GB1114690A - Stabilisation process - Google Patents
Stabilisation processInfo
- Publication number
- GB1114690A GB1114690A GB2358066A GB2358066A GB1114690A GB 1114690 A GB1114690 A GB 1114690A GB 2358066 A GB2358066 A GB 2358066A GB 2358066 A GB2358066 A GB 2358066A GB 1114690 A GB1114690 A GB 1114690A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diisocyanate
- solvents
- diisocyanates
- esters
- triisocyanatotoluene
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C263/00—Preparation of derivatives of isocyanic acid
- C07C263/18—Separation; Purification; Stabilisation; Use of additives
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Crude aromatic polyisocyanates are stabilized by heating their solutions in refluxing inert organic solvents under reduced pressure for 3-24 hours. Preferred solvents are monochlorobenzene and orthodichlorobenzene, but other solvents are, e.g., toluene, xylene, esters and carbamate esters. Specified isocyanates are tolylene-2,4- and 2,6-diisocyanates, 4,41-diphenylmethane diisocyanate, m- and p-phenylene diisocyanates, diphenylene-4,41-diisocyanate, 4,41-diisocyanato-3,31-dimethyldiphenylmethane, chlorophenylene - 2,4 - diisocyanate, 2,4,6-triisocyanatotoluene and the phosgenation product of the polyamine mixture obtained by acid condensation of aniline with CH2O.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2358066A GB1114690A (en) | 1966-05-26 | 1966-05-26 | Stabilisation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2358066A GB1114690A (en) | 1966-05-26 | 1966-05-26 | Stabilisation process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1114690A true GB1114690A (en) | 1968-05-22 |
Family
ID=10197979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2358066A Expired GB1114690A (en) | 1966-05-26 | 1966-05-26 | Stabilisation process |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1114690A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0497538A2 (en) * | 1991-01-28 | 1992-08-05 | The Dow Chemical Company | Process for reducing hydrolyzable chloride in toluene diisocyanate |
| US7038002B2 (en) | 2003-07-25 | 2006-05-02 | Bayer Materialscience Ag | Production of mixtures of diisocyanates and polyisocyanates from the diphenylmethane series with high contents of 4,4′-methylenediphenyl diisocyanate and 2,4′-methylenediphenyl diisocyanate |
-
1966
- 1966-05-26 GB GB2358066A patent/GB1114690A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0497538A2 (en) * | 1991-01-28 | 1992-08-05 | The Dow Chemical Company | Process for reducing hydrolyzable chloride in toluene diisocyanate |
| EP0497538A3 (en) * | 1991-01-28 | 1993-01-13 | The Dow Chemical Company | Process for reducing hydrolyzable chloride in toluene diisocyanate |
| US7038002B2 (en) | 2003-07-25 | 2006-05-02 | Bayer Materialscience Ag | Production of mixtures of diisocyanates and polyisocyanates from the diphenylmethane series with high contents of 4,4′-methylenediphenyl diisocyanate and 2,4′-methylenediphenyl diisocyanate |
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