CN110878148B - Method for modifying pyrolysis carbon black - Google Patents
Method for modifying pyrolysis carbon black Download PDFInfo
- Publication number
- CN110878148B CN110878148B CN201911137350.1A CN201911137350A CN110878148B CN 110878148 B CN110878148 B CN 110878148B CN 201911137350 A CN201911137350 A CN 201911137350A CN 110878148 B CN110878148 B CN 110878148B
- Authority
- CN
- China
- Prior art keywords
- carbon black
- rubber emulsion
- rubber
- emulsion
- mass
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/10—Encapsulated ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/02—Ingredients treated with inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/08—Ingredients agglomerated by treatment with a binding agent
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention relates to a method for modifying pyrolysis carbon black, which comprises treating the pyrolysis carbon black by using rubber emulsion. The method provided by the invention adopts the principle of alkali washing and macromolecule wrapping to dissolve strong base in rubber emulsion, emulsify and adsorb organic impurities on carbon black into the emulsion, and dissolve zinc oxide and white carbon black (silicon dioxide) into the strong base. Because of the wrapping property of the rubber macromolecule to the low molecular compound, the dried solid component can be retained in the corresponding macromolecule material, thereby cleaning the carbon black, exposing the active points and recovering the original reinforcing property.
Description
Technical Field
The invention relates to a method for modifying pyrolysis carbon black.
Background
Carbon black is one of the most widely used and important reinforcing fillers in the rubber industry, has a good reinforcing effect, and can improve certain specific properties of rubber. The main component of the waste tire cracking carbon black is carbon black added in the tire production process, the cracking carbon black is more and more concerned when being applied to rubber products as a rubber reinforcing filler, if the cracking carbon black which is one of waste tire cracking products can partially or completely replace certain brands of commodity carbon black, the cyclic utilization of resources can be realized, positive influence is generated on the environment, the production cost of enterprises is greatly reduced, the profit of the waste tire cracking industry is improved, and the benefit maximization is realized.
Because the tires contain solid components such as zinc oxide, white carbon black and the like, and the cracking reaction is incomplete, the generated carbon black contains impurities such as tar, ash and the like, the quality is seriously influenced, the reinforcing property is very low, and an effective treatment method for improving the performance and the economic value is urgently needed.
The treatment of cracked carbon black in the current patents and literature is mainly focused on the following technical directions: (1) the tar can be removed by solvent cleaning, but the filtration is difficult and the industrialization is difficult to implement; (2) microwave pyrolysis, no mature industrial case exists at present, the energy consumption is high, and ash can not be removed; (3) the coupling agent treatment has complex process and high cost; (4) the ash is removed by acid washing and the ash is removed by alkali washing, which brings new problems of waste water treatment, and the filtering speed is slow and the industrialization is difficult.
Disclosure of Invention
Carbon black is generated during pyrolysis of waste rubber, waste plastic and the like, and because of the complexity and incompleteness of the reaction, coking oil, rubber hydrocarbon, zinc oxide, white carbon black and the like can be remained on carbon black particles to block micropores in the carbon black and active points on the outer edge, so that the reinforcing performance of the pyrolysis carbon black is seriously influenced, and the carbon black can only be used for low-grade fillers.
In view of the above problems in the prior art, the present invention provides, in a first aspect, a method for modifying a carbon black by treating the carbon black with a rubber emulsion to partially or completely restore its original reinforcing properties.
The second aspect of the invention provides a method for modifying pyrolysis carbon black, which adopts the principle of alkali washing and macromolecule wrapping to dissolve strong base in rubber emulsion, emulsify and adsorb organic impurities on the carbon black into the emulsion, and dissolve zinc oxide and white carbon black (silicon dioxide) into the strong base. Because of the wrapping property of the rubber macromolecule to the low molecular compound, the dried solid component can be retained in the corresponding macromolecule material, thereby cleaning the carbon black, exposing the active points and recovering the original reinforcing property.
