Synthesis of polyamides in liquid and supercritical CO.sub.2

Details Synthesis of polyamides in liquid and supercritical CO.sub.2 Synthesis of polyamides in liquid and supercritical CO.sub.2

1997-02-12

2000-02-15

Hampton-Hightower, P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528310, 528322, 528323, 528335, 528336, 528480, 528481, 528483, 528502C, C08G 6900

Patent

active

060254599

ABSTRACT:
A method of forming a polyamide from a corresponding nylon salt material comprises providing a reaction mixture comprising a nylon salt and carbon dioxide; and then condensing the nylon salt in the carbon dioxide to form a polyamide and water. A method of forming a polyamide comprises providing a reaction mixture containing at least one lactam monomer and carbon dioxide; and then polymerizing the lactam monomer in the carbon dioxide to form a polyamide.

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Clifford et al. Chemical Reactions in Supercritical Fluids, Chemistry and Industry, No. 12, pp. 449-452 (1996).
Romack et al., Synthesis of Tetrafluoroethylene-based, Nonaqueous Fluoropolymers in Supercritical Carbon Dioxide, Macromolecules, vol. 28, No. 24 (1995).
Givens et al., Synthesis of Polyamides and Polycarbonates using Supercritical CO.sub.2, Polymer Preprints, American Chemical Society; Div. Polym. Chem., vol. 38, No. 2, pp. 468-469 (1997).
Abstract, XP-002069866, Database WPI, Section Ch., Week 7831, Derwent Publications Ltd. (1978).

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