Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1990-10-22
1992-07-21
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
423300, 525538, C08G 7902, C01B 2510
Patent
active
051323893
ABSTRACT:
The polycondensation disrupting effects of the impurities in an impure N-dichlorophosphoryltrichlorophosphazene, P.sub.2 NOCl.sub.5, or oligomer thereof, are avoided by polycondensing such impure P.sub.2 NOCl.sub.5 into a high molecular weight uncrosslinked poly(dichlorophosphazene) in the presence of an effective impurity-inhibiting, polymerization-controlling amount of phosphorous pentachloride, PCl.sub.5.
REFERENCES:
patent: 3917802 (1975-11-01), Allcock et al.
patent: 4693876 (1987-09-01), DeJaeger et al.
D'Halluin Ghislaine
De Jaeger Roger
Pagniez Guy
Potin Philippe
Atochem
Michl Paul R.
Yoon Tae H.
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