Polymers flameproofed with 1,2-oxaphospholanes

Details Polymers flameproofed with 1,2-oxaphospholanes Polymers flameproofed with 1,2-oxaphospholanes

1977-06-13

1978-09-12

Czaja, Donald E.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

106177, 260 458A, 260 458R, 260 458RW, 260297P, 260329P, 26034611, 521906, C08K 553

Patent

active

041136691

ABSTRACT:
2-Oxo-2-alkoxy-5-dialkylphosphono-1,2-oxaphospholanes 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 .gamma.-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 are compatible with polymeric materials and can be used as flame protecting agent for plastics and resins, for example, in polyurethane foams.

REFERENCES:
patent: 3668302 (1972-06-01), Boland et al.
patent: 3849368 (1974-11-01), Anderson et al.
patent: 3887656 (1975-06-01), Shim
patent: 3970726 (1976-07-01), Batorewicz
patent: 4001176 (1977-01-01), Clovis et al.
patent: 4024207 (1977-05-01), Biehler et al.

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