Global Patent Index - EP 1070086 A1

EP 1070086 A1 2001-01-24 - METHOD FOR PRODUCING STARCH ESTERS

Title (en)

METHOD FOR PRODUCING STARCH ESTERS

Title (de)

VERFAHREN ZUR HERSTELLUNG VON STÄRKEESTERN

Title (fr)

PROCEDE DE PRODUCTION D'ESTERS D'AMIDON

Publication

EP 1070086 A1 (DE)

Application

EP 99907304 A

Priority

  • DE 9900276 W
  • DE 19805367 A

Abstract (en)

[origin: DE19805367A1] The invention relates to a method for producing compostable starch esters which can be subsequently converted into thermoplastically deformable products, said method being carried out in a continuous or discontinuous way. The activation of starch with carboxylic acid anhydrides is carried out under intensive influence of mechanical energy, pressure or cavitation whereby the organophoby of starch particles is overcome. Consequently, the carboxylic acid anhydride penetrates quickly and quasi-thoroughly in the starch particles, without any change in the partially crystalline structure of said particles, at the time when the acid carboxylic anhydrides simultaneously react with residual moisture of the natural or modified starches, without any noticeable destructuring. According to the invention, activation is carried out at a temperature ranging from 10 to 140 DEG C and at a pressure comprised between 0.001 and 100 bars, preferably at a temperature ranging from 15 to 100 DEG C and at a pressure comprised between 0,01 and 1000 bars.

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

C08B 31/02; C08B 31/04; C08B 31/16; C08B 31/18; C08B 33/02; C08B 33/06

IPC 8 full level (invention and additional information)

C08B 31/04 (2006.01); C08B 31/16 (2006.01); C08B 31/18 (2006.01); C08B 35/02 (2006.01)

CPC (invention and additional information)

C08B 31/04 (2013.01); C08B 31/16 (2013.01); C08B 31/18 (2013.01); C08B 31/185 (2013.01); C08B 35/02 (2013.01)

Citation (search report)

See references of WO 9941287A1

Designated contracting state (EPC)

BE DE ES FR GB IT NL

EPO simple patent family

DE 19805367 A1 19990812; EP 1070086 A1 20010124; WO 9941287 A1 19990819

INPADOC legal status


2002-11-20 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020513

2002-02-13 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20020103

2001-01-24 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000908

2001-01-24 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): BE DE ES FR GB IT NL