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A kind of method for preparing hydrogenated copolymer from conjugated diene hydrogenated latex

A technology of conjugated dienes and hydrogenated copolymers, which is applied in the field of hydrogenated copolymers prepared from conjugated dienes hydrogenated latex, can solve the problems of easy gel formation, poor conversion rate, and increased costs, and reduce the total amount of additives. The effect of adding amount, reducing industrial cost, and reducing the amount of catalyst

Active Publication Date: 2022-04-22
山东京博中聚新材料有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both methods have the problems of hydrogenation reaction rate, poor conversion rate and easy gel formation, and the hydrogenation reaction usually needs to be carried out in the presence of organic solvents. Due to the use of organic solvents, environmental pollution and cost increase

Method used

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  • A kind of method for preparing hydrogenated copolymer from conjugated diene hydrogenated latex
  • A kind of method for preparing hydrogenated copolymer from conjugated diene hydrogenated latex
  • A kind of method for preparing hydrogenated copolymer from conjugated diene hydrogenated latex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] S1. Add 50 mL of latex and 0.000118 g of Hevida-Grubbs II into the reactor.

[0095] S2. Add 50 mL of latex, 2 g of potassium oleate, and 1 g of sodium tetradecenyl sulfonate, and stir at 200 rpm for 30 min.

[0096] S3. Nitrogen gas is introduced into the system, the degassing temperature is 25° C., the pressure is 2 MPa, the time is 60 minutes, and the stirring speed is 200 rpm during degassing; after the degassing is completed, continue stirring for 4 hours.

[0097] S4. Raise the temperature to 90° C., raise the nitrogen pressure to 800 psi (5.52 MPa), and react for 50 minutes. The hydrogenated NBR latex is coagulated with ethanol to obtain a HNBR copolymer.

[0098] Infrared tests were carried out on the samples before and after hydrogenation, and the results were as follows: figure 1 as shown, figure 1 It is the infrared spectrogram of the sample before and after hydrogenation in Example 1 of the present invention. Wherein the upper line is the raw material, t...

Embodiment 2

[0102] S1. Add 50 mL of latex and 0.000122 g of Hevida-Grubbs II into the reactor.

[0103] S2. Add 50 mL of latex, 2 g of potassium oleate, and 0.5 g of sodium tetradecenyl sulfonate, and stir at 200 rpm for 30 min.

[0104] S3. Nitrogen gas is introduced into the system, the degassing temperature is 25° C., the pressure is 2 MPa, the time is 60 minutes, and the stirring speed is 200 rpm during degassing; after the degassing is completed, continue stirring for 4 hours.

[0105] S4. Raise the temperature to 90° C., raise the nitrogen pressure to 800 psi (5.52 MPa), and react for 85 minutes. The hydrogenated NBR latex is coagulated with ethanol to obtain a HNBR copolymer.

[0106] The results showed that no gel was produced in the reaction, and the obtained polymer was soluble in methyl ethyl ketone.

Embodiment 3

[0108] S1. Add 50 mL of latex and 0.000117 g of Hevida-Grubbs II into the reactor.

[0109] S2. Add 50 mL of latex, 2 g of potassium oleate, and 0.3 g of sodium tetradecenyl sulfonate, and stir at 200 rpm for 30 min.

[0110] S3. Nitrogen gas is introduced into the system, the degassing temperature is 25° C., the pressure is 2 MPa, the time is 60 minutes, and the stirring speed is 200 rpm during degassing; after the degassing is completed, continue stirring for 4 hours.

[0111] S4. The temperature is raised to 90° C., the hydrogen pressure is raised to 800 psi (5.52 MPa), and the reaction is carried out for 150 minutes. The hydrogenated NBR latex is coagulated with ethanol to obtain a HNBR copolymer.

[0112] The results showed that no gel was produced in the reaction, and the obtained polymer was soluble in methyl ethyl ketone.

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Abstract

The invention provides a method for preparing a hydrogenated copolymer from a conjugated diene latex by hydrogenation: mixing part of the conjugated diene latex with Hevida-Grubbs II catalyst to obtain a mixture A; mixing the remaining conjugated diene latex , the mixture A is mixed with the compounding auxiliary agent to obtain the mixture B; the compounding auxiliary agent is selected from sodium oleate, potassium oleate, sodium tetradecenyl sulfonate, potassium tetradecenyl sulfonate, linear A combination of two or more of alkyl sulfates and alkyl betaines; Nitrogen gas is introduced into the mixture B for stirring and degassing treatment, after which the stirring process is continued to obtain a mixture C; for the mixture C Raise the temperature and feed hydrogen to carry out the hydrogenation reaction to obtain a hydrogenated copolymer. Through the mixing method of adding in batches, introducing specific composite additives, nitrogen degassing treatment and then stirring, the selective hydrogenation of conjugated dienes can be realized, the amount of catalyst can be reduced, products with high hydrogenation degree can be obtained, the reaction rate can be accelerated, and the catalytic efficiency.

Description

technical field [0001] The invention relates to the technical field of catalytic hydrogenation, in particular to a method for preparing a hydrogenated copolymer from a conjugated diene hydrogenated latex. Background technique [0002] The research and development of hydrogenated diene-based rubber products is mainly based on the application environment of rubber parts, through formula design and subsequent processing methods to obtain rubber products with required properties. At present, whether in the laboratory or in industrial production, there are mainly three ways to hydrogenate the parent diene-based unsaturated polymer to prepare hydrogenated diene-based rubber, such as nitrile rubber prepared by polymerization of acrylonitrile and butadiene (also known as NBR), taking NBR as an example, three preparation methods are as follows: [0003] (1) Acrylonitrile-ethylene copolymerization method. In the ethylene-acrylonitrile copolymerization reaction, since there is a larg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08C19/02
CPCC08C19/02
Inventor 王辉曹峰郭宗磊佟伟超赵而英周德芳王勇杜庆之王传奇郝福兰王英超任学斌黎艳艳栾波
Owner 山东京博中聚新材料有限公司
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