US 2012/0064790 A1 · Ethylene Diphosphinic Acids

Abstract

The invention relates to ethylene diphosphinic acids and salts thereof of general formula A-P(O)(OX)—CR1R2—CR3R4—P(O)(OX)-A, in which A, H and/or CR5R6—OH, R1, R2, R3, R4, R5, R6 are the same or different, and denote independently from each other H, C1-C20 alkyl, C6-C20 aryl and or C6-C20 aralkyl, and X denotes H, an alkali metal, an element of the second main and secondary group, an element of the third main and secondary group, an element of the fourth main and secondary group, an element of the fifth main and secondary group, an element of the sixth secondary group, an element of the seventh secondary group, an element of the eight secondary group and/or a nitrogen base. Also disclosed are a method for producing same and the use thereof.

Claims16

Dependent claims

An ethylenediphosphinic acid or salt thereof having the formula (I)

A-P(O)(OX)—CR1R2—CR3R4—P(O)(OX)-A (I)
where A is H and/or CR5R6—OH,
R1, R2, R3, R4, R5, R6 are identical or different and are each, independently of one another, H, C1-C20-alkyl, C6-C20-aryl or C6-C20-aralkyl and
X is 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.

1 more element

An ethylenediphosphinic acid or salt thereof as claimed in one or more of claims 1 to 3, wherein A is H and X is Li, Na, K;

Mg, Ca, Zn, Sr;
Al, Ce, La;
Ge, Sn, Pb, Ti, Zr;
Sb, Bi;
Cr, Mo, W;
Mn;
Fe, Co or Ni.

4 more elements

An ethylenediphosphinic acid or salt thereof as claimed in one or more of claims 1 to 4, wherein A is H and X is H, Na, Al, Zn, Ca, Mg, Ti or melamine.

A process (1) for preparing ethylenediphosphinic acids and salts thereof having the formula (I)

A-P(O)(OX)—CR1R2—CR3R4—P(O)(OX)-A (I)
where A is H and/or CR5R6—OH,
R1, R2, R3, R4, R5, R6 are identical or different and are each, independently of one another, H, C1-C20-alkyl, C6-C20-aryl or C6-C20-aralkyl and
X is H or an alkali metal, wherein
a) a monophosphinic acid adduct of the formula (II)
H—P(O)(OX)-A (II)
is reacted with acetylene and
b) if desired, the resulting ethylenediphosphinic acid of the type
A-P(O)(OX)—CR1R2—CR3R4—P(O)(OX)-A
is separated off from by-products.

7 more elements

Dependencies are inferred from the claim text.

Ethylene Diphosphinic Acids

Life of this patent

Ethylene Diphosphinic Acids

Life of this patent

Abstract

Claims16