A third aspect of the present invention provides a carbon black prepared according to the method of the first or second aspect.
According to a first aspect of the invention, the method of modifying a pyrolytic carbon black comprises treating a pyrolytic carbon black with a rubber emulsion.
According to some embodiments of the invention, the rubber emulsion is selected from one or more of a natural rubber emulsion and a synthetic rubber emulsion.
According to some embodiments of the present invention, the rubber emulsion is selected according to the type of rubber used in the rubber article formulation.
In some preferred embodiments of the present invention, the rubber is selected from one or more of natural rubber emulsion, styrene-butadiene rubber emulsion, nitrile-butadiene rubber emulsion, butyl rubber emulsion, neoprene rubber emulsion, polysulfide rubber emulsion, cis-butadiene rubber emulsion, isoprene rubber emulsion, and ethylene-propylene rubber emulsion.
In some preferred embodiments of the invention, the rubber emulsion is a natural rubber emulsion.
According to some embodiments of the present invention, the different rubber latex types can be used in combination, and only the compatibility between the rubber latex is ensured.
According to some embodiments of the invention, the solid rubber is present in the rubber emulsion in an amount of 2 to 10% by mass, e.g., 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, 8.5%, 9.0%, 9.5%, 10.0% by mass and any value therebetween, based on the mass of the cracked carbon black.
According to some embodiments of the invention, the pyrolysis carbon black is selected from one or more of waste rubber pyrolysis carbon black and waste plastic pyrolysis carbon black.
According to some embodiments of the invention, the carbon black is a tire carbon black.
According to some embodiments of the present invention, the content of the colloid oil and residual rubber hydrocarbon in the tire cracking carbon black is within 2%, and the organic components can be completely adsorbed by taking solid rubber accounting for 2-10% of the carbon black, and the separated zinc and silicon compounds are fixed.
According to some embodiments of the invention, the solid rubber is present in an amount of 3 to 6% by mass of the cracked carbon black.
According to a second aspect of the invention, the method of modifying a pyrolysis carbon black comprises the steps of:
s1: dispersing the cracking carbon black in a mixed solution to form a dispersion liquid, wherein the mixed solution comprises rubber emulsion and strong base;
s2: curing the dispersion liquid obtained in the step S1 to obtain a cracked carbon black mixture;
s3: the cracked carbon black mixture in step S2 is dried, and the evaporated water is recovered.
According to some embodiments of the invention, the rubber emulsion is selected from one or more of a natural rubber emulsion and a synthetic rubber emulsion.
According to some embodiments of the present invention, the rubber emulsion is selected according to the type of rubber used in the rubber article formulation.
In some preferred embodiments of the present invention, the rubber is selected from one or more of natural rubber emulsion, styrene-butadiene rubber emulsion, nitrile-butadiene rubber emulsion, butyl rubber emulsion, neoprene rubber emulsion, polysulfide rubber emulsion, cis-butadiene rubber emulsion, isoprene rubber emulsion, and ethylene-propylene rubber emulsion.
In some preferred embodiments of the invention, the rubber emulsion is a natural rubber emulsion.
According to some embodiments of the present invention, the different rubber latex types can be used in combination, and only the compatibility between the rubber latex is ensured.
According to some embodiments of the invention, the strong base is selected from one or more of an alkali metal hydroxide and an alkaline earth metal hydroxide.
According to some embodiments of the invention, the strong base is selected from one or more of sodium hydroxide, potassium hydroxide and lithium hydroxide.
According to some embodiments of the invention, the alkali is first dissolved in water to form a lye, which is then mixed with the rubber emulsion.
According to some embodiments of the invention, the solid rubber is present in the rubber emulsion in an amount of 2 to 10% by mass, e.g., 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, 8.5%, 9.0%, 9.5%, 10.0% by mass and any value therebetween, based on the mass of the cracked carbon black.
