Process for preparing polycarbodiimide foams in the presence of

Details Process for preparing polycarbodiimide foams in the presence of Process for preparing polycarbodiimide foams in the presence of

1974-08-19

1976-01-06

Cockeram, H. S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25AB, 2604299, 2606065P, 260DIG24, C08G 1814, C08G 1816

Patent

active

039310590

ABSTRACT:
A compound adapted to be used to advantage as a catalyst for making carbodiimide foams is prepared by a process wherein
A. a phosphetane oxide or phosphetane sulphide of the general Formulae I and II: ##EQU1## wherein X represents a C.sub.1 -C.sub.18 alkyl, C.sub.2 -C.sub.18 alkenyl, C.sub.6 -C.sub.14 aryl, C.sub.7 -C.sub.20 aralkyl, C.sub.1 -C.sub.18 alkoxy or C.sub.6 -C.sub.14 aroxy group and
R.sup.1 to R.sup.6 represent hydrogen and/or C.sub.1 -C.sub.4 alkyl groups and is reacted with
B. a mono-, di- and/or polyhydric alcohol having a molecular weight of about 32 to about 250, a protonic acid which has a pH of between 1 and 8 in N/10 aqueous solution, a metal salt or an acid chloride.

REFERENCES:
patent: 3657161 (1972-04-01), Bernard et al.
patent: 3717596 (1973-02-01), Kan et al.
patent: 3723364 (1973-03-01), McLaughlin et al.
patent: 3723366 (1973-03-01), Kan
patent: 3728289 (1973-04-01), Reuter et al.
patent: 3746709 (1973-07-01), Patton et al.
patent: 3766103 (1973-10-01), Patton et al.

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