GB1043082A - A method of controllably thermally degrading thermoplastics - Google Patents

A method of controllably thermally degrading thermoplastics

Info

Publication number
GB1043082A
GB1043082A GB819/64A GB81964A GB1043082A GB 1043082 A GB1043082 A GB 1043082A GB 819/64 A GB819/64 A GB 819/64A GB 81964 A GB81964 A GB 81964A GB 1043082 A GB1043082 A GB 1043082A
Authority
GB
United Kingdom
Prior art keywords
free
radical
peroxide
thermoplastics
butyl
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
GB819/64A
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.)
Huels AG
Original Assignee
Chemische Werke Huels AG
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 Chemische Werke Huels AG filed Critical Chemische Werke Huels AG
Publication of GB1043082A publication Critical patent/GB1043082A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F8/00—Chemical modification by after-treatment
    • C08F8/50—Partial depolymerisation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/10—Thermosetting resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2301/00—Use of unspecified macromolecular compounds as reinforcement
    • B29K2301/10—Thermosetting resins

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

A polymer of a mono-olefin is depolymerized by mixing the powdered, cold-compacted, sintered or molten polymer with a free-radical-producing compound selected from organic peroxides, azo compounds, and per acids or salts thereof, and then heating the mixture at above the decomposit on temperature of the free-radical-forming compound. In examples, di-t-butyl peroxide, lauryl peroxide, benzoyl peroxide, potassium persulphate and azodiisobutyric dinitrile are used as free-radical compounds. Optional features are: depolymerization in stages, the use of catalysts such as ferrous sulphate, and the addition of stabilizers (e.g. dilauryl thiodipropionate, calcium stearate, 2,6 - di - t - butyl - 4 - methylphenol or N-stearoyl-p-aminophenol).
GB819/64A 1963-01-09 1964-01-08 A method of controllably thermally degrading thermoplastics Expired GB1043082A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC0028868 1963-01-09

Publications (1)

Publication Number Publication Date
GB1043082A true GB1043082A (en) 1966-09-21

Family

ID=7018777

Family Applications (1)

Application Number Title Priority Date Filing Date
GB819/64A Expired GB1043082A (en) 1963-01-09 1964-01-08 A method of controllably thermally degrading thermoplastics

Country Status (3)

Country Link
DE (1) DE1495275B2 (en)
GB (1) GB1043082A (en)
NL (1) NL298986A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0079687A2 (en) * 1981-10-23 1983-05-25 Asahi Kasei Kogyo Kabushiki Kaisha Improved linear medium or low-density polyethylene composition
FR2519007A1 (en) * 1981-12-24 1983-07-01 Charbonnages Ste Chimique MODIFIED COPOLYMERS OF ETHYLENE AND AT LEAST ONE A-OLEFIN AND PROCESS FOR THEIR PREPARATION
EP0185434A2 (en) * 1984-12-19 1986-06-25 Shell Internationale Researchmaatschappij B.V. Controlled cracking of alpha-olefin polymers
US4897452A (en) * 1987-04-07 1990-01-30 Bp Chemicals Limited Process for the manufacture of propylene homopolymer or copolymer pellets
CN1313501C (en) * 2002-07-03 2007-05-02 埃克森美孚化学专利公司 Oxygen tailoring of polyethylene film resins
WO2013093364A1 (en) * 2011-12-22 2013-06-27 Compagnie Plastic Omnium Method for producing a polymer composition having controlled flow

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2827764C2 (en) * 1978-06-24 1988-01-21 Hoechst Ag, 6230 Frankfurt Process for the production of a polypropylene suitable for sealable films
EP0131323A1 (en) * 1983-07-11 1985-01-16 Akzo N.V. Process for the degradation of (co)polymers of propylene
DE3642266A1 (en) * 1986-12-11 1987-04-23 Rauer Kurt DEGRADATION OF POLYETHYLENE BY MEANS OF RADICAL IMAGES
DE3742845C2 (en) * 1987-12-17 1996-07-11 Danubia Petrochem Deutschland Process for the production of fiber-reinforced polypropylene webs and fiber-reinforced polypropylene webs
AT403581B (en) * 1993-06-07 1998-03-25 Danubia Petrochem Polymere METHOD FOR PRODUCING NEW POLYPROPYLENE BY CHEMICAL DEGRADING
DE4334922C2 (en) * 1993-10-13 1995-08-24 Rieter Automatik Gmbh Process for the production of fibers from polyolefins
DE19854285A1 (en) 1998-11-25 2000-05-31 Targor Gmbh Process for the peroxidic treatment of olefin polymers

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0079687A2 (en) * 1981-10-23 1983-05-25 Asahi Kasei Kogyo Kabushiki Kaisha Improved linear medium or low-density polyethylene composition
EP0079687A3 (en) * 1981-10-23 1985-03-27 Asahi Kasei Kogyo Kabushiki Kaisha Improved linear medium or low-density polyethylene composition
FR2519007A1 (en) * 1981-12-24 1983-07-01 Charbonnages Ste Chimique MODIFIED COPOLYMERS OF ETHYLENE AND AT LEAST ONE A-OLEFIN AND PROCESS FOR THEIR PREPARATION
EP0083521A1 (en) * 1981-12-24 1983-07-13 Ecp-Enichem Polymeres France S.A. Modified copolymers of ethylene and at least one alpha-olefin, and process for their prepraration
US4486579A (en) * 1981-12-24 1984-12-04 Societe Chimique Des Charbonnages Modified copolymers of ethylene and α-olefins and a process for their preparation
AU568288B2 (en) * 1981-12-24 1987-12-24 Societe Chimique Des Charbonnages S.A. Production of ethylene copolymers
EP0185434A3 (en) * 1984-12-19 1986-12-10 Shell Internationale Research Maatschappij B.V. Controlled cracking of alpha-olefin polymers
EP0185434A2 (en) * 1984-12-19 1986-06-25 Shell Internationale Researchmaatschappij B.V. Controlled cracking of alpha-olefin polymers
AU577432B2 (en) * 1984-12-19 1988-09-22 Montell Technology Company B.V. Controlled degradation of polypropylene using peroxides
US4897452A (en) * 1987-04-07 1990-01-30 Bp Chemicals Limited Process for the manufacture of propylene homopolymer or copolymer pellets
CN1313501C (en) * 2002-07-03 2007-05-02 埃克森美孚化学专利公司 Oxygen tailoring of polyethylene film resins
WO2013093364A1 (en) * 2011-12-22 2013-06-27 Compagnie Plastic Omnium Method for producing a polymer composition having controlled flow
FR2984894A1 (en) * 2011-12-22 2013-06-28 Plastic Omnium Cie PROCESS FOR PRODUCING A CONTROLLED FLUIDITE POLYMER COMPOSITION
CN104349884A (en) * 2011-12-22 2015-02-11 全耐塑料公司 Method for producing a polymer composition having controlled flow
CN104349884B (en) * 2011-12-22 2017-10-03 全耐塑料公司 The manufacture method of based on the polymer, composition that mobility is controlled

Also Published As

Publication number Publication date
DE1495275B2 (en) 1973-03-22
NL298986A (en) 1900-01-01
DE1495275A1 (en) 1969-03-13

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