According to some embodiments of the invention, the pyrolysis carbon black is selected from one or more of waste rubber pyrolysis carbon black and waste plastic pyrolysis carbon black.
According to some embodiments of the invention, the carbon black is a tire carbon black.
According to some embodiments of the present invention, the content of the colloid oil and residual rubber hydrocarbon in the tire cracking carbon black is within 2%, and the organic components can be completely adsorbed by taking solid rubber accounting for 2-10% of the carbon black, and the separated zinc and silicon compounds are fixed.
According to some embodiments of the invention, the solid rubber is present in an amount of 3 to 6% by mass of the cracked carbon black.
According to some embodiments of the invention, the strong base is present in an amount of 8-15% by mass of the cracked carbon black, e.g., 8.0%, 8.5%, 9.0%, 9.5%, 10.0%, 10.5%, 11.0%, 11.5%, 12.0%, 12.5%, 13.0%, 13.5%, 14.0%, 14.5%, 15.0% and any value therebetween.
According to some embodiments of the present invention, the amount of the strong base is determined according to the ash content (zinc oxide and white carbon black) in the cracked carbon black, and the total content of the zinc oxide and the white carbon black in the tire formula is usually 8-15%, so that the effect is the best when the amount of the strong base accounts for 8-15% of the mass of the carbon black, and the excessive strong base does not bring about a better modification effect, but increases the content of inorganic components in the vulcanized rubber, resulting in performance degradation.
According to some embodiments of the invention, the strong base is present in an amount of 10 to 12% by mass of the cracked carbon black.
In some preferred embodiments of the present invention, sodium hydroxide is added as an auxiliary agent, and reacts with zinc oxide and white carbon black in the cracked carbon black by the following chemical reactions:
ZnO+2NaOH→Na2ZnO2
SiO2+2NaOH→Na2SiO3。
according to some embodiments of the present invention, in step S2, the aging process is an ambient temperature aging process, and the ambient temperature aging process is performed at 15 to 35 ℃ for 3 to 5 hours.
According to some embodiments of the invention, in step S2, the curing process is a thermal curing process, and the temperature of the thermal curing process is lower than the demulsification temperature of the rubber emulsion.
According to some embodiments of the invention, in step S2, the temperature of the warming and curing treatment is 5 to 10 ℃ lower than the demulsification temperature of the rubber emulsion.
According to some embodiments of the present invention, in step S2, the temperature of the thermal aging treatment is 50 to 70 ℃, and the time of the thermal aging treatment is 0.5 to 1 hour.
According to some preferred embodiments of the present invention, the aging treatment adopts a heating aging process, and the tar and other organic matters are softened and even liquefied, so as to facilitate dispersion in a solution system and increase the reaction speed of strong base with zinc oxide and white carbon black.
According to some embodiments of the present invention, the drying temperature of the step S3 is 80-100 ℃.
In some preferred embodiments of the present invention, the method for modifying a cracked carbon black comprises the following specific steps:
(1) dissolving strong base in deionized water to form strong alkali solution, and mixing the strong alkali solution and the rubber emulsion to form mixed solution;
(2) dispersing carbon black into the mixed solution to obtain a dispersion solution, and adding deionized water according to stirring requirements.
(3) Slowly stirring and curing the dispersion for 3-5 hours, or heating and stirring and curing the dispersion for 30-60 minutes. The temperature is controlled according to the emulsion breaking condition (60-70 ℃). The best heating curing process is adopted, the tar and other organic matters are softened and even liquefied, the dispersion into the emulsion is facilitated, and the reaction speed of NaOH and the oxidability and white carbon black is accelerated.
(4) Evaporating and drying the cured carbon black mixture. The drying temperature is 80-90 ℃, and the evaporated water can be recycled.
(5) The dried carbon black contains a certain amount of high polymer, and is granulated by a granulator by utilizing the viscosity of the high polymer, packaged and put in a warehouse.
