Phenolic resin, its composition, preparation method and application

A technology of phenolic resin and phenol, which is applied in the field of rubber composition containing the phenolic resin, phenolic resin and its preparation, and can solve problems such as complicated operation and environmental pollution

Inactive Publication Date: 2014-08-20
SINO LEGEND CHINA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the free phenol content in the resin has been reduced, water washing has produced waste water, and the water in the used 37% formaldehyde solution will also become waste water, thereby causing environmental pollution
In addition, water washing and steam distillation will also cause complex operations.

Method used

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  • Phenolic resin, its composition, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 188 g of phenol and 0.8 g of p-toluenesulfonic acid monohydrate into a 500 ml four-neck round bottom flask equipped with mechanical stirring, thermometer, reflux condenser and dropping funnel, heat to 100 °C under stirring, within 1 hour 97.4 g of 37% formaldehyde aqueous solution was added dropwise, and then refluxed for 1 hour. Then heated and distilled at atmospheric pressure to 160°C, slowly started vacuum distillation under reduced pressure, and distilled under reduced pressure at 2000 Pa vacuum degree and temperature 172°C for 1 hour to obtain the target product phenolic resin, namely reinforcing resin 1. After identification, the phenolic resin The softening point is 109°C, and the free phenol content is 0.15%. Produce 120 milliliters of waste water containing phenol. In this embodiment, atmospheric distillation can be carried out at 160-200°C. Vacuum vacuum distillation can be carried out at a vacuum degree of 5000-2000 Pa and a temperature of 168-172°C. ...

Embodiment 2

[0026] Add 188 g of phenol and 1.88 g of oxalic acid dihydrate to a 500 ml four-necked round-bottomed flask equipped with mechanical stirring, a thermometer, a reflux condenser and a dropping funnel, heat to 100°C under stirring, and drop in 20 minutes Complete 113.6 grams of 37% aqueous formaldehyde solution, then reflux for 1 hour. Then heated and distilled at atmospheric pressure to 160°C, slowly started vacuum distillation under reduced pressure, 1000 Pa vacuum and 195°C for 15 minutes to obtain reinforced resin 2 with a softening point of 99°C and a free phenol content of 0.34%. Produce 109 milliliters of waste water containing phenol. In this embodiment, atmospheric distillation can be carried out at 190-195°C. Vacuum vacuum distillation can be carried out at a vacuum degree of 5000-1000 Pa and a temperature of 190-195°C.

Embodiment 3

[0028] Add 188 grams of phenol and 1.88 grams of oxalic acid dihydrate to a 500-milliliter four-necked round-bottomed flask equipped with a mechanical stirrer, a thermometer, a reflux condenser and a dropping funnel, heat to 100°C under stirring, and add dropwise 65.3 grams of 37% Aqueous formaldehyde solution, then gradually added 18.7 g of paraformaldehyde, and then refluxed for 1 hour. Then heated and distilled at atmospheric pressure to 160°C, slowly started vacuum distillation under reduced pressure of 700 Pa and 178°C for 30 minutes to obtain reinforced resin 3 with a softening point of 101.4°C and a free phenol content of 0.52%. Produce 90 milliliters of waste water containing phenol. In this embodiment, the vacuum vacuum distillation can be carried out at a vacuum degree of 700 Pa and a temperature of 178-182°C.

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Abstract

The invention relates to a phenolic resin, which has a free phenol content of less than 1% and a softening point of 90-130DEG C. The phenolic resin is prepared by reacting phenol with formaldehyde, and conducting vacuum distillation to reduce free phenol. The invention also discloses a preparation method and application of the phenolic resin. The invention also discloses a rubber composition with the resin as rubber reinforcing resin. The preparation method provided by the invention has the advantages of less wastewater and simple operation.

Description

technical field [0001] The invention relates to the technical field of rubber industry, and relates to a phenolic resin, a preparation method and application thereof, and a rubber composition containing the phenolic resin. Background technique [0002] Thermoplastic phenolic resin is a reinforcing agent widely used in the rubber industry, and is also called phenolic reinforcing resin in the rubber industry. Because it is a thermoplastic resin, the phenolic reinforced resin can flow at the processing temperature of the rubber compound and does not affect the processing of the rubber compound. During vulcanization at high temperature, the methylene donor hexamethylenetetramine (HMT) or hexamethoxymethylmelamine (HMMM) cross-links the phenolic-reinforced resin to form a network that interacts with the vulcanized cross-linked network It forms an interpenetrating cross-linked network and works synergistically with carbon black to increase the hardness and modulus of the rubber c...

Claims

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Application Information

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IPC IPC(8): C08G8/10C08L61/10C08L7/00
Inventor 樊云峰
Owner SINO LEGEND CHINA CHEM
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