GB577868A - Improvements in or relating to the regeneration of vulcanised rubber - Google Patents
Improvements in or relating to the regeneration of vulcanised rubberInfo
- Publication number
- GB577868A GB577868A GB176543A GB176543A GB577868A GB 577868 A GB577868 A GB 577868A GB 176543 A GB176543 A GB 176543A GB 176543 A GB176543 A GB 176543A GB 577868 A GB577868 A GB 577868A
- Authority
- GB
- United Kingdom
- Prior art keywords
- agent
- acid
- peptising
- per cent
- vulcanized rubber
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2321/00—Characterised by the use of unspecified rubbers
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
Vulcanized rubber is regenerated by reducing it to finely-divided form and then subjecting it to mechanical treatment in the presence of a softening-agent, a peptising-agent, and an organic acid. The vulcanized rubber is first reduced to a fine crumb by passing through grinding-rolls having a high differential speed ratio; the organic acid (benzoic acid or one of its substituted derivatives such as o-, m- or p-nitrobenzoic acid, the dinitrobenzoic acids or a halogen-substituted benzoic acid) and a neutral softening-agent (of hydroxylic or oxygen-containing character such as pine tar, pine oil, or coumarone resin) are added, the product being milled for a short period between rolls having a tight nip and a small differential speed ratio; the peptising-agent (an organic compound containing a mercapto group such as mercaptobenzthiazole or a - or b -naphthyl mercaptan) is then added, and the mixture subjected to mechanical working until a coherent sheet results. The temperature is preferably maintained below 60 DEG C. at least until the agents have been incorporated, when the mix may be raised to at least 100 DEG C. and the working continued for a further period. Suitable proportions are 0.5-3 per cent of acid, 2-10 per cent of softener, and 0.25-2 per cent of peptising-agent by weight of the vulcanized rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB176543A GB577868A (en) | 1943-02-03 | 1943-02-03 | Improvements in or relating to the regeneration of vulcanised rubber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB176543A GB577868A (en) | 1943-02-03 | 1943-02-03 | Improvements in or relating to the regeneration of vulcanised rubber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB577868A true GB577868A (en) | 1946-06-04 |
Family
ID=9727591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB176543A Expired GB577868A (en) | 1943-02-03 | 1943-02-03 | Improvements in or relating to the regeneration of vulcanised rubber |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB577868A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2783213A (en) * | 1952-08-18 | 1957-02-26 | Midwest Rubber Reciaiming Comp | Rubber reclaims and process for producing same |
| CN113843931A (en) * | 2021-09-17 | 2021-12-28 | 西南技术物理研究所 | GD414C silicon rubber resistivity changing method |
-
1943
- 1943-02-03 GB GB176543A patent/GB577868A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2783213A (en) * | 1952-08-18 | 1957-02-26 | Midwest Rubber Reciaiming Comp | Rubber reclaims and process for producing same |
| CN113843931A (en) * | 2021-09-17 | 2021-12-28 | 西南技术物理研究所 | GD414C silicon rubber resistivity changing method |
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