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Novel process for synthesizing bead granular rubber antioxidant

A granular rubber and antioxidant technology, which is applied in the field of rubber antioxidant TMQ production, can solve the problems of complex process, high production cost, and serious dust pollution of the final product, and achieve good fluidity, dispersibility, and high purity.

Inactive Publication Date: 2008-03-05
KEMAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two-step method has complicated process, high production cost, serious dust pollution of the final product, poor fluidity and dispersibility of the product during use, and automatic weighing cannot be realized
Literature (Fine Petrochemical Industry, 2005, 5: 36) has reported the process research of one-step catalytic synthesis of anti-aging agent TMQ, and the optimal reaction conditions obtained are: BF 3 For the catalyst, BF 3 / aniline (molar ratio) = 0.05: 1, acetone added time 4h, aniline / acetone (molar ratio) = 2.5: 1, the product has good quality, but there are also poor fluidity and dispersibility of the product, and automatic weighing cannot be realized. quantity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0009] 10 grams of hydrochloric acid, 20 grams of aniline and 60 grams of acetone were added to the reaction kettle at 80°C and a rotation speed of 500 rpm, and reacted for 3 hours to obtain an antioxidant TMQ gel with a content of 60%. The 60% antioxidant TMQ gel is fed into a granulation tube with a diameter of 2 mm under a pressure of 2 MPa to obtain a beaded rubber antioxidant TMQ with a diameter of 2 mm.

example 2

[0011] 15 grams of hydrochloric acid, 45 grams of aniline and 90 grams of acetone were added to the reactor at 100°C and 300 rpm, and reacted for 4 hours to obtain an antioxidant TMQ gel with a content of 65%. 65% of antioxidant TMQ gel is input under the pressure of 3MPa in the granulation pipe with diameter of 5mm to obtain the beaded rubber antioxidant TMQ with diameter of 5mm.

example 3

[0013] 20 grams of hydrochloric acid, 140 grams of aniline and 560 grams of acetone were added to the reactor at 130°C and 700 rpm, and reacted for 9 hours to obtain 85% antioxidant TMQ gel. 85% of antioxidant TMQ gel was fed into a granulation tube with a diameter of 10 mm under a pressure of 6 MPa to obtain a beaded rubber antioxidant TMQ with a diameter of 10 mm.

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Abstract

The process of producing granular rubber antioxidant TMQ includes the following steps: feeding aniline, acetone in 1-10 times weight of aniline and hydrochloric acid as catalyst in 0.1-0.5 times weight of aniline into a reaction kettle, reaction at 80-190 deg.c temperature and 200-1200 rpm rotation speed for 2-10 hr to obtain antioxidant TMQ gel with content of 60-90 %; and pelletizing inside a pelletizing pipe at 2-10 MPa to produce granular rubber antioxidant TMQ of 1-10 mm granularity. The granular rubber antioxidant TMQ has high purity and is used for radial ply tire.

Description

technical field [0001] The invention relates to a new synthesis process of bead-shaped rubber antioxidant 2,2,4-trimethyl-1,2-dihydroquinoline polymer (TMQ), which belongs to the technical field of rubber antioxidant TMQ production. Background technique [0002] Antioxidant TMQ for automotive radial tires is a general-purpose antioxidant with excellent anti-oxidation (anti-aging) performance in the rubber industry. It is widely used in various tires, rubber hoses, tapes and other rubber products. At present, the production of TMQ products by traditional technology has a series of problems such as low effective content, unable to meet the production requirements of radial tires, serious dust pollution during product production and use, poor product fluidity, and inability to realize automatic metering and uniform dispersion. The literature (Chinese patent, application number: CN 200410070777.5) reported a method for high-purity 2,2,4-trimethyl-1,2-dihydroquinoline polymer (TM...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G12/00C08L21/00
Inventor 王树华洪学斌王树领王树恒孟庆保
Owner KEMAI CHEM
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