Method of preparation of cardo polyetherketone (PEK-C) structural foam material

US11001689B2 · kind B2 · utility

Assignees

• JIANGSU SINC-TECH POLYMERIZATION NEW MATERIALS INDUSTRY TECHNOLOGY RESEARCH INSTITUTE · CN
• Changchun Institute of Applied Chemistry Chinese Academy of Sciences · CN

Inventors

• Guangyuan ZHOU · Changchun, CN
• Honghua Wang · Changchun, CN
• Wei Li · 东风镇, CN

Key dates

• Filing date: Dec 2, 2016
• Grant date: May 11, 2021
• Expiry date: Dec 2, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2371/10
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A method of preparation of a cardo polyetherketone structural foam material, including the following steps: 1) performing a mould pressing on a cardo polyetherketone resin by a high-temperature vulcanizing machine to prepare a foaming billet; 2) placing the foaming billet in a foaming cavity of a mould-pressing machine, performing a penetration and a swelling by introducing a supercritical fluid to achieve diffusion equilibrium, forming a polymer-supercritical fluid homogeneous solution, and 3) making the polymer-supercritical fluid homogeneous solution supersaturated through a sudden release of the inner pressure of the system, thereby inducing nucleation and foaming, and finally forming a structural foam having a closed pore structure with a uniform pore size and an adjustable pore density. The production process of the present invention is clean, environmentally friendly, and has relatively high efficiency. The obtained structural foam has good mechanical properties.