According to a third aspect of the present invention, the carbon black produced according to the method of the first or second aspect has a tensile strength of up to 8.25MPa, which is improved by about 30-35% compared to that before treatment.
The method for modifying the pyrolysis carbon black provided by the application is characterized in that the principle of alkali washing and polymer wrapping is adopted, the tar, residual rubber hydrocarbon, zinc oxide and white carbon black (silicon dioxide) attached to the surface and the inner space of carbon black particles are partially or completely adsorbed, the purity of the carbon black is improved, the carbon black is directly contacted with rubber, the reinforcing effect of the carbon black is improved by 30% -35%, filtering is not needed in the process, direct granulation is carried out after drying, and no waste is discharged.
Drawings
FIG. 1 is a process flow diagram of a modified pyrolysis carbon black.
Detailed Description
The invention is further illustrated by the following examples, but it is to be noted that the scope of the invention is not limited thereto, but is defined by the claims.
It should be particularly noted that two or more aspects (or embodiments) disclosed in the context of the present specification may be combined with each other at will, and thus form part of the original disclosure of the specification, and also fall within the scope of the present invention.
The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
Example 1
Weighing 12g of sodium hydroxide, dissolving the sodium hydroxide in 25g of deionized water to form an alkali solution, and dissolving 10g of natural rubber emulsion with the solid content of 60% in the alkali solution to obtain a mixed solution;
dissolving 100g of waste tire cracking carbon black in the mixed solution, wherein the mass of solid rubber in the natural rubber emulsion is 6% of that of the cracking carbon black, and the mass of sodium hydroxide is 12% of that of the cracking carbon black;
stirring and curing for 60 minutes at 60 ℃ to obtain a carbon black mixture;
evaporating and drying the cured carbon black mixture at 80-90 ℃, and recycling the evaporated water;
the dried carbon black was pelletized with a pelletizer, and the 300% tensile strength of the treated carbon black was 8.25 MPa.
Comparative example 1
Stirring and curing 100g of waste tire pyrolysis carbon black for 60 minutes at 60 ℃;
evaporating and drying the cured carbon black mixture at 80-90 ℃;
the dried carbon black was pelletized with a pelletizer, and the 300% tensile strength of the treated carbon black was 6.2 MPa.
It should be noted that the above-mentioned embodiments are only for explaining the present invention, and do not set any limit to the present invention. The present invention has been described with reference to exemplary embodiments, but the words which have been used herein are words of description and illustration, rather than words of limitation. The invention can be modified, as prescribed, within the scope of the claims and without departing from the scope and spirit of the invention. Although the invention has been described herein with reference to particular means, materials and embodiments, the invention is not intended to be limited to the particulars disclosed herein, but rather extends to all other methods and applications having the same functionality.
Claims (15)
1. A method of modifying a pyrolytic carbon black comprising treating a pyrolytic carbon black with a rubber emulsion; the method comprises the following steps:
s1: dispersing the cracking carbon black in a mixed solution to form a dispersion liquid, wherein the mixed solution comprises rubber emulsion and strong base;
s2: curing the dispersion liquid obtained in the step S1 to obtain a cracked carbon black mixture;
s3: drying the cracked carbon black mixture obtained in the step S2, and recovering evaporated water;
the mass content of the solid rubber in the rubber emulsion is 2-10% by mass of the pyrolysis carbon black.
2. The method of claim 1, wherein the rubber emulsion is selected from one or more of a natural rubber emulsion and a synthetic rubber emulsion.
3. The method of claim 1, wherein the rubber emulsion is selected from one or more of natural rubber emulsion, styrene-butadiene rubber emulsion, nitrile-butadiene rubber emulsion, butyl rubber emulsion, neoprene rubber emulsion, polysulfide rubber emulsion, butadiene rubber emulsion, isoprene rubber emulsion, and ethylene-propylene rubber emulsion.
4. The method of claim 1, wherein the strong base is selected from one or more of an alkali metal hydroxide and an alkaline earth metal hydroxide.
