A kind of method preventing the cold flow of butadiene rubber

A technology of butadiene rubber and cold flow, which is applied in the fields of polymer chemical industry, rubber storage and transportation, can solve the problems of changing butadiene rubber, and achieve the effect of preventing cold flow and facilitating transportation and storage

Active Publication Date: 2018-05-04
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The prior art either improves the cold flow properties of butadiene rubber by changing the structure of butadiene rubber, or improves the cold flow properties of butadiene rubber by blending with resins, but these methods will change the excellent properties of butadiene rubber itself, such as high resilience

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Spread a thin layer of Dushanzi butadiene rubber BR9000 fragments containing 100 parts of wet coagulation on the conveyor belt, dissolve 0.5 parts of pivalate pivalate into 5 parts of methyl ethyl ketone, and then use spray equipment to spray evenly Put it on the butadiene rubber fragments, stop for ten minutes, enter the briquetting machine for briquetting, and then enter the next step of packaging and delivery process.

Embodiment 2

[0025] Spread a thin layer of Dushanzi butadiene rubber BR9000 fragments containing 100 parts of wet coagulation on the conveyor belt, dissolve 0.1 part of pivalate pivalate into 3 parts of methyl ethyl ketone, and then use spray equipment to spray evenly Put it on the butadiene rubber fragments, stop for ten minutes, enter the briquetting machine for briquetting, and then enter the next step of packaging and delivery process.

Embodiment 3

[0027] Spread a thin layer of Dushanzi butadiene rubber BR9000 fragments containing 100 parts of wet coagulation on the conveyor belt, dissolve 1 part of pivalate pivalate into 4 parts of methyl ethyl ketone, and then use spray equipment to spray evenly Put it on the butadiene rubber fragments, stop for ten minutes, enter the briquetting machine for briquetting, and then enter the next step of packaging and delivery process.

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PUM

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Abstract

The invention provides a method for preventing the cold flow of butadiene rubber, which is a method for improving the cold flow of butadiene rubber, mainly using an anti-cold flow agent to make the butadiene rubber slightly cross-linked, The formation of microgel in a small area makes the overall fluidity of butadiene rubber worse, which can greatly reduce the cold flow property, and can reduce the cold flow rate to less than 25 mg per minute.

Description

technical field [0001] The invention relates to a method for preventing cold flow of butadiene rubber, which belongs to the field of polymer chemical industry, and more specifically belongs to the field of rubber storage and transportation. Background technique [0002] Because the molecular chain of butadiene rubber is very flexible, it has good fluidity and good low temperature resistance. Therefore, at room temperature, the phenomenon of butadiene rubber flowing to the bottom of the surrounding area under the influence of its own weight is cold flow, which is characterized by a small deformation rate and a long time. The cold flow of rubber comes from the small intermolecular force, good flexibility of molecular chains, and no branching, cross-linking and other factors that hinder the relative displacement of molecular chains. [0003] The cold flow of butadiene rubber will change the shape of the butadiene rubber block, and sometimes burst the packaging bag, causing the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08C3/00
Inventor 吴宇赵洪国樊洁何连成杨珊珊李波胡海华宋中勤孟令坤李新元
Owner PETROCHINA CO LTD
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