Abstract:
This application relates to a novel process for producing imidoisocyanates by reacting an anhydride of a polycarboxylic acid and an aromatic polyisocyanate in the presence of a catalyst combination consisting of a certain phosphorus or boron compound and a dialkyl sulfoxide. In a preferred embodiment of this invention (when the anhydride is a halogenated anhydride), the imido isocyanates are novel compositions of matter which are useful as components of polyurethane-forming formulations that can be cured by conventional amine and tin catalysts to produce flame-resistant polyurethane foams.
Abstract:
1374135 Oxyalkylated compounds UNION CARBIDE CORP 15 Aug 1972 [16 Aug 1971] 37971/72 Heading C2C The invention comprises an oxyalkylated 3- cyclohexene-1, 1-dimethanol and an oxyalkylated 3,4-dibromocyclohexane-1, 1-dimethanol wherein the oxyalkylene units have at least two carbon atoms per unit. The compounds are prepared by reacting 3-cyclohexene-1,1-dimethanol with an alkylene oxide and subsequently brominating the product if desired.