AT288017B - Verfahren und Vorrichtung zum Abbau von hochmolekularem Polyisobutylen in Schneckenmaschinen - Google Patents

Verfahren und Vorrichtung zum Abbau von hochmolekularem Polyisobutylen in Schneckenmaschinen

Info

Publication number
AT288017B
AT288017B AT405069A AT405069A AT288017B AT 288017 B AT288017 B AT 288017B AT 405069 A AT405069 A AT 405069A AT 405069 A AT405069 A AT 405069A AT 288017 B AT288017 B AT 288017B
Authority
AT
Austria
Prior art keywords
degradation
molecular weight
high molecular
weight polyisobutylene
screw machines
Prior art date
Application number
AT405069A
Other languages
English (en)
Original Assignee
Basf 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
Priority claimed from DE19681770295 external-priority patent/DE1770295C/de
Application filed by Basf Ag filed Critical Basf Ag
Application granted granted Critical
Publication of AT288017B publication Critical patent/AT288017B/de

Links

Classifications

    • 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
    • B29C48/76—Venting, drying means; Degassing means
    • 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
    • B29C48/25—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
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • 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
    • B29C48/505—Screws
    • B29C48/63—Screws having sections without mixing elements or threads, i.e. having cylinder shaped sections
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/875—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling for achieving a non-uniform temperature distribution, e.g. using barrels having both cooling and heating zones

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
AT405069A 1968-04-27 1969-04-25 Verfahren und Vorrichtung zum Abbau von hochmolekularem Polyisobutylen in Schneckenmaschinen AT288017B (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681770295 DE1770295C (de) 1968-04-27 Verfahren zum Abbau von hochmolekularem Polyisobutylen in Schneckenmaschinen

Publications (1)

Publication Number Publication Date
AT288017B true AT288017B (de) 1971-02-25

Family

ID=5700462

Family Applications (1)

Application Number Title Priority Date Filing Date
AT405069A AT288017B (de) 1968-04-27 1969-04-25 Verfahren und Vorrichtung zum Abbau von hochmolekularem Polyisobutylen in Schneckenmaschinen

Country Status (5)

Country Link
US (1) US3634381A (de)
AT (1) AT288017B (de)
BE (1) BE732092A (de)
FR (1) FR2007125A1 (de)
GB (1) GB1257042A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3638970A (en) * 1968-02-12 1972-02-01 Becker Drilling Alberta Ltd Joint for double-walled drill pipe

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4632977A (en) * 1984-06-01 1986-12-30 The Hygenic Corporation Method of plasticizing thermoplastic polymers
US4766200A (en) * 1984-06-01 1988-08-23 The Hygenic Corporation Process for improving the melt flow index of thermoplastic polymers
US4966952A (en) * 1984-06-01 1990-10-30 The Hygenic Corporation Thermoplastic polymer composition comprising trans 1,4-polyisoprene
US4614772A (en) * 1984-10-29 1986-09-30 Polysar Limited Low molecular weight polymer process
CA1257050A (en) * 1984-10-29 1989-07-04 Douglas C. Edwards Low molecular weight polymer process
US4882407A (en) * 1986-12-23 1989-11-21 The Hygenic Corporation Thermoplastic endodontic composition having improved melt flow index
DE3932019C1 (de) * 1989-09-26 1991-05-08 Bayer Ag, 5090 Leverkusen, De
US5262489A (en) * 1990-08-23 1993-11-16 White Donald A Process for producing low molecular weight isoolefin polymers
US5283318A (en) * 1991-12-20 1994-02-01 Exxon Research And Engineering Company Process for depolymerization of butyl rubbers and halobutyl rubbers using hot liquid water
US5286423A (en) * 1992-05-29 1994-02-15 Johnson William B Method of heat treating gutta percha based material to improve the characteristics thereof
US5539033A (en) * 1992-11-06 1996-07-23 Minnesota Mining And Manufacturing Company Solventless compounding and coating of non-thermoplastic hydrocarbon elastomers
USRE36855E (en) * 1992-11-06 2000-09-05 3M Innovative Properties Company Solventless compounding and coating of non-thermoplastic hydrocarbon elastomers
CA2147507C (en) * 1992-11-06 2003-07-29 Timothy D. Bredahl Solventless compounding and coating of non-thermoplastic hydrocarbon elastomers
US5975440A (en) * 1995-04-21 1999-11-02 Watson; William Ferguson Mixing
GB2300129B (en) * 1995-04-21 1999-06-02 William Ferguson Watson Mixing
DE19806609A1 (de) * 1998-02-18 1999-08-19 Beiersdorf Ag Verfahren zur kontinuierlichen, lösungsmittel- und mastikationsfreien Herstellung von druckempfindlichen Selbstklebemassen auf Basis von nicht-thermoplastischen Elastomeren sowie deren Beschichtung zur Herstellung von selbstklebenden Artikeln
US6060584A (en) * 1998-05-13 2000-05-09 Eastman Chemical Company Process for the degradation of polyolefins
US6380316B1 (en) 1999-03-02 2002-04-30 Dow Corning Corporation Polyisobutylene copolymers having reactive silyl grafts
US6433133B1 (en) 1999-11-16 2002-08-13 Eastman Chemical Company Process for reducing the weight average molecular weight and melt index ratio of polyethylenes and polyethylene products
US6420485B1 (en) 2000-08-14 2002-07-16 Dow Corning Corporation Siloxane-grafted hydrocarbon copolymers
US20070191242A1 (en) * 2004-09-17 2007-08-16 Sanjay Srinivasan Viscosity modifiers for lubricant compositions
WO2011011318A1 (en) * 2009-07-21 2011-01-27 Mylan, Inc. Process for the continuous manufacture of a polyisobutylene based transdermal patch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3638970A (en) * 1968-02-12 1972-02-01 Becker Drilling Alberta Ltd Joint for double-walled drill pipe

Also Published As

Publication number Publication date
BE732092A (de) 1969-10-27
DE1770295B2 (de) 1972-12-21
FR2007125A1 (de) 1970-01-02
US3634381A (en) 1972-01-11
GB1257042A (de) 1971-12-15
DE1770295A1 (de) 1972-02-03

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Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee