Regeneration method of waste elastic body

A kind of elastic body and elastic technology, which is applied in the field of regeneration of old discarded elastic body, can solve the problems of poor plasticization degree, non-compliance with environmental protection, poor quality, etc.

Inactive Publication Date: 2006-09-13
陈民铎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Although the physical and mechanical properties of the reclaimed rubber produced according to the current reclaimed rubber production method are still good, a large amount of aromatic hydrocarbon materials with odorous and carcinogenic properties such as benzo(a)pyrene should be used in the softener formula, such as: Coal tar, pine tar, aromatic oil, etc., desulfurization active agents also mainly use a few kinds of materials that have bad smell and will produce toxic and polluting hydrogen sulfide and other gases during use (this is because these desulfurization active agents must be at pH less than 7 Only when there is desulfurization activity), such as: tar-like material containing 2,2-bis(6-tert-butyl-p-methylphenol) disulfide (abbreviated as 420), resulting in the product material having an irremovable stench! Especially in the production sites where reclaimed rubber is produced by high temperature regeneration method and where reclaimed rubber is used, the smell is even worse!
[0004] 2. In order to avoid severe air pollution when the elastomer is regenerated at high temperature, CN1087099A, CN1127271.A and other patents proposed regeneration schemes at room temperature, but after practical application of these regeneration schemes at room temperature, it was found that the obtained products were plasticized The degree is poor, and the powder particles are too coarse, and its physical properties and economical properties are not better than reclaimed rubber in downstream applications; in

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Take by weight the old discarded elastic body particle size is 100 parts of radial tire granules of 20~30 purpose, take by weighing by powder class auxiliary material: "white carbon black cement (new generation in water phase, water content 80%, take dry basis Total,) 5 parts, alkali mud ((discharged from soda ash plant, PH>9, water content 30%, on a dry basis) 10 parts, gypsum (discharged from citric acid plant, PH<4, water content 30%) with dry basis) 10 parts", and anti-friction lubricating materials: "0.07 parts of sodium methylene bismethylnaphthalene sulfonate, methyl silicone oil or / and bis-[3-triethoxysilylpropyl]tetrasulfide 25.14 parts of regenerative aid group consisting of 0.07 parts of substance; the pH of this kind of regenerative aid group is 7-9.

[0091]Put the above-mentioned materials in a closed mixing tank and mix them evenly, and then introduce them into a rubber room-temperature ultra-fine pulverizer through a screw conveying pipe for pulverizatio...

Embodiment 2

[0100] Weigh respectively by weight 100 parts of used waste elastomer particle size of 20 to 30 mesh tire rubber particles and 25.5 parts of "regeneration aid group 2" composed of the following materials. The "regeneration aid group 2" has a particle size of 200 Purpose powder auxiliary material-white pine sawdust (pH=5~6 of this material, water content is about 70%, on a dry basis) 25 parts, and anti-friction lubricant class material-polyethylene glycol octylphenyl 0.5 part" Combined, the above materials are first placed in a closed mixer and mixed evenly, and then introduced into a vulcanized rubber room temperature superfine pulverizer through a screw conveying pipe for pulverization, and after screening, 120 parts of a masterbatch product finer than or equal to 80 meshes are obtained. , use the suction pipe to lead into the storage bin, where the finer than or equal to 100 mesh

[0101] The material accounts for more than 85%; the material whose particle size is coarser th...

Embodiment 3

[0106] The combination principle of the powder excipients in the regenerative aid group with the chewing and dissolving function, through the proper combination of materials, the pH of the powder excipients obtained after mixing is controlled within the range with pH buffering properties, and has a surface hardness and roughness.

[0107] As shown in Example 1, the regeneration operation process of the elastomer can be used to obtain the powder auxiliary materials in the regeneration aid group that has a decomposing effect on the polymer hydrocarbon chain, and then 5 examples of matching that meet the above combination principles, Listed in Table 2.

[0108] Through a large number of experiments and microscopic observations, it is found that the powder auxiliary materials are blended together, and after phase changes such as coating, heating, dehydration and crystallization, the surface becomes rough and hard, and the pH is in the range of 5-9 and has pH buffering properties. ...

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Abstract

A process for regenerating the used or rejected elastomer features that the non-odor softening agent prepared from the kernel of plant fruit, oil-containing decolored mud and/or frequently used softener, non-odor activating agent, anti-oxidizing-antiageing agent, adsorbent, industrial refuse, the powder of bone, shell, or straw, and/or reinforcing filler are used to treat said used or rejected elastomer to obtain fine (80 meshes) powder, which can be used as the filler of rubber or plastics.

Description

technical field [0001] The present invention proposes a new regeneration method for old discarded elastomers, which combines harmlessly with regeneration aids and compounding agents, and uses them to mix and regenerate old discarded elastomer blocks, crumbs, granules, and powders. crushing, separation, heat, kneading, etc., to produce a plastic that has the odor of no more than new elastomers at room temperature and high temperature, and has the advantages of no dust flying, which can be used as raw materials for rubber and plastic products. Rubber powder or fine rubber powder masterbatch or masterbatch, the present invention mainly relates to the recycling of used elastomers and solid waste, and belongs to the technical category of waste recycling. Background technique [0002] The recycling of old and discarded elastomeric solid waste is an indispensable industrial category for my country, a large developing country. Pollution and so on have played a positive role, especia...

Claims

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Application Information

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IPC IPC(8): B29B17/00C08J11/00
CPCY02W30/62
Inventor 陈民铎
Owner 陈民铎
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