Polyfluoroalkylphosphonic acid, method for producing the...

C - Chemistry – Metallurgy – 07 – F

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C07F 9/38 (2006.01) B29C 33/62 (2006.01)

Patent

CA 2753117

Disclosed is a polyfluoroalkylphosphonic acid represented by the general formula: C nF2n+1(CH2CF2)a(CF2CF2)b(CH2CH2)cP(O)(OH)2, wherein n is an integer of 1 to 6, a is an integer of 1 to 4, b is an integer of 1 to 3, and c is an integer of 1 to 3, or a salt thereof, which is a compound having a perfluoroalkyl group containing 6 or less carbon atoms, which is said to have low bioaccumulation potential, and being usable as an active ingredient of a mold-releasing agent. The polyfluoroalkylphosphonic acid is produced by hydrolyzing a polyfluoroalkylphosphonic acid diester represented by the general formula: C nF2n+1(CH2CF2)a(CF2CF2)b(CH2CH2)cP(O)(OR)2, wherein R is a C1-C4 alkyl group, n is an integer of 1 to 6, a is an integer of 1 to 4, b is an integer of 1 to 3, and c is an integer of 1 to 3.

L'invention porte sur un acide polyfluoroalkylphosphonique représenté par la formule générale : CnF2n+1(CH2CF2)a(CF2CF2)b(CH2CH2)cP(O)(OH)2 [dans laquelle n représente un entier de 1 à 6 ; a représente un entier de 1 à 4 ; b représente un entier de 1 à 3 ; et c représente un entier de 1 à 3], qui est un composé ayant un ou des groupes perfluoroalkyle portant 6 atomes de carbone ou moins, qui est considéré comme ayant un faible potentiel de bioaccumulation et qui utilisable comme ingrédient actif d'un agent de démoulage. L'invention porte également sur un sel de cet acide. Cet acide polyfluoroalkylphosphonique est obtenu par hydrolyse d'un diester d'acide polyfluoroalkylphosphonique représenté par la formule générale : CnF2n+1(CH2CF2)a(CF2CF2)b(CH2CH2)cP(O)(OR)2 [dans laquelle R représente un groupe alkyle portant 1 à 4 atomes de carbone ; n représente un entier de 1 à 6 ; a représente un entier de 1 à 4 ; b représente un entier de 1 à 3 ; et c représente un entier de 1 à 3].

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