GB1518815A - Reducing the molecular chain length of polymers by shear degradation - Google Patents

Reducing the molecular chain length of polymers by shear degradation

Info

Publication number
GB1518815A
GB1518815A GB28512/75A GB2851275A GB1518815A GB 1518815 A GB1518815 A GB 1518815A GB 28512/75 A GB28512/75 A GB 28512/75A GB 2851275 A GB2851275 A GB 2851275A GB 1518815 A GB1518815 A GB 1518815A
Authority
GB
United Kingdom
Prior art keywords
extruder
melt
shearing device
polymers
reducing
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
GB28512/75A
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Priority to GB28512/75A priority Critical patent/GB1518815A/en
Priority to JP51079082A priority patent/JPS529096A/en
Priority to DE19762630173 priority patent/DE2630173A1/en
Priority to FR7620450A priority patent/FR2317070A1/en
Publication of GB1518815A publication Critical patent/GB1518815A/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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/362—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using static mixing devices
    • 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/74—Bypassing means, i.e. part of the molten material being diverted into downstream stages of the extruder
    • 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
    • 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
    • B29C48/04—Particle-shaped
    • 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
    • B29C48/05—Filamentary, e.g. strands
    • 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
    • C08F2810/00—Chemical modification of a polymer
    • C08F2810/10—Chemical modification of a polymer including a reactive processing step which leads, inter alia, to morphological and/or rheological modifications, e.g. visbreaking

Landscapes

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

Abstract

1518815 Mixing apparatus SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV 7 July 1975 28512/75 Heading B1C [Also in Division B5] In a method of and apparatus for reducing the molecular chain length of polymers by shear degradation the polymer is fed to a worm screw extruder 25 to form a melt, removed from the extruder and passed through a narrow gap 13 between relatively rotating members 10, 12 of an independently driven shearing device in which shear stresses sufficient to degrade the melt are generated. In the apparatus shown a valve member 21 provides for alternative straight throughflow of materials in the extruder without use of the shearing device or for diversion of the melt thereto and return to the extruder section 24. Heating or cooling means may be provided in the shearing device for heat exchange with the materials flowing through the gap 13 the temperature of which may also be controlled by speed control of the rotor 10.
GB28512/75A 1975-07-07 1975-07-07 Reducing the molecular chain length of polymers by shear degradation Expired GB1518815A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB28512/75A GB1518815A (en) 1975-07-07 1975-07-07 Reducing the molecular chain length of polymers by shear degradation
JP51079082A JPS529096A (en) 1975-07-07 1976-07-05 Method for shortening polymer molecular chain lenght by shear focess reduction
DE19762630173 DE2630173A1 (en) 1975-07-07 1976-07-05 METHOD AND DEVICE FOR SHORTENING THE MOLECULE CHAINS IN POLYMERS
FR7620450A FR2317070A1 (en) 1975-07-07 1976-07-05 PROCESS AND APPARATUS FOR REDUCING THE LENGTH OF THE MOLECULAR CHAIN OF POLYMERS BY DEGRADATION BY SHEAR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB28512/75A GB1518815A (en) 1975-07-07 1975-07-07 Reducing the molecular chain length of polymers by shear degradation

Publications (1)

Publication Number Publication Date
GB1518815A true GB1518815A (en) 1978-07-26

Family

ID=10276819

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28512/75A Expired GB1518815A (en) 1975-07-07 1975-07-07 Reducing the molecular chain length of polymers by shear degradation

Country Status (4)

Country Link
JP (1) JPS529096A (en)
DE (1) DE2630173A1 (en)
FR (1) FR2317070A1 (en)
GB (1) GB1518815A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3615586C1 (en) * 1986-05-09 1987-05-07 Berstorff Gmbh Masch Hermann Extrusion device for the production of plastic melt mixtures
AT410075B (en) * 2000-12-11 2003-01-27 Cincinnati Extrusion Gmbh Melt supply to a mould, comprises deflecting a melt stream from its flow direction, and simultaneously reducing its cross section area
CA2583119A1 (en) * 2004-10-11 2006-04-20 Lanxess Inc. Continuous extrusion process for producing grafted polymers

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE696619A (en) * 1966-04-06 1967-10-05

Also Published As

Publication number Publication date
JPS529096A (en) 1977-01-24
FR2317070A1 (en) 1977-02-04
DE2630173A1 (en) 1977-01-27
FR2317070B1 (en) 1978-09-01

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee