Title:
ジフェニルメタンジイソシアネート及びポリフェニルポリメチレンポリイソシアネートを含み、塩素化副生物含有量及びヨウ素色数が共に低減された混合物の製造方法
Document Type and Number:
Japanese Patent JP4583596
Kind Code:
B2
Abstract:
In a process for preparing mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced content of chlorinated by-products and a reduced iodine color number by two-stage reaction of the corresponding mixtures of diphenylmethanediamines and polyphenylpolymethylenepolyamines with phosgene in the presence of at least one inert organic solvent at elevated temperature, separation of the excess phosgene and solvent after the phosgenation is complete and thermal treatment of the reaction product, the mass ratios of phosgene to hydrogen chloride in the residence time apparatus of the second stage of the phosgenation are at the same time 10-30:1 in the liquid phase and 1-10:1 in the gas phase.
Inventors:
Penzell, Ulrich
Shall, Volker
Stalosta, Dieter
Bezel, Hilmar
Streffer, Eckhart
Pfe finger, yoahim
Frank, Poplov
Dosh, Jurgen
Schwarz, Hans, Volkmar
Neumann, Fritz
Van den abert, peter
Jacobs, Yang
Nefyans, Philip
Van Pee, Willie
Shall, Volker
Stalosta, Dieter
Bezel, Hilmar
Streffer, Eckhart
Pfe finger, yoahim
Frank, Poplov
Dosh, Jurgen
Schwarz, Hans, Volkmar
Neumann, Fritz
Van den abert, peter
Jacobs, Yang
Nefyans, Philip
Van Pee, Willie
Application Number:
JP2000544630A
Publication Date:
November 17, 2010
Filing Date:
April 12, 1999
Export Citation:
Assignee:
BASF SE
International Classes:
C07C263/10; C07C263/20; C07C265/14
Domestic Patent References:
| JP7233136A | ||||
| JP7316122A | ||||
| JP4211641A | ||||
| JP9100263A |
Attorney, Agent or Firm:
Satoshi Eto