Polymeric and oligomeric formals

US4119612A · kind A · utility

Assignee

• Dynamit Nobel GmbH · DE

Inventors

• Norbert Vollkommer · Troisdorf, DE
• Gerhard Schade · Witten, DE
• Egon N. Petersen · Neunkirchen, DE
• Gerhard Bier · Troisdorf, DE
• Herbert Klinkenberg
• Werner Schmidt · Rengsdorf, DE

Key dates

• Filing date: Apr 29, 1976
• Grant date: Oct 10, 1978
• Expiry date: Apr 29, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L101/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A polymeric formal having the general formula ##STR1## wherein p is 0 or 1, n is a positive integer from 2 to 200 and R represents optionally halogen-substituted straight-chained or branched-chained alkyl radicals having 3 to 8 carbon atoms, an aryl radical or an aralkyl radical which can be substituted on one or both sides with alkyl or hydroxyalkyl ether groups; improved methods for the preparation of such formals, tetrabromoxylylene-bis-(.beta.-hydroxyethylether) compounds employed in the preparation of such formals and the use of such polymeric and oligomeric formals as flame retardant agents in plastic compositions especially thermoplastic and polycondensation plastic compositions.