Patent ID: 7884152

Claim:
A manufacturing method of organic modifier-free exfoliated nano clay-polymer composite, comprising: (S 1 ) dispersing layered clay nanoparticles modified by forming ionic bonds with an organic modifier in an acidic solvent and dissolving a thermoplastic polymer of polyethylene terephthalate in said acidic solvent to separate the organic modifier from the layered clay nanoparticles modified by forming ionic bonds with an organic modifier; (S 2 ) adding the product of step (S 1 ) to a non-solvent for the thermoplastic polymer of polyethylene terephthalate capable of dissolving the organic modifier separated from the layered clay nanoparticles modified by forming ionic bonds with an organic modifier, but incapable of dissolving said thermoplastic polymer of polyethylene terephthalate to precipitate a organic modifier-free exfoliated nano clay polymer composite; and (S 3 ) separating the organic modifier-free exfoliated nano clay-polymer composite from all ingredients of step (S 2 ).