JPS5681331A - Polyisocyanate composition - Google Patents
Polyisocyanate compositionInfo
- 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
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
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15742179A JPS5681331A (en) | 1979-12-06 | 1979-12-06 | Polyisocyanate composition |
EP19800107578 EP0030039B1 (en) | 1979-12-04 | 1980-12-04 | Process for the preparation of polymethylene polypheny polyisocyanate compositions and use thereof |
DE8080107578T DE3065209D1 (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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5018597A (en) * | 1972-09-26 | 1975-02-27 | ||
JPS50142541A (en) * | 1974-04-03 | 1975-11-17 |
-
1979
- 1979-12-06 JP JP15742179A patent/JPS5681331A/en active Granted
Patent Citations (2)
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)
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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