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Rubber antiager and method for preparing same

A rubber antioxidant and antioxidant technology, applied in the direction of zinc organic compounds, etc., can solve the problems affecting long-term performance, adverse transportation, processing and storage, product pollution, etc., to improve long-term protection performance, improve discoloration migration performance, The effect of excellent anti-aging properties

Active Publication Date: 2011-09-28
常州市五洲化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] N-isopropyl-N'-phenyl-p-phenylenediamine is easily extracted and lost by water or solvents (up to 50%), affecting long-term performance
And it is easy to change color and migrate, thus polluting the product
It is also irritating and toxic, which can easily cause skin allergies
[0004] Compared with N-isopropyl-N'-phenyl-p-phenylenediamine, N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine is resistant to water extraction and solvent resistance Slightly better in terms of extraction loss and toxicity, but there is still a serious problem of discoloration
And it is easy to melt and agglomerate, which is not conducive to transportation, processing and storage, especially when the temperature is high in summer or during container stacking and transportation, it is very easy to melt or self-adhesive blocks

Method used

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  • Rubber antiager and method for preparing same
  • Rubber antiager and method for preparing same
  • Rubber antiager and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The rubber anti-aging agent of the present embodiment is an optimized rubber anti-aging agent, which is composed of N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine and polymethyl terephthalate calcium zinc salt The raw materials are obtained through a complex reaction, and the weight ratio of the two is 2.5:1.

[0017] Wherein the structural formula of polymethyl terephthalate calcium zinc salt is:

[0018]

[0019] The preparation method of this optimized rubber antioxidant comprises:

[0020] ① Dissolve 250kg of N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine in 250kg of acetone solution to obtain a mixed solution, then add it to the metering tank for use.

[0021] ② Add 166kg of 60wt% polymethyl terephthalate calcium zinc salt aqueous solution and 0.5kg of tetrabutylammonium chloride to a 1000L enamel reaction kettle with a cooling reflux device at the same time, and at a speed of 500r / min Stir.

[0022] ③Introduce high-temperature steam into the jacket o...

Embodiment 2

[0042] The rubber anti-aging agent of this embodiment is an optimized rubber anti-aging agent, which is obtained by complexing reaction of N-isopropyl-N'-phenyl-p-phenylenediamine and polymethyl terephthalate calcium zinc salt as raw materials. The weight ratio of those is 3:1.

[0043] The preparation method of this optimized rubber antioxidant comprises:

[0044] ① Dissolve 300kg of N-isopropyl-N'-phenyl-p-phenylenediamine in 200kg of acetone solution to obtain a mixed solution, then add it to the metering tank for use.

[0045] ② Add 160kg of 66wt% polymethyl terephthalate calcium zinc salt aqueous solution and 0.5kg of tetrabutylammonium chloride to a 1000L enamel reaction kettle with a cooling reflux device at the same time, and at a speed of 550r / min Stir.

[0046] ③Introduce high-temperature steam into the jacket of the enamel reaction kettle in step ② to heat up the material in the reaction kettle to 120°C. Add the enamel reaction kettle, and make the weight ratio o...

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Abstract

The invention discloses a rubber antioxidant and a preparation method thereof. The rubber antioxidant is prepared through the complex reaction of para-phenylene diamine antioxidant and autunite-zinc polymethyl terephthalate; wherein the weight ratio of para-phenylene diamine antioxidant to autunite-zinc polymethyl terephthalate is 2:1-3:1. The preparation method includes the following steps: 1)dissolving para-phenylene diamine antioxidant in acetone solution based on weight ratio of 1:1-1.5:1, producing a mixture solution; 2)adding autunite-zinc polymethyl terephthalate aqueous solution and hyamine catalyzer at the same time into a reactor and blending the two; 3)introducing high temperature steam to the jacket of the reactor and when the temperature reaches 110-120 DEG C, adding the mixture ssolution prepared in step 1); 4) conducting complex reaction for 1.5-3h when the material is at infinite reflux state and finally distilling and recovering the acetone. The rubber antioxidant is of excellent ageing resistance and is free from problems of serious color deterioration, fusion and agglomeration.

Description

technical field [0001] The invention relates to a rubber antioxidant and a preparation method thereof, in particular to a p-phenylenediamine rubber antioxidant and a preparation method thereof. Background technique [0002] As we all know, N-isopropyl-N'-phenyl-p-phenylenediamine (rubber anti-aging agent 4010NA) and N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine (rubber anti-aging Agent 4020) are currently the two p-phenylenediamine antioxidants with the best comprehensive performance. They have excellent properties such as thermal oxygen aging resistance, ozone aging resistance, flex cracking resistance aging and harmful metal ion aging resistance. But these two antioxidants also have the following disadvantages. [0003] N-isopropyl-N'-phenyl-p-phenylenediamine is easily extracted and lost by water or solvent (up to 50%), which affects long-term performance. Moreover, it is easy to change color and migrate, thereby polluting the product. There are also stimulating ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/18C08L21/00C07F3/06
Inventor 方春平彭均
Owner 常州市五洲化工有限公司
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