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A kind of preparation method of cardanol modified alkyl resorcinol formaldehyde resin

A technology of alkyl resorcinol formaldehyde resin and resorcinol, which is applied in the field of preparation of cardanol modified alkyl resorcinol formaldehyde resin, can solve the problems of easy fuming, high price and high cost, and achieves Product cost reduction, better compatibility, good flexibility

Inactive Publication Date: 2015-12-30
于文明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Resorcinol-formaldehyde resin can be prepared by reacting resorcinol with formaldehyde solution, which is a raw material widely used in chemical industries such as tires and adhesives. , pollute the air environment, and the application in the adhesive industry leads to brittle products after sizing, and is expensive, and its application range is limited. The alkyl resorcinol resin modified by styrene makes its performance Much improved, but still expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] According to resorcinol, cardanol, formaldehyde solution, styrene, and p-toluenesulfonic acid, the raw materials are weighed according to the following weight ratio: resorcinol: cardanol: formaldehyde solution: styrene: p-toluenesulfonic acid is 50:25 :25:30:0.5;

[0022] Put resorcinol, cardanol, and p-toluenesulfonic acid into the reactor by weight and mix them evenly. When the temperature rises to 120-130°C, start to add styrene dropwise, and finish dropping in 25-35 minutes. After dropping, maintain 1.5 Hours, drop formaldehyde solution when the temperature drops to 90-110°C, drop it in 55-65 minutes, then react at this temperature for 2 hours, add 20% NaOH solution to adjust the pH to 7, then heat up and distill and dehydrate to get reddish brown The transparent resin is a cardanol-modified alkyl resorcinol formaldehyde resin, and the softening point of the resin is 93°C.

Embodiment 2

[0024] According to resorcinol, cardanol, formaldehyde solution, styrene, and p-toluenesulfonic acid, the raw materials are weighed according to the following weight ratio: resorcinol: cardanol: formaldehyde solution: styrene: p-toluenesulfonic acid is 55:32.5 :30:35:0.75.

[0025] Put resorcinol, cardanol, formaldehyde solution, styrene, and p-toluenesulfonic acid into the reactor by weight and mix them evenly. When the temperature rises to 120-130°C, start to add styrene dropwise and finish dropping in 25-35 minutes After dropping, keep it for 1.5 hours, drop the temperature to 90-110°C and start adding formaldehyde solution, drop it in 55-65 minutes, then react at this temperature for 2 hours, add 20% NaOH solution to adjust the pH to 7, and then The reddish-brown transparent resin obtained by heating and distilling and dehydrating is the cardanol-modified alkyl resorcinol formaldehyde resin, and the softening point of the resin is 97°C.

Embodiment 3

[0027] According to resorcinol, cardanol, formaldehyde solution, styrene, and p-toluenesulfonic acid, the raw materials are weighed according to the following weight ratio: resorcinol: cardanol: formaldehyde solution: styrene: p-toluenesulfonic acid is 60:40 :35:40:1.0;

[0028] Put resorcinol, cardanol, formaldehyde solution, styrene, and p-toluenesulfonic acid into the reactor by weight and mix them evenly. When the temperature rises to 120-130°C, start to add styrene dropwise and finish dropping in 25-35 minutes After dropping, keep it for 1.5 hours, drop the temperature to 90-110°C and start adding formaldehyde solution, drop it in 55-65 minutes, then react at this temperature for 2 hours after dropping, add 20% NaOH solution to adjust the pH to 7, and then The reddish-brown transparent resin obtained by heating and distilling and dehydrating is the cardanol-modified alkyl resorcinol formaldehyde resin, and the softening point of the resin is 102°C.

[0029] The softening...

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Abstract

The invention belongs to the technical field of chemical synthesis and in particular relates to a preparation method of a cardanol modified alkylresorcinol-formaldehyde resin. The preparation method comprises the following steps: (1) putting resorcinol, cardanol and p-toluenesulfophenol into a reactor to be mixed uniformly and heating the mixture; (2) dropwise adding styrene and maintaining for 1.5 hours after dropping; (3) cooling the mixture, beginning dropwise adding a formaldehyde solution and reacting at the reduced temperature for 2 hours after dropping; and (4) adding a pH regulator to regulate the pH to 7 and then carrying out heating, distilling and dehydrating to obtain a red brown transparent resin, thus obtaining the cardanol modified alkylresorcinol-formaldehyde resin. The modified alkylresorcinol-formaldehyde resin has better intermiscibility with rubbers and better flexibility, and meanwhile, the product cost is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a preparation method of cardanol-modified alkyl resorcinol formaldehyde resin. Background technique [0002] Resorcinol-formaldehyde resin can be prepared by reacting resorcinol with formaldehyde solution, which is a raw material widely used in chemical industries such as tires and adhesives. , pollute the air environment, and the application in the adhesive industry leads to brittle products after sizing, and is expensive, and its application range is limited. The alkyl resorcinol resin modified by styrene makes its performance Much improved, but still costly. Therefore, improving performance and reducing its cost is still a difficult problem to be solved urgently. Contents of the invention [0003] In order to solve the above-mentioned technical problem, the invention provides a kind of preparation method of cardanol modified alkyl resorcinol formalde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/28C08G8/30
Inventor 于文明于冰王明彦
Owner 于文明
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