CN101074302A - High-quality regenerated rubber and its production - Google Patents

High-quality regenerated rubber and its production Download PDF

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Publication number
CN101074302A
CN101074302A CNA2007100243569A CN200710024356A CN101074302A CN 101074302 A CN101074302 A CN 101074302A CN A2007100243569 A CNA2007100243569 A CN A2007100243569A CN 200710024356 A CN200710024356 A CN 200710024356A CN 101074302 A CN101074302 A CN 101074302A
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CN
China
Prior art keywords
rubber
high
desulfurization
tenderizer
regenerated rubber
Prior art date
Application number
CNA2007100243569A
Other languages
Chinese (zh)
Inventor
王士军
Original Assignee
宿迁市强维橡塑有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 宿迁市强维橡塑有限公司 filed Critical 宿迁市强维橡塑有限公司
Priority to CNA2007100243569A priority Critical patent/CN101074302A/en
Publication of CN101074302A publication Critical patent/CN101074302A/en

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Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/70Recovery of polymers other than plastics or rubbers
    • Y02W30/702Recovery of polymers other than plastics or rubbers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation

Abstract

A high-quality regenerated rubber and its production are disclosed. It improves composition and proportion, it adopts high-temperature and pressure desulfurizing method in short time and refining process is added. The tensile strength and breaking extensibility can be increased by 30-60%; it can substitute natural rubber or synthetic rubber and be used as various tyre and raw material of rubber products. It's simple, efficient and smokeless, has excellent abrasive performance, long life, less noise and no refused water discharge.

Description

High-quality regenerated rubber and preparation method thereof

Technical field

The present invention relates to the regeneration techniques of waste old, particularly utilize waste old to prepare the method for high-quality regenerated rubber.

Background technology

Because the output of rubber has its certain limitation, in order to make full use of rubber sources, the preparation of regenerated rubber and use national abundant attention.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.Regenerated rubber is to make vulcanized rubber be returned to the structure of original unvulcanized rubber more again, so must cut-out form the firm crosslinked site based on the sulphur chain (being not that sulphur is removed) from rubber in the technological process of preparation regenerated rubber.At present, the method for preparing regenerated rubber, often all be not cut off simultaneously based on the crosslinked site of sulphur chain and the major key of rubber itself with making any distinction between, and cut off rubber the major key havoc molecular structure of rubber, caused the various physical indexs of regenerated rubber only to be equivalent to about 50% of former vulcanized rubber physical index.China is the big country that regenerated rubber is produced, but because the regenerated rubber inferior quality of using above-mentioned traditional technology to produce, thereby can only be used 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 regenerated rubber.Because added value of product is low, economic benefit is also poor, and for a long time, the development that regenerated rubber prepares industry is in the low-level state of pacing up and down always.

Summary of the invention

The present invention is directed to existing regenerated rubber and have weak points such as inferior quality, a kind of high-quality regenerated rubber and preparation method thereof has been proposed, purpose is to set about and then improve from the processing method of improving the regenerated rubber preparation quality of regenerated rubber, it is become have raw material higher use value, that can be applicable to make high-grade rubber item.

The present invention is as follows through the technical solution that test of many times draws

(1) improves the constituent of preparation regenerated rubber and the weight part proportioning of constituent thereof.Usually the constituent of regenerated rubber comprises rubber powder, activator, tenderizer, tackifier, the constituent that the present invention prepares regenerated rubber is mainly rubber powder (powdery waste old) and No. 450 activators, solid coal tar tenderizer, rosin tackifier that can be commercially available; The proportioning of their weight parts is followed successively by 100: 3-5: 15-20: 3-5.

(2) improve the production technique for preparing again rubber, particularly improve its sulfur removal technology parameter with increasing refining procedure again, wherein sulfur removal technology adopts high temperature, high pressure, short period of time doctor treatment, its temperature parameter scope is 240 ℃-260 ℃, pressure parameter is 2.6-3.0MPA, and desulfurization time is in one hour.

