Process of crosslinking polycyclic oligomer from tetraphenal

Details Process of crosslinking polycyclic oligomer from tetraphenal Process of crosslinking polycyclic oligomer from tetraphenal

1989-09-11

1990-11-20

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having a halogen atom or oxygen single bonded...

525462, 528204, 528370, 528377, 528378, 528379, C08G 6420

Patent

active

049720392

ABSTRACT:
Polycyclic polycarbonate (or thiol analog) oligomers are prepared from a mixture of at least one bishaloformate with at least one tetraphenol, or thio analogs thereof. Such mixture may also contain at least one dihydroxy or dimercapto compound. The oligomers are formed by the reaction of such mixtures with alkali metal hydroxides and various amines. The polycyclic oligomer mixtures may be converted to crosslinked polycarbonates or their thiol analogs.

REFERENCES:
patent: 2763672 (1956-09-01), Young et al.
patent: 2765343 (1956-10-01), Benton et al.
patent: 3716364 (1973-02-01), Gogola
patent: 4616077 (1986-10-01), Silva
patent: 4794160 (1988-12-01), Shannon et al.
patent: 4888411 (1989-12-01), Shannon et al.

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