Patent ID: 7196131

Claim:
A polymer-modified inorganic particle having a layer structure, wherein the polymer-modified inorganic particle has a mean particle diameter of from 5 nm to 20,000 nm and an interlamellar content of from 20 to 5000% by mass, based on the mass of the anhydrous inorganic particle, of a mixture of from 50 to 98% by mass of substantially aminoplasts and from 2 to 50% by mass of water, the polymer-modified inorganic particle having been prepared by swelling the inorganic particle with one or more C 1 –C 10 aldehydes as a solution in water or a mixture of water and one or more C 1 –C 8 -alcohols, which optionally contains one or more acidic catalysts to form an aldehyde-swollen inorganic particle, and subsequently reacting the aldehyde-swollen inorganic particle with a solution or suspension of one or more polyfunctional C 1 –C 30 amino compounds selected from the group, consisting of melamine, melamine derivatives, urea, urea derivatives, guanidine, guanidine derivatives, cyanamide, dicyandiamide, sulfonamide, a aniline and salts thereof in water or a mixture of water and one or more C 1 –C 8 alcohols.