GB1288937A - - Google Patents
Info
- Publication number
- GB1288937A GB1288937A GB1288937DA GB1288937A GB 1288937 A GB1288937 A GB 1288937A GB 1288937D A GB1288937D A GB 1288937DA GB 1288937 A GB1288937 A GB 1288937A
- Authority
- GB
- United Kingdom
- Prior art keywords
- methylene bridged
- polyaryl amines
- polyaryl
- amines
- triehloroacetic
- 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.)
- Expired
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1288937 Methylene bridged polyaryl amines IMPERIAL CHEMICAL INDUSTRIES Ltd 5 May 1970 [9 June 1969] 29092/69 Heading C2C Methylene bridged polyaryl amines are prepared by condensing a primary arylamine and formaldehyde at elevated temperature in the presence of a strong organic carboxylic acid of pKa value less than 1À5 such as oxalic, trifluoroacetic, triehloroacetic, dichloroacetic, difluoroacetic and heptafluorbutyric acids. A neutral metallic salt, e.g. a halide of an alkali or alkaline earth metal may also be present and the reactants may be heated at a pressure above atmospheric and the process carried out in a continuous manner. Reference has been directed by the Comptroller to Specification 1,177,557
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2909269 | 1969-06-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1288937A true GB1288937A (en) | 1972-09-13 |
Family
ID=10286015
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1288937D Expired GB1288937A (en) | 1969-06-09 | 1969-06-09 |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2027057A1 (en) |
GB (1) | GB1288937A (en) |
NL (1) | NL7008365A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6031136A (en) * | 1993-07-21 | 2000-02-29 | Bayer Corporation | Process for preparing methylene diphenylamines by partial neutralization of acidic methylene diphenylamines |
-
1969
- 1969-06-09 GB GB1288937D patent/GB1288937A/en not_active Expired
-
1970
- 1970-06-02 DE DE19702027057 patent/DE2027057A1/en active Pending
- 1970-06-09 NL NL7008365A patent/NL7008365A/xx unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6031136A (en) * | 1993-07-21 | 2000-02-29 | Bayer Corporation | Process for preparing methylene diphenylamines by partial neutralization of acidic methylene diphenylamines |
Also Published As
Publication number | Publication date |
---|---|
NL7008365A (en) | 1970-12-11 |
DE2027057A1 (en) | 1970-12-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |