High barrier amorphous polyamide-clay nanocomposite and a process for preparing same
AssigneeEastman Chemical Company
InventorsSam Richard Turner, Gary Wayne Connell, John Walker Gilmer, Vasiliki Psihogios, James Christopher Matayabas, Jr., Tie Lan, Shriram Bagrodia
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Abstract
This invention is directed to a polyamide-clay nanocomposite, products produced from the nanocomposite, and a process for preparing a polyamide-clay nanocomposite. The polyamide-clay nanocomposite comprises (a) an amorphous matrix polyamide comprising (i) a residue of a dicarboxylic acid component comprising at least two diacids and (ii) a residue of a diamine component, and (b) a layered clay material, wherein the layered clay material is dispersed in the matrix polyamide.
Claims64
A polyamide-clay nanocomposite comprising:
- (a) an amorphous matrix polyamide comprising (i) a residue of a dicarboxylic acid component comprising at least one diacid and (ii) a residue of at least one diamine component comprising at least one aromatic residue or at least one cycloaliphatic residue, and
- (b) a layered clay material, wherein the clay material is dispersed in the matrix polyamide.
A polyamide-clay nanocomposite comprising:
- (a) an amorphous matrix polyamide comprising (i) a residue of at least one dicarboxylic acid component and (ii) a residue of at least one diamine component, and
- (b) a layered clay material, wherein the clay material is dispersed in an amorphous matrix polyamide-compatible oligomeric resin and wherein the clay-oligomer resin dispersion is incorporated into the amorphous matrix polyamide.
A process for preparing an amorphous polyamide-clay nanocomposite comprising the steps of:
- (a) melt mixing a layered clay material with a matrix polyamide-compatible oligomeric resin to form an oligomeric resin-clay composite, and
- (b) mixing the oligomeric resin-clay composite with a high molecular weight amorphous matrix polyamide comprising (i) a residue of at least one dicarboxylic acid component and (ii) a residue of at least one diamine component, thereby increasing the molecular weight of the oligomeric resin-clay composite and producing a nanocomposite material.
A process for preparing an amorphous polyamide-clay nanocomposite comprising the steps of:
- (a) adding a layered clay material to a mixture of (i) at least one dicarboxylic acid component and (ii) a diamine component comprising at least one aromatic residue or at least one cycloaliphatic residue, and
- (b) conducting the polycondensation polymerization of components (i) and (ii) in the presence of the clay to prepare a polyamide-clay nanocomposite comprising an amorphous matrix polyamide.
Dependencies are inferred from the claim text.