The invention relates to a mineral compound, referred to as synthetic mica, with formula A.sub.t(Si.sub.x-Ge.sub.1x).sub.4M.sub.zO.sub.10(OH).sub.2, wherein: A designates at least one monovalent interfoliar cation of a metal element, A having the formula Li.sub.w(1)Na.sub.w(2)K.sub.w(3)Rb.sub.w(4)Cs.sub.sw(5), each instance of w(i) representing a real number in the interval [0; 1], such that the sum of the instances of w(i) is equal to 1; t is a real number in the interval [0.3; 1]; x is a real number in the interval [0; 1]; M designates at least one divalent metal having the formula Mg.sub.y(1)Co.sub.y(2)Zn.sub.y(3)Cu.sub.y(4)Mn.sub.y(5)Fe.sub.y(6)Ni.sub.y(7)Cr, each instance of y(i) representing a real number in the interval [0; 1], such as the formula (A); and z is a real number in the interval [2.50; 2.85]. The invention also relates to a composition comprising such a compound and a method for preparing such a compound. $\underset{i=1}{\overset{5}{.Math.}}w\left(i\right)=1^{″}$$\underset{i=1}{\overset{8}{.Math.}}y\left(i\right)=1^{″}$

A silicate-coated body contains: a mica particle; a first silicate coating at least part of the mica particle; and an ionic organic colorant adsorbed to the first silicate. The ionic organic colorant includes at least one selected from the group consisting of amaranth, new coccine, phloxine B, rose bengal, acid red, fast green, indigo carmine, lithol rubine B, and lithol rubine BCA.

A silicate-coated body contains: a mica particle; a first silicate coating at least part of the mica particle; and a functional substance that is carried by the first silicate.

The invention relates to a process for delamination of a layered silicate in an aqueous medium, wherein in a first step a layered silicate is treated with a delamination agent, and in a second step the thus treated layered silicate is contacted with an aqueous medium, whereby the delamination agent is a compound having exactly one positively charged atom, the positively charged atom being selected from the group consisting of nitrogen and phosphorous; contains n.sub.f functional groups selected from the group consisting of hydroxyl groups, ether groups, sulfonic acid ester groups and carboxylic acid ester groups, n.sub.f being a number from 3 to 10; comprises a total number of carbon atoms n.sub.c being from 4 to 12; has a ratio n.sub.c/(1+n.sub.f) from 1 to 2, wherein n.sub.c is the total number of carbon atoms of the delamination agent and n.sub.f is the total number of functional groups in the delamination agent as defined under ii.; contains n.sub.t atoms selected from the group consisting of carbon, nitrogen, phosphorous, oxygen and sulfur, n.sub.t being 9; and wherein the delamination agent is used to treat the layered silicate in an amount of at least equal to the cation exchange capacity of the layered silicate. The invention further relates to the thus produced delaminated layered silicates, their use in the production of composite and coating material and as a barrier material. Moreover, the invention relates to compositions containing the thus produced delaminated layered silicates.

The invention relates to a process for delamination of a layered silicate in an aqueous medium, wherein in a first step a layered silicate having a layer charge L.sub.c from 0.25 to 1.0 and a charge equivalent area A.sub.s=47.6 .sup.2/(2L.sub.c), is treated with a delamination agent, and in a second step the thus treated layered silicate is contacted with an aqueous medium, whereby the delamination agent is a compound having exactly one positively charged atom, the positively charged atom being selected from the group consisting of nitrogen and phosphorous; contains of functional groups selected from the group consisting of hydroxyl groups, ether groups, sulfonic acid ester groups and carboxylic acid ester groups, n.sub.f being a number from 1 to 10; comprises a total number of carbon atoms n.sub.c being from 2 to 20; has a ratio n.sub.c/(1+n.sub.f) from 1 to 5, wherein n.sub.c is the total number of carbon atoms of the delamination agent and n.sub.f is the total number of functional groups in the delamination agent as defined under ii.; and has a charge equivalent area A.sub.d being from at least 0.90-fold to 3-fold of the charge equivalent area of the layered silicate A.sub.s; and wherein the delamination agent is used to treat the layered silicate in an amount of at least equal to the cation exchange capacity of the layered silicate, with the proviso that n.sub.f2, if L.sub.c0.6. The invention further relates to the thus produced delaminated layered silicates, their use in the production of composite and coating material and as a barrier material. Moreover, the invention relates to compositions containing the thus produced delaminated layered silicates.

