Preparation method for high performance butadiene-styrene-isoprene powder polymer

A technology of powder polymer and isoprene, which is applied in the field of preparation of high-performance butadiene-styrene-isoprene powder polymer, can solve the problem of deactivation of the surface of carbon nanotubes and achieve the effect of powdering Good, simple method, good effect

Active Publication Date: 2013-06-19
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method will deactivate part of the carbon nanotube surface

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] ① Dispersion of carbon nanotubes: Add 100 parts of carbon nanotubes into the high-speed disperser, add 500 parts of water, start stirring for 20 minutes, so that the carbon nanotubes are evenly dispersed. ②Preparation of grafted latex: Add 50 parts of water, 100 parts of styrene-butadiene latex, 2 parts of emulsifier, and 0.1 part of molecular weight regulator in the polymerization kettle in sequence. After replacing with nitrogen, add 35 parts of isoprene monomer and stir , heating, when the temperature of the polymerization kettle reaches 30°C, add 0.1 part of initiator, stir for 0.8h, then react for 5 hours at 30°C polymerization temperature, add 0.1 part of terminator to obtain grafted latex. ③Agglomeration into powder: Take 100 parts of grafted latex and add it to the coagulation kettle, add 20 parts of medium water, add 15 parts of dispersed carbon nanotubes, stir and heat, and at the coagulation temperature of 20°C, add 2 parts of release agent, 3 parts of Floccu...

Embodiment 2

[0040] ① Dispersion of carbon nanotubes: Add 100 parts of carbon nanotubes into the high-speed disperser, add 1000 parts of water, start stirring for 30 minutes, so that the carbon nanotubes are evenly dispersed. ②Preparation of grafted latex: Add 150 parts of water, 100 parts of styrene-butadiene latex, 8 parts of emulsifier, and 0.6 parts of molecular weight regulator in the polymerization kettle in sequence. After replacing with nitrogen, add 20 parts of isoprene monomer and stir , heating, when the temperature of the polymerization kettle reaches 40°C, add 0.3 part of initiator, stir for 1 hour, then react at 40°C for 8 hours, add 0.5 part of terminator to obtain grafted latex. ③Agglomeration into powder: Take 100 parts of grafted latex and add it to the coagulation kettle, add 80 parts of medium water, add 50 parts of dispersed carbon nanotubes, stir and heat, and at the coagulation temperature of 80°C, add 6 parts of release agent and 10 parts of Flocculant, 10 parts of ...

Embodiment 3

[0044] ① Dispersion of carbon nanotubes: Add 100 parts of carbon nanotubes into the high-speed disperser, add 2000 parts of water, start stirring for 40 minutes, so that the carbon nanotubes are evenly dispersed. ②Preparation of grafted latex: Add 100 parts of water, 100 parts of styrene-butadiene latex, 10 parts of emulsifier, and 1.2 parts of molecular weight regulator in the polymerization kettle in sequence. After replacing with nitrogen, add 40 parts of isoprene monomer and stir , heating, when the temperature of the polymerization kettle reaches 60°C, add 0.4 parts of initiator, stir for 0.9h, then react at 60°C for 6 hours, and add 0.3 parts of terminator to obtain grafted latex. ③Agglomeration into powder: Take 100 parts of grafted latex and add it to the coagulation kettle, add 80 parts of medium water, add 40 parts of dispersed carbon nanotubes, stir and heat, at the coagulation temperature of 60°C, add 8 parts of release agent, 15 parts of Flocculant, 15 parts of co...

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Abstract

The invention adopts a direct coagulation method for preparation of a high performance butadiene-styrene-isoprene powder polymer. The method comprises the following steps: dispersion of a carbon nanotube: a step of adding the carbon nanotube and water into a high-speed disperser and carrying out stirring to allow the carbon nanotube to be uniformly dispersed; preparation of graft latex: a step of successively adding water, styrene-butadiene latex, an emulsifier and a molecular weight regulator into a polymerization kettle, carrying out nitrogen displacement, adding isoprene, carrying out stirring and heating, adding an initiator and carrying out polymerization to prepare the graft latex; and coagulation for formation of powder: a step of successively adding the graft latex, water and the carbon nanotube into a coagulation kettle, carrying out stirring and heating, adding a release agent, a flocculating agent and a coagulating agent and carrying out curing, washing, dehydration and drying to obtain the powder polymer. The prepared powder polymer has the following performances: a powder particle size of 0.5 to 0.8 mm; isoprene content in PSBIR of 20 to 40%; Mooney viscosity ML(1+4)<100 DEG C> of 50 to 70; 300% stress at definite elongation of 18 to 25 MPa; tensile strength of no less than 27.0 MPa; elongation at break of no less than 560%; antistatic resistance of 106 to 109 omega; and electrization voltage of less than 100V.

Description

technical field [0001] The invention relates to a method for preparing synthetic rubber, in particular to a method for preparing a high-performance butadiene-styrene-isoprene powder polymer (PSBIR). Background technique [0002] Because of its unique structure and excellent performance, carbon nanotubes have been one of the hotspots in the field of nanomaterials research. In addition to excellent mechanical and thermal properties, carbon nanotubes also have unique and excellent electrical properties. [0003] As a polymer material with unique properties, rubber is widely used in various fields such as automobiles, chemicals, electronics, machinery manufacturing, and aerospace. In the traditional rubber industry, carbon black is considered to be the most effective modified reinforcing agent. For products requiring high conductivity, it is usually prepared by adding a large amount of conductive carbon black to rubber. Carbon nanotubes and carbon Black is also a carbon materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/04C08K3/04C08F279/02C08F236/08C08F2/24C08C1/15
Inventor 魏绪玲梁滔刘宝勇付含琦郑聚成龚光碧魏玉丽徐典宏朱晶艾纯金
Owner PETROCHINA CO LTD
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