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GB747997A - Reclaiming of vulcanized scrap natural and/or synthetic rubber - Google Patents

Reclaiming of vulcanized scrap natural and/or synthetic rubber

Info

Publication number
GB747997A
GB747997A GB2659854A GB2659854A GB747997A GB 747997 A GB747997 A GB 747997A GB 2659854 A GB2659854 A GB 2659854A GB 2659854 A GB2659854 A GB 2659854A GB 747997 A GB747997 A GB 747997A
Authority
GB
United Kingdom
Prior art keywords
per cent
natural
devulcanizing
scrap
synthetic 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
Application number
GB2659854A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2659854A priority Critical patent/GB747997A/en
Publication of GB747997A publication Critical patent/GB747997A/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
    • C08J11/22—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 organic oxygen-containing compounds
    • 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)

Abstract

A reclaimed natural and/or synthetic rubber having reduced staining properties is prepared by devulcanizing scrap vulcanized natural and/or synthetic rubber and treating the scrap before, during, or after devulcanizing with a compound selected from formaldehyde, paraformaldehyde, acetaldehyde, acrolein, chloral, aldol, methylol, or paraldehyde. In one example tyre scrap containing about 40 per cent GR-S and 60 per cent natural rubber is mixed with non-staining rubber softening oils (terpenes and mineral spirits), non-staining plasticizer (pine-products-gum and wood rosin), calcium chloride, and water, the mixture heated and agitated in an autoclave at about 200 lbs./sq. inch and at about 388 DEG F., and 37 per cent aqueous formaldehyde added and the mixture heated in the digester for a further hour at 388 DEG F. Alternatively the 37 per cent aqueous formaldehyde is added to the initial mixture or at intervals throughout the five hour devulcanizing period. Other examples are described illustrating the use of the other treating compounds referred to above in aqueous solution or in an organic solvent such as acetone, carbon tetrachloride, mineral spirits, benzene, or a terpene.
GB2659854A 1954-09-14 1954-09-14 Reclaiming of vulcanized scrap natural and/or synthetic rubber Expired GB747997A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2659854A GB747997A (en) 1954-09-14 1954-09-14 Reclaiming of vulcanized scrap natural and/or synthetic rubber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2659854A GB747997A (en) 1954-09-14 1954-09-14 Reclaiming of vulcanized scrap natural and/or synthetic rubber

Publications (1)

Publication Number Publication Date
GB747997A true GB747997A (en) 1956-04-18

Family

ID=10246140

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2659854A Expired GB747997A (en) 1954-09-14 1954-09-14 Reclaiming of vulcanized scrap natural and/or synthetic rubber

Country Status (1)

Country Link
GB (1) GB747997A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1218715B (en) * 1959-09-09 1966-06-08 Semperit Ag Process for the production of non-discoloring reclaimed rubber
DE1239462B (en) * 1958-06-20 1967-04-27 Us Rubber Co Process for the production of moldable rubber-containing synthetic resins

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1239462B (en) * 1958-06-20 1967-04-27 Us Rubber Co Process for the production of moldable rubber-containing synthetic resins
DE1218715B (en) * 1959-09-09 1966-06-08 Semperit Ag Process for the production of non-discoloring reclaimed rubber

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