GB1197437A - Stabilisation of Isocyanates - Google Patents
Stabilisation of IsocyanatesInfo
- Publication number
- GB1197437A GB1197437A GB4262166A GB4262166A GB1197437A GB 1197437 A GB1197437 A GB 1197437A GB 4262166 A GB4262166 A GB 4262166A GB 4262166 A GB4262166 A GB 4262166A GB 1197437 A GB1197437 A GB 1197437A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bis
- isocyanates
- butyl
- radical
- free
- 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)
- Polyurethanes Or Polyureas (AREA)
Abstract
1,197,437. Stabilizing isocyanates. IMPERIAL CHEMICAL INDUSTRIES Ltd. 15 Sept., 1967 [23 Sept., 1966], No. 42621/66. Heading C2C. Organic isocyanates are stabilized by distilling in presence of an organic free-radical capture agent (i.e. a compound reacting with a free-radical to give a more stable free-radical) other than guiacol. Specified isocyanates are phenyl, alpha-naphthyl, octadecyl, chlorophenyl (o-, m-, p-), butyl and cyclohexyl isocyanates; hexamethylene, phenylene, tolylene (2,4- and 2,6), diphenylmethane (4,4<SP>1</SP>), chlorophenylene (2,4), naphthylene (1,5), diphenylene (4,4<SP>1</SP>), 3,3<SP>1</SP>-dimethyldiphenylene (4,4<SP>1</SP>), 3-methyldiphenylmethane (4,4<SP>1</SP>), diphenyl ether, cyclohexane (1,4- and 1,3-), 1-methylcyclohexane (2,4- and 2,6) and methylene bis-(cyclohexyl) diisocyanates; toluene (2,4,6-) and diphenyl ether (2,4,4<SP>1</SP>) triisocyanates. Specified freeradical capture agents are 2,4-dimethyl-6- (alpha-methylcyclohexyl) phenol, 4-tertiarybutylcatechol, propyl gallate, diphenylamine, 4- isopropylaminodiphenylamine, phenothiazine, 2,2,6,6 - tetramethylpiperid - 4 - ore, 1,1- diphenyl - 2 - (2<SP>1</SP>,4<SP>1</SP>,6<SP>1</SP>- trinitrophenyl)- hydrazine, 9,10-dihydroanthracene, 9,9<SP>1</SP>-bis- (fluorenylidene), omega-[4<SP>1</SP>-hydroxy-3<SP>1</SP>,3<SP>1</SP>-di. (tert-butyl) phenyl]-2,6-di-(tert-butyl)-benzoquinone - 4 - methide, 9,91 - bis - (anthronylidene), 9,9<SP>1</SP> - bis - (anthronylidene)ethane, thiocarbanilide, bis - (2 - benzthiazolyl) disulphide, benzthiazolyl - 2 - cyclohexylsulphenamide, bis - (2 - benzimideazolyl) - disulphide, zinc thiobenzoate aid zinc dimethyldithiocarbamate. Tolylene diisocyanate stabilized in this manner may be catalytically trimerized (in ester solvent using metal salt+ phenol) more rapidly than unstabilized starting material, giving the isocyanurate.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4262166A GB1197437A (en) | 1966-09-23 | 1966-09-23 | Stabilisation of Isocyanates |
DE19671668275 DE1668275A1 (en) | 1966-09-23 | 1967-09-21 | Process for the stabilization of organic isocyanates |
NL6712882A NL6712882A (en) | 1966-09-23 | 1967-09-21 | |
FR121936A FR1537546A (en) | 1966-09-23 | 1967-09-22 | Process for stabilizing organic isocyanates |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4262166A GB1197437A (en) | 1966-09-23 | 1966-09-23 | Stabilisation of Isocyanates |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1197437A true GB1197437A (en) | 1970-07-01 |
Family
ID=10425248
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4262166A Expired GB1197437A (en) | 1966-09-23 | 1966-09-23 | Stabilisation of Isocyanates |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1668275A1 (en) |
GB (1) | GB1197437A (en) |
NL (1) | NL6712882A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5175349A (en) * | 1990-03-07 | 1992-12-29 | Bayer Aktiengesellschaft | Stabilization of organic polyisocyanates |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19813136C1 (en) * | 1998-03-25 | 1999-07-15 | Bayer Ag | 3,5-Di-tert-butyl-4-hydroxyphenylpropionic acid esters |
-
1966
- 1966-09-23 GB GB4262166A patent/GB1197437A/en not_active Expired
-
1967
- 1967-09-21 NL NL6712882A patent/NL6712882A/xx unknown
- 1967-09-21 DE DE19671668275 patent/DE1668275A1/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5175349A (en) * | 1990-03-07 | 1992-12-29 | Bayer Aktiengesellschaft | Stabilization of organic polyisocyanates |
Also Published As
Publication number | Publication date |
---|---|
NL6712882A (en) | 1968-03-25 |
DE1668275A1 (en) | 1971-09-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |