Resorcin phenolic resin modified rubber composition

A technology of resorcinol and composition is applied in the application field of rubber compound resin in the preparation of pneumatic tires, pressure pipes and belts, and can solve the problem of high content of free resorcinol

Active Publication Date: 2008-08-06
SINO LEGEND CHINA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Despite these improvements, the content of free r...

Method used

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  • Resorcin phenolic resin modified rubber composition
  • Resorcin phenolic resin modified rubber composition
  • Resorcin phenolic resin modified rubber composition

Examples

Experimental program
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Effect test

Embodiment 1

[0040] In a 500ml round-bottomed reaction flask equipped with a stirrer, thermometer, reflux condenser and dropping funnel, add 165.1g (1.5 moles) of resorcinol and 10.71g of triphenyl phosphite catalyst (TPP), and heat Blend until melted. Then, 78.1 g (0.93 mol) of formaldehyde aqueous solution was slowly added dropwise to the molten resorcinol within about 90-120 minutes. After the dropwise addition of formaldehyde is completed, the reactant is dehydrated and evaporated to remove all volatiles in the flask until the temperature rises to about 150°C to 160°C. Then, 72.6 g (0.705 moles) of styrene was added to the molten resorcinol-formaldehyde reaction liquid under the condition of increasing temperature, and the dropping time was controlled for about 60 to 120 minutes. After the styrene addition was completed, 5.6 g of NaOH aqueous solution was added to neutralize the acid catalyst. Finally, vacuum dehydration was carried out to obtain a tan resin with a softening point of...

Embodiment 2

[0042] In a 500ml round-bottomed reaction flask equipped with a stirrer, thermometer, reflux condenser and dropping funnel, add 165.1g (1.5 moles) of resorcinol and 10.71g of triphenyl phosphite catalyst (TPP), and heat Blend until melted. Then, 71.25 g (0.675 mol) of styrene was added dropwise to the molten resorcinol, and the dropping time was controlled to be 120 minutes. Then slowly add 77.5 g (0.93 moles) of formaldehyde aqueous solution to the molten resorcinol-styrene reaction solution within about 90-120 minutes. After the dropwise addition of formaldehyde is completed, the reactant is dehydrated and evaporated to remove all volatiles in the flask until the temperature rises to about 150°C to 160°C. Then, add 16.5 g (1.15 moles) of styrene to the resorcinol-styrene-formaldehyde reaction liquid in about 60 to 120 minutes under the condition of gradually increasing the temperature. After the dropwise addition, 5.5 g of NaOH aqueous solution was added to neutralize the ...

Embodiment 3

[0044] In a 500ml round bottom reaction flask equipped with stirrer, thermometer, reflux condenser and dropping funnel, add 165.1g (1.5mol) resorcinol and 10.71g triphenylphosphite catalyst (TPP), and heat Blend until melted. Then, 109.41 g (1.05 mol) of styrene was added dropwise to the molten resorcinol, and the dropping time was controlled to be 120 minutes. Then slowly add 78.75 g (0.945 moles) of formaldehyde solution to the molten resorcinol-styrene reaction liquid within about 90-120 minutes. After all the formaldehyde addition was complete, 5.5 g of aqueous NaOH was added to neutralize the acid catalyst. Finally, vacuum dehydration to obtain a red resin with a softening point of 105°C. HPLC analysis showed that the content of free resorcinol in the resin was 0.96%.

[0045] The resulting resin contained less than 1% free resorcinol and is considered to be a very low volatility resorcinol resin useful in many applications.

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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 substituted phenol resin as the methano acceptor, wherein the aralkyl substituted phenol (resorcin) methano donator resin can be prepared by reacting the substituted or non-substituted phenol compound, vinyl aromatic compound and aldehyde and/or ketone in the presence of organic metal phosphate or phosphite ester catalyst. The inventive methano acceptor has lower smoke degree than R-80 (resorcin-80). And in the tension strength and dynamic mechanical property test, the aralkyl substituted resorcin phenol resin has better performance than R-80 and resorcin-formaldehyde (RF) resin.

Description

technical field [0001] The present invention relates to the preparation of aralkyl-substituted phenolic resins and their use as rubber formulation resins in the manufacture of pneumatic tires, pressure pipes and belts. Background technique [0002] In the production of reinforced rubber products such as tires and hoses, various reinforcing materials have been used to increase the strength of the rubber products. Typically, these reinforcements are made from rayon, nylon, polyester, steel wire, and fiberglass. Steel wire for these purposes is first plated with brass or zinc. The basic requirement for effective reinforcement is that these reinforcements bond tightly to the rubber. Rubber or rubber compounds achieve maximum reinforcement when maximum bonding occurs between the rubber and the strong material. Because rubber products are constantly flexed and exposed to high temperatures during use, such as in car tires, it is difficult to achieve good adhesion. The rubber an...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L9/00C08L11/00C08L23/22C08L23/16C08L61/34C08K5/17C08K5/3467C08K5/32C08K5/159B60C1/00
Inventor 杨全海陈新罗朝霞陈强
Owner SINO LEGEND CHINA CHEM
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