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Preparation method of styrene butadiene rubber grafted isoprene polymer powder

A technology of isoprene and styrene-butadiene rubber, which is applied in the field of styrene-butadiene rubber grafted isoprene polymer powder and its preparation, can solve the problems of complex processing, difficult control, and no copolymer powdering, etc. To achieve the effect of simple process, good product quality and better compatibility

Active Publication Date: 2012-12-12
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN101463110A introduces a butadiene-isoprene-styrene terpolymer, which only involves copolymerization, does not graft styrene-butadiene latex, and does not involve the powdering of the copolymer
CN97191939.9 The rubber composition and the pneumatic tire using the composition add white carbon black for reinforcement during rubber processing, which makes the processing process complicated and difficult to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 100 parts of water, 100 parts of styrene-butadiene latex (butadiene, styrene mass ratio is 68 / 32), 7 parts of disproportionated rosin soap, 0.35 part of tertiary dodecyl mercaptan in 10L polymerization kettle, after replacing with nitrogen , add 25 parts of isoprene, stir and heat. When the temperature of the polymerization tank reaches 60°C, add 0.5 part of sodium azoamino acid sodium, stir for 0.8h, and then react at 60°C for 7 hours. The monomer conversion rate is controlled at 85%, adding 0.15 parts of sodium dimethyl dithiocarbamate to obtain styrene-butadiene grafted latex. Add 40 parts of water, 100 parts of grafted latex, and 3 parts of white carbon black into the coagulation kettle. At the coagulation temperature of 65°C, adjust the pH value of the system to 10 for coagulation, stir at 80°C for 30 minutes for aging, and then wash and dehydrate. Dry to obtain the product of the present invention. The structure and properties of the sample were tested by cla...

Embodiment 2

[0031]Add 120 parts of water in a 10L polymerization kettle, 100 parts of styrene-butadiene latex (butadiene, styrene ratio 60 / 40), 5 parts of disproportionated rosin soap, 0.30 part of tert-dodecyl mercaptan, replace with nitrogen, add 30 parts parts isoprene. Stir and heat. When the temperature of the polymerization kettle reaches 40°C, add 0.8 parts of sodium azoamino acid, stir for 0.8 hours, and react at 40°C for 8 hours. The monomer conversion rate is controlled at 65%, and add 0.12 parts of dimethyl dithio Sodium carbamate was used to prepare styrene-butadiene grafted latex. Add 30 parts of water, 100 parts of grafted latex, and 4 parts of white carbon black into the coagulation kettle. At the coagulation temperature of 80°C, adjust the pH value of the system to 12 for coagulation, stir at 70°C for 20 minutes for aging, and then wash and dehydrate. Dry to obtain the product of the present invention. The structure and properties of the sample were tested by classical m...

Embodiment 3

[0035] Add 70 parts of water, 100 parts of styrene-butadiene latex, 5.5 parts of disproportionated rosin soap, 0.28 parts of tertiary dodecyl mercaptan into a 10L polymerization kettle, replace with nitrogen, and add 35 parts of isoprene. Stir and heat. When the temperature of the polymerization kettle reaches 50°C, add 0.4 parts of sodium azoamino acid, stir for 0.8 hours, and react at 50°C for 6 hours. The monomer conversion rate is controlled at 75%, and add 0.15 parts of dimethyl dithio Sodium carbamate was used to prepare styrene-butadiene grafted latex. Add 80 parts of water, 100 parts of grafted latex, and 3 parts of white carbon black into the coagulation kettle. At the coagulation temperature of 60°C, adjust the pH value of the system to 8 for coagulation, stir at 90°C for 20 minutes for aging, and then wash and dehydrate. Dry to obtain the product of the present invention. The structure and properties of the sample were tested by classical methods, the results are a...

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Abstract

The invention relates to a preparation method of styrene butadiene rubber grafted isoprene polymer powder, comprising the following steps: successively adding water, butylbenzene latex, emulsifier, molecular weight modifier and isoprene monomer in a polymerization vessel, heating with stirring, adding an initiator when the temperature reaches 30-60 DEG C and stirring for 0.8-1 h, carrying out reaction at the temperature of 30-60 DEG C for 5-8 h, and adding a terminator to obtain graft latex; and then adding coagulating agent for coacervation and curing, and carrying out washing, dehydration and drying to obtain the polymer powder. The prepared polymer powder has the particle size of 0.40-1.00 mm, the bulk density of 0.25-0.40 g / cm<3>, the ash content of 0.05-0.12 %, the volatile matter of0.15-0.40 %, the content of white carbon black of 20-30 %, and the content of isoprene of 20-50 %. The polymer powder disclosed in the invention is a powdered styrene butadiene rubber with good comprehensive properties.

Description

technical field [0001] The invention belongs to the technical field of polymer material synthesis and preparation, and relates to the field of synthetic rubber, in particular to a kind of styrene-butadiene rubber grafted isoprene polymer powder and a preparation method thereof. Background technique [0002] Powdered rubber has been used more and more due to its many advantages such as short mixing time, low power consumption, low debinding temperature and good final dispersion; powdered rubber can also be transported in pipelines and automatically weighed like carbon black and other fillers. It is helpful to improve the automation of factory mixing production. In terms of application: powdered rubber can not only prepare rubber products, but also be used as a modifier, which is widely used in the field of adhesives and polymers. However, isoprene resources in the co-production of C5 in ethylene plants are abundant, and are currently used as low-cost fuels. The comprehensive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L51/04C08K3/36C08F279/02C08F236/08C08F2/24C08C1/15
Inventor 梁滔魏绪玲郑聚成龚光碧艾纯金朱晶郑红兵董万卓赵洪国桂强马朋高
Owner PETROCHINA CO LTD