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A kind of halogenated rubber blend and preparation method thereof

A halogenated rubber and admixture technology, applied in the rubber field, can solve the problems of reducing rubber strength, rubber stopper pollution, slowing down the rubber vulcanization speed, etc., and achieve the effect of preventing aging and discoloration, preventing degradation and discoloration, and preventing discoloration and aging.

Active Publication Date: 2018-03-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ESBO is an organic substance with a low molecular weight. When added to halogenated rubber, it is very easy to migrate to the surface of the rubber. For the application of manufacturing medical stoppers, it is very easy to cause rubber stopper pollution and a series of problems caused by the migration of small molecular organic substances. follow-up questions
In addition, because ESBO is a low molecular weight liquid, adding it to rubber will significantly reduce the strength of rubber
Cast is also a low-weight organic compound, which will cause pollution when added to rubber to make plugs, and calcium stearate is also a vulcanization retarder, which will significantly slow down the vulcanization speed of rubber when added to rubber

Method used

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  • A kind of halogenated rubber blend and preparation method thereof
  • A kind of halogenated rubber blend and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-2

[0023] Example 1-2: In this experiment, butyl rubber and isobutylene-p-methylstyrene copolymer were dissolved to form 400 g of 15% by weight hexane solution, and then 2.4 g of liquid bromine was added for reaction, and then a small amount of The aqueous solution of sodium hydroxide is neutralized, and is washed with distilled water to pH7~8 respectively. Add the suspension of 0.6gMgAl-LDHs and 30g hexane. Then stir separately for 5min, then use steam to remove hexane, then use an open mill to squeeze and dehydrate, and dry to a volatile matter of less than 0.7% by weight to obtain a close blend of brominated butyl and MgAl-LDHs or brominated isobutylene - Intimate blends of p-methylstyrene copolymers with MgAl-LDHs.

[0024] Comparative samples 1-3 are commercially available Exxon2211 rubber, Lanxess2030 rubber, and BBk232 rubber; the additives (or stabilizers) are calcium stearate and epoxy soybean oil, and the addition amount is the same. A rubber without additives (MgAl-LD...

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PUM

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Abstract

The invention discloses a halogenated rubber blend. The halogenated rubber blend comprises halogenated rubber and below 4.5% of a hydrotalcite intercalation material stabilizer. The stabilizer added in a subsequent processing process can effectively prevent degradation and color variation of rubber, has little influence on subsequent vulcanization performance, and is a stable and effective additive. The stabilizer added in the invention can prevent color variation ageing of the rubber, and is a brand new halogenated rubber stabilizing manner, and has a wide application prospect.

Description

technical field [0001] The invention relates to the field of rubber, in particular to a halogenated rubber blend. The present invention also relates to a process for the preparation of the above halogenated rubber blends. Background technique [0002] Halogenated rubber (such as halogenated butyl rubber and brominated isobutylene p-methylstyrene copolymer) is an important modified product of rubber, which is usually prepared according to the following procedure: dissolving rubber in a solvent (such as saturated hydrocarbon) to form A certain concentration of butyl rubber solution, and then react with a halogenating agent (such as liquid bromine or chlorine gas) under the condition of sufficient mixing, then add lye to neutralize, add a stabilizer, steam condense, extrude, dehydrate, expand and dry, and pack into blocks . Halogenated rubber (such as halogenated butyl rubber or brominated isobutylene-p-methylstyrene copolymer) in addition to retaining the original excellent ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/28C08K3/22
CPCC08K3/26C08K7/00C08L23/283
Inventor 钟林徐宏德包巧云孙秀霞
Owner CHINA PETROLEUM & CHEM CORP