24/06/2005 - Controller General of Patents, Designs, and Trade Marks

(21) Application No. 0808/DEL/1999 A (22) Date of filing of Application: 27/05/1999
(54) Title of the invention: “AN IMPROVED PROCESS FOR THE PREPARATION OF STARCH BASED
BIODEGRADABLE POLYESTERS.”
(51) International Classification 7 : C 08L 101/00,3/00,
29/04, 67/00
(30) Priority Data:
(31) Document No.: NA
(32) Date: NA
(33) Name of convention country: NA
(66) Filed U/s 5(2): NIL
(61) Patent of addition to application No.: NA
(62) Filed on: NA
(63) Divisional to Application No.: NIL
(64) Filed on: NA
Total No Of Page:
(57) Abstract:
(71) Name of the applicant:
COUNCIL OF SCIENTIFIC AND
INDUSTRIAL RESEARCH
Address of the Applicant:
Rafi Marg, New Delhi-110001
(72) Name of the Inventor:
ANJANIKUMAR JYOTIPRASAD
VARMA,
SUJATA PANDURANG KOKANE,
PARIMAL DESHPANDE,
AMIT PARADKAR
NEERU CHOUDHARY.
An improved process for the preparation of starch based biodegradable polyesters which comprises
thermally melting and degrading the recycled / degraded polyesters at temperature at 80 to 120 0 C
above the melting point of the said polyester under constant stiring at a rate of 50 to 200 rpm for a
period ranging between 10 to 40 minutes, adding starch in the range of 30 to 300%w/w of
thermally degraded polyesters and keeping the reaction mixture under above mentioned conditions
for a period of 1 to 10 minutes, and quickly removing the material to obtain the starch based
polyesters.
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