Thermoplastic cellulose ether ester graft copolymers and process for their production

US5466794A · kind A · utility

Assignee

• Wolff Walsrode AG · DE

Inventors

• Jochen Kalbe · Leichlingen, DE
• Hanns P. Muller · Leverkusen, DE
• Rainhard Koch · Neunburg vorm Wald, DE
• Jurgen Engelhardt · Bad Fallingbostel, DE
• Wolfgang Koch · Batavia, US
• Klaus Szablikowski · Walsrode, DE
• Gunter Weber · Linden, DE

Key dates

• Filing date: May 17, 1994
• Grant date: Nov 14, 1995
• Expiry date: May 17, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G63/664
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to novel thermoplastic, water-insoluble cellulose hydroxyalkyl hydroxycarboxylic acid esters of the general structure EQU Cell--O--R where Cell--O is the substituted OH group of a polymeric cellulose unit and R is either a monomeric and/or polymeric hydroxyalkylether hydroxycarboxylic acid ester of the structure X: EQU X=--A--B-- in which A is a linear polyether chain: EQU A=(--D--O--).sub.n in which D signifies a linear aliphatic branched or unbranched chain with 2 to 11 C atoms and n is a whole number equal to or greater than 1, and B is a linear polyester chain: ##STR1## in which E signifies a linear aliphatic branched or unbranched chain with 2 to 5 C atoms and m is a whole number equal to or greater than 1, or R is equal to A or B or X and a combination thereof in any ratio, or R is equal to H (hydrogen) according to the degree of substitution per anhydroglucose unit (max. 3) with A, B or X, and a process for their production and use of these cellulose derivatives as biodegradable mouldings.