Benzothiazole sulfamino low-volatile sulfur-containing silane coupling agent and synthesis method thereof

A technology of benzothiazole sulfur amino and sulfur silane coupling agents, which is applied in chemical instruments and methods, compounds of group 4/14 elements of the periodic table, organic chemistry, etc., to promote vulcanization, increase vulcanization speed, and have obvious environmental benefits Effect

Active Publication Date: 2020-06-23
江西宏柏新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problems of the existing sulfur-containing silane coupling agent emitting organic volatile gas and using organic solvents in the synthesis process, and provides a benzothiazole sulfur-amino low-volatility sulfur-containing silane coupling agent and its synthesis method

Method used

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  • Benzothiazole sulfamino low-volatile sulfur-containing silane coupling agent and synthesis method thereof
  • Benzothiazole sulfamino low-volatile sulfur-containing silane coupling agent and synthesis method thereof
  • Benzothiazole sulfamino low-volatile sulfur-containing silane coupling agent and synthesis method thereof

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specific Embodiment approach 1

[0028] Specific implementation mode 1: The molecular formula of the benzothiazole sulfur-amino low-volatility sulfur-containing silane coupling agent in this embodiment is:

[0029] R 1 NH-C(CH 2 O) 3 Si-R-Sx-Y;

[0030] Wherein, x is an integer from 1 to 10;

[0031] When x=1, Y is H or -R-Si (OR 1 ) 3 C-NHR 2 ;

[0032] When x≥2, Y is -R-Si(OR 1 ) 3 C-NHR 2 ;

[0033] R is CH 2 、CH 2 CH 2 、CH 2 CH 2 CH 2 、CH 2 CH 2 CH 2 CH 2 、CH(CH 3 ), CH 2 CH(CH 3 ), CH(CH 3 )CH 2 , C(CH 3 ) 2 、CH(C 2 h 5 ), CH 2 CH 2 CH(CH 3 ), CH(CH 3 )CH 2 CH 2 、CH 2 CH(CH 3 )CH 2 or CH 2 -(phenyl);

[0034] R 1 for

specific Embodiment approach 2

[0035] Specific embodiment two: the synthetic method of the benzothiazole sulfur amino low-volatility sulfur-containing silane coupling agent described in specific embodiment one is carried out according to the following steps:

[0036] 1. Mix tromethamine and water uniformly in a mass ratio of 1: (4-5) to obtain tromethamine aqueous solution;

[0037] 2. Add 2-mercaptobenzothiazole into tromethamine aqueous solution and mix evenly to obtain a mixed solution; add sodium hypochlorite dropwise to the mixed solution at a temperature of 23-56°C for oxidation reaction, and the reaction is completed After filtering, washing and drying, the semi-finished product is obtained; the molar ratio of 2-mercaptobenzothiazole, amino trihydric alcohol and sodium hypochlorite is 1:1:(1.0~1.2);

[0038] 3. According to the molar ratio of sulfur-containing silane and semi-finished product as 1: (2~2.1), add sulfur-containing silane and semi-finished product to the reaction device connected with a...

specific Embodiment approach 3

[0039] Specific embodiment three: this embodiment differs from specific embodiment two in that the rate of sodium hypochlorite in step two is dripped at 1 to 2 g per minute; the others are the same as specific embodiment two.

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Abstract

The invention relates to a sulfur-containing silane coupling agent and a synthesis method thereof, in particular to a benzothiazole sulfur-amino low-volatile sulfur-containing silane coupling agent and a synthesis method thereof. The problems that an existing sulfur-containing silane coupling agent discharges organic volatile gas and an organic solvent is used in the synthesis process are solved.The molecular formula of the sulfur-containing silane coupling agent is R2NH-C (R1O) 3 Si-R-S x -Y, wherein x is an integer from 1 to 10; when x is equal to 1, Y is H or-R-Si (OR1) 3C-NHR2; when x isgreater than or equal to 2, Y is-R-Si (OR1) 3C-NHR2; R is CH2, CH2CH2 or the like; r1 is CH2, CH2CH2 or the like; r2 is a preparation method which comprises the following steps: preparing a semi-finished product from 2-mercaptobenzothiazole, an amino trihydric alcohol aqueous solution and sodium hypochlorite, and reacting with sulfur-containing silane to obtain the sulfur-containing silane coupling agent. Volatile organic compounds in the rubber are less than 0.1%, and the rubber is suitable for natural rubber and synthetic rubber.

Description

technical field [0001] The invention relates to a sulfur-containing silane coupling agent and a synthesis method thereof. Background technique [0002] In the tire manufacturing industry, sulfur-containing silane coupling agents are often used to promote vulcanization and improve rubber strength. The commonly used sulfur-containing silane coupling agents are Si69 and Si75, and their molecular structures are as follows: [0003] [0004] However, this type of sulfur-containing silane coupling agent releases more small molecules during the vulcanization process, causing pores in the rubber, reducing the strength of the tire, and polluting the environment. With the improvement of people's requirements for environmentally friendly materials, the existing sulfur-containing silanes such as Si69 and Si75 can no longer fully meet the needs of various industries. The Chinese patent whose publication number is CN102344462A discloses a kind of low volatility benzothiazole mercaptos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/548C08K5/549C08L7/00C08L71/02C08K13/04C07F7/18
CPCC07F7/1804C07F7/188C08L7/00C08L71/02C08K13/04C08K5/548C08K5/549
Inventor 纪冠丞张磊李季
Owner 江西宏柏新材料股份有限公司
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