DE2628785A1 - Soft polyurethane cold-foam prodn. from a polyol and an isocyanate - by metering the reactants, after pressurising, into a mixing chamber and discharging for foaming - Google Patents

Soft polyurethane cold-foam prodn. from a polyol and an isocyanate - by metering the reactants, after pressurising, into a mixing chamber and discharging for foaming

Info

Publication number
DE2628785A1
DE2628785A1 DE19762628785 DE2628785A DE2628785A1 DE 2628785 A1 DE2628785 A1 DE 2628785A1 DE 19762628785 DE19762628785 DE 19762628785 DE 2628785 A DE2628785 A DE 2628785A DE 2628785 A1 DE2628785 A1 DE 2628785A1
Authority
DE
Grant status
Application
Patent type
Prior art keywords
chamber
mixing
foam
polyol
metering
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.)
Pending
Application number
DE19762628785
Other languages
German (de)
Inventor
Guenter Keller
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.)
Chem Fab Ludwigsburg Zeh & Co
Chemische Fabrik Ludwigsburg Zeh & Co
Knecht Filterwerk GmbH
Original Assignee
Chem Fab Ludwigsburg Zeh & Co
Chemische Fabrik Ludwigsburg Zeh & Co
Knecht Filterwerk GmbH
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

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00Mixing; Kneading
    • B29B7/74Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/7404Mixing devices specially adapted for foamable substances
    • B29B7/7409Mixing devices specially adapted for foamable substances with supply of gas
    • B29B7/7428Methodical aspects
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G
    • C08J2375/00Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04Polyurethanes

Abstract

Polyurethane cold-foam, esp. soft foam, is mfd. by metering a polyol and an isocyanate, under normal press., into a mixing chamber where the reactants are compounded by a rotary stirrer. The resulting mixt. is discharged from the mixing chamber for subsequent foaming. Specifically, the polyol component is mixed with a gas under super-pressure before the metering step and then metered, together with the gas, into the mixing chamber. Both reactants are mixed together at less than 2000 rpm. Frequent regular, cleaning of the equipment used, is unnecessary, without risk of impairment of the quality of the resulting foam.
DE19762628785 1976-06-26 1976-06-26 Soft polyurethane cold-foam prodn. from a polyol and an isocyanate - by metering the reactants, after pressurising, into a mixing chamber and discharging for foaming Pending DE2628785A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19762628785 DE2628785A1 (en) 1976-06-26 1976-06-26 Soft polyurethane cold-foam prodn. from a polyol and an isocyanate - by metering the reactants, after pressurising, into a mixing chamber and discharging for foaming

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762628785 DE2628785A1 (en) 1976-06-26 1976-06-26 Soft polyurethane cold-foam prodn. from a polyol and an isocyanate - by metering the reactants, after pressurising, into a mixing chamber and discharging for foaming

Publications (1)

Publication Number Publication Date
DE2628785A1 true true DE2628785A1 (en) 1977-12-29

Family

ID=5981532

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19762628785 Pending DE2628785A1 (en) 1976-06-26 1976-06-26 Soft polyurethane cold-foam prodn. from a polyol and an isocyanate - by metering the reactants, after pressurising, into a mixing chamber and discharging for foaming

Country Status (1)

Country Link
DE (1) DE2628785A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0353061A2 (en) * 1988-07-29 1990-01-31 Pmc, Inc. Blowing agents for polyurethane foam
EP0378243A2 (en) * 1989-01-13 1990-07-18 Sealed Air Corporation Method for producing polyurethane foam and apparatus therefor
US5118720A (en) * 1989-01-13 1992-06-02 Sealed Air Corporation Method for producing polyurethane foam and apparatus therefor
EP0566044A1 (en) * 1992-04-13 1993-10-20 Linde Aktiengesellschaft Blowing agent combination for foaming a reaction mixture
EP0719627A2 (en) 1994-12-27 1996-07-03 MASCHINENFABRIK HENNECKE GmbH Process and device for producing foam using carbon dioxide dissolved under pressure
EP0722975A1 (en) 1994-11-28 1996-07-24 Bayer Ag Method for dissolving carbon dioxide in a liquid polymer
US5840778A (en) * 1994-11-28 1998-11-24 Bayer Aktiengesellschaft Process and device for producing foam using carbon dioxide dissolved under pressure
DE10151855A1 (en) * 2001-10-24 2003-05-15 Hennecke Gmbh A process for the production of polyurethane foam
WO2013182467A1 (en) * 2012-06-06 2013-12-12 Henkel Ag & Co. Kgaa Foaming device

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4906672A (en) * 1988-07-29 1990-03-06 Pmc, Inc. Blowing agents for polyurethane foam
EP0353061A3 (en) * 1988-07-29 1990-11-28 Pmc, Inc. Blowing agents for polyurethane foam
EP0353061A2 (en) * 1988-07-29 1990-01-31 Pmc, Inc. Blowing agents for polyurethane foam
EP0378243A2 (en) * 1989-01-13 1990-07-18 Sealed Air Corporation Method for producing polyurethane foam and apparatus therefor
EP0378243A3 (en) * 1989-01-13 1991-07-10 Sealed Air Corporation Method for producing polyurethane foam and apparatus therefor
US5118720A (en) * 1989-01-13 1992-06-02 Sealed Air Corporation Method for producing polyurethane foam and apparatus therefor
EP0566044A1 (en) * 1992-04-13 1993-10-20 Linde Aktiengesellschaft Blowing agent combination for foaming a reaction mixture
US5840778A (en) * 1994-11-28 1998-11-24 Bayer Aktiengesellschaft Process and device for producing foam using carbon dioxide dissolved under pressure
US6689325B2 (en) 1994-11-28 2004-02-10 Bayer Aktiengesellschaft Process and device for producing foam using carbon dioxide dissolved under pressure
EP0722975A1 (en) 1994-11-28 1996-07-24 Bayer Ag Method for dissolving carbon dioxide in a liquid polymer
DE4442256C1 (en) * 1994-11-28 1996-07-25 Hennecke Gmbh Maschf A method for dissolving carbon dioxide in a liquid polymer
US5833930A (en) * 1994-12-27 1998-11-10 Maschinenfabrik Hennecke Gmbh Apparatus for foam manufacturing using carbon dioxide dissolved under pressure
US5643970A (en) * 1994-12-27 1997-07-01 Maschinenfabrik Hennecke Gmbh Method and apparatus for foam manufacture using carbon dioxide dissolved under pressure
EP0719627A2 (en) 1994-12-27 1996-07-03 MASCHINENFABRIK HENNECKE GmbH Process and device for producing foam using carbon dioxide dissolved under pressure
DE10151855A1 (en) * 2001-10-24 2003-05-15 Hennecke Gmbh A process for the production of polyurethane foam
DE10151855C2 (en) * 2001-10-24 2003-11-20 Hennecke Gmbh A process for the production of polyurethane foam
WO2013182467A1 (en) * 2012-06-06 2013-12-12 Henkel Ag & Co. Kgaa Foaming device
US9687795B2 (en) 2012-06-06 2017-06-27 Henkel Ag & Co. Kgaa Foaming device

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