Beneficial effect of the present invention:

(1) the present invention is because in constituent, constituent proportioning and technical process thereof, processing parameter improves, so the quality of the regenerated rubber of being produced has just had raising by a relatively large margin, the tensile strength of its main physical index, tensile yield can improve 30-60%, and product ash, acetone extract, mooney viscosity have obvious decline.Technology of the present invention makes various waste olds can recover to reach more than 90% of performance of former vulcanized rubber through regenerating, and alternative natural rubber or synthetic rubber are used for the production of various tires and rubber item, and the product wear resistance is strong, long service life.

Provide high-quality regenerated rubber performance index that regenerated rubber that traditional technology produces and the present invention produced below respectively to contrast:

The grade of existing various regenerated rubbers and chemical physics performance index (GB) Kind grade project Whole-tyre reclaim Footwear reclaim The sundry goods reclaimed rubber Top grade One-level Qualified Top grade One-level One-level Qualified Moisture content %≤ 1.20 ?1.20 ?1.20 ?1.30 ?1.50 ?1.20 ?1.50 Ash %≤ 10.00 ?12.00 ?15.00 ?32.00 ?38.00 ?30.00 ?40.00 Acetone extract %≤ 20.00 ?25.00 ?28.00 ?17.00 ?19.00 ?20.00 ?25.00 The grain stretch intensity/MPa 〉= 9.05 ?8.00 ?6.00 ?5.50 ?4.00 ?5.50 ?3.50 Tensile yield % 〉= 390 ?360 ?320 ?350 ?230 ?350 ?230 Mooney viscosity [100 ℃ of ML (1+4)]≤ 70 ?75 ?80 ?80 ?80 ?70 ?80

The high-quality reclaimed rubber quality of the present invention inner quality standard Kind grade project High-quality reclaimed rubber is qualified High-quality reclaimed rubber one-level High-quality reclaimed rubber top grade The special top grade of high-quality reclaimed rubber Moisture content/% 1.20 ?1.20 ?1.20 ?1.20 Ash/% 12 ?11 ?10 ?8 Acetone extract/% 23 ?22 ?21 ?20 Grain is stretched intensity/MPa 12 ?14 ?16 ?18 Tensile yield/% 440 ?460 ?480 ?500 Mooney viscosity/[100 ℃ of ML (1+4)] 70 ?70 ?70 ?70

(2) technology simple possible of the present invention adopts electrically heated desulfurization technology and efficient tail-gas purifying device, and no flue dust, no waste sludge discharge have good environment protecting; Cooling water circulation use, non-wastewater discharge, water saving; Concise equipment adopts bi-motor twin shaft rotational noise little.

(3) the sulfur removal technology short period of time of the present invention, improved 3 times production efficiency nearly.

Description of drawings

Accompanying drawing 1 is preparation method's of the present invention process flow diagram.

Embodiment

The technical process that provides the inventive method earlier is mainly: the refining-die mould-packing-finished product of damaged tire-fragmentation-screening-magnetic separation-be mixed (add activator, tenderizer)-desulfurization-thick refining-refining-again.

Embodiment, regain damaged tire, through crusher in crushing, cross 40 mesh sieves, the impurity such as iron wire in the junked tire are removed in magnetic separation, the preparation rubber powder is 100 parts, add after 3 parts of 3 parts in No. 450 activators and 15 parts of solid coal tar tenderizers, rosin tackifier are mixed, enter desulfurization process, temperature (about 217 ℃), pressure (1.8-2MPa) desulfurization time (2-3 hour) parameter with the conventional dynamic sulfur removal technology, bringing up to temperature and be 240-260 ℃, pressure is 2.6-3MPa, and the time was reduced between 60-40 minute.Sulfur removal technology is by high temperature, high-pressure physics mode, and the polysulfide of rubber powder progressively is converted into monosulphide, and cuts off the crosslinked site of monosulphide; The chemical process that adds activator, tenderizer has been quickened infiltration infiltration, diffusion to waste vulcanized rubber, has improved the thermooxidative degradation speed of the crosslinked site of sulfide linkage, has stoped the anti-aging process of regurgitation.Thereby make and to have quickened to finish the cut-out of the crosslinked site of sulfide linkage at short notice, and not destroy the rubber backbone structure in the whole sulfur removal technology.Desulfurization process finishes just to enter thick refining operation, vulcanized rubber after the desulfurization is at naturally cooling or with the water quench temperature during to 60-80 ℃, with pressure roller it is suppressed into film about thick 3.5mm, enter refining procedure then, purpose is the macromolecular structure that cuts off rubber, opens and is smelt thick 0.2-0.3mm film, next step enters refining procedure again, pressure roller being pressed into the thin film of 0.1-0.5mm, and then die mould is packaged to finished product, thereby obtains to recover the regenerated rubber of the person's character of former vulcanized rubber.

