Process for the preparation of thermally stable polyoxymethylene copolymers

US5994455A · kind A · utility

Assignee

• Ticonna GmbH · DE

Inventors

• Karl-Friedrich Muck · Wiesbaden, DE
• Horst Roschert · Ober-Hilbersheim, DE
• Robert M. Gronner · Erlanger, US
• Satyajit Verma · Port Aransas, US
• Michael G. Yearwood · Corpus Christi, US

Key dates

• Filing date: Sep 8, 1998
• Grant date: Nov 30, 1999
• Expiry date: Sep 8, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2/24
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the preparation of polyoxymethylene copolymers, wherein 1,3,5-trioxane is polymerized with generally known comonomers in the presence of a strong protonic acid initiator and in the presence of a formaldehyde dialkyl acetal, and wherein the initiator is dissolved in the formaldehyde dialkyl acetal before admixing to the trioxane and the comonomers.