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Imidazolyl-containing room-curing silicon resin and preparation method thereof

A room temperature curing, silicone resin technology, applied in the field of silicone resin, can solve the problems of poor adhesion, high curing temperature of silicone resin, poor heat resistance, etc., and achieve the effect of strong adhesion, good adhesion and good heat resistance

Inactive Publication Date: 2015-06-17
CHINA BLUESTAR CHENGRAND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problems of high curing temperature, poor adhesion and poor heat resistance after modification of silicone resin in the prior art, and provides a room temperature curing silicone resin containing imidazole groups. The silicone resin is heat-resistant by introducing imidazole groups Good resistance, good adhesion, and can be cured at room temperature

Method used

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  • Imidazolyl-containing room-curing silicon resin and preparation method thereof
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  • Imidazolyl-containing room-curing silicon resin and preparation method thereof

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Embodiment 1

[0037] A room temperature curing silicone resin containing imidazole group, the room temperature curing silicone resin containing imidazole group has the structure shown in the following formula I:

[0038]

[0039] In formula Ⅰ, R 1 Is H or methyl; R 2 is H or a monovalent alkyl group with 1 to 3 carbon atoms; R 3 for methyl or with R 2 O the same alkoxy; R 4 is methyl or phenyl; R 5 For methyl, phenyl or with R 2 O is the same alkoxy group; n is a positive integer of 1 to 6, and m and p are positive integers of 1 to 100, respectively.

Embodiment 2

[0041] A preparation method of room temperature curing silicone resin containing imidazole group, comprising the following processing steps:

[0042]A. Add imidazole or 2-methylimidazole, chloroalkylalkoxysilane with structural characteristics shown in formula II, acid binding agent and catalyst into the organic solvent, and heat to reflux for reaction; the above is shown in formula II Chloroalkylalkoxysilane with structural characteristics and imidazole or 2-methylimidazole are fed at a molar ratio of 1:0.75 to 1.1;

[0043] Cl-(CH 2 ) n -Si(OR 2 ) 2 R 3 ………………Ⅱ

[0044] In formula II, R 2 A monovalent alkyl group of 1 to 3 carbon atoms; R 3 for methyl or with R 2 O the same alkoxy group; n is a positive integer of 1 to 6;

[0045] B. Remove the inorganic salt obtained by the reaction in step A by filtration, and then use a conventional vacuum distillation process to distill out the remaining chloroalkylalkoxysilane with the structural characteristics shown in formu...

Embodiment 3

[0050] On the basis of embodiment 2, preferred:

[0051] In step A, the acid-binding agent is K 2 CO 3 、Na 2 CO 3 or Cs 2 CO 3 , the molar ratio of the acid-binding agent to the chloroalkylalkoxysilane with the structural characteristics shown in formula II is 1:1.

[0052] In step A, the organic solvent is lower ester, lower ether, aromatic hydrocarbon, alkane, nitrogen-containing solvent or sulfur-containing solvent, and the mass ratio of the organic solvent to other raw materials is 1:10.

[0053] In step A, the catalyst is CuI, CuCl or CuBr, and the molar ratio of the catalyst to the chloroalkylalkoxysilane with the structural characteristics shown in formula II is 0.001:1.

[0054] In step A, the temperature of the heating reflux reaction is 70° C., and the reflux reaction time is 1 hour.

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Abstract

The invention provides an imidazolyl-containing room-curing silicon resin and a preparation method thereof, belonging to the technical field of silicon resins. By introducing the imidazolyl group, the silicon resin has the advantages of favorable heat resistance and excellent adhesion, and can be cured at room temperature. The invention also provides a preparation method of the imidazolyl-containing silicon resin, which enhances the yield and the performance of the final product.

Description

technical field [0001] The invention relates to a silicone resin and a preparation method thereof. More specifically, the invention relates to an imidazole group-containing room temperature curing silicone resin and a preparation method thereof, belonging to the technical field of silicone resins. Background technique [0002] The usual silicone resin is formed by hydrolyzing and condensing hydrocarbyl chlorosilane or hydrocarbyl alkoxysilane through hydrolysis and polycondensation. The hydrocarbon group generally refers to methyl or phenyl, and its curing active group can be hydroxyl or alkoxy The base is solidified by dehydration polycondensation by heating or by hydrolysis after moisture absorption at room temperature and then dealcoholization polycondensation. Silicone resin is a high polymer with Si-O bond as the main chain. Si-O bond has large bond energy and stable structure. Therefore, silicone resin has good temperature resistance, weather resistance and corrosion r...

Claims

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Application Information

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IPC IPC(8): C08G77/26C08G77/08
Inventor 朱良波李霞
Owner CHINA BLUESTAR CHENGRAND CO LTD