JPS5581851A - Preparation of polymethylene polyphenyl polycarbamate - Google Patents
Preparation of polymethylene polyphenyl polycarbamateInfo
- Publication number
- JPS5581851A JPS5581851A JP15414378A JP15414378A JPS5581851A JP S5581851 A JPS5581851 A JP S5581851A JP 15414378 A JP15414378 A JP 15414378A JP 15414378 A JP15414378 A JP 15414378A JP S5581851 A JPS5581851 A JP S5581851A
- Authority
- JP
- Japan
- Prior art keywords
- solution
- polymethylene polyphenyl
- formaldehyde
- polyphenyl polycarbamate
- aqueous
- 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)
- Phenolic Resins Or Amino Resins (AREA)
Abstract
PURPOSE: To prepare a polymethylene polyphenyl polycarbamate without pollution problems, by reacting an N-phenylcarbamate with formaldehyde in the presence of an aqueous acid solution while separating and recovering said solution.
CONSTITUTION: An N-phenylcarbamate I (R1 is 1W6C lower alkyl or cycloalkyl; R2 is H, halogen, 1W6C lower alkyl or alkoxy; n is 1W4) is reacted with formaldehyde or a formaldehyde-producing compound in the presence of an acid catalyst to give a polymethylene polyphenyl polycarbamate II (m is 0 or 1W5). The reaction is carried out in the presence of an aqueous acid solution and the solution is separated and recovered from the product and reused. Since the product and the aqueous solution easily separate into two layers after the reaction, the recovery of the acid is easy and the aqueous solution maintains the catalytic activity.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15414378A JPS5581851A (en) | 1978-12-15 | 1978-12-15 | Preparation of polymethylene polyphenyl polycarbamate |
IT27992/79A IT1126563B (en) | 1978-12-14 | 1979-12-07 | PROCESS FOR PREPARING POLIMETILEN POLIFENIL POLICARBAMMATI |
GB7942809A GB2044252B (en) | 1978-12-14 | 1979-12-12 | Process for preparing polymethylene polyphenyl polycarbamates |
NLAANVRAGE7908982,A NL185077C (en) | 1978-12-14 | 1979-12-13 | PROCESS FOR PREPARING A POLYMETHYLENE POLYPHENYL POLYCARBAMATE |
CA000341827A CA1120051A (en) | 1978-12-14 | 1979-12-13 | Process for preparing polymethylene polyphenyl polycarbamates |
FR7930757A FR2444057B1 (en) | 1978-12-14 | 1979-12-14 | PROCESS FOR THE PREPARATION OF POLYMETHYLENE POLYPHENYL POLYCARBAMATES |
DE2950386A DE2950386C2 (en) | 1978-12-14 | 1979-12-14 | Process for the preparation of polymethylene polyphenyl polycarbamates |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15414378A JPS5581851A (en) | 1978-12-15 | 1978-12-15 | Preparation of polymethylene polyphenyl polycarbamate |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5581851A true JPS5581851A (en) | 1980-06-20 |
JPS5757030B2 JPS5757030B2 (en) | 1982-12-02 |
Family
ID=15577809
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15414378A Granted JPS5581851A (en) | 1978-12-14 | 1978-12-15 | Preparation of polymethylene polyphenyl polycarbamate |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5581851A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5770855A (en) * | 1980-10-17 | 1982-05-01 | Asahi Chem Ind Co Ltd | Preparation of methylene-bis-(4-phenylcarbamic acid ester) |
JPS59153962U (en) * | 1983-03-31 | 1984-10-16 | 三菱重工業株式会社 | folding machine |
-
1978
- 1978-12-15 JP JP15414378A patent/JPS5581851A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5770855A (en) * | 1980-10-17 | 1982-05-01 | Asahi Chem Ind Co Ltd | Preparation of methylene-bis-(4-phenylcarbamic acid ester) |
JPS6125705B2 (en) * | 1980-10-17 | 1986-06-17 | Asahi Chemical Ind | |
JPS59153962U (en) * | 1983-03-31 | 1984-10-16 | 三菱重工業株式会社 | folding machine |
Also Published As
Publication number | Publication date |
---|---|
JPS5757030B2 (en) | 1982-12-02 |
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