Flame retardant phosphate ester derivatives of ortho novolaks

Details Flame retardant phosphate ester derivatives of ortho novolaks Flame retardant phosphate ester derivatives of ortho novolaks

1975-12-03

1977-03-01

Schain, Howard E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25F, 260 293, 260 328R, 428153, 260DIG24, C08G 1244

Patent

active

040101444

ABSTRACT:
The present invention relates to polymer compositions and to a process of producing phenolic novolak resins having a high phosphorus content. It is known that phenolic novolak resins may be reacted with P.sub.2 O.sub.5. However, it has now been found that if the novolak has substantially entirely ortho-ortho linkage the amount of phosphorus, suitably in the form of P.sub.2 O.sub.5, P.sub.2 S.sub.5, P.sub.2 O.sub.3 or mixtures thereof, that may be reacted is greatly increased and the polymer produced has enhanced fire-retardant properties. The present polymers have a wide utility in the production of flame-retardant molding compositions and laminates.

REFERENCES:
patent: 2736706 (1956-02-01), Morris
patent: 3354240 (1967-11-01), Pochowicz
patent: 3409571 (1968-11-01), Shepard et al.
Chem. Abstracts, vol. 56, 1962, 11785a, Bebikh et al.
Chem. Abstracts, vol. 66, 1967, 105300t, Dannels et al.
Chem. Abstracts, vol. 77, 1972, 166980j, Morris et al.

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