NL7215795A - - Google Patents
Info
- Publication number
- NL7215795A NL7215795A NL7215795A NL7215795A NL7215795A NL 7215795 A NL7215795 A NL 7215795A NL 7215795 A NL7215795 A NL 7215795A NL 7215795 A NL7215795 A NL 7215795A NL 7215795 A NL7215795 A NL 7215795A
- Authority
- NL
- Netherlands
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
- C07C263/20—Separation; Purification
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5549771A GB1384065A (en) | 1971-11-30 | 1971-11-30 | Process for the purification of organic isocyanates |
Publications (1)
Publication Number | Publication Date |
---|---|
NL7215795A true NL7215795A (en) | 1973-06-04 |
Family
ID=10474102
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL7215795A NL7215795A (en) | 1971-11-30 | 1972-11-22 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS4862737A (en) |
AU (1) | AU4904072A (en) |
GB (1) | GB1384065A (en) |
NL (1) | NL7215795A (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5337852B2 (en) * | 1974-06-04 | 1978-10-12 | ||
DE2631168B2 (en) * | 1976-07-10 | 1979-03-08 | Bayer Ag, 5090 Leverkusen | Process for the preparation of diisocyanatodiphenylmethane isomers with an adjusted content of chlorine compounds |
JP2875877B2 (en) * | 1990-10-23 | 1999-03-31 | 三井化学株式会社 | Method for producing methylene-crosslinked polyphenylene polyisocyanate |
US5185384A (en) * | 1991-01-28 | 1993-02-09 | The Dow Chemical Company | Method for reducing hydrolyzable chloride in toluene diisocyanate |
BR9200378A (en) * | 1991-01-28 | 1992-10-13 | Dow Chemical Co | PROCESS FOR THE PREPARATION OF REACTIVE DIESOCIANATE TOLUENE DISTILLATION SUPPORTS AND STABLE VISCOSITY AND DIISOCIANATE TOLUENE HAVING REDUCED HYDROLYSABLE CHLORIDE LEVELS |
DE19914292A1 (en) | 1999-03-30 | 2000-10-05 | Bayer Ag | Reduction of the chorine content of low molecular isocyanates comprises reaction with a tertiary or quaternary amine group containing anion exchanger for ten minutes at less than two hundred degrees |
DE19914291A1 (en) | 1999-03-30 | 2000-10-05 | Bayer Ag | Process for the purification of a low molecular isocyanate, comprises addition of an oligomeric organic polyphosphate compound and heating for ten minutes below two hundred degrees |
DE19922572A1 (en) | 1999-05-17 | 2000-11-23 | Bayer Ag | Process for the purification of organic isocyanates, the organic isocyanates thus purified and their use |
US9505711B2 (en) * | 2010-11-17 | 2016-11-29 | Basf Se | Method for purifying mixtures comprising 4,4′-methylenediphenyl diisocyanate |
US20120123153A1 (en) * | 2010-11-17 | 2012-05-17 | Basf Se | Method for purifying mixtures comprising 4,4'-methylenediphenyl diisocyanate |
EP3250622B1 (en) | 2015-01-30 | 2018-11-07 | Basf Se | Polyphenylene polymethylene polyisocyanates with low by-products |
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1971
- 1971-11-30 GB GB5549771A patent/GB1384065A/en not_active Expired
-
1972
- 1972-11-20 AU AU49040/72A patent/AU4904072A/en not_active Expired
- 1972-11-22 NL NL7215795A patent/NL7215795A/xx not_active Application Discontinuation
- 1972-11-30 JP JP12029472A patent/JPS4862737A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
AU4904072A (en) | 1974-05-23 |
JPS4862737A (en) | 1973-09-01 |
GB1384065A (en) | 1975-02-19 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
BV | The patent application has lapsed |