5. The method of claim 1, wherein the strong base is selected from one or more of sodium hydroxide, potassium hydroxide, and lithium hydroxide.
6. The method according to any one of claims 1 to 5, wherein the rubber emulsion contains 3 to 6% by mass of solid rubber based on the mass of the cracked carbon black.
7. The method according to any one of claims 1 to 5, characterized in that the strong base is present in an amount of 8 to 15% by mass, based on the mass of the cracked carbon black.
8. The method according to any one of claims 1 to 5, wherein the strong base is present in an amount of 10 to 12% by mass based on the mass of the cracked carbon black.
9. The method according to any one of claims 1 to 5, wherein in step S2, the aging treatment is a normal-temperature aging treatment, the temperature of the normal-temperature aging treatment is 15 to 35 ℃, and the time of the normal-temperature aging treatment is 3 to 5 hours.
10. The method according to any one of claims 1 to 5, wherein in step S2, the curing treatment is a heating curing treatment, the temperature of the heating curing treatment is lower than the demulsification temperature of the rubber emulsion, and the time of the heating curing treatment is 0.5 to 1 hour;
and/or in step S3, the temperature of the drying is 80-100 ℃.
11. The method of claim 10, wherein in step S2, the temperature of the warming and curing process is 5-10 ℃ lower than the demulsification temperature of the rubber emulsion.
12. The method according to claim 10, wherein the temperature of the warming and curing treatment in step S2 is 50-70 ℃.
13. The method according to any one of claims 1 to 5, wherein the pyrolysis carbon black is selected from one or more of waste rubber pyrolysis carbon black and waste plastic pyrolysis carbon black.
14. The method according to any one of claims 1 to 5, wherein the cracked carbon black is a waste tire cracked carbon black.
15. Carbon black prepared according to the process of any one of claims 1 to 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911137350.1A CN110878148B (en) | 2019-11-19 | 2019-11-19 | Method for modifying pyrolysis carbon black |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911137350.1A CN110878148B (en) | 2019-11-19 | 2019-11-19 | Method for modifying pyrolysis carbon black |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110878148A CN110878148A (en) | 2020-03-13 |
| CN110878148B true CN110878148B (en) | 2021-06-15 |
Family
ID=69729289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911137350.1A Active CN110878148B (en) | 2019-11-19 | 2019-11-19 | Method for modifying pyrolysis carbon black |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110878148B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111808448A (en) * | 2020-05-07 | 2020-10-23 | 安徽省克林泰迩再生资源科技有限公司 | Preparation method for loading metal oxide on surface of pyrolysis carbon black |
| CN111808445A (en) * | 2020-05-07 | 2020-10-23 | 安徽省克林泰迩再生资源科技有限公司 | Process method for preparing hydrophilic pyrolysis carbon black by using pressure difference |
| CN113150578B (en) * | 2021-04-23 | 2022-04-15 | 双星集团有限责任公司 | Novel modified pyrolysis carbon black and preparation method thereof |
| DE102021209200A1 (en) | 2021-08-20 | 2023-02-23 | Continental Reifen Deutschland Gmbh | Process for the continuous production of starting materials for tire manufacture |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164876A (en) * | 2007-09-30 | 2008-04-23 | 南开大学 | Method for preparing carbon black and active carbon from waste tyre pyrolytic carbon |
| CN105473652A (en) * | 2013-08-30 | 2016-04-06 | 阿米利尔股份公司 | Improved natural rubber compositions |
| JP2017088747A (en) * | 2015-11-11 | 2017-05-25 | 株式会社ブリヂストン | Manufacturing method of wet master batch |
| NL2015888B1 (en) * | 2015-12-01 | 2017-06-14 | Black Bear Carbon B V | Pyrolysis carbon black powder. |