A sealing material including a water-resistant sheet, wherein the water-resistant sheet includes layered clay minerals having a thickness of 0.5 nm to 800 nm. A sealing material including a sheet, wherein the sheet includes modified layered clay minerals in which at least a portion of a first cation between the interlayer of swellable layered clay minerals is ion-exchanged with a second cation, in a first cation being one or more selected from Na.sup.+ and Li.sup.+. A sealing material including a sheet, wherein the sheet includes layered clay minerals having a thickness of 0.5 nm to 800 nm, and having one or more selected from K.sup.+, Ba.sup.2+ and Pb.sup.2+ are contained in at least a portion in an interlayer of the clay minerals.

The invention relates to a process for delamination of a layered silicate in an aqueous medium, wherein in a first step a layered silicate is treated with a delamination agent, and in a second step the thus treated layered silicate is contacted with an aqueous medium, whereby the delamination agent is a compound having exactly one positively charged atom, the positively charged atom being selected from the group consisting of nitrogen and phosphorous; contains n.sub.f functional groups selected from the group consisting of hydroxyl groups, ether groups, sulfonic acid ester groups and carboxylic acid ester groups, n.sub.f being a number from 3 to 10; comprises a total number of carbon atoms n.sub.c being from 4 to 12; has a ratio n.sub.c/(1+n.sub.f) from 1 to 2, wherein n.sub.c is the total number of carbon atoms of the delamination agent and n.sub.f is the total number of functional groups in the delamination agent as defined under ii.; contains n.sub.t atoms selected from the group consisting of carbon, nitrogen, phosphorous, oxygen and sulfur, n.sub.t being 9; and wherein the delamination agent is used to treat the layered silicate in an amount of at least equal to the cation exchange capacity of the layered silicate. The invention further relates to the thus produced delaminated layered silicates, their use in the production of composite and coating material and as a barrier material. Moreover, the invention relates to compositions containing the thus produced delaminated layered silicates.

A process for delamination of a layered silicate in an aqueous medium includes treating a synthetic or naturally occurring 2:1 clay mineral layered silicate with a delamination agent, and contacting the treated layered silicate with an aqueous medium. An amount of the delamination agent used to treat the layered silicate can be at least equal to the cation exchange capacity of the layered silicate. A delaminated layered silicate can be obtained from the process and provided in a dispersion, a composite, or a barrier.

The invention relates to a mineral compound, referred to as synthetic mica, with formula A.sub.t(Si.sub.xGe.sub.1-x).sub.4M.sub.zO.sub.10(OH).sub.2, wherein: A designates at least one monovalent interfoliar cation of a metal element, A having the formula Li.sub.w(1)Na.sub.w(2)K.sub.w(3)Rb.sub.w(4)Cs.sub.w(5), each instance of w(i) representing a real number in the interval [0; 1], such that the sum of the instances of w(i) is equal to 1; t is a real number in the interval [0.3; 1]; x is a real number in the interval [0; 1]; M designates at least one divalent metal having the formula Mg.sub.y(1)Co.sub.y(2)Zn.sub.y(3)Cu.sub.y(4)Mn.sub.y(5)Fe.sub.y(6)Ni.sub.y(7)Cr, each instance of y(i) representing a real number in the interval [0; 1], such as the formula (A); and z is a real number in the interval [2.50; 2.85]. The invention also relates to a composition comprising such a compound and a method for preparing such a compound.

[00001]$\underset{i=1}{\overset{5}{.Math.}}.Math..Math.w\left(i\right)=1^{}$$\underset{i=1}{\overset{8}{.Math.}}.Math..Math.y\left(i\right)=1^{}$