Hemiesters of phosphonic acids

Details Hemiesters of phosphonic acids Hemiesters of phosphonic acids

1983-09-26

1985-01-22

Sutto, Anton H.

Chemistry of carbon compounds

Dipeptides, e.g., aspartame, anserine, carnosine, etc.

260961, C07F 940

Patent

active

044951116

ABSTRACT:
The invention relates to a fire-resistant synthetic resin composition containing a polycarbonate, more specifically a bisphenol A derivative, a phosphorous fireproofing additive derived from phosphonic acid, and possibly other additives and/or fillers.
The fireproofing additive is a Li, Na or K hemiester of a phosphonic acid derived from an aromatic or cycloaliphatic hydrocarbon, or from a polynuclear aromatic compound, and is added at the rate of 0.01 to 0.4 weight % in relation to polycarbonate. This small amount of additive improves the fire-resistant properties of the polycarbonate, without affecting its mechanical properties.

REFERENCES:
patent: 3325569 (1967-06-01), D'Alelio

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