IE38767B1 - Process for the production of polyurethane elastomers - Google Patents

Process for the production of polyurethane elastomers

Info

Publication number
IE38767B1
IE38767B1 IE109/74A IE10974A IE38767B1 IE 38767 B1 IE38767 B1 IE 38767B1 IE 109/74 A IE109/74 A IE 109/74A IE 10974 A IE10974 A IE 10974A IE 38767 B1 IE38767 B1 IE 38767B1
Authority
IE
Ireland
Prior art keywords
molecular weight
screw
end product
polyurethane elastomers
kneading
Prior art date
Application number
IE109/74A
Other versions
IE38767L (en
Original Assignee
Bayer 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 Bayer Ag filed Critical Bayer Ag
Publication of IE38767L publication Critical patent/IE38767L/en
Publication of IE38767B1 publication Critical patent/IE38767B1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/0895—Manufacture of polymers by continuous processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/18—Stationary reactors having moving elements inside
    • B01J19/20—Stationary reactors having moving elements inside in the form of helices, e.g. screw reactors
    • 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
    • B29C48/40—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 using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B29C48/405—Intermeshing co-rotating screws
    • 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
    • B29C48/535—Screws with thread pitch varying along the longitudinal axis
    • 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
    • B29C48/57—Screws provided with kneading disc-like elements, e.g. with oval-shaped elements
    • 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
    • B29C48/94—Lubricating
    • B29C48/95—Lubricating by adding lubricant to the moulding material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/0838—Manufacture of polymers in the presence of non-reactive compounds

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

Polyurethane elastomers made from diisocyanates, polyhydroxyl compounds (molecular weight 800-3500), glycols (molecular weight up to 300) and optionally triols (molecular weight up to 500) are produced in screw machines in the presence of lubricants. Self-cleaning, twin-screw machines with corotating screw shafts are used. In one screw zone therein, in which the kneading elements mix vigorously (kneading frequency up to 15 Hz), the critical reaction phase, in which the reaction mixture is highly tacky and has a viscosity of between 20 and 70 Pa.s, is passed through at a velocity gradient in the radial play between the comb and the housing wall of greater than 2000 s<-1>. The consequence of this is a homogeneous knot-free end product. The process enables the thermoplastic end product to be extruded directly with shaping. [GB1403693A]
IE109/74A 1973-01-19 1974-01-18 Process for the production of polyurethane elastomers IE38767B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2302564A DE2302564C3 (en) 1973-01-19 1973-01-19 Process for the production of polyurethane elastomers

Publications (2)

Publication Number Publication Date
IE38767L IE38767L (en) 1974-07-19
IE38767B1 true IE38767B1 (en) 1978-05-24

Family

ID=5869412

Family Applications (1)

Application Number Title Priority Date Filing Date
IE109/74A IE38767B1 (en) 1973-01-19 1974-01-18 Process for the production of polyurethane elastomers

Country Status (18)

Country Link
JP (1) JPS565244B2 (en)
AT (1) AT332124B (en)
AU (1) AU473836B2 (en)
BE (1) BE809904A (en)
BR (1) BR7400337D0 (en)
CA (1) CA1026491A (en)
CH (1) CH616439A5 (en)
DD (1) DD110287A5 (en)
DE (1) DE2302564C3 (en)
DK (1) DK137134C (en)
ES (1) ES422407A1 (en)
FR (1) FR2214719B1 (en)
GB (1) GB1403693A (en)
IE (1) IE38767B1 (en)
IT (1) IT1002693B (en)
LU (1) LU69188A1 (en)
NL (1) NL167980C (en)
SE (1) SE412402B (en)

