Patent ID: 8168698

Claim:
A method for producing random form of nanosilicate platelets by exfoliating inorganic clay with a hyperbranched polyamine, comprising steps of: (a) mixing and acidifying an exfoliating agent with an inorganic acid to form an acidified exfoliating agent, wherein the exfoliating agent is hyperbranched polyamine amine-terminated BPA epoxy oligomers (AEO) having more than two amine functional groups at two ends thereof and is obtained by reacting poly(oxypropylene)-triamine having molecular weight ranging from 100 to 1,000 with DGEBA, wherein the amine functional groups are secondary or primary; (b) intercalating layered inorganic silicate clay with the acidified exfoliating agent to form a first mixture; and (c) dissolving the first mixture in a first solvent, and reacting with at least one equivalent of a hydroxide or chloride of alkali metal or alkaline-earth metal through a displacement reaction to form a second mixture containing the random form of nanosilicate platelets.