Large-particle-size lignin/butadiene styrene rubber composite particle and synthesis method thereof

A technology of styrene-butadiene rubber and composite particles is applied in the field of rubber composite materials, which can solve the problems of small particle size of lignin/styrene-butadiene rubber composite particles, achieve good physical and mechanical properties, anti-thermal oxidation aging performance, and improve compatibility. , The effect of reducing equipment failure and rubber loss

Active Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem that the particle size of lignin / styrene-butadiene rubber composite particles synthesized by the existing liquid phase co-precipitation method is too small, the present invention provides a large particle size lignin / styrene-butadiene rubber composite particle and its synthesis method

Method used

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  • Large-particle-size lignin/butadiene styrene rubber composite particle and synthesis method thereof

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Effect test

Embodiment 1

[0045] (1) Mix 10g of alkali lignin, 3g of epichlorohydrin, 50mL of toluene, and 1.0g of sodium hydroxide, react at 60°C and 500rpm for 3 hours, and remove unreacted materials by vacuum distillation after completion of the reaction to obtain Modified lignin, wherein the epoxy equivalent of the modified lignin is 810g / mol.

[0046] (2) Prepare a mixture of modified lignin and deionized water in step (1) at a mass ratio of 1:10, and add styrene-butadiene with a solid content of 24wt% as modified lignin accounts for 10% of the mass of styrene-butadiene rubber latex The rubber latex was reacted at 500r / min for 5min to obtain a modified lignin / styrene-butadiene rubber latex mixture.

[0047] (3) Configure a sodium chloride solution with a mass concentration of 0.2%. Under the conditions of 60°C and 150r / min, according to the mass ratio of the mixed solution to the sodium chloride solution as 1:2, the mixed solution is mixed at a speed of 10mL / s Add it to the sodium chloride soluti...

Embodiment 2

[0049] (1) Mix 10g of alkali lignin, 3g of epichlorohydrin, 30mL of toluene, and 0.5g of potassium hydroxide, and react at 40°C and 100rpm for 2 hours. After the reaction is completed, unreacted materials are removed by vacuum distillation to obtain Modified lignin, wherein the epoxy equivalent of the modified lignin is 1050g / mol.

[0050] (2) Make a mixed solution of modified lignin and deionized water in step (1) at a mass ratio of 1:5, and add styrene-butadiene with a solid content of 20wt% according to the modified lignin accounting for 5% of the mass of styrene-butadiene rubber latex The rubber latex was reacted at 500r / min for 5min to obtain a modified lignin / styrene-butadiene rubber latex mixture.

[0051] (3) Configure a potassium chloride solution with a mass concentration of 0.1%. Under the conditions of 30°C and 100r / min, the mass ratio of the modified lignin / styrene-butadiene rubber latex mixture to the potassium chloride solution is 1:1. Add the mixed solution to...

Embodiment 3

[0053] (1) Mix 10g of alkali lignin, 10g of epichlorohydrin, 100mL of toluene, and 2g of potassium hydroxide, and react at 80°C and 1000rpm for 4 hours. After the reaction is completed, unreacted materials are removed by vacuum distillation to obtain the improved Permanent lignin, wherein the epoxy equivalent of modified lignin is 720g / mol.

[0054] (2) Make a mixed solution of modified lignin and deionized water in step (1) at a mass ratio of 1:15, and add styrene-butadiene with a solid content of 30wt% as modified lignin accounts for 30% of the mass of styrene-butadiene rubber latex The rubber latex was reacted at 500r / min for 10min to obtain a modified lignin / styrene butadiene rubber latex mixture.

[0055] (3) Configure a sodium sulfate solution with a mass concentration of 1.0%. Under the conditions of 80°C and 300r / min, the mass ratio of the modified lignin / styrene-butadiene rubber latex mixture to the sodium sulfate solution is 1:3. The solution was added to the sodium...

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Abstract

The invention relates to a large-particle-size lignin/butadiene styrene rubber composite particle and a synthetic method thereof, and the synthetic method specifically comprises the following steps: mixing lignin, epichlorohydrin, an organic solvent and alkali for reaction to obtain modified lignin; mixing with water, and adding styrene butadiene rubber latex for reaction to obtain a mixed solution; and adding the mixed solution and the inorganic acid solution into the electrolyte solution to react, separating out solid composite particles, filtering, washing and drying to obtain the product. According to the method disclosed by the invention, when the large-particle-size composite particles are prepared, the synthesized composite particles are used for preparing lignin-based styrene-butadiene rubber by mixing, and have good comprehensive use performance.

Description

technical field [0001] The invention belongs to the field of rubber composite materials, and in particular relates to a large-diameter lignin / styrene-butadiene rubber composite particle and a synthesis method thereof. Background technique [0002] Lignin is a natural organic polymer with an aromatic ring structure, second only to cellulose in nature, but so far humans have not found a way to utilize industrial lignin resources, and more than 95% of lignin is directly discharged into rivers Or concentrated and burned, causing environmental pollution and waste of resources. Lignin is degradable, non-toxic, renewable, low density, and lignin and its derivatives contain more active groups (aryl groups, alcoholic hydroxyl groups, carboxyl groups, methoxyl groups, conjugated double bonds, etc.), with important application value. [0003] At present, some researchers add lignin to styrene-butadiene rubber to improve the mechanical properties of rubber such as tensile strength, co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/06C08L97/00C08H7/00C08J3/00
CPCC08L9/06C08H6/00C08J3/005C08J2309/06C08J2497/00C08L97/005Y02T10/86
Inventor 张通白毓黎白富栋李澜鹏彭绍忠乔凯
Owner CHINA PETROLEUM & CHEM CORP
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