continued from part 1 - Controller General of Patents, Designs, and ...

(12) PATENT APPLICATION PUBLICATION (21) Application No.6418/DELNP/2008 A
(19) INDIA
(22) Date of filing of Application :22/07/2008 (43) Publication Date : 24/10/2008
(54) Title of the invention : PROCESS FOR INCREASING THE MOLECULAR WEIGHT OF A POLYAMIDE
(51) International classification :C08/G 69/46 (71)Name of Applicant :
(31) Priority Document No :06075258.1
1)DSM IP ASSETS B.V.
(32) Priority Date :08/02/2006
Address of Applicant :HET OVERLOON 1, NL-6411 TE
(33) Name of priority country
:EUROPEAN
UNION
HEERLEN, THE NETHERLAND Netherlands
(72)Name of Inventor :
(86) International Application No :PCT/EP2007/000992 1)BRONSAER, CORNELIA EMILIA MARIA
Filing Date
:06/02/2007
2)MAASSEN, MATHIJS HUBERT GERTRUDES
(87) International Publication No :WO 2007/090602 3)VAN GEENEN, ALBERT ARNOLD
(61) Patent of Addition to Application
Number
Filing Date
:NA
:NA
4)KIERKELS, RENIER HENRICUS MARIA
(62) Divisional to Application Number :NA
Filing Date
:NA
(57) Abstract :
Process for increasing the molecular weight of a polyamide comprising a first step, wherein the polyamide is contacted in
countercurrent with a first stream comprising 15 to 100 wt.% H2O and 85 to 0 wt.% N2 at a temperature between 90 and 180 °C and
for a time between 5 and 10 hours and a second step, wherein the polyamide obtained in the first step is contacted in countercurrent
with a second stream comprising 90 to 100 wt% N2 and 10 to 0 wt% H2Oat a temperature between 130 and 200 °C and for a time
between 10 and 30 hours.
No. of Pages : 10 No. of Claims : 9
The Patent Office Journal 24/10/2008 25897