JPS5772839A - Production of rigid foamed polyurethane - Google Patents

Production of rigid foamed polyurethane

Info

Publication number
JPS5772839A
JPS5772839A JP55149570A JP14957080A JPS5772839A JP S5772839 A JPS5772839 A JP S5772839A JP 55149570 A JP55149570 A JP 55149570A JP 14957080 A JP14957080 A JP 14957080A JP S5772839 A JPS5772839 A JP S5772839A
Authority
JP
Japan
Prior art keywords
pressure
foaming
discharged
low
raw liquid
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.)
Granted
Application number
JP55149570A
Other languages
Japanese (ja)
Other versions
JPS6340651B2 (en
Inventor
Takeshi Yanagisawa
Yoshiyuki Onuma
Hiroyuki Suzuki
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.)
KOUKOKU KAGAKU KOGYO KK
Achilles Corp
Original Assignee
KOUKOKU KAGAKU KOGYO KK
Achilles Corp
Kohkoku Chemical Industry Co Ltd
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 KOUKOKU KAGAKU KOGYO KK, Achilles Corp, Kohkoku Chemical Industry Co Ltd filed Critical KOUKOKU KAGAKU KOGYO KK
Priority to JP55149570A priority Critical patent/JPS5772839A/en
Publication of JPS5772839A publication Critical patent/JPS5772839A/en
Publication of JPS6340651B2 publication Critical patent/JPS6340651B2/ja
Granted legal-status Critical Current

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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/08—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles using several expanding or moulding steps

Abstract

PURPOSE:To produce a rigid foamed polyurethane having a low foaming pressure and excellent in mechanical strength and heat-insulating property by a method wherein the foam density of a raw liquid discharged in the form of foams is set to be 0.08g/cm<3> or below, and the expansion ratio achieved after the discharging is set to be 2 times or below. CONSTITUTION:An isocianate component and a polyol component, which contains a catalyst for reaction, a foam controlling agent and the like mixed thereto, are contained respectively in pressure-resistant containers. A foaming agent which is a low-boiling compound and is a gas at ordinary temperature and ordinary pressure (e.g., dichlorodifluoromethane) is supplied in its liquid state into a pipe line extended from each of the containers, in such a manner that the foam density of the raw liquid to be discharged into a mold is adjusted at 0.08g/cm<3> or below. Then, the raw liquid prepared by mixing the two components to each other is discharged into the mold, is foamed at a secondary expansion ratio of 2 times or below and is hardened. The secondary foaming is induced by water which is normally contained in the polyol on in amount of about 0;05%. Since the foaming pressure is low, there is no need for special reinforcing materials and the operation is facilitated.
JP55149570A 1980-10-25 1980-10-25 Production of rigid foamed polyurethane Granted JPS5772839A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55149570A JPS5772839A (en) 1980-10-25 1980-10-25 Production of rigid foamed polyurethane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55149570A JPS5772839A (en) 1980-10-25 1980-10-25 Production of rigid foamed polyurethane

Publications (2)

Publication Number Publication Date
JPS5772839A true JPS5772839A (en) 1982-05-07
JPS6340651B2 JPS6340651B2 (en) 1988-08-12

Family

ID=15478068

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55149570A Granted JPS5772839A (en) 1980-10-25 1980-10-25 Production of rigid foamed polyurethane

Country Status (1)

Country Link
JP (1) JPS5772839A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02158312A (en) * 1988-12-10 1990-06-18 Achilles Corp Manufacture of hard polyurethane foam
JPH11131615A (en) * 1997-10-28 1999-05-18 Achilles Corp Heat insulating wall structure of building

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02158312A (en) * 1988-12-10 1990-06-18 Achilles Corp Manufacture of hard polyurethane foam
JPH0622814B2 (en) * 1988-12-10 1994-03-30 アキレス株式会社 Method for producing rigid polyurethane foam
JPH11131615A (en) * 1997-10-28 1999-05-18 Achilles Corp Heat insulating wall structure of building

Also Published As

Publication number Publication date
JPS6340651B2 (en) 1988-08-12

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