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Synthesis method of alkyl phenol aldehyde resin

A technology of alkylphenol formaldehyde resin and synthesis method, which is applied in the field of rubber manufacturing, can solve problems such as high equipment requirements, difficult realization, and environmental pollution, and achieve high monomer conversion rate, excellent viscosity increasing effect, and reduce environmental pollution.

Active Publication Date: 2014-09-10
RACHEM CHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Alkylphenol formaldehyde tackifying resin is a linear oligomer, the number average molecular weight of one strand is between 500-1500, and the weight average molecular weight of one strand will not exceed 2500, because the reaction degree of condensation reaction is low, it will inevitably be in the resin There are more residual phenolic monomers, these free phenols will be brought into rubber products, and during the use of rubber products, they will continue to migrate out of rubber products, thus polluting the environment
A common method for removing free phenols mainly includes: water washing, long-term vacuum, steam distillation, etc., all of which require a lot of man-hours and energy, or require high equipment, are difficult to implement, and have poor economic benefits.

Method used

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  • Synthesis method of alkyl phenol aldehyde resin
  • Synthesis method of alkyl phenol aldehyde resin
  • Synthesis method of alkyl phenol aldehyde resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] On the 1000ml four-neck reaction flask, install stirring, thermometer, reflux condenser and addition funnel. Put in 285g of p-tert-butylphenol, 20.6g of 2,4-di-tert-butylphenol, 1.0g of p-toluenesulfonic acid, 20g of solvent toluene, 110g of 37% formaldehyde solution, heat up to 100°C, and reflux for 2 hours . Atmospheric pressure was raised to 190°C for dehydration and toluene, and 0.7g of sodium hydroxide 20% aqueous solution was added to neutralize. The temperature was raised to 200°C and kept at this temperature for 2 hours. Drain the resin melt into a stainless steel pan and cool to room temperature. The product is orange, with a softening point of 126°C. The molecular weight of the resin is larger during dehydration, and the purpose of adding solvent toluene is to reduce the viscosity of the reaction system during dehydration.

Embodiment 2

[0045] On the 1000ml four-neck reaction flask, install stirring, thermometer, reflux condenser and addition funnel. Put in 255g of p-tert-butylphenol, 61.8g of 2,4-di-tert-butylphenol, 1.2g of p-toluenesulfonic acid, 90g of 37% formaldehyde solution, heat up to 100°C, and reflux for 2 hours. Atmospheric pressure is heated to 140°C for dehydration, and then 16g of aldehyde is added gradually, the temperature is raised to 190°C to remove residual water, and 0.8g of sodium hydroxide 20% aqueous solution is added for neutralization. The temperature was raised to 200°C and kept at this temperature for 2 hours. Drain the resin melt into a stainless steel pan and cool to room temperature. The product is orange, with a softening point of 127°C.

Embodiment 3

[0047] On the 1000ml four-neck reaction flask, install stirring, thermometer, reflux condenser and addition funnel. Put in 180g of p-tert-butylphenol, 164.8g of 2,4-di-tert-butylphenol, 1.2g of p-toluenesulfonic acid, 20g of solvent toluene, 120g of 37% formaldehyde solution, heat up to 100°C, and reflux for 2 hours . Atmospheric temperature is raised to 190°C for dehydration and toluene, and 0.8g of sodium hydroxide 20% aqueous solution is added for neutralization. The temperature was raised to 200°C and kept at this temperature for 2 hours. Drain the resin melt into a stainless steel pan and cool to room temperature. The product is orange, with a softening point of 125°C.

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Abstract

The invention discloses an alkyl phenol aldehyde resin and a synthesis method thereof. The synthesis method comprises the following steps: adding raw materials mono-substituted alkyl phenol and di-substituted alkyl phenol into a reactor, reacting with aldehyde under the action of an acidic catalyst, heating for dehydration, adding aldehyde, and reacting to obtain the alkyl phenol aldehyde resin. Compared with like alkyl phenol aldehyde resins, the alkyl phenol aldehyde resin disclosed by the invention has obviously higher tackifying effect and lower free phenol content. The invention also discloses application of the alkyl phenol aldehyde resin in production manufacturing of tires and rubber products.

Description

field of invention [0001] The invention belongs to the technical field of rubber manufacture, and in particular relates to a synthesis method of an alkylphenol-formaldehyde resin. technical background [0002] Tackifying resin is an important compounding agent in rubber processing. With the increasing use of synthetic rubber, the importance of tackifying resin is increasing due to its insufficient self-adhesiveness. In the tire industry, various types of rubber parts need to be closely bonded to each other before they can be vulcanized in a row, so tackifying resins are essential in tire formulations. [0003] The types of tackifying resins include hydrocarbon resins, rosin resins, alkylphenolic resins and their modified products. Due to the good tackifying effect and little impact on the dynamic properties of rubber mechanical properties, alkylphenolic tackifying resins have become the main industrial rubber tackifying resins. Alkylphenol formaldehyde resins mainly includ...

Claims

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Application Information

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IPC IPC(8): C08G8/12C08L9/00C08L7/00C08L61/08
Inventor 侯远杨张成
Owner RACHEM CHINA CO LTD
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