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Predispersions, process for their preparation, compositions therefor, process for the preparation of such compositions

A dispersion and mixture technology, applied in the field of pre-dispersion, preparation of the pre-dispersion, composition using the pre-dispersion and preparation of the composition, can solve the problems of not being able to provide compression deformation properties, anti-aging properties, etc.

Inactive Publication Date: 2004-08-25
维平·夏尔马
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, studies have shown that this existing polymeric mixture does not provide the good compression set properties or good anti-aging properties needed to make predispersants for rubber chemicals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0099] 2.5 kg of ethylene vinyl acetate (Grade 2825 provided by NATIONAL ORGANIC CHEMICALINDUSTRIES LTD., MUMBAI, India) containing 28% vinyl acetate and 5 kg of EPDM rubber (produced by DSMN.V., Netherlands) The supplied KELTAN GRADE No. 4802) was melt-mixed in a kneader (provided by EXTRUSION SYSTEMS, New Delhi, India). The polymer is melt-mixed in the kneader at 90°C for approximately 18-20 minutes. The resulting 1.5 kg polymer mixture was added to another mixer / kneader and 10 kg of sulfur and 1 kg of polyisobutylene (manufactured and manufactured by Gujarat Petrosynthesis Ltd.) were added to the mixer / kneader. Sold by Indian Petrochemicals Corporation Ltd., Vadodara, India, grade PV10). The sulfur complexing agent is milled in a nitrogen blanket to ensure that its particle size is 500-750 mesh before being added to the polymer mixture. The finally obtained mixture is melt-mixed in a kneader. Care must be taken to ensure that the treatment temperature does not exceed 56°C to pr...

example 2

[0101] Combine 0.5 kg of ethylene vinyl acetate (Grade 2825 provided by NATIONAL ORGANIC CHEMICALINDUSTRIES LTD., MUMBAI, India) with 28% vinyl acetate and 1 kg of PIB (KELTAN provided by DSM NV, Netherlands). GRADE No. 4802) was melt-mixed in a kneader (provided by EXTRUSION SYSTEMS, New Delhi, India). To the mixer / kneader were added 10 kg of sulfur and 1 kg of polyisobutylene (manufactured by Gujarat Petrosynthesis Ltd. and sold by Indian Petrochemicals Corporation Ltd., Vadodara, India, grade PV10).

[0102] The above-mentioned sulfur complexing agent has been ground in a nitrogen blanket to ensure that its particle size is 500-750 mesh. The mixture is melt-mixed in a kneader.

[0103] Care must be taken to ensure that the treatment temperature does not exceed 56°C to prevent harmful effects on the characteristics of the final pre-dispersion system.

[0104] The resulting rubber mud is fed to a pelletizer with refrigeration supply. In this way, particles that can flow freely wi...

example 3

[0106] 2.5 kg of vinyl vinyl acetate (EVA) containing 40% vinyl acetate (manufactured by Sumitomo CHEMICAL CO. Ltd., Osaka, Japan, and supplied by its agency M / S.Kemeff Value Additives in Mumbai, India) Grade Sumitate RB 11) and 5 kg of EPDM rubber (KELTAN GRADE No.4802 provided by DSM NV in the Netherlands) were melt-mixed in a kneader (provided by EXTRUSION SYSTEMS in New Delhi, India).

[0107] The polymer is melt-mixed in the kneader at 90°C for about 18-20 minutes to obtain a preliminary polymer mixture. The 1.5 kg polymer mixture obtained above was added to another mixer / kneader and 10 kg of sulfur and 1 kg of PIB (manufactured by Gujarat Petrosynthesis Ltd.) were added to the mixer / kneader. And the grade PV10 sold by Indian Petrochemicals Corporation Ltd., Vadodara, India. The above-mentioned sulfur is ground in a nitrogen blanket to ensure that its particle size is 500-750 mesh. The melt mixing reaction is carried out in a kneader.

[0108] Care must be taken to ensure tha...

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Abstract

The present invention relates to predispersions of rubber chemicals and to a process for the preparation thereof. The present invention also relates to a novel polymeric composition for dispersing a rubber chemical and to a process for the preparation of said composition.

Description

Invention field [0001] The invention relates to a pre-dispersion system of rubber additives and a method for preparing such rubber additives. The present invention also relates to a composition for dispersing rubber additives and a method for preparing the composition. Background of the invention [0002] It is well known that vulcanizing rubber is a step to enhance rubber characteristics such as robustness. In the rubber vulcanization process, a large number of rubber additives are used. These additives include: vulcanizing agents, such as sulfur; catalysts, such as ZnO; accelerators; retarders, etc. All these additives are in powder form. [0003] A method of vulcanizing diene rubber by heating together with sulfur and a vulcanization accelerator has been available for many years. In this way, a vulcanized rubber with certain physical properties can be obtained, such as higher tensile strength, elasticity and fatigue resistance. However, it can be said that this vulcanized rubb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/22
CPCC08J3/226C08J2421/00C08J2423/00C08J2321/00C08J3/22
Inventor 维平·夏尔马
Owner 维平·夏尔马
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