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Method for preparing rubber powder/natural rubber liquid-phase mixed compound rubber

A technology of natural rubber and liquid phase mixing, which is applied in the field of preparation of natural rubber composite rubber, can solve the problems of product physical and mechanical properties and processing performance reduction, uneven dispersion, and poor compatibility of rubber powder blending, etc., to improve the physical Mechanical properties, good dispersibility, and the effect of improving uniformity

Inactive Publication Date: 2017-03-22
QINGDAO UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the three-dimensional network structure of waste rubber powder, the modified rubber powder has poor compatibility with other rubber blends and uneven dispersion, which will lead to a decrease in the physical and mechanical properties and processing performance of the product.

Method used

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  • Method for preparing rubber powder/natural rubber liquid-phase mixed compound rubber
  • Method for preparing rubber powder/natural rubber liquid-phase mixed compound rubber

Examples

Experimental program
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Effect test

Embodiment 1

[0040] This embodiment provides a method for preparing rubber powder / natural rubber liquid phase mixing composite rubber, comprising the following steps:

[0041] (1) 80 mesh 10 parts by weight of rubber powder, 88 parts by weight of water, 1.5 parts by weight of polyvinyl alcohol and 0.5 parts by weight of N~phenyl~β~naphthylamine, at room temperature, under the condition of 500 rpm Mix and stir for 30 minutes to obtain a stable rubber powder dispersion;

[0042] (2) the latex of the solid content 40% of 100 parts by weight, the water of 99 parts by weight, the microbial protease of 0.5 parts by weight and the stabilizer of 0.5 parts by weight were mixed and stirred for 10 minutes at room temperature, under the condition of 50 rev / min, prepared pretreated latex;

[0043] (3) Add the rubber powder dispersion and pretreated latex into the mixer in a ratio of 2:5, mix for 20 minutes at 1000 rpm and stir, then add 2 parts by weight of 2% acetic acid and stir until the mixed gel ...

Embodiment 2

[0046] (1) 120 orders of 10 parts by weight of rubber powder, 88 parts by weight of water, 1.5 parts by weight of polyvinyl alcohol and 0.5 parts by weight of antioxidant 1010 were mixed and stirred for 40 minutes at room temperature and at 500 rpm, Obtain a stable rubber powder dispersion;

[0047] (2) the latex of 40% solid content of 100 weight parts, the water of 99 weight parts, the microbial protease of 0.5 weight part and the stabilizing agent of 0.5 weight part were mixed and stirred for 20 minutes under the conditions of room temperature and 50 rev / min, and prepared pretreated latex;

[0048] (3) Add the rubber powder dispersion and the pretreated latex into the mixer according to the ratio of 2:5, mix and stir for 20 minutes under the condition of 1000 rpm, add 0.5 parts by weight of 2% acetic acid and stir until the mixed gel is fully solidified;

[0049] (4) washing the solidified mixed rubber, extruding to remove water, and drying to obtain rubber powder / natural ...

Embodiment 3

[0051] This embodiment provides a method for preparing rubber powder / natural rubber liquid phase mixing composite rubber, comprising the following steps:

[0052](1) 200 mesh 10 parts by weight of rubber powder, 88 parts by weight of water, 1.5 parts by weight of polyvinyl alcohol and 0.5 parts by weight of N~phenyl~β~naphthylamine, at room temperature, under the condition of 500 rpm Mix and stir for 30 minutes to obtain a stable rubber powder dispersion;

[0053] (2) the latex of the solid content 40% of 100 parts by weight, the water of 99 parts by weight, the microbial protease of 0.5 parts by weight and the stabilizer of 0.5 parts by weight were mixed and stirred for 10 minutes at room temperature, under the condition of 50 rev / min, prepared pretreated latex;

[0054] (3) Add the rubber powder dispersion and pretreated latex into the mixer in a ratio of 3:5, mix for 20 minutes at 1000 rpm and stir, then add 2 parts by weight of 2% acetic acid and stir until the mixed gel ...

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Abstract

The invention relates to a method for preparing rubber powder / natural rubber liquid-phase mixed compound rubber. The method includes steps of (1), mixing and stirring rubber powder (with the size of 30-200 meshes), water, anti-sedimentation agents and antioxidants to obtain stable rubber powder dispersion; (2), mixing and stirring latex with the solid content of 20%-70%, water, microorganism protease and stabilizers to obtain pretreated latex; (3), adding the rubber powder dispersion and the pretreated latex into a stirring machine according to a proportion of 1:10-1:0.1, mixing and stirring the rubber powder dispersion and the pretreated latex, adding coagulating agents into the rubber powder dispersion and the pretreated latex, stirring the coagulating agents, the rubber power dispersion and the pretreated latex until mixed rubber is sufficiently coagulated; (4), washing the coagulated mixed rubber, squeezing and dewatering the mixed rubber and drying the mixed rubber to obtain the rubber powder / natural rubber liquid-phase mixed compound rubber. The method has the advantages that the dispersion uniformity of the rubber powder in natural rubber can be improved, destruction of molecular chains of the natural rubber when the rubber powder and the natural rubber are mixed with each other under warming mixing conditions can be reduced, energy consumption can be reduced, and the rubber powder / natural rubber liquid-phase mixed compound rubber which is a composite material prepared by the method is excellent in physical and mechanical property.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to a method for preparing rubber powder / natural rubber composite glue by liquid phase mixing. Background technique [0002] In recent years, with the increasing mileage of highways and the number of motor vehicles in my country, the production of waste rubber (tires) has grown rapidly at an average annual rate of 10% to 30%. By 2015, my country's waste tire production will reach about 300 million. If a large amount of waste rubber (tyres) is not utilized, it will not only breed bacteria, occupy land, but also cause serious fire hazards. Therefore, how to safely and environmentally friendly utilize these large amounts of waste tire resources has become a very urgent task. [0003] At present, the utilization of recycled rubber in the industry is mainly divided into three directions: the preparation of recycled rubber, the surface modification of rubber powder, and the conversion of ...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L21/00C08L29/04C08L67/04C08L33/02C08K13/02C08K5/18C08K5/134C08K5/526C08K3/34C08K3/36C08K3/04C08C1/15
CPCC08C1/15C08L7/00C08L21/00C08L2205/03C08L29/04C08K13/02C08K5/18C08K5/1345C08K3/346C08L67/04C08K3/04C08L33/02C08K3/36
Inventor 王洪振赵华强卢娜辛振祥胡恩波
Owner QINGDAO UNIV OF SCI & TECH
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