Preparation method of antioxidant for nitrile rubber

A technology of nitrile rubber and antioxidant, applied in the field of preparation of antioxidant for environment-friendly nitrile rubber

Active Publication Date: 2020-07-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Amine antioxidants can capture macromolecular free radicals (R ), and phosphite antioxidants can decompose hydroperoxides, thereby inhibiting the degradation of polymers caused by autocatalytic reactions. When used together, their effects complement each other , can achieve the desired synergistic effect to overcome the deficiency of a single antioxidant

Method used

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  • Preparation method of antioxidant for nitrile rubber

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Accurately weigh 60g of carbonyl-4,4-diisoidene-fatty alcohol-phosphate chelate, 20g of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid octadecyl ester, 40g 4,4'-bis(phenylisopropyl)diphenylamine, firstly add carbonyl-4,4-diisopropylidene-fatty alcohol-phosphate chelate into the beaker, stir and heat to 85℃, then add β -(3,5-Di-tert-butyl-4-hydroxyphenyl) octadecyl propionate and 40g 4,4'-bis(phenylisopropyl)diphenylamine, keep stirring until the solid antioxidant is completely melted , add 40g potassium oleate soap liquid, 10g dodecyl polyglycoside in turn, emulsification for 5 minutes under high-speed stirring at 15000 r / min, add 30g deionized water, continue stirring and emulsification for 5 minutes, cool down to 25 ℃ and let stand Storage, preparation to the antioxidant product of the present invention.

Embodiment 2

[0037] Accurately weigh 80g of carbonyl-4,4-diisoidene-fatty alcohol-phosphate chelate, 10g of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid octadecyl ester, 30g butyl octylated diphenylamine, firstly, carbonyl-4,4-diisoidene-fatty alcohol-phosphate chelate will be added to the beaker, heated to 88°C with stirring, and then add β-(3,5-diphenylamine) tert-butyl-4-hydroxyphenyl) octadecyl propionate and butyl octyl diphenylamine, keep stirring until the solid antioxidant melts completely, add 36g potassium oleate soap solution, 4g octyl polyglycoside, Emulsify for 5 minutes under high-speed stirring at a rotational speed of 15,000 rpm, add 40 g of deionized water, continue stirring and emulsification for 5 minutes, cool down to 28° C. for storage, and prepare the antioxidant product of the present invention.

Embodiment 3

[0039] Accurately weigh 60g of diphenylisodecyl phosphite, 10g of 2,2'-ethylene-bis(4,6-di-tert-butylphenol), 30g of 4,4'-bis(phenylisopropyl) ) diphenylamine, add diphenylisodecyl phosphite into a beaker, stir and heat to 80°C, then add 2,2'-ethylene-bis(4,6-di-tert-butylphenol) and 4,4'-bis(phenylisopropyl)diphenylamine, keep stirring until the solid antioxidant melts completely, add 36g potassium disproportionate rosinate soap solution, 4g dodecyl polyglycoside, rotate at 15000 rpm Emulsify for 5 minutes under high-speed stirring, add 60 g of deionized water, continue to stir and emulsify for 5 minutes, cool down to 30° C. for storage, and prepare the antioxidant product of the present invention.

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Abstract

The invention relates to the technical field of preparation methods of antioxidants, in particular to a preparation method of an antioxidant for nitrile rubber, which comprises the following steps: proportionally mixing phenols, amines and phosphite antioxidants, stirring and heating to obtain a molten liquid, and emulsifying by using a composite emulsifier to form an antioxidant microemulsion with the particle size of less than 600nm and the viscosity of less than 500Pa. S. The antioxidant emulsion prepared by the invention has the advantages of good anti-aging effect, high activity, small thermal weight loss, high storage stability, environmental protection and the like.

Description

technical field [0001] The invention relates to the technical field of antioxidant preparation methods, in particular to a preparation method of an environmentally friendly nitrile-butadiene rubber antioxidant. Background technique [0002] Nitrile rubber (acrylonitrile-butadiene rubber; nitrile rubber, NBR) is an important product in the industrial and automotive rubber products industry. It is actually a product system of acrylonitrile and butadiene unsaturated copolymers. In the automotive industry, the rubber is used in fuel and oil transfer hoses, seals and gaskets, and in water treatment applications. Use temperature -40℃~125℃. NBR can be used in almost all demanding automotive applications. In industry, NBR can be used for the sealing of rubber rollers, hydraulic hoses, conveyor belts, miscellaneous parts, oil field packers, and various pipe fittings and supplies. [0003] In recent years, with the rapid development of various industries in China, the demand for n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/00C08K5/521C08K5/134C08K5/18C08K5/524C08K5/13C08L9/02C08L71/08
CPCC08K5/00C08K5/521C08K5/1345C08K5/18C08K5/524C08K5/13C08L9/02C08L2201/08C08L71/00
Inventor 张志强杨珊珊于奎周雷燕鹏华钟启林李晶梁滔龚光碧张元寿桂强赵洪国王永峰邵卫胡育林
Owner PETROCHINA CO LTD
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