Title:
METHOD FOR PRODUCING POLYISOCYANATE
Document Type and Number:
WIPO Patent Application WO/2010/004818
Kind Code:
A1
Abstract:
Disclosed is a method for producing a polyisocyanate, which comprises: a polyamination step wherein an aromatic polyamine represented by general formula (I) is obtained by polyamination in an acidic ionic liquid using aniline and an aldehyde compound selected from formaldehyde and paraformaldehydes as raw materials; a phosgenation step wherein a phosgenated reaction product containing a first isocyanate is obtained by phosgenation of the aromatic polyamine and phosgene; and a mixing step wherein a polyisocyanate is obtained by mixing a hydrogen chloride-containing isocyanate, which contains a second isocyanate and hydrogen chloride, with the phosgenated reaction product. (In formula (I), q represents 0 or an integer of not less than 1.)
Inventors:
MASUDA TAKAHIRO (JP)
Application Number:
PCT/JP2009/060277
Publication Date:
January 14, 2010
Filing Date:
June 04, 2009
Export Citation:
Assignee:
NIPPON POLYURETHANE KOGYO KK (JP)
MASUDA TAKAHIRO (JP)
MASUDA TAKAHIRO (JP)
International Classes:
C07C263/10; C07C265/14; C08G12/40
Domestic Patent References:
| WO2005028446A1 | 2005-03-31 |
Foreign References:
| JP2003522748A | 2003-07-29 | |||
| JP2004300085A | 2004-10-28 | |||
| JP2005521722A | 2005-07-21 | |||
| JP2005521750A | 2005-07-21 | |||
| JP2008518990A | 2008-06-05 | |||
| JP2005247694A | 2005-09-15 | |||
| JP2005298404A | 2005-10-27 | |||
| JPH06234724A | 1994-08-23 | |||
| JPH07233136A | 1995-09-05 |
Attorney, Agent or Firm:
HASEGAWA, Yoshiki et al. (JP)
Yoshiki Hasegawa (JP)
Yoshiki Hasegawa (JP)
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