Flame retardants for polymers

Details Flame retardants for polymers Flame retardants for polymers

1991-03-26

1992-04-07

Hoke, Veronica P.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

556174, C07F 938, C07F 940, C08K 55333

Patent

active

051029324

ABSTRACT:
A reaction of alumina trihydrate, dimethyl methylphosphonate and a phosphonic acid of formula ##STR1## where R.sup.1 denotes an alkyl group of 1 to 4 carbon atoms, optionally substituted by at least one group selected from a hydroxyl group, a carboxyl group or a phosphonic acid group --P(O)(OH).sub.2, or a C.sub.6 to C.sub.12 aryl group and R.sup.2 denotes a hydrogen atom or an alkyl group of 1 to 4 carbon atoms, is useful as a flame retardant for polymers.

REFERENCES:
patent: 3576923 (1971-04-01), Randell et al.
patent: 4939285 (1990-07-01), Weis et al.
patent: 4972011 (1990-11-01), Richardson et al.
patent: 4973727 (1990-11-01), Gainer et al.

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