JPS5723636A - Preparation of heat insulating material with waste material of rigid polyurethane roam - Google Patents

Preparation of heat insulating material with waste material of rigid polyurethane roam

Info

Publication number
JPS5723636A
JPS5723636A JP8712080A JP8712080A JPS5723636A JP S5723636 A JPS5723636 A JP S5723636A JP 8712080 A JP8712080 A JP 8712080A JP 8712080 A JP8712080 A JP 8712080A JP S5723636 A JPS5723636 A JP S5723636A
Authority
JP
Japan
Prior art keywords
rigid polyurethane
prepolymer
waste material
heat insulating
cured
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
JP8712080A
Other languages
Japanese (ja)
Inventor
Genjiro Hattori
Yukio Kokubo
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.)
OKAZAKI URETHANE KOGYO KK
Inoac Corp
Original Assignee
OKAZAKI URETHANE KOGYO KK
Inoue MTP KK
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 OKAZAKI URETHANE KOGYO KK, Inoue MTP KK filed Critical OKAZAKI URETHANE KOGYO KK
Priority to JP8712080A priority Critical patent/JPS5723636A/en
Publication of JPS5723636A publication Critical patent/JPS5723636A/en
Pending legal-status Critical Current

Links

Landscapes

  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

PURPOSE: To obtain the titled heat insulating mateial, having a strength not inferior to that of a urethane foam, and usable for building, by mixing a prepolymer containing free isocyanate with a crushed waste material of rigid polyurethane foam, etc., and reacting and curing the prepolymer with superheated steam.
CONSTITUTION: A waste material of rigid polyurethane foam is pulverized or cut to a chiplike waste material having a diameter of about 20mmϕ or less. 100prs.wt resultant material is then mixed with 5W30pts.wt solution prepared by adding a solvent, e.g. an aromatic hydrocarbon, to a prepolymer for a rigid polyurethane containing 1W48% free isocyanate obtained by reacting 100pts.wt polyol with 50W300pts.wt isocyanate to reduce the viscosity of the prepolymer as a binder by the spray coating, etc. The resultant mixture is then compressed in a mold, reacted and cured by injecting supreheated steam of vapor pressure 0.6W7.5kg/cm2 for 30sec-10min thereinto. Hot air at 60W150°C is then blown on the cured material for 10W30min to evaporate the absorbed water and dry the cured material.
COPYRIGHT: (C)1982,JPO&Japio
JP8712080A 1980-06-26 1980-06-26 Preparation of heat insulating material with waste material of rigid polyurethane roam Pending JPS5723636A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8712080A JPS5723636A (en) 1980-06-26 1980-06-26 Preparation of heat insulating material with waste material of rigid polyurethane roam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8712080A JPS5723636A (en) 1980-06-26 1980-06-26 Preparation of heat insulating material with waste material of rigid polyurethane roam

Publications (1)

Publication Number Publication Date
JPS5723636A true JPS5723636A (en) 1982-02-06

Family

ID=13906089

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8712080A Pending JPS5723636A (en) 1980-06-26 1980-06-26 Preparation of heat insulating material with waste material of rigid polyurethane roam

Country Status (1)

Country Link
JP (1) JPS5723636A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63136912U (en) * 1987-02-28 1988-09-08
US5525278A (en) * 1992-03-30 1996-06-11 Hecker Und Krosch Gmbh & Co. Kg Recycling process and apparatus for rigid polyurethane foam
WO2004052608A1 (en) * 2002-12-10 2004-06-24 Collins & Aikman Products Co. Acoustic articles utilizing isocyanate binders and methods of making same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4944085A (en) * 1972-09-02 1974-04-25
JPS5228576A (en) * 1975-08-29 1977-03-03 Toyo Rubber Chemical Ind Co Process for regenerating disposed hard foamed urethane

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4944085A (en) * 1972-09-02 1974-04-25
JPS5228576A (en) * 1975-08-29 1977-03-03 Toyo Rubber Chemical Ind Co Process for regenerating disposed hard foamed urethane

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63136912U (en) * 1987-02-28 1988-09-08
US5525278A (en) * 1992-03-30 1996-06-11 Hecker Und Krosch Gmbh & Co. Kg Recycling process and apparatus for rigid polyurethane foam
WO2004052608A1 (en) * 2002-12-10 2004-06-24 Collins & Aikman Products Co. Acoustic articles utilizing isocyanate binders and methods of making same

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