CN101747528A - Mechanochemical method for preparing high-performance regenerated rubber - Google Patents
Mechanochemical method for preparing high-performance regenerated rubber Download PDFInfo
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- CN101747528A CN101747528A CN200810236016A CN200810236016A CN101747528A CN 101747528 A CN101747528 A CN 101747528A CN 200810236016 A CN200810236016 A CN 200810236016A CN 200810236016 A CN200810236016 A CN 200810236016A CN 101747528 A CN101747528 A CN 101747528A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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Abstract
The invention relates to a mechanochemical method for preparing high-performance regenerated rubber and a process thereof, aiming at improving the quality of the regenerated rubber. The process includes: under normal pressure and temperature, a crosslink bond in the scrap rubber is selectively cut off by utilizing bond energy difference between the crosslink bond of the scrap rubber and a major bond, a molecule major bond is retained, and desulfuration is carried out by utilizing solid-phase grinding three-dimensional cutting. The composition formula (mass percent) of raw materials is as follows: the proportion of rubber powder prepared by the scrap rubber, RX-80 rubber softener, plasticizer and 4,6- di-t-butyl-3- methylphenol disulphide regeneration activator is 100:15-20:3-5:2-4. The quality of the regenerated rubber prepared by utilizing the method in the invention is excellent, the tensile strength is up to 11MPa, and the elongation at break is up to 401%. The prepared regenerated rubber can replace natural or synthetic rubber.
Description
Technical field
The present invention relates to waste old by force chemistry desulfurization regeneration technology, particularly waste old prepares high-performance regenerated rubber technology.
Background technology
Rubber is that materials such as rubber and sulphur carry out chemical reaction under certain condition and the random macromolecular elastomer of the netted three-dimensional structure that forms.China since two thousand three is the first in the world rubber-consumer big country always, but the rubber that is consumed relies on import more than 50%.In addition, waste old quantity increases year by year, also wastes resource as untimely processing both contaminate environment, in order to make full use of rubber sources, utilizes waste old to prepare the abundant attention that regenerated rubber has obtained country.This is comprising a requisite technology-desulfurization of step.The devulcanization of waste old is meant waste old through physical and chemical processes such as pulverizing, heating, mechanical treatment, the time it becomes from elastic stage and has rubber plasticity and viscosity, can revulcanization.The essence of sweetening process is: under the comprehensive action of the chemistry of heat, oxygen, mechanical effect and regenerator and physical action etc., the three-dimensional net structure of cross-linked rubber is destroyed, the existing cross-link bond of fracture position also has the macromole key between the cross-link bond.At present, the method of waste old desulfurization, S-S in the waste old, S-C, C-C are not cut off simultaneously with often all making any distinction between, and the molecular structure of the meeting of the C-C key between cut-out rubber macromolecule havoc rubber has caused the various performance index of regenerated rubber only to be equivalent to about 50% of former vulcanized rubber physical index.All kinds of waste olds processing of China and regeneration enterprise are owing to generally adopt above-mentioned indiscriminate traditional technology method to prepare regenerated rubber, the regenerated rubber inferior quality of being produced, therefore can only be as the preparation raw material of low-grade rubber product, or in high-grade rubber item, make filler and use, this has just restricted the range of application of China's regenerated rubber.
Summary of the invention
The present invention is directed to the existing regenerated rubber poor performance of China, can not widespread use deficiency, a kind of method for preparing the high-performance regenerated rubber has been proposed, purpose is to start with from the devulcanization of waste old, improve the desulfurization degree of waste old, and then preparation high-performance regenerated rubber, but make its widespread use and energy 100% replace natural rubber.
The technical solution adopted in the present invention:
(1) sulfur removal technology of improvement waste old makes waste old desulfurization degree reach maximum by force chemistry at short notice.Wherein working temperature is a room temperature, and operating pressure is a normal pressure, and desulfurization time is less than 1 hour.
