EP 0308710 A1 19890329 - Liquid carbodiimide-uretonimine-modified polyphenylene polyisocyanates and polyurethane foams made therefrom.
Title (en)
Liquid carbodiimide-uretonimine-modified polyphenylene polyisocyanates and polyurethane foams made therefrom.
Title (de)
Flüssige Carbodiimid-Uretonimin-modifizierte Polyphenylen-Polyisocyanate sowie die daraus hergestellten Polyurethan-Schaumstoffe.
Title (fr)
Polyphénylène-polyisocyanates liquides modifiés par des groupes carbodiimide-urétonimine et mousses de polyuréthane préparées à partir de ceux-ci.
Publication
Application
Priority
US 9568087 A 19870914
Abstract (en)
A process for the preparation of liquid polymethylene polyphenylene polyisocyanate blends containing carbodiimide-uretonimine isocyanate linkages, containing a high two-ring methylene bis(phenylisocyanate) content, and light colored polyurethane foams made therefrom. The process is comprised of reacting polymethylene polyphenylene polyisocyanate with a catalytically effective amount of a carbodiimide-uretonimine promoting compound at a temperature sufficient to promote the formation of carbodiimide-uretonimine linkages and an isocyanate content of about 25 percent and the desired viscosity is reached, and then reacting that product to deactivate the carbodiimide-uretonimine catalyst, and finally blending two ring methylene bis(phenylisocyanate) with the product to produce a mixture having a two ring isocyanate content of about 60 percent of the total ring content and a viscosity comparable to standard polymeric MDI. Urethane foams made from this material are lighter in color than those formed from standard polymeric MDI.
IPC 1-7
C07C 119/055; C07D 229/00; C08G 18/14; C08G 18/72; C08G 18/79
IPC 8 full level
C08G 18/79 (2006.01)
CPC (source: EP US)
C08G 18/797 (2013.01 - EP US)
Citation (search report)
- [X] EP 0189156 A2 19860730 - BASF CORP [US]
- [A] EP 0193787 A2 19860910 - BASF CORP [US]
- [A] DE 2742275 A1 19780323 - ICI LTD
- [AD] US 4284730 A 19810818 - NARAYAN THIRUMURTI, et al
- [A] GB 2114976 A 19830901 - BASF WYANDOTTE CORP
Designated contracting state (EPC)
BE DE FR GB IT
DOCDB simple family (publication)
US 4743626 A 19880510; CA 1333202 C 19941122; EP 0308710 A1 19890329; MX 166032 B 19921216
DOCDB simple family (application)
US 9568087 A 19870914; CA 576393 A 19880902; EP 88114416 A 19880903; MX 1300588 A 19880913