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Method for vulcanization modification of natural rubber by change of cross-linking agent ratio, and product obtained by the method

A technology of natural rubber and crosslinking agent, which is applied in the field of preparation of vulcanization modification of natural rubber, can solve problems such as complex experiments, and achieve the effects of good performance, easy operation and simple method

Active Publication Date: 2012-02-22
睢宁和信塑业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the theoretical research on vulcanized rubber at home and abroad has achieved certain results, but most of the experiments are relatively complicated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Aromatic hydrocarbon oil pretreatment: Add a certain amount of aromatic hydrocarbon oil into a three-necked flask, under the condition of nitrogen protection, heat the oil bath to 160°C, stir magnetically, and keep it constant for two hours at this temperature, so that the small molecules in the aromatic hydrocarbon oil are fully was excluded, and then cooled to room temperature under nitrogen protection.

[0019] (2) The mixing of natural rubber is carried out according to the following steps; adjust the distance between the two rollers of the open mill to about 0.5mm, first use 75g of natural rubber to fully wash the rollers of the open mill, and then add the material according to the setting after 5 minutes Add in order. The order of feeding is: natural rubber, zinc oxide, stearic acid, NOBS, paraffin, anti-aging agent, carbon black, aromatic oil, sulfur.

[0020] Natural rubber 100g, aromatic oil 5g, carbon black 45g, zinc oxide 5g, stearic acid 3g, anti-aging ...

Embodiment 2

[0025] (1) Aromatic hydrocarbon oil pretreatment: Add a certain amount of aromatic hydrocarbon oil into a three-necked flask, under the condition of nitrogen protection, heat the oil bath to 160°C, stir magnetically, and keep it constant for two hours at this temperature, so that the small molecules in the aromatic hydrocarbon oil are fully was excluded, and then cooled to room temperature under nitrogen protection.

[0026] (2) The mixing of natural rubber is carried out according to the following steps; adjust the distance between the two rollers of the open mill to about 0.5mm, first use about 78g of natural rubber to fully wash the rollers of the open mill, and after 5 minutes follow the set The order of feeding is added sequentially. The order of feeding is: natural rubber, zinc oxide, stearic acid, NOBS, paraffin, anti-aging agent, carbon black, aromatic oil, sulfur.

[0027] Natural rubber 100g, aromatic oil 5g, carbon black 45g, zinc oxide 5g, stearic acid 3g, anti-ag...

Embodiment 3

[0032] (1) Aromatic hydrocarbon oil pretreatment: Add a certain amount of aromatic hydrocarbon oil into a three-necked flask, under the condition of nitrogen protection, heat the oil bath to 160°C, stir magnetically, and keep it constant for two hours at this temperature, so that the small molecules in the aromatic hydrocarbon oil are fully was excluded, and then cooled to room temperature under nitrogen protection.

[0033] (2) The mixing of natural rubber is carried out according to the following steps: adjust the distance between the two rollers of the open mill to about 0.5mm, first use 77g of natural rubber to fully wash the rollers of the open mill, and then add the material according to the setting after 5 minutes Add in order. The order of feeding is: natural rubber, zinc oxide, stearic acid, NOBS, paraffin, anti-aging agent, carbon black, aromatic oil, sulfur.

[0034] Natural rubber 100g, aromatic oil 5g, carbon black 45g, zinc oxide 5g, stearic acid 3g, anti-aging ...

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PUM

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Abstract

The invention discloses a method for vulcanization modification of a natural rubber by change of a cross-linking agent ratio, and a product obtained by the method. The method is a simple method for improving vulcanized rubber performances. The method overcomes the defects of the prior art. The method realizes change of crosslinking density only through change of a ratio of sulfur to N-oxydiethylene-2-benzothiazolesulfenamide in a cross-linking agent so that mechanical properties and swellbility of a vulcanized rubber are changed. Therefore, through the method, a vulcanized rubber having good solvent resistance can be obtained. The method is simple and is easy for operation.

Description

technical field [0001] The invention relates to a preparation method of vulcanization modification of natural rubber and its product, more specifically, relates to a simple preparation method of modifying natural rubber by changing the proportion of crosslinking agent and its product. Background technique [0002] Natural rubber is a self-reinforcing rubber with high elasticity and mechanical strength. However, due to the poor compatibility of natural rubber and polar polymers, it is easy to swell in non-polar solvents, oil resistance and organic solvent resistance are poor, and the molecular structure contains unsaturated double bonds, which are prone to thermal oxygen aging, ozone Aging and photo-oxidative aging, etc., thus restricting the use of natural rubber. Over the years, people have been trying to find a rubber with better mechanical properties, and found that cross-linking natural rubber can obtain rubber with better mechanical properties, that is, vulcanized rubb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08K13/02C08K5/01C08K3/04C08K3/22C08K5/09C08K5/47C08K3/06B29C35/02
Inventor 侯信程高平张喆汪洪
Owner 睢宁和信塑业有限公司
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