(2) improved the preparation prescription of regenerated rubber.Usually the composition of regenerated rubber comprises rubber powder, tenderizer, tackifier and regeneration activator, the main composition that the present invention prepares regenerated rubber is waste rubber powder, commercially available RX-80 Rubber Softener, self-control rubber tackifier (using tert-octylphenol, naphthenic acid, formaldehyde and rose vitriol preparation), 4,6-di-tert-butyl-3-methylphenol disulphide regeneration activator.Their proportioning is followed successively by (wt%) 100: 16-20: 3-5: 2-4.
Beneficial effect of the present invention:
(1) technology simple possible of the present invention is carried out desulfurization to waste old under the normal temperature and pressure and is handled, and equipment is carried out sound-proof and dedusting, noiselessness, dust, tailings, and recycle cooling water plays promoter action to environment protection.
(2) desulfurization time of the present invention shortens 1/3rd than traditional technology approximately, finishes within an hour, has improved production efficiency greatly.
(3) the present invention adopts novel sulfur removal technology and 4,6-di-tert-butyl-3-methylphenol disulphide highly efficient regeneration activator, so the regenerated rubber performance of producing significantly improves, tensile strength is brought up to 11MPa, tensile yield brings up to 401%, and moisture, ash content acetone extract, mooney viscosity descend obviously in the product.
Following table is listed the every performance index and the GB of the high-performance regenerated rubber of the present invention's production respectively:
The high-performance reclaimed rubber performance index that the present invention produces
| Kind | High-quality reclaimed rubber | High-quality reclaimed rubber | High-quality reclaimed rubber | High-quality reclaimed rubber |
| Grade | Qualified | One-level | Top grade | Special top grade |
| Moisture/%≤ | ??1.2 | ??1.2 | ??1.2 | ??1.2 |
| Ash content/%≤ | ??12 | ??11 | ??10 | ??9 |
| Acetone extract/%≤ | ??25 | ??23 | ??22 | ??20 |
| Tensile strength/MPa 〉= | ??8 | ??9 | ??10 | ??11 |
| Tensile yield/% 〉= | ??370 | ??375 | ??390 | ??401 |
| Mooney viscosity [100 ℃ of ML (1+4)]≤ | ??75 | ??75 | ??70 | ??70 |
Regenerated rubber various performance parameters in the GB
Description of drawings
Accompanying drawing 1 is preparation method's of the present invention process flow sheet.
Embodiment
Main technique flow process of the present invention is: waste old-wash-dry-fragmentation-screening-magnetic separation-be mixed (adding sweetening agent, tenderizer, regeneration activator etc.)-desulfurization (force chemistry)-thick refining-refining-moulding-packing-finished product.
Case study on implementation 1: regain rubber, rinse out dirts such as dust, dry,, cross 60 mesh sieves through crusher in crushing, remove impurity such as iron wire in the broken rubber by magnetic separation, 100 parts of rubber powders of preparation, adds 5 parts of sweetening agents, 17 parts of tenderizers, 4 parts in highly efficient regeneration activator, 3 parts of mixed preparing of self-control tackifier after, carry out desulfurization in the adding force chemistry device, this technology is carried out at normal temperatures and pressures, and the time is less than one hour.Sulfur removal technology among the present invention is to utilize C-C in the rubber (370KJ/mol), C-S (310KJ/mol), S-S (270KJ/mol) bond energy difference, makes S-S key and C-S bond rupture in the waste old, and does not destroy rubber backbone C-C bond structure.Desulfurization process finishes promptly to enter thick refining, with pressure roller it is pressed into film about thick 3.5mm, enters refining then, order ground is the macromolecular structure that cuts off regenerated rubber, be refined into the thin film of 0.1-0.5mm, and then compressed package dresses up finished product, obtain the regenerated rubber of excellent performance.
