Modified polyethylenephosphinic acids and their salts
View Patent ↗The invention relates to polymeric phosphinic acids and their salts of the formula (I) where X is hydrogen or 1/m of a metal of valency m, or is a protonated nitrogen base, R 1 and R 2 are identical or different and are hydrogen, a carboxy group, a carboxylic acid derivative, an unsubstituted or substituted alkyl group having from 1 to 10 carbon atoms, phenyl, benzyl, or alkyl-substituted aromatic systems, R 3 and R 4 may be identical or different and are an unsubstituted or substituted alkyl group having from 2 to 20 carbon atoms, or are OX, with the above meaning for X, and ū is the average number of monomer units. The invention further relates to a process for preparing the above-mentioned compounds, and to their use.
1. A polymeric phosphinic acid or its salt of the formula (I)
where
X is 1/m of a metal of valency m,
R 1 and R 2 are identical or different and are hydrogen, a carboxy group, a carboxylic acid derivative, an unsubstituted or substituted alkyl group having from 1 to 10 carbon atoms, phenyl, benzyl, or alkyl-substituted aromatic systems,
R 3 and R 4 may be identical or different and are an unsubstituted or substituted alkyl group having from 2 to 20 carbon atoms, an OH group or are OX, with the above meaning for X, and
ū is from 2 to 1000, and wherein X is a metal of groups IIA, IIIA, IVA, VA, IIB, IVB, VIIB, VIIIB of the Periodic Table of the Elements, or is cerium.
2. The polymeric phosphinic acid or its salt as claimed in claim 1 , wherein the metal is Mg, Ca, Sr, Ba, Al, Ge, Sn, Sb, Bi, Zn, Ti, Zr, Mn, Fe or Ce.
3. The polymeric phosphinic acid or its salt as claimed in claim 1 , wherein the metal is Ca, Al or Zn.
4. The polymeric phosphinic acid or its salt as claimed in claim 1 , wherein R 1 and R 2 are identical or different and are hydrogen or an unsubstituted or substituted alkyl group having from 1 to 10 carbon atoms.
5. The polymeric phosphinic acid or its salt as claimed in claim 1 , wherein R 1 and R 2 are identical or different and are hydrogen, an unsubstituted alkyl group having from 1 to 10 carbon atoms, or a substituted alkyl group having 1 to 10 carbon atoms substituted by OH, CN, or NH 2 .
6. The polymeric phosphinic acid or its salt as claimed in claim 1 , wherein R 1 and R 2 are identical or different and are hydrogen or an alkyl group having from 1 to 4 carbon atoms which has substitution by one or two OH groups.
7. The polymeric phosphinic acid or its salt as claimed in claim 1 , wherein R 1 and R 2 are identical or different and are hydrogen or a carboxylic acid derivative.
8. The polymeric phosphinic acid or its salt as claimed in claim 1 , wherein R 1 and R 2 are identical or different and are hydrogen or a carboxylic acid derivative of the formula COOR, where R is an alkyl group having from 1 to 4 carbon atoms.
9. The polymeric phosphinic acid or its salt as claimed in claim 1 , wherein R 3 and R 4 are an unsubstituted or substituted alkyl group having from 1 to 10 carbon atoms.
10. The polymeric phosphinic acid or its salt as claimed in claim 1 , wherein each of R 3 and R 4 is an ethyl, propyl or butyl group.
11. The polymeric phosphinic acid or its salt as claimed in claim 1 , wherein each of R 3 and R 4 is an OX group, wherein X is as defined in claim 1 .
12. The polymeric phosphinic acid or its salt as claimed in claim 1 , wherein each of R 3 and R 4 is an OH group.
13. A polymeric phosphinic acid or its salt of the formula
where X=1/m metal of valency m, or amine-H +
and wherein ū is from 2 to 1000.
14. A polymeric phosphinic acid or its salt of the formula
where X=1/m metal of valency m
where R 3 and R 4 =ethyl, propyl, or butyl
wherein X is a metal of groups IIA, IIIA, IVA, VA, IIB, IVB, VIIB, VIIIB of the Periodic Table of the Elements, or is cerium and
ū is from 2 to 1000.