Ethylenebis(hydroxyalkylphosphinic acid) and salts thereof

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...

Reexamination Certificate

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C524S121000, C524S126000, C524S133000, C524S139000, C524S147000, C562S020000, C562S023000

Reexamination Certificate

active

08084518

ABSTRACT:
The invention relates to an ethylenebis(hydroxyalkylphosphinic acid) and salts thereof. The acid has the general formula: A-P(O)(OX)—CR1R2—CR3R4—P(O)(OX)-A. Variable A is CR5R6—OH. Variables R1, R2, R3, R4, R5, and R6are the same or different, and denote independently from each other H, C1-C20alkyl, C6-C20aryl, or C6-C20aralkyl, so long as at least one of R1and R2is H and at least one of R3and R4is H. Variable X denotes H, an alkali metal, an element of main or transition group 2, an element of main or transition group 3, an element of main or transition group 4, an element of main or transition group 5, an element of transition group 6, an element of transition group 7, an element of transition group 8 and/or a nitrogen base. Also disclosed are a method for producing same and the use thereof.

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