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Carbon black-containing modified rubber and its preparation method

A modified rubber and rubber technology, which is applied in the field of modified rubber and its preparation, can solve the problems of weak rubber action, uneven dispersion, and large self-aggregation, and achieve enhanced action, improved dispersion, and elongation at break rate-enhancing effect

Active Publication Date: 2012-11-14
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the self-aggregation between carbon black particles is relatively large, the dispersion in the rubber matrix is ​​uneven, and the force with the rubber is weak, making it difficult to improve the performance of the rubber.

Method used

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  • Carbon black-containing modified rubber and its preparation method
  • Carbon black-containing modified rubber and its preparation method
  • Carbon black-containing modified rubber and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Sonicate 10 g of carbon black in 500 mL of N,N-dimethylformamide for 15 min. Add 20g of phenyl bromoisocyanate to this suspension, stir at 50°C for 24 hours; then add 15g of sodium azide, and react at 80°C for 24 hours; add 100g of nitrile rubber and 1.5g of CuBr, 65 °C for 48 hours. Cool to room temperature, remove the solvent under reduced pressure, wash the solid with water, and dry to obtain a modified rubber containing carbon black. Properties: Tensile strength 15.5MPa, elongation at break 370%.

Embodiment 2

[0031] Sonicate 60 g of carbon black in 400 mL of N,N-dimethylformamide for 10 minutes. Add 20g of 4-bromophenylisocyanate to this suspension, stir at 35°C for 20 hours; then add 10g of sodium azide, and react at 75°C for 32 hours; add 100g of hydrogenated nitrile rubber and 1.3g (PPh 3 ) 3 CuBr, react at 65°C for 40 hours. Cool to room temperature, remove the solvent under reduced pressure, wash the solid with water, and dry to obtain a modified rubber containing carbon black. Properties: Tensile strength 33.5MPa, elongation at break 820%.

Embodiment 3

[0035] Sonicate 30 g of carbon black in 300 mL of N,N-dimethylformamide for 20 minutes. Add 25g of 2-bromo-5-isocyanate thiophene to this suspension, stir at 40°C for 24 hours; then add 20g of sodium azide, and react at 85°C for 15 hours; add 100g of hydrogenated nitrile rubber and 2.5g (PPh 3 ) 3 CuI, reacted at 70°C for 48 hours. Cool to room temperature, remove the solvent under reduced pressure, wash the solid with water, and dry to obtain a modified rubber containing carbon black. Properties: tensile strength 28.0MPa, elongation at break 740%.

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Abstract

The invention provides a carbon black-containing modified rubber. Specifically, the carbon black is in covalent bond connection with rubber through a group containing carbamate and tetrazole. The carbon black accounts for 10%-60% of the weight of the rubber, which is calculated in terms of the mass of raw rubber. The invention also provides a preparation method of the modified rubber: reacting hydroxyl-containing carbon black with brominated isocyanate for 10-30 hours; then adding sodium azide for reaction for 10-48 hours; adding rubber and a Cu (I) catalyst for reaction for 24-72 hours; and carrying out washing as well as drying, thus obtaining the carbon black-containing modified rubber.

Description

technical field [0001] The invention relates to a modified rubber and a preparation method thereof, in particular to a modified rubber containing carbon black and a preparation method thereof. Background technique [0002] Carbon black is a carbon material with extremely special microstructure, particle morphology and surface properties. It is a fine black powdery substance formed by cracking and incomplete combustion of hydrocarbon substances (hydrocarbons such as oil or natural gas). Carbon black is widely used in the rubber industry to improve and enhance the physical and mechanical properties of rubber. However, the self-aggregation between carbon black particles is relatively large, the dispersion in the rubber matrix is ​​uneven, and the force with the rubber is weak, which makes it difficult to improve the performance of the rubber. The development of high-performance tires and other high-performance rubbers has prompted a lot of research on improving the dispersion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L15/00C08K9/04C08K9/02C08K3/04C08C19/22
Inventor 赵旭涛胡才仲张华强董静李艳芹胡育林高杜娟崔英赵洪国宋同江李晓艳龚光碧梁滔李晶陶惠平
Owner PETROCHINA CO LTD
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