Polymeric phosphinic acids and salts thereof
AssigneeClariant GmbH
InventorsMartin Sicken, Norbert Weferling, Hans-Peter Schmitz
Life of this patent
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Abstract
The invention relates to polymeric phosphinic acids and their salts of the formula (I) in which X is hydrogen or a 1/m metal of valency m, R1 and R2 are identical or different and are hydrogen, a carboxyl group, a carboxylic acid derivative, an unsubstituted or substituted alkyl group having 1 to 10 carbon atoms, phenyl, benzyl or alkyl-substituted aromatics, R3 and R4 are identical or different and are hydrogen or a vinyl group of the formula (VI) —CR1═CHR2 (VI) in which R1 and R2 have the abovementioned meaning, and {overscore (u)} is the average number of monomer units. The invention also relates to a process for the preparation of the abovementioned compounds and their use.
Claims24
A process for preparing polymeric phosphinic acids and their slats of the formula(I):
- in which
- X is hydrogen or a 1/m metal of valency m,
- R1 and R2 are identical or different and are hydrogen, a carboxyl group, a carboxylic acid derivative, an unsubstituted or substituted alkyl group having 1 to 10 carbon atoms, phenyl, benzyl or alkyl-substituted aromatics,
- R3 and R4 are identical or different and are hydrogen or a vinyl group of the formula (VI)
- —CR1═CHR2 (VI)
- in which R1 and R2 have the abovementioned meaning, and
- {overscore (u)} is the average number of monomer units,
- comprising the step of reacting hypophosphorous acid and/or its alkali metal salts with acetylenes of the formula (II)
- R1—C≡C—R2 (II)
- in which R1 and R2 are identical or different and are hydrogen, a carboxyl group, a carboxylic acid derivative, an unsubstituted or substituted alkyl group having 1 to 10 carbon atoms, phenyl, benzyl or alkyl-substituted aromatics.
A thermoplastic polymer compound comprising:
- a thermoplastic polymer;
- and
- a flame retardant, wherein said flame retardant is a polymeric phosphinic acid or a salt thereof of the formula (I)
- in which
- X is hydrogen or a 1/in metal of valency m,
- R1 and R2 are identical or different and are hydrogen, a carboxyl group, a carboxylic acid derivative, an unsubstituted or substituted alkyl group having 1 to 10 carbon atoms, phenyl, benzyl or alkyl-substituted aromatics,
- R3 and R4 are identical or different and are hydrogen or a vinyl group of the formula (VI)
- —CR1═CHR2 (VI)
- in which R1 and R2 have the abovementioned meaning, and
- {overscore (u)} is the average number of monomer units.
A synthetic building block for synthesis in organophosphorus chemistry comprising a polymeric phosphinic acid or a salt thereof of the formula (I)
- in which
- X is hydrogen or a 1/in metal of valency m,
- R1 and R2 are identical or different and are hydrogen, a carboxyl group, a carboxylic acid derivative, an unsubstituted or substituted alkyl group having 1 to 10 carbon atoms, phenyl, benzyl or alkyl-substituted aromatics,
- R3 and R4 are identical or different and are hydrogen or a vinyl group of the formula (VI)
- —CR1═CHR2 (VI)
- in which R1 and R2 have the abovementioned meaning, and
- {overscore (u)} is the average number of monomer units.
Dependencies are inferred from the claim text.