Case study on implementation 2: regain rubber, rinse out dirts such as dust, dry,, cross 60 mesh sieves through crusher in crushing, remove impurity such as iron wire in the broken rubber by magnetic separation, 100 parts of rubber powders of preparation, adds 4 parts of sweetening agents, 18 parts of tenderizers, 3 parts in highly efficient regeneration activator, 4 parts of mixed preparing of self-control tackifier after, carry out desulfurization in the adding force chemistry device, this technology is carried out at normal temperatures and pressures, and the time is less than one hour.Sulfur removal technology among the present invention is to utilize C-C in the rubber (370KJ/mol), C-S (310KJ/mol), S-S (270KJ/mol) bond energy difference, makes S-S key and C-S bond rupture in the waste old, and does not destroy rubber backbone C-C bond structure.Desulfurization process finishes promptly to enter thick refining, with pressure roller it is pressed into film about thick 3.5mm, enters refining then, order ground is the macromolecular structure that cuts off regenerated rubber, be refined into the thin film of 0.1-0.5mm, and then compressed package dresses up finished product, obtaining newly can excellent regenerated rubber.
Case study on implementation 3: regain rubber, rinse out dirts such as dust, dry,, cross 60 mesh sieves through crusher in crushing, remove impurity such as iron wire in the broken rubber by magnetic separation, 100 parts of rubber powders of preparation, adds 3 parts of sweetening agents, 19 parts of tenderizers, 2 parts in highly efficient regeneration activator, 5 parts of mixed preparing of self-control tackifier after, carry out desulfurization in the adding force chemistry device, this technology is carried out at normal temperatures and pressures, and the time is less than one hour.Sulfur removal technology among the present invention is to utilize C-C in the rubber (370KJ/mol), C-S (310KJ/mol), S-S (270KJ/mol) bond energy difference, makes S-S key and C-S bond rupture in the waste old, and does not destroy rubber backbone C-C bond structure.Desulfurization process finishes promptly to enter thick refining, with pressure roller it is pressed into film about thick 3.5mm, enters refining then, order ground is the macromolecular structure that cuts off regenerated rubber, be refined into the thin film of 0.1-0.5mm, and then compressed package dresses up finished product, obtaining newly can excellent regenerated rubber.
Claims (3)
1. the three-dimensional desulfurization technology of shearing of solid-phase grinding prepares regenerated rubber technology.The three-dimensional desulfurization technology of shearing of solid-phase grinding is characterised in that sulfur removal technology carries out at normal temperatures and pressures, utilizes the bond energy between waste old cross-link bond and the major key poor, and the cross-link bond in the selective rhizotomy waste old keeps the molecule major key.
2. the raw material of right 1 described regenerated rubber technology consists of rubber powder, tenderizer, softening agent and the highly efficient regeneration activator through the waste old preparation.It is characterized in that described tenderizer is RX-80 Rubber Softener, softening agent and 4,6-di-tert-butyl-3-methylphenol disulphide regeneration activator, their proportioning is (wt%) 100: 16-20: 3-5: 2-4.
The steps in sequence of right 1 described regenerated rubber technology be that waste old washes, dries, fragmentation, screening, magnetic separation, be mixed, desulfurization, thick refining, refining, moulding, packing and finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN200810236016A CN101747528A (en) | 2008-12-02 | 2008-12-02 | Mechanochemical method for preparing high-performance regenerated rubber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810236016A CN101747528A (en) | 2008-12-02 | 2008-12-02 | Mechanochemical method for preparing high-performance regenerated rubber |
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| CN101747528A true CN101747528A (en) | 2010-06-23 |
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| CN200810236016A Pending CN101747528A (en) | 2008-12-02 | 2008-12-02 | Mechanochemical method for preparing high-performance regenerated rubber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102964653A (en) * | 2012-11-12 | 2013-03-13 | 江苏东旭科技有限公司 | Processing method of regenerated rubber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102964653A (en) * | 2012-11-12 | 2013-03-13 | 江苏东旭科技有限公司 | Processing method of regenerated rubber |
| CN102964653B (en) * | 2012-11-12 | 2015-01-07 | 江苏东旭科技有限公司 | Processing method of regenerated rubber |
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Open date: 20100623 |