JPS5681331A - Polyisocyanate composition - Google Patents

Polyisocyanate composition

Info

Publication number
JPS5681331A
JPS5681331A JP15742179A JP15742179A JPS5681331A JP S5681331 A JPS5681331 A JP S5681331A JP 15742179 A JP15742179 A JP 15742179A JP 15742179 A JP15742179 A JP 15742179A JP S5681331 A JPS5681331 A JP S5681331A
Authority
JP
Japan
Prior art keywords
reaction
groups
polymethylenepolyphenyl
polyisocyanate
prepared
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
JP15742179A
Other languages
Japanese (ja)
Other versions
JPS6345377B2 (en
Inventor
Koichi Takeuchi
Masao Iwasaki
Teruo Muraishi
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.)
Mitsui Toatsu Chemicals Inc
Original Assignee
Mitsui Toatsu Chemicals Inc
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 Mitsui Toatsu Chemicals Inc filed Critical Mitsui Toatsu Chemicals Inc
Priority to JP15742179A priority Critical patent/JPS5681331A/en
Priority to DE8080107578T priority patent/DE3065209D1/en
Priority to EP19800107578 priority patent/EP0030039B1/en
Publication of JPS5681331A publication Critical patent/JPS5681331A/en
Publication of JPS6345377B2 publication Critical patent/JPS6345377B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

PURPOSE: A modified polymethylenepolyphenyl polyisocyanate composition used in the production of low-density rigid urethane foams, prepared by forming carbamate groups by reaction with a lower alcohol.
CONSTITUTION: A modified polyisocyanate is prepared by adding dropwise a lower alcohol of about 1W4C to a polymethylenepolyphenyl polyisocyanate of the formula, wherein n≥1, with agitation in an inert atmosphere to react the components thereby to convert below 10% of the isocyanato groups into carbamate groups. With respect to the conditions for said reaction, for example, in case where a polymethylenepolyphenyl isocyanate containing 30% of isocyanato groups is used, it is preferred to conduct the reaction at about 25W80°C by using below about 2.3% based on the isocyanato groups, of methanol.
COPYRIGHT: (C)1981,JPO&Japio
JP15742179A 1979-12-04 1979-12-06 Polyisocyanate composition Granted JPS5681331A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP15742179A JPS5681331A (en) 1979-12-06 1979-12-06 Polyisocyanate composition
DE8080107578T DE3065209D1 (en) 1979-12-04 1980-12-04 Process for the preparation of polymethylene polypheny polyisocyanate compositions and use thereof
EP19800107578 EP0030039B1 (en) 1979-12-04 1980-12-04 Process for the preparation of polymethylene polypheny polyisocyanate compositions and use thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15742179A JPS5681331A (en) 1979-12-06 1979-12-06 Polyisocyanate composition

Publications (2)

Publication Number Publication Date
JPS5681331A true JPS5681331A (en) 1981-07-03
JPS6345377B2 JPS6345377B2 (en) 1988-09-09

Family

ID=15649257

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15742179A Granted JPS5681331A (en) 1979-12-04 1979-12-06 Polyisocyanate composition

Country Status (1)

Country Link
JP (1) JPS5681331A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57164115A (en) * 1981-03-30 1982-10-08 Asahi Oorin Kk Semiflexible foam polymer packaging

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5018597A (en) * 1972-09-26 1975-02-27
JPS50142541A (en) * 1974-04-03 1975-11-17

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5018597A (en) * 1972-09-26 1975-02-27
JPS50142541A (en) * 1974-04-03 1975-11-17

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57164115A (en) * 1981-03-30 1982-10-08 Asahi Oorin Kk Semiflexible foam polymer packaging

Also Published As

Publication number Publication date
JPS6345377B2 (en) 1988-09-09

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