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Antioxidant treatment method for isoprene rubber

An isoprene rubber and a processing method technology, applied in the field of the composition of conjugated diene homopolymers or copolymers, can solve the problem of limited durability of antioxidants, difficult to meet long-term use, high volatility and migration, etc. problems, to achieve the effect of reasonable steps, convenient processing and good thermal stability

Inactive Publication Date: 2018-02-23
山东通泰橡胶股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it was found that the persistence of this antioxidant is limited, and it is difficult to meet the needs of long-term use
In the case of heat, the thermal oxidation effect is remarkable, the volatility and migration are relatively large, and it is easy to cause rubber coloring

Method used

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  • Antioxidant treatment method for isoprene rubber

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In the present embodiment, a kind of antioxidant treatment method of isoprene rubber, it goes through the following steps:

[0020] (1) 1 kg of antioxidant 1076, 0.7 kg of antioxidant 412S, 0.22 kg of antioxidant 1010 and 0.35 kg of antioxidant 38 were mixed, pulverized, and stirred uniformly to obtain a powdery composite antioxidant. The powdered compound antioxidant is granulated in a granulator, and the compound antioxidant of columnar particles is obtained through granulation;

[0021] (II) Dissolve the compound antioxidant of columnar particles obtained in step I in hexane to obtain a solution with a mass percentage of 20% and add according to the amount of compound antioxidant of columnar particles of 3.5 grams per kilogram of isoprene rubber Into the polyisoprene latex, adopt the hot water coagulation method to separate out the colloidal particles, and dehydrate the colloidal particles to obtain.

Embodiment 2

[0023] In the present embodiment, a kind of antioxidant treatment method of isoprene rubber, it goes through the following steps:

[0024] (I) 1 kg of antioxidant 1076, 0.5 kg of antioxidant 412S, 0.10 kg of antioxidant 1010 and 0.5 kg of antioxidant 38 were mixed, pulverized, and stirred evenly to obtain a powdery composite antioxidant. The powder Granulate the compound antioxidant in the granulator, and obtain the compound antioxidant of columnar particles through granulation;

[0025] (II) Dissolve the compounded antioxidant of the columnar particles obtained in step I in hexane to obtain a solution with a mass percentage of 15% and add the compounded antioxidant according to 2 grams of columnar particles per kilogram of isoprene rubber Into the polyisoprene latex, adopt the hot water coagulation method to separate out the colloidal particles, and dehydrate the colloidal particles to obtain.

Embodiment 3

[0027] In the present embodiment, a kind of antioxidant treatment method of isoprene rubber, it goes through the following steps:

[0028] (I) 1 kg of antioxidant 1076, 1.0 kg of antioxidant 412S, 0.40 kg of antioxidant 1010 and 0.2 kg of antioxidant 38 were mixed, pulverized, and stirred evenly to obtain a powdery composite antioxidant. The powder Granulate the compound antioxidant in the granulator, and obtain the compound antioxidant of columnar particles through granulation;

[0029] (II) Dissolve the compound antioxidant of the columnar particles obtained in step I in hexane to obtain a solution with a mass percentage of 25% and add according to the amount of the compound antioxidant of 5 grams of columnar particles per kilogram of isoprene rubber Into the polyisoprene latex, adopt the hot water coagulation method to separate out the colloidal particles, and dehydrate the colloidal particles to obtain.

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Abstract

The invention discloses an antioxidant treatment method for isoprene rubber. The antioxidant treatment method comprises the following steps: (I) mixing an antioxidant 1076, an antioxidant 412S, an antioxidant 1010 and an antioxidant 38, crushing and uniformly stirring to obtain a powdered compound antioxidant; granulating the powdered compound antioxidant in a granulator, and carrying out particlefinishing to obtain a columnar granular compound antioxidant; (II) dissolving the columnar granular compound antioxidant obtained in the step (I) in a solvent, adding into polyisoprene rubber latex,separating colloidal particles by adopting a hot water condensation method, and dehydrating the colloidal particles. The method disclosed by the invention has the advantages of reasonable steps, scientific antioxidant formula and feasible operation; the polyisoprene rubber obtained by the method disclosed by the invention has better thermal stability and longer-time oxidation resistance.

Description

technical field [0001] The invention relates to a composition of conjugated diene homopolymer or copolymer, especially an anti-oxidation treatment method for isoprene rubber. Background technique [0002] We know that isoprene rubber is formed by solution polymerization of isoprene, referred to as isoprene rubber. It is the synthetic rubber closest to natural rubber in terms of main physical and mechanical properties. It is a substitute for natural rubber and is widely used in the manufacture of tires and other rubber products, especially for light-colored products, medical products and edible rubber products. [0003] The production process of isoprene rubber is generally as follows: firstly, the raw material of isoprene is refined, then the isoprene is cooled and metered into the polymerization kettle with alkane, and then the polymerization catalyst is added into the polymerization kettle for polymerization. After the polymerization reaction is completed by controlling t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/215C08L9/02C08K5/00C08K5/134C08K5/372C08K5/526C08K13/02C08K3/22
CPCC08J3/215C08J2309/02C08K5/005C08K5/1345C08K5/372C08K5/526C08K13/02C08K2003/2241C08K2201/003C08K2201/011C08K2201/014C08L2201/08
Inventor 崔泉勇朱元军
Owner 山东通泰橡胶股份有限公司
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