Flame retardant compositions of halogen-free polymers containing

Details Flame retardant compositions of halogen-free polymers containing Flame retardant compositions of halogen-free polymers containing

1991-08-07

1992-07-21

Morgan, Kriellion S.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C08K 552

Patent

active

051323460

ABSTRACT:
Compounds of the general formula ##STR1## wherein R.sub.1 and R.sub.2 are each independently of the other hydrogen, C.sub.1 -C.sub.6 alkyl, or phenyl or naphthyl, each unsubstituted or substituted by 1 to 3 C.sub.1 -C.sub.4 alkyl groups, R.sub.3 and R.sub.4 are each independently of the other hydrogen or C.sub.1 -C.sub.4 alkyl, with the proviso that R.sub.3 and R.sub.4 may not simultaneously be hydrogen, and R.sub.5 is hydrogen, C.sub.1 -C.sub.6 alkyl, or phenyl or naphthyl, each unsubstituted or substituted by 1 to 3 C.sub.1 -C.sub.4 alkyl groups, and X is oxygen or sulfur, are very suitable flame retardants for polymers.

REFERENCES:
patent: 3006947 (1961-10-01), Lanham et al.
patent: 4252750 (1981-02-01), Buysch et al.
patent: 4605692 (1986-08-01), Spivack et al.
patent: 4618633 (1986-10-01), Taubitz et al.

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