| CN107952260A (en) * | 2016-10-14 | 2018-04-24 | 张瑞永 | Method for extracting and recovering chemicals from carbon black after cracking waste rubber |
| CN108929462A (en) * | 2017-05-24 | 2018-12-04 | 田飞 | A kind of preparation method for rubber reinforcing filler white carbon black |
| CN109504134A (en) * | 2019-01-03 | 2019-03-22 | 蔡国政 | A kind of waste tire production carbon black treatment process |
-
2019
- 2019-11-19 CN CN201911137350.1A patent/CN110878148B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164876A (en) * | 2007-09-30 | 2008-04-23 | 南开大学 | Method for preparing carbon black and active carbon from waste tyre pyrolytic carbon |
| CN105473652A (en) * | 2013-08-30 | 2016-04-06 | 阿米利尔股份公司 | Improved natural rubber compositions |
| JP2017088747A (en) * | 2015-11-11 | 2017-05-25 | 株式会社ブリヂストン | Manufacturing method of wet master batch |
| NL2015888B1 (en) * | 2015-12-01 | 2017-06-14 | Black Bear Carbon B V | Pyrolysis carbon black powder. |
| CN107952260A (en) * | 2016-10-14 | 2018-04-24 | 张瑞永 | Method for extracting and recovering chemicals from carbon black after cracking waste rubber |
| CN108929462A (en) * | 2017-05-24 | 2018-12-04 | 田飞 | A kind of preparation method for rubber reinforcing filler white carbon black |
| CN109504134A (en) * | 2019-01-03 | 2019-03-22 | 蔡国政 | A kind of waste tire production carbon black treatment process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110878148A (en) | 2020-03-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110878148B (en) | Method for modifying pyrolysis carbon black | |
| CA2589307C (en) | Catalytic devulcanization of rubber | |
| CN110804229B (en) | Modification method of pyrolysis carbon black and application thereof | |
| US5798394A (en) | Rubber devulcanization process | |
| US5602186A (en) | Rubber devulcanization process | |
| JP4353569B2 (en) | Devulcanization of cured rubber | |
| CN1264903C (en) | Desulfurization of sulfurized rubber | |
| CN103540172A (en) | Method and system for preparing regenerative carbon black by deashing and modifying pyrolytic carbon of waste rubber and plastic products | |
| Thaicharoen et al. | Thiosalicylic acid as a devulcanizing agent for mechano-chemical devulcanization | |
| CN109504134A (en) | A kind of waste tire production carbon black treatment process | |
| US4052344A (en) | Method of reclaiming scrap vulcanized rubber and the soluble reclaimed rubber thus produced | |
| EP1837368B1 (en) | Composition containing zinc hydroxide, blend containing the composition and article made thereof | |
| CN116640466A (en) | Modified pyrolytic carbon black | |
| CN110760132A (en) | High-temperature-resistant low-voltage-variable ethylene propylene diene monomer rubber and preparation method thereof | |
| AU2003266892A1 (en) | Rubber reduction | |
| CN112831148A (en) | Preparation method of modified rubber powder | |
| CN115073808A (en) | Method for recovering nylon 6 from tire cord fabric, cleaning solution and regenerated nylon 6 | |
| CN203530201U (en) | System for producing regenerative carbon black from waste rubber and plastic product pyrolytic carbon subjected to dust removal and modification | |
| CN104056613A (en) | Preparation method of waste plastics catalytic cracking catalyst | |
| Rajan et al. | Comparative investigation on the reclamation of NR based latex products with amines and disulfides | |
| CN110343304B (en) | Method for preparing rubber emulsion by using waste rubber and rubber emulsion prepared by method | |
| CN115322435B (en) | Environment-friendly recycling method for waste rubber and application thereof | |
| CN111826087A (en) | Water-based non-curing rubber asphalt waterproof coating and preparation method thereof | |
| CN108285563A (en) | A kind of preparation method of compliant rubber powder | |
| CN113337002B (en) | Environment-friendly waste rubber regenerant and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |