Global Patent Index - EP 1073693 A1

EP 1073693 A1 2001-02-07 - COPRECIPITATION OF CELLULOSE ESTERS WITH FUNCTIONAL ADDITIVES AND COMPOSITIONS THUS OBTAINABLE

Title (en)

COPRECIPITATION OF CELLULOSE ESTERS WITH FUNCTIONAL ADDITIVES AND COMPOSITIONS THUS OBTAINABLE

Title (de)

GEMEINSAME AUSFÄLLUNG VON CELLULOSEESTERN MIT FUNKTIONELLEN ADDITIVEN UND SO ERHÄLTLICHE ZUSAMMENSETZUNGEN

Title (fr)

CO-PRECIPITATION D'ESTERS CELLULOSIQUES ET D'ADDITIFS FONCTIONNELS, ET COMPOSITIONS AINSI OBTENUES

Publication

EP 1073693 A1 (EN)

Application

EP 99916652 A

Priority

  • US 9908027 W
  • US 8160898 P
  • US 29036599 A

Abstract (en)

[origin: WO9955774A1] The application relates to a process for blending a cellulose ester with a functional additive, by: (a) admixing the functional additive with the cellulose ester and a first acid; and (b) contacting the admixture with an aqueous precipitating agent, whereby a blend comprising the cellulose ester and the functional additive coprecipitates. The application further relates to a process for preparing a controlled release matrix system for an agricultural additive or a pharmaceutical additive, and to controlled release matrix system composed of a homogeneous mixture of (a) at least one biodegradable cellulose ester and (b) at least one agricultural additive or pharmaceutical additive.

IPC 1-7 (main, further and additional classification)

C08L 1/10; A01N 25/10; A61K 9/28

IPC 8 full level (invention and additional information)

A61K 47/38 (2006.01); A01N 25/10 (2006.01); A61K 9/16 (2006.01); C08B 3/00 (2006.01); C08L 1/10 (2006.01)

CPC (invention and additional information)

C08L 1/10 (2013.01); A01N 25/10 (2013.01); A61K 9/1652 (2013.01)

Citation (search report)

See references of WO 9955774A1

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

WO 9955774 A1 19991104; EP 1073693 A1 20010207; JP 2003526694 A 20030909

INPADOC legal status


2001-11-28 [18W] WITHDRAWN

- Date of withdrawal: 20010928

2001-02-07 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000919

2001-02-07 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB IT