A method of producing a complex of a lamellar inorganic compound and an organic compound includes: heat-treating a particular non-swelling lamellar inorganic compound within a pyrolysis temperature range of the non-swelling lamellar inorganic compound; and intercalating an organic compound into the non-swelling lamellar inorganic compound in a dispersion liquid in which the heat-treated non-swelling lamellar inorganic compound is dispersed in a medium, thereby inserting the organic compound into an interlamellar space of the non-swelling lamellar inorganic compound.

The present invention relates to a surface-coated particle in which a portion or all of the surface of a particle (A) is coated with a surface treatment agent (B), wherein a dynamic friction coefficient of the surface-coated particle is 0.50 or less, when a 5% by mass ethanol dispersion of the surface-coated particle is applied onto a polyurethane substrate in an amount of 2 mg/cm.sup.2, and dried for 24 hours under atmospheric pressure at 23 C., followed by measurement under conditions of a load of 3.53 N, a moving speed of 10 mm/sec, a moving distance of 50 mm, 30 reciprocations, and a temperature of 252 C., and the standard deviation of the dynamic friction coefficient is 0.020 or less.

A laminate of layered substances each containing two or more kinds of elements as constituent elements is contained in an ionic liquid containing a specific cation, and the ionic liquid containing the laminate is irradiated with one or both of sonic waves and electric waves.

A laminate of layered substances each containing two or more kinds of elements as constituent elements is contained in an ionic liquid containing a specific cation, and the ionic liquid containing the laminate is irradiated with one or both of sonic waves and electric waves.

A process for preparing phyllomineral synthetic particles formed from constituent chemical elements in stoichiometric proportions including at least one chemical element selected from the group formed from silicon and germanium, and at least one chemical element selected from the group formed from divalent metals and trivalent metals, by a continuous solvothermal treatment at a pressure above 1 MPa and at a temperature between 100 C. and 600 C., by making the reaction medium circulate continuously in a solvothermal treatment zone of a continuous reactor (15) with a residence time of the reaction medium in the solvothermal treatment zone that is suitable for continuously obtaining, at the outlet of the solvothermal treatment zone, a suspension including the phyllomineral synthetic particles.

This disclosure provides products useful as construction materials and containing set gypsum and ammonium-exchanged vermiculite, including a gypsum panel having a gypsum core comprising set gypsum and ammonium-exchanged vermiculite and characterized by decreased heat shrinkage and increased resistance to fire damage in comparison to the gypsum panel that comprises vermiculite that has not been ammonium-exchanged. The disclosure further relates to methods for producing the gypsum panel and constructing building assemblies with the gypsum panels, including walls and ceilings.

A sheet and a sealing material based on clay and excellent in an electrical insulating property in a high-temperature environment. A sheet, containing: a first component as a main component; and a second component optionally, in which the first component is clay, a diameter change rate is 10% or less, as thermal dimensional stability, when a weight of the entire sheet is 100% by weight, a content of iron oxide is 6% by weight or less, the second component is a filling material, when the weight of the entire sheet is 100% by weight, a sum of the first component and the second component is 90% by weight or more, and the first component: the second component=20:80 to 100:0 is set, and a sealing material containing the sheet.