GB578482A - Improvements in or relating to the regeneration of vulcanised synthetic rubber-like materials - Google Patents

Improvements in or relating to the regeneration of vulcanised synthetic rubber-like materials

Info

Publication number
GB578482A
GB578482A GB1018243A GB1018243A GB578482A GB 578482 A GB578482 A GB 578482A GB 1018243 A GB1018243 A GB 1018243A GB 1018243 A GB1018243 A GB 1018243A GB 578482 A GB578482 A GB 578482A
Authority
GB
United Kingdom
Prior art keywords
synthetic rubber
acid
rolls
mixture
per cent
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
Application number
GB1018243A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dunlop Rubber Co Ltd
Original Assignee
Dunlop Rubber Co Ltd
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.)
Filing date
Publication date
Application filed by Dunlop Rubber Co Ltd filed Critical Dunlop Rubber Co Ltd
Priority to GB1018243A priority Critical patent/GB578482A/en
Publication of GB578482A publication Critical patent/GB578482A/en
Expired legal-status Critical Current

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
    • C08J11/20—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 by treatment with hydrocarbons or halogenated hydrocarbons
    • 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)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Vulcanized synthetic rubber-like materials of the type produced by the polymerization of butadiene, its homologues or substituted derivatives, either alone or together with styrene or acrylonitrile, are plasticised by being mechanically disintegrated, treated with a mixture of a softening agent, a plasticiser having a mercapto grouping and an organic acid of the aromatic group and then converted to a coherent sheet by mechanical working between rolls. The synthetic rubber is first reduced sufficiently to pass a 20 mesh per inch sieve by passing through grinding rolls having a high friction ratio (e.g. 5 : 1) and is then added to a warm mixture consisting of 2-20 per cent of a softener such as pine tar, pine oil, a coumarone resin, naphthenic acid or a salt thereof such as zinc or iron naphthenate, 1/2 -5 per cent of an organic acid of the aromatic group such as salicylic acid, benzoic acid, o-, m- or p-nitrobenzoic acids, a dinitrobenzoic acid or a halogen substituted benzoic acid, with the addition of 1/4 -2 per cent of a plasticising agent containing the mercapto group such as mercaptobenzthiazole or a - or b -naphthyl mercaptan, and thoroughly stirring till a uniform mix is obtained. The mixture is then allowed to stand for 2-3 days at ordinary temperatures or for a shorter time at an elevated temperature and is then milled between rolls having a friction ratio of 1.2-3 : 1 till a coherent sheet is formed, the rolls being kept below 60 DEG C. at this stage by water cooling if necessary. The temperature is then raised to 90-100 DEG C. for a short period in order further to increase the plasticity. In a typical mix, 100 parts of synthetic rubber tyre tread crumb are added to a mixture of 10 parts coumarone resin, 3 parts benzoic acid and 1 part of mercaptobenzthiazole. The treated product may be used alone or with the addition of natural or synthetic rubber. Specification 558,334 is referred to. According to the Provisional Specification, the plasticiser may be omitted. Specification 564,514 is referred to in the Provisional Specification.
GB1018243A 1943-06-24 1943-06-24 Improvements in or relating to the regeneration of vulcanised synthetic rubber-like materials Expired GB578482A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1018243A GB578482A (en) 1943-06-24 1943-06-24 Improvements in or relating to the regeneration of vulcanised synthetic rubber-like materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1018243A GB578482A (en) 1943-06-24 1943-06-24 Improvements in or relating to the regeneration of vulcanised synthetic rubber-like materials

Publications (1)

Publication Number Publication Date
GB578482A true GB578482A (en) 1946-07-01

Family

ID=9963063

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1018243A Expired GB578482A (en) 1943-06-24 1943-06-24 Improvements in or relating to the regeneration of vulcanised synthetic rubber-like materials

Country Status (1)

Country Link
GB (1) GB578482A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2522069A (en) * 1948-10-23 1950-09-12 Gates Rubber Co Process for reclaiming mixed vulcanizates of natural and synthetic polymers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2522069A (en) * 1948-10-23 1950-09-12 Gates Rubber Co Process for reclaiming mixed vulcanizates of natural and synthetic polymers

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