Amide and hydroxymethyl functionalized polyethers as thermoplastic barrier resins

US5115075A · kind A · utility

Assignee

• THE DOW CHEMICAL COMPANY · US

Inventors

• David J. Brennan · Midland, US
• Jerry E. White · Lake Jackson, US
• Anthony P. Haag · Midland, US
• Shari L. Kram · Sanford, US

Key dates

• Filing date: May 8, 1990
• Grant date: May 19, 1992
• Expiry date: May 8, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D303/24
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Polyethers having improved barrier to oxygen are normally solid, thermoplastic polyethers having aromatic ether repeating units in their backbones and pendent hydroxyl moieties and pendent amido, N-substituted amido and/or hydroxyalkyl moieties. Such polyethers are prepared by reacting diglycidyl ethers of dihydric aromatic compounds such as diglycidyl ether of bisphenol A with dihydric phenols having pendent amido, N-substituted amido and/or hydroxyalkyl moieties such as 2,2-bis(4-hydroxyphenyl)acetamide and 3,5-dihydroxybenzamide.