In like manner, the present invention changes the various proportion of raw materials of preparation regenerated rubber in the certain limit that provides, adopt above-mentioned same processing step, the parameter that only makes desulfurization also changes in the certain limit that provides also can obtain special top grade, top grade, one-level, qualified high-quality regenerated rubber respectively.

Most preferred embodiment of the present invention:

Get 100 parts of weight part rubber powders, 4 parts in 450 activators, 20 parts of solid coal tar tenderizers, 3 parts of rosin tackifier, adopt the identical processing step of embodiment, wherein, temperature parameter in the desulfurization process is 240 ℃, operating pressure is 2.6MPa, and desulfurization time 50 minutes can obtain the high-quality reclaimed rubber of special top grade at last.

To sum up, the present invention has fundamentally solved the problem of utilizing again of waste rubber resources.

Claims (3)

1, high-quality regenerated rubber, main constituent is rubber powder, activator, tenderizer, rosin tackifier, it is characterized in that: described activator is that No. 450 activators, tenderizers are solid coal tar tenderizer, together with rosin tackifier, the proportioning of their weight parts is followed successively by 100: 3-5: 15-20: 3-5.
2, a kind of preparation method of high-quality regenerated rubber as claimed in claim 1, its process is followed successively by that damaged tire fragmentation, screening, magnetic separation, adding activator, tenderizer are mixed, desulfurization, thick refining, refining, die mould are packaged to finished product, it is characterized in that: described desulfurization process step is short time high temperature, high pressure desulfurization, its temperature parameter scope is 240 ℃-260 ℃, pressure parameter is 2.6-3.0MPA, and desulfurization time is in one hour.
3, high-quality regenerated rubber according to claim 1 and 2 and preparation method thereof, it is characterized in that: described main constituent is rubber powder, No. 450 activators, solid coal tar tenderizer, rosin tackifier, and the proportioning of their weight part was followed successively by 100: 4: 20: 3; Temperature parameter in the desulfurization process is 240 ℃, and operating pressure is 2.6MPa, and desulfurization time is 50 minutes.
CNA2007100243569A 2007-06-14 2007-06-14 High-quality regenerated rubber and its production CN101074302A (en)

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Application Number Priority Date Filing Date Title
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CN101074302A true CN101074302A (en) 2007-11-21

