Modified layered double hydroxide (ldh), particles comprising said ldh, and method for producing said ldh

Modified layered double hydroxide (LDH) according to formula (I):

• [[[M12+]y(M22+)z]1−x[M33+]x(OH)2](An−)x/n·mH2O (I)
• wherein M1 and M2 are each independently a divalent metal selected from the group of Mg, Zn, Ca, Sr, Cu, Fe, Mn, Co, Ni, Sn, Pb, Cd, and Ba,
• wherein M3 is a trivalent metal,
• wherein An− is one or more of an intercalating n-valent anion,
• wherein m, x, y, and z are values in the ranges represented by 0≤m<2, 0<x≤0.5, and 0.5≤y+z≤1,
• wherein the modified LDH comprises a modified outer layer, wherein the outer layer is modified with an organic acid or salts thereof,
• wherein the organic acid or salts thereof is one or more selected from di-carboxy-C1-12 alkyl, bis C1-12 alkyl phosphonate, N-substituted isocyanurate, mono-, di, tri-carboxy-C3-8 cycloalkane, or an organic acid according to formula (II):
• wherein k is an integer from 1 to 3,
• wherein n is an integer from 0 to 5,
• wherein A represents a cycloalkyl, aryl, or heteroaryl,
• wherein L represents a direct bond or NH,
• wherein R1 is one or more independently selected from hydroxy, carboxyl, C1-6 alkoxycarbonyl, arylcarbonylamino, amino, amide, C1-6 alkyl, hydroxy phosphoryl, Het, or Ar,
• wherein Ar represents an aryl,
• wherein Het represents heterocycle,
• wherein R2 represents C or P or S,
• wherein R3 is hydroxy and present when L represents a direct bond, or wherein R3 is hydroxy or C1-6 alkyl when L represents NH, and
• wherein R4 is hydroxy or C1-6 alkylcarbonyl and present when R2 represents P, or wherein R4 is a doubled bonded oxygen and present when R2 represents S.