刘继谢江皮俊轲
Owner ZHEJIANG XINAN CHEM INDAL GROUP
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