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2549372C2 (en) * 1975-11-04 1984-08-09 Bayer Ag, 5090 Leverkusen Process for the continuous production of polyurethane elastomers
DE2610980B2 (en) * 1976-03-16 1978-01-12 Basf Ag, 6700 Ludwigshafen PROCESS FOR THE CONTINUOUS MANUFACTURING OF THERMOPLASTIC POLYURETHANE ELASTOMERS
DE2842806A1 (en) * 1978-09-30 1980-04-10 Bayer Ag METHOD FOR PRODUCING POLYURETHANE ELASTOMERS
DE2925944A1 (en) 1979-06-27 1981-01-22 Bayer Ag METHOD FOR PRODUCING POLYURETHANE UREAS
IT1132527B (en) * 1979-07-13 1986-07-02 Buss Ag PROCEDURE AND DEVICE FOR THE CONTINUOUS PRODUCTION OF POLYURETHANE
US4409167A (en) * 1981-01-13 1983-10-11 E. I. Du Pont De Nemours & Co, Process for extruding a modified high molecular weight poly(ethylene terephthalate) resin
JPS5890442U (en) * 1981-12-11 1983-06-18 富士電機株式会社 reading device
IT8221688V0 (en) * 1982-04-26 1982-04-26 Pomini Farrel Spa CONTINUOUS MIXING MACHINE PERFECTED FOR PLASTIC MATERIALS, AND IN PARTICULAR FOR RUBBER POWDER AND "IN DIVIDED FORM".
JPS6296515A (en) * 1985-05-13 1987-05-06 Polyplastics Co Continuous production of polymer of copolymer of trioxane
DE3831706A1 (en) * 1988-09-17 1990-03-22 Bayer Ag MEMBRANE FOR SPEAKERS
GB2229131A (en) * 1989-03-17 1990-09-19 Vactite Ltd Coating electric conductors
US5158725A (en) * 1991-04-29 1992-10-27 The Goodyear Tire & Rubber Company Continuous mixing of elastomeric compounds
JP2878841B2 (en) * 1991-07-03 1999-04-05 鐘紡株式会社 Thermoplastic polyurethane elastic body, method for producing the same, and elastic fiber comprising the same
DE4426943A1 (en) 1994-07-29 1996-02-01 Bayer Ag Polyurethane molding compounds
DE4437586A1 (en) 1994-10-20 1996-04-25 Basf Schwarzheide Gmbh Process for the preparation of thermoplastic polyurethanes
DE19520730A1 (en) * 1995-06-07 1996-12-12 Bayer Ag Thermoplastic polyurethane urea elastomers
DE19823393A1 (en) 1998-05-26 1999-12-02 Basf Ag Prepolymers containing isocyanate groups and process for their preparation
GB0019074D0 (en) * 2000-08-03 2000-09-27 Ranier Ltd Precision polyurethane manufacture
DE10138298A1 (en) 2001-08-10 2003-02-27 Basf Ag Thermoplastic polyurethanes
DE102005004967A1 (en) 2005-02-03 2006-08-10 Basf Ag Process for the continuous production of thermoplastically processable polyurethane elastomers
DE102005008260A1 (en) 2005-02-22 2006-08-24 Basf Ag Article comprising polyurethane and polystyrene, useful e.g. as sealed coverings and housings, free of chemical adhesive, bonded by plasma treatment of the polystyrene surface
DE102005039933B4 (en) 2005-08-24 2007-12-27 Bayer Materialscience Ag Process for the preparation of thermoplastically processable polyurethanes
DE102008023252A1 (en) 2008-05-13 2009-11-19 Tesa Se Hotmelt process for producing a chemically crosslinked polyurethane film
DE102009046657A1 (en) 2009-11-12 2011-05-19 Tesa Se Pressure-sensitive adhesive based on polyurethane
WO2014057057A1 (en) * 2012-10-10 2014-04-17 Basf Se Catching device made of thermoplastic polyurethane
GB201309458D0 (en) * 2013-05-27 2013-07-10 Queens University Of The Belfast Process for the Preparation of a Metal-Organic Compound
DE102013021027A1 (en) 2013-12-17 2015-06-18 Carl Freudenberg Kg Thermoplastic polyurethane for sealing applications
EP3827048A1 (en) 2018-07-25 2021-06-02 Covestro Intellectual Property GmbH & Co. KG Polymer blends containing thermoplastic and cross-linked reaction product from polyaddition or polycondensation
EP3838960A1 (en) 2019-12-17 2021-06-23 Covestro Deutschland AG Method for adjusting molecular weight distribution in polycondensation and / or polyaddition
EP4077451A1 (en) 2019-12-17 2022-10-26 Covestro Intellectual Property GmbH & Co. KG Method for adjusting the molecular weight distribution in polycondensations and/or polyadditions

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB856708A (en) * 1958-10-09 1960-12-21 Union Carbide Corp Method and apparatus for mixing materials forming viscous masses
BE759829A (en) * 1969-12-03 1971-06-03 Upjohn Co PREPARATION OF POLYURETHANES
DE1964834A1 (en) * 1969-12-24 1971-07-01 Bayer Ag Polyurethane elastomers mfr by direct reac - tion in extruder

Also Published As

Publication number Publication date
ATA36674A (en) 1975-12-15
CH616439A5 (en) 1980-03-31
DE2302564A1 (en) 1974-07-25
AU473836B2 (en) 1976-07-01
FR2214719B1 (en) 1977-09-23
JPS565244B2 (en) 1981-02-04
NL7400585A (en) 1974-07-23
DK137134C (en) 1978-07-03
NL167980B (en) 1981-09-16
SE412402B (en) 1980-03-03
DD110287A5 (en) 1974-12-12
AT332124B (en) 1976-09-10
BE809904A (en) 1974-07-18
ES422407A1 (en) 1976-04-16
IE38767L (en) 1974-07-19
LU69188A1 (en) 1974-08-19
CA1026491A (en) 1978-02-14
IT1002693B (en) 1976-05-20
GB1403693A (en) 1975-08-28
BR7400337D0 (en) 1974-08-22
DK137134B (en) 1978-01-23
AU6447974A (en) 1975-07-17
FR2214719A1 (en) 1974-08-19
DE2302564B2 (en) 1978-10-26
JPS49109497A (en) 1974-10-17
NL167980C (en) 1985-03-18
DE2302564C3 (en) 1985-02-07

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