Epoxy resins flameproofed with 1,2-oxaphospholanes

Details Epoxy resins flameproofed with 1,2-oxaphospholanes Epoxy resins flameproofed with 1,2-oxaphospholanes

1977-06-02

1978-08-08

Czaja, Donald E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260DIG24, 528 89, C08K 553

Patent

active

041056302

ABSTRACT:
2-Oxo-2-alkoxy-5-dialkylphosphono-1,2-oxaphos-pholanes of the formula ##STR1## in which R.sub.1 to R.sub.7 are hydrocarbon radicals can be prepared from .alpha., .beta.-unsaturated ketones and 2 or more moles of a dialkyl phosphite. Obviously .beta.-ketophosphonates are intermediates of this reaction as these compounds react with 1 or more moles of dialkyl phosphite in yielding the oxaphospholanes too. Both reactions are promoted by alkaline catalysts.
The new oxaphospholane derivatives are considerably stable against thermal decomposition. They can be used as flame retardants in epoxy resins.

REFERENCES:
patent: 3268619 (1966-08-01), Nametz
patent: 3274131 (1966-09-01), Leon
patent: 3399171 (1968-08-01), Vogt et al.
patent: 3839239 (1974-10-01), Godfried
patent: 3849368 (1974-11-01), Anderson et al.
patent: 3970726 (1976-07-01), Batorewicz
patent: 3994858 (1976-11-01), Porret et al.
patent: 3998789 (1976-12-01), Yoshioka
patent: 4001176 (1977-01-01), Clovis et al.

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