Surface-modified salts of phosphinic acid

Details Surface-modified salts of phosphinic acid Surface-modified salts of phosphinic acid

2006-08-08

2006-08-08

Richter, Johann (Department: 1621)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S133000, C524S135000, C252S609000

Reexamination Certificate

active

07087666

ABSTRACT:
The invention relates to surface-modified phosphinic salts of the formula (I) and/or diphosphinic salts of the formula (II) and/or polymers of these,whereR1and R2are identical or different and are C1–C6-alkyl, linear or branched, and/or aryl;R3is C1–C10-alkylene, linear or branched, C6–C10-arylene, -alkylarylene, or -arylalkylene;M is Mg, Ca, Al, Sb, Sn, Ge, Ti, Zn, Fe, Zr, Ce, Bi, Sr, Mn, Li, Na, K, and/or a protonated nitrogen base;m is from 1 to 4;n is from 1 to 4;x is from 1 to 4,wherein the phosphinic salts and/or diphosphinic salts, or their polymers, have been encapsulated with a surface layer composed of a synthetic resin or a wax, and to a process for their preparation, and to their use as flame retardants for thermoplastic and thermoset polymers.

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