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M-aminophenol modified aralkylresorcinol-aldehydes compound resin used for rubber formulation and application

A technology of aralkyl resorcinol and m-aminophenol, applied in the field of aralkyl resorcinol-aldehyde compound resin, can solve the problem of slowing down the reaction rate or speed of methylene, reducing the vulcanization rate and the active point Problems such as reducing the number of

Active Publication Date: 2008-08-06
RACHEM CHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the modification reaction, the number of active sites that react with the methylene donor is reduced, resulting in a slower reaction rate or speed of the methylene
Finally, the resorcinol resins in these rubber components reduce the vulcanization rate compared to resorcinol, which is considered a problem in tire production

Method used

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  • M-aminophenol modified aralkylresorcinol-aldehydes compound resin used for rubber formulation and application
  • M-aminophenol modified aralkylresorcinol-aldehydes compound resin used for rubber formulation and application
  • M-aminophenol modified aralkylresorcinol-aldehydes compound resin used for rubber formulation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] To a 500ml round bottom reaction flask equipped with a stirrer, a thermometer, a reflux condenser and a dropping funnel, add 110.1g (1.0mol) of resorcinol and 1.0g of p-toluenesulfonic acid (PTSA), and heat to 120-130°C. Then 52.1 g of styrene (0.5 moles) were added dropwise over a period of about 30-45 minutes. During the dropwise addition of styrene, the temperature of the reaction mixture was maintained between 125°C and 135°C. After the styrene addition was completed, the reaction mixture was reacted at this temperature for another 15 minutes. The PTSA catalyst was neutralized by adding 0.5 g of 50% aqueous NaOH. Thereafter, 10.9 g of m-aminophenol (0.1 mol) was added to the reaction mixture. Then, 48.9 g (0.6 mol) of 36.8% formaldehyde solution was slowly added dropwise to the flask within 45 to 60 minutes, and the temperature was controlled at 95° C. to 120° C. Finally, vacuum dehydration to make the softening point of the resin 101.5°C.

[0046] HPLC analysi...

Embodiment 2

[0048] To a 500ml round bottom reaction flask equipped with a stirrer, a thermometer, a reflux condenser and a dropping funnel, add 110.1g (1.0mol) of resorcinol and 1.0g of p-toluenesulfonic acid (PTSA), and heat to 120-130°C. Then 52.1 g of styrene (0.5 moles) were added dropwise over a period of about 30-45 minutes. During the styrene addition process, the temperature of the reaction mixture was maintained between 125°C and 135°C. After the styrene addition was completed, the reaction mixture was reacted at this temperature for another 15 minutes. The PTSA catalyst was neutralized by adding 0.5 g of 50% aqueous NaOH. Thereafter, 21.8 g of m-aminophenol (0.2 mol) was added to the reaction mixture. Then, 44.8 g (0.55 mol) of 36.8% formaldehyde solution was slowly added dropwise to the flask within 45 to 60 minutes, and the temperature was controlled at 95° C. to 120° C. The reaction mixture was then reacted under reflux for 15 to 30 minutes. Finally, vacuum dehydration t...

Embodiment 3

[0051] To a 500ml round bottom reaction flask equipped with a stirrer, a thermometer, a reflux condenser and a dropping funnel, add 110.1g (1.0mol) of resorcinol and 1.0g of p-toluenesulfonic acid (PTSA), and heat to 120-130°C. Then 52.1 g (0.5 moles) of styrene were added dropwise over a period of about 30-45 minutes. During the styrene addition process, the temperature of the reaction mixture was maintained between 125°C and 135°C. After the styrene addition was completed, the reaction mixture was reacted at this temperature for another 15 minutes. Thereafter, 21.8 g of m-aminophenol (0.2 mol) was added to the reaction mixture. Then, 44.8 g (0.55 mol) of 36.8% formaldehyde solution was slowly added dropwise to the flask within 45 to 60 minutes, and the temperature was controlled at 95° C. to 120° C. The reaction mixture was then reacted under reflux for 15 to 30 minutes. The PTSA catalyst was neutralized by adding 0.5 g of 50% aqueous NaOH. Finally, vacuum dehydration t...

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Abstract

The invention relates to a modified cured rubber compound which comprises (i) the rubber components of natural rubber or synthetic rubber, (ii) methano donator, (iii) aralkyl resorcin-aldehyde resin as the methano acceptor, which is modified by m-aminophenol. The inventive methano acceptor has lower smoke degree than R-80 and higher vulcanizing speed than Penacolite B-20-S. The tension and tearing tests prove that the rubber added with the aralkyl resorcin-aldehyde resin modified by m-aminophenol has better performance than R-80 and B-20-S.

Description

technical field [0001] The present invention relates to m-aminophenol-modified aralkyl resorcinol-aldehyde compound resins, which can be used as rubber formulation resins for the production of tires, pressure hoses and conveyor belts. Background technique [0002] In the production of reinforced rubber products, such as tires and hoses, various reinforcing materials are used to increase the strength of rubber products. Typically, these reinforcements are made from rayon, nylon, polyester, steel wire, and fiberglass. Wire for this purpose is first plated with brass or zinc. To achieve high-efficiency reinforcement, the minimum requirement is that the reinforcement material should be tightly bonded to the rubber. Rubber or rubber mixtures achieve their optimum strength when there is an optimum bond between the rubber and the reinforcement. Because rubber products are continuously flexed and exposed to high temperatures during use, such as car tires, it is difficult to achie...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L9/00C08J3/24C08G8/28C08K5/3492B60C1/00
Inventor 宋修信陈新陈强
Owner RACHEM CHINA CO LTD
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