Starch-based composition and process for the production thereof

Patent 7932378 Issued on April 26, 2011. Estimated Expiration Date:

October 24, 2023. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3346558

3399190

Glycoside polyethers
Patent #: 4011389
Issued on: 03/08/1977
Inventor: Langdon

Biodegradable plastic composition, method for preparing thereof and product prepared therefrom Patent #: 5861461
Issued on: 01/19/1999
Inventor: Lee, et al.

Inventors

Assignee

Valtion teknillinen tutkimuskeskus

Application

No. 10532398 filed on 10/24/2003

US Classes:

536/124Processes

Examiners

Primary: Jiang, Shaojia Anna
Assistant: Lau, Jonathan S

Attorney, Agent or Firm

Birch, stewart, Kolasch & Birch, LLP

Foreign Patent References

197 14 166 DE 10/01/1998
1 148 067 EP 10/01/2001
WO-03/068823 WO 08/01/2003
WO-03/068884 WO 08/01/2003

International Classes

C08B 31/10
C08B 31/16

Abstract

A process for manufacturing transglycosylation products. According to the process, a starch derivative is reacted at acidic conditions with an alkanol containing 1-6 hydroxyl groups and the reaction product is recovered as such or it is subjected to further processing. According to the method, the transglycosylation reaction between the starch derivatives and the alkanol is carried out in a reactive extrusion process, whereby the reaction can essentially be performed in the absence of liquid media at high yield. The invention also relates to new transglycosylation products of starch derivative, containing anions derived from a phosphorus-containing acid, which are chemically bonded to the product.

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