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Preparation method of alkylresorcinol formaldehyde resin

A technology of alkyl resorcinol formaldehyde resin and resorcinol, which is applied in the field of preparation of rubber additives, and can solve problems such as harmful exhaust gases that affect product quality

Inactive Publication Date: 2013-05-08
JIANGSU GUOLI CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, resorcinol and resins processed with resorcinol are commonly used as adhesives in tire rubber products, but due to the free state of resorcinol in rubber products during mixing, it will affect product quality and generate harmful waste gas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] (1) Add 250 kg of resorcinol to the reaction kettle to heat and melt, and add 6 kg of oxalic acid as a catalyst;

[0011] (2) Continue heating to 120 degrees Celsius and add 125kg of styrene dropwise, and react for half an hour;

[0012] (3) When the temperature drops to 100 degrees Celsius, 125kg of formaldehyde solution is added dropwise and reacted for one hour;

[0013] (4) After dehydration, add 250kg of styrene and react at 120 degrees Celsius for 30 minutes;

[0014] (5) Add sodium hydroxide solution to neutralize, distill, and control the softening point at 90-120 degrees Celsius.

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PUM

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Abstract

The invention relates to a preparation method of an alkylresorcinol formaldehyde resin for a rubber product. The alkylresorcinol formaldehyde resin is prepared from resorcinol, formaldehyde and styrene through alkylation reaction and hydroxylation reaction. The alkylresorcinol formaldehyde produced by the process provided by the invention can not produce free resorcinol easily during use, causes no pollution, and does not influence the product quality.

Description

technical field [0001] The invention relates to a preparation method of a rubber auxiliary agent, in particular to a preparation method of an alkyl resorcinol formaldehyde resin. technical background [0002] At present, resorcinol and resins processed with resorcinol are commonly used as adhesives in tire rubber products, but because rubber products will produce resorcinol free state during mixing, it will affect product quality and generate harmful exhaust gas. Contents of the invention [0003] The present invention provides a kind of rubber adhesive that does not have waste gas, does not affect product quality, alkyl resorcinol formaldehyde resin for above-mentioned technical problem, comprises the following steps: [0004] (1) Add resorcinol to the reaction kettle to heat and melt, and add catalyst oxalic acid; [0005] (2) Continue heating to 120 degrees Celsius and drop styrene, the amount of styrene added is half the weight of resorcinol, and react for half an hou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/30C08G8/22
Inventor 胡立新郎旭东宗红兴
Owner JIANGSU GUOLI CHEM TECH
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