Phosphorus-containing mixtures, a process for their preparation and their use

1. A mixture comprising compounds of the formula

RO—PO(A)-CH 2 —CH 2 —CO 2 H and  (I)

HO—PO(A)-CH 2 —CH 2 —CO 2 R  (II)

wherein

A is C 1 -C 18 -alkyl, C 6 -C 18 -alkylaryl, C 6 -C 18 -aralkyl or aryl,

R is (D,E)C═C(B, R 5 )

B, D, E are identical or different and are each H or C 1 -C 18 -alkyl

R 5 is a saturated, unsaturated or polyunsaturated C 1 -C 20 -(—CO—O-hydroxyalkylene).

2. A mixture comprising compounds of the formula

RO—PO(A)-CH 2 —CH 2 —CO 2 H and  (I)

HO—PO(A)-CH 2 —CH 2 —CO 2 R  (II)

wherein

A is C 1 -C 18 -alkyl, C 6 -C 18 -alkylaryl, C 6 -C 18 -aralkyl or aryl,

R is (D,E)C═C(B, R 5 )

B, D, E are identical or different and are each H or C 1 -C 18 -alkyl

R 5 is —CO—O—CH 2 —CH(OH)—CH 2 —, —CO—O—CH 2 —C(CH 2 OH) 2 —CH 2 —, —CO—O—(CH 2 ) 2 —CH(OH)—CH 2 — or —CO—O—CH 2 —C(CH 3 )(CH 2 OH) 2 —CH 2 —.

3. A mixture comprising compounds of the formula

RO—P(═O)(A)-CH 2 —CH 2 —CO 2 H and  (I)

H—OP(═O)(A)-CH 2 —CH 2 —CO 2 —R, in which  (II)

A is methyl, ethyl, propyl or butyl,

R is (D,E)C═C(B, R 5 ),

D being H or methyl,

E being H or methyl,

B being H or methyl,

R 5 being —CO—O—CH 2 —CH(OH)—CH 2 —, —CO—O—CH 2 —C(CH 2 OH) 2 —CH 2 —, —CO—O—(CH 2 ) 2 —CH(OH)—CH 2 — or —CO—O—CH 2 —C(CH 3 )(CH 2 OH) 2 —CH 2 —.

4. The mixture as claimed in claim 1 , comprising from 99.9 to 20% by weight of the compound of formula (I) and from 0.1 to 80% by weight of the compound of formula (II), the sum of the components always being 100% by weight.

5. A flameproofing agent comprising a mixture as claimed in claim 2 .

6. A flameproofing agent comprising a mixture as claimed in claim 2 .

7. A flameproofing agent comprising a mixture as claimed in claim 3 .