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1488096 Foamed carbodiimide and isocyanurate polymers BASF WYANDOTTE CORP 11 Feb 1975 [25 Feb 1974] 5807/75 Headings C3C C3R and C3P Foamed polymers containing carbodiimide and isocyanurate linkages are made by mixing an organic polyisocyanate at an initiating temperature with a catalytic amount of a catalyst comprising a tertiary amine trimerization catalyst and an amino alcohol of molecular wt. 98-300 and which contains 1-3 tertiary amino groups wherein each N atom is linked to at least one #-hydroxy-C 1-4 alkyl group. The condensation may be carried out in the presence of a polyol and also a fluorocarbon blowing agent. In the examples mixtures of 2,4- and 2,6-tolylene diisocyanate and/or a polymethylene polyphenylisocyanate were foamed in the presence as catalyst of 1,3,5-tris- (N,N - dimethylaminopropyl) - 8 - hexahydrotriazine or 2,4,6 - tris - (dimethylaminomethyl)- phenol with 1,3,5 - tris - (2 - hydroxyethyl) - shexahydrotriazine, triethanolamine, N - (2- hydroxyethyl)morpholine, N - (2 - hydroxyethyl)piperidine, N,N,N<SP>1</SP>,N<SP>1</SP> - tetrakis - (2- hydroxypropyl) - ethylenediamine, bis - 1- (2 - hydroxypropyl) - 2 - methyl - piperazine or N,N - dimethylaminoethanol and in the optional presence of monofluorotrichloromethane, a polyalkylsiloxane - polyoxyalkylene copolymer, tris - (2 - chloroethyl)- phosphate. In Examples 21--29 urethane linkages were also produced in the foamed polymers using dibutyltin dilaurate as a catalyst and polyols which were (i) a graft polymer made by polymerizing acrylonitrile in a polyol made from propylene oxide and the reaction product of maleic anhydride and a propylene oxide adduct of glycerine, and (ii) a propylene oxide adduct of a Mannich condensate of phenol, diethanolamine and formaldehyde.
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