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Method for preparing resorcinol resins

A resorcinol resin and resorcinol technology, which is applied in the field of resorcinol resin methylene acceptors, can solve the problems of unsatisfactory resin adhesion performance, difficulty in evenly dispersing resin, and inability to carry out thorough treatment, etc., to achieve Solve the problem of smoke and weight loss, strong resin adhesion, and improve the effect of adhesion

Active Publication Date: 2009-01-07
JIANGSU GUOLI CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modification is to use bisphenol A epoxy resin with double etherification reaction groups, so the etherification reaction will form a high polymer, and the molecular weight is too large, which makes it difficult for the obtained resin to disperse evenly in the rubber system
In order to control the production of high polymers, the reaction cannot be carried out thoroughly, so there is still a certain amount of free resorcinol, and the problems of fuming and weight loss still exist; secondly, the adhesive performance of the resin is not ideal.
[0015] Therefore, although prior art has multiple p-resorcinol modification, all fails to thoroughly overcome its deficiency, and modification all has certain deficiency, still has the place worth improving

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: add resorcinol 50g (0.455mol) and 100g ethanol in the 500ml reaction bottle, slowly stir and be warmed up to 75 ℃ after logical nitrogen replacement bottle air, pass through dropping funnel and screw feeder respectively, simultaneously respectively Add 242 g (0.91 mol) of 15% sodium hydroxide ethanol solution and 196 g (0.91 mol) of 2-chloromethylthiobenzothiazole, and the addition time is about 90 minutes. Continue to stir and keep warm for 30 minutes after the addition is complete. Then cool to room temperature. Filter and wash the filter cake three times with ethanol, each with 15 g of ethanol. After the filter cake is dried, it is the finished resorcinol resin.

Embodiment 2

[0030] Embodiment 2. add resorcinol 50g (0.455mol) and 100g ethanol in the 500ml reaction bottle, slowly stir and be warming up to 75 ℃ after logical nitrogen replacement bottle air, pass through dropping funnel and screw feeder respectively, simultaneously respectively Add 242 g (0.91 mol) of 15% sodium hydroxide ethanol solution and 209 g (0.91 mol) of 2-chloroethylthiobenzothiazole, and the addition time is about 90 minutes. Continue to stir and keep warm for 30 minutes after the addition is complete. Then cool to room temperature. Filter and wash the filter cake three times with ethanol, each with 15 g of ethanol. After the filter cake is dried, it is the finished resorcinol resin.

Embodiment 3

[0031] Embodiment 3. add resorcinol 50g (0.455mol) and 100g ethanol in the 500ml reaction flask, slowly stir and be warming up to 75 ℃ after logical nitrogen replacement bottle air, pass through dropping funnel and screw feeder respectively, simultaneously respectively 182g (0.683) of 15% sodium hydroxide ethanol solution was added dropwise, and 147.2g (0.683) of 2-chloromethylthiobenzothiazole was gradually added, and the addition time was about 90 minutes. Continue to stir and keep warm for 30 minutes after the addition is complete. Then cool to room temperature. Filter and wash the filter cake three times with ethanol, each with 15 g of ethanol. After the filter cake is dried, it becomes resorcinol resin.

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PUM

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Abstract

The invention relates to improved resorcinol resin of methylene acceptor in a system of rubber and steel cord adhesives. The invention is characterized in that hydroxyphenol and azole compounds with monoetherification functional groups, by the molar ration of 1:1 to 1:2, are etherified partially or totally under the protection of nitrogen. The obtained resin not only has no dissociation hydroxyphenol basically, thereby completely solving the problems of the smoke formation and the weight reduction of the hydroxyphenol generated under the high temperature of mixing and having good environment protection, but also the resin has stronger acceptance capacity for methylene, adding that the molecule contains azole heterocycle structures, the tests indicate that the adhesion bonding force between the rubber and the steel cord adhesives is improved.

Description

technical field [0001] The invention relates to an improved methylene acceptor resorcinol resin in the adhesive system between rubber and steel cords, especially a resorcinol resin methylene with good environmental protection and strong adhesion base acceptor. Background technique [0002] Resorcinol resin is the methylene acceptor in the direct adhesive system between rubber and steel cords. However, in the synthesis of resorcinol resin, it is often impossible to make it react completely, so there is a certain amount of free resorcinol, which will sublimate and release toxic and irritating smoke (smog for short) at high temperature during mixing. It not only endangers human health and pollutes the environment, but also leads to inaccurate measurement due to sublimation, which adversely affects the performance of products. For this reason, people have adopted various modifications to reduce free resorcinol, reduce fuming and weight loss at high temperature during mixing. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/40
Inventor 陈光炎胡立新郎旭东
Owner JIANGSU GUOLI CHEM TECH