Patent Number: 7,786,189

Title: Oligomer-modified layered inorganic compounds and their use in nanocomposites

Abstract: Intercalates, exfoliates thereof, and nanocomposite compositions are formed by intercalating a layered silicate material, e.g., a phyllosilicate, with an oligomer or polymer intercalant that is a reaction product of at least one diamine with at least one dicarboxylic acid, to form a polyamide oligomer containing a xylylenediamine component. The oligomer or polymer may be formed in-situ by contacting the layered phyllosilicate with polymerizable monomer reactants using conditions to cause reaction and polymerization in the intercalating composition and intercalation of the resulting oligomer and/or polymer, between platelet layers of the phyllosilicate. An amine functionality of the oligomer or polymer is protonated for ion-exchange with interlayer cations of the phyllosilicate to bond the intercalant to the phyllosilicate platelet, at the protonated amine, at a negative charge site previously occupied by the interlayer cations.

Inventors: Maruo; Kazunobu (Kanagawa, JP), Kanda; Tomomichi (Chiba, JP), Omachinski; Scott (Mount Prospect, IL), Liang; Ying (Lake Zurich, IL), Lan; Tie (Lake Zurich, IL)

Assignee: Amcol International Corp.

International Classification: C08K 9/00 (20060101); C08K 3/34 (20060101); C08L 77/00 (20060101)

Expiration Date: 8/31/12018