Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From boron reactant having at least one boron to hydrogen or...
Patent
1980-03-12
1981-06-30
Briggs, Sr., Wilbert J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From boron reactant having at least one boron to hydrogen or...
528168, 528399, 528 6, C08G 7300
Patent
active
042764033
ABSTRACT:
Polydihalophosphazenes, e.g. --N.dbd.P(Cl).sub.2 ].sub.n, are allowed to react at ambient temperatures for at least one hour with a lithium carborane in a suitable inert solvent. The remaining chlorine substituents of the carboranyl polyphosphazene are then replaced with aryloxy or alkoxy groups to enhance moisture resistance. The polymers give a high char yield when exposed to extreme heat and flame and can be used as insulation.
REFERENCES:
patent: 3155630 (1964-11-01), Schroeder
patent: 3164556 (1965-01-01), Apley et al.
patent: 3169933 (1965-02-01), Liu et al.
patent: 3549604 (1970-12-01), Semenuk et al.
Allcock Harry R.
Fewell Larry L.
Frosch Robert A. Administrator of the National Aeronautics and Space
O'Brien John P.
Scopelianos Angelo G.
Brekke Darrell G.
Briggs Sr. Wilbert J.
Manning John R.
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