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101307153B (en) * 2008-07-14 2010-09-22 金轮橡胶(海门)有限公司 Method for producing chlorobutyl reclaimed rubber
CN102295791A (en) * 2011-05-23 2011-12-28 浙江力源化工有限公司 High-strength reclaimed rubber
CN102492168A (en) * 2011-12-08 2012-06-13 四川省隆昌海燕橡胶有限公司 Preparation method of super reclaimed rubber
CN101906217B (en) * 2009-06-08 2012-07-25 福建环科集团三明市高科橡胶有限公司 Environment-friendly high-quality tyre reclaimed rubber manufacturing method
CN102672851A (en) * 2012-06-12 2012-09-19 天津市明基金泰橡塑制品加工有限公司 Method for processing 600-mesh fine rubber powder
CN102702592A (en) * 2012-05-03 2012-10-03 湖北工业大学 High-performance regenerated rubber and preparation method thereof
CN101628997B (en) * 2009-08-01 2013-04-10 仙桃市聚兴橡胶有限公司 Method for producing light-colored reclaimed rubber by using waste red inner tubes as raw material
CN103319756A (en) * 2013-06-03 2013-09-25 宁波千汇汽车饰件有限公司 Preparation technology of engine rubber pad
CN103694521A (en) * 2012-09-27 2014-04-02 江西利新橡胶有限公司 Manufacturing method for fragrant high-tenacity tire reclaimed rubber
CN104526910A (en) * 2015-01-06 2015-04-22 陈静 Process of producing high-performance regenerated rubber through waste tires
CN104861223A (en) * 2015-05-06 2015-08-26 吴芳吉 Car rubber cushion block
CN105601990A (en) * 2016-02-04 2016-05-25 青岛科技大学 Modified waste tire rubber powder and preparation method thereof
CN105754173A (en) * 2016-03-13 2016-07-13 北京化工大学 Low-cost and efficient method using devulcanized rubber powder to directly prepare rubber compound
CN105949504A (en) * 2016-06-23 2016-09-21 南通回力橡胶有限公司 Regeneration production method of scrap rubber

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101307153B (en) * 2008-07-14 2010-09-22 金轮橡胶(海门)有限公司 Method for producing chlorobutyl reclaimed rubber
CN101906217B (en) * 2009-06-08 2012-07-25 福建环科集团三明市高科橡胶有限公司 Environment-friendly high-quality tyre reclaimed rubber manufacturing method
CN101628997B (en) * 2009-08-01 2013-04-10 仙桃市聚兴橡胶有限公司 Method for producing light-colored reclaimed rubber by using waste red inner tubes as raw material
CN102295791A (en) * 2011-05-23 2011-12-28 浙江力源化工有限公司 High-strength reclaimed rubber
CN102492168A (en) * 2011-12-08 2012-06-13 四川省隆昌海燕橡胶有限公司 Preparation method of super reclaimed rubber
CN102702592A (en) * 2012-05-03 2012-10-03 湖北工业大学 High-performance regenerated rubber and preparation method thereof
CN102702592B (en) * 2012-05-03 2014-08-20 湖北工业大学 High-performance regenerated rubber and preparation method thereof
CN102672851A (en) * 2012-06-12 2012-09-19 天津市明基金泰橡塑制品加工有限公司 Method for processing 600-mesh fine rubber powder
CN103694521A (en) * 2012-09-27 2014-04-02 江西利新橡胶有限公司 Manufacturing method for fragrant high-tenacity tire reclaimed rubber
CN103319756A (en) * 2013-06-03 2013-09-25 宁波千汇汽车饰件有限公司 Preparation technology of engine rubber pad
CN103319756B (en) * 2013-06-03 2015-08-26 宁波千汇汽车饰件有限公司 A kind of preparation technology of engine rubber pad
CN104526910A (en) * 2015-01-06 2015-04-22 陈静 Process of producing high-performance regenerated rubber through waste tires
CN104861223A (en) * 2015-05-06 2015-08-26 吴芳吉 Car rubber cushion block
CN105601990A (en) * 2016-02-04 2016-05-25 青岛科技大学 Modified waste tire rubber powder and preparation method thereof
CN105754173A (en) * 2016-03-13 2016-07-13 北京化工大学 Low-cost and efficient method using devulcanized rubber powder to directly prepare rubber compound
CN105754173B (en) * 2016-03-13 2019-07-05 北京化工大学 A kind of method that inexpensive, high efficiency is directly prepared rubber compound by desulfurization powder
CN105949504A (en) * 2016-06-23 2016-09-21 南通回力橡胶有限公司 Regeneration production method of scrap rubber
CN105949504B (en) * 2016-06-23 2018-09-11 南通回力橡胶有限公司 A kind of scrap rubber regeneration production method

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