Polyacetals, preparation thereof from dialdehydes and polyolcarboxylic acids, and use of same

US4816553A · kind A · utility

Assignee

• BASF SE

Inventors

• Richard Baur · Mutterstadt, DE
• Rolf Fikentscher · Ludwigshafen, DE
• Alfred Oftring · Bad Dürkheim, DE
• Felix Richter · Ludwigshafen, DE
• Wolfgang Trieselt · Ludwigshafen, DE
• Paul Diessel · Mutterstadt, DE
• Ekhard Winkler · Mutterstadt, DE
• Johannes Perner · Neustadt, DE

Key dates

• Filing date: Feb 17, 1988
• Grant date: Mar 28, 1989
• Expiry date: Feb 17, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G4/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyacetals obtainable by reaction of PA0 (a) a dialdehyde of the formula EQU OHC--A.sub.n --CHO PA0 where PA1 A=C.sub.1 -C.sub.4 -alkylene or ##STR1## and n is 0 or 1, is reacted with PA0 (b) a polycarboxylic acid of 5 to 7 carbon atoms which contains not less than 3 OH groups, in a molar ratio (a):(b) of 1:0.25 to 4 in an aqueous medium in the presence of an acid catalyst, are used as additives in washing agents and as complexing agents for heavy metal ions.