GB535531A - Improvements relating to processes of regeneration of vulcanised rubber - Google Patents

Improvements relating to processes of regeneration of vulcanised rubber

Info

Publication number
GB535531A
GB535531A GB626640A GB626640A GB535531A GB 535531 A GB535531 A GB 535531A GB 626640 A GB626640 A GB 626640A GB 626640 A GB626640 A GB 626640A GB 535531 A GB535531 A GB 535531A
Authority
GB
United Kingdom
Prior art keywords
rubber
solvent
swelling
agent
april
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
GB626640A
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.)
Pirelli and C SpA
Original Assignee
Pirelli SpA
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 Pirelli SpA filed Critical Pirelli SpA
Publication of GB535531A publication Critical patent/GB535531A/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
    • 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)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

535,531. Devulcanizing rubber. SOC. ITALIANA PIRELLI. April 6, 1940, No. 6266. Convention date, April 27, 1939. [Class 70] Vulcanized rubber is de-vulcanized by subjecting it in divided condition to the action of a rubber solvent or swelling agent at atmospheric temperature or not above 50‹C. for sufficient time to obtain a swelling only of the rubber, then heating the swollen rubber in the presence of a de-vulcanizing agent under superatmospheric pressure. The de-vulcanizing agent is removed and the solvent washed out preferably after drying the rubber. Solvents or swelling agents include middle and heavy mineral oils, high boiling point aliphatic hydrocarbons, wood tar and wood tar oils, coal tar and coal tar oils, resin oil and hydrogenated naphthalene. The solvent may be removed by aliphatic alcohols, alkylacetates and acetone. The devulcanizing agent may be water, or a solution of caustic alkali, alkali sulphide, sulphite or hyposulphite. An example is given using naphtha as solvent.
GB626640A 1939-04-27 1940-04-06 Improvements relating to processes of regeneration of vulcanised rubber Expired GB535531A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT535531X 1939-04-27

Publications (1)

Publication Number Publication Date
GB535531A true GB535531A (en) 1941-04-11

Family

ID=11283625

Family Applications (1)

Application Number Title Priority Date Filing Date
GB626640A Expired GB535531A (en) 1939-04-27 1940-04-06 Improvements relating to processes of regeneration of vulcanised rubber

Country Status (3)

Country Link
BE (1) BE438709A (en)
FR (1) FR865077A (en)
GB (1) GB535531A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0608157A1 (en) * 1993-01-22 1994-07-27 OLIVEIRA DA CUNHA LIMA, Luiz Carlos Fast process to reclaim cured or semi-cured rubber
US10087301B2 (en) * 2015-07-10 2018-10-02 Rubreco Inc. Dewatering devulcanized rubber
EP4116336A1 (en) * 2021-07-09 2023-01-11 The Goodyear Tire & Rubber Company Rubber product devulcanization method and product

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0608157A1 (en) * 1993-01-22 1994-07-27 OLIVEIRA DA CUNHA LIMA, Luiz Carlos Fast process to reclaim cured or semi-cured rubber
US10087301B2 (en) * 2015-07-10 2018-10-02 Rubreco Inc. Dewatering devulcanized rubber
EP4116336A1 (en) * 2021-07-09 2023-01-11 The Goodyear Tire & Rubber Company Rubber product devulcanization method and product

Also Published As

Publication number Publication date
FR865077A (en) 1941-05-13
BE438709A (en) 1900-01-01

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