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

(12) PATENT APPLICATION PUBLICATION (21) Application No.6413/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 MAKING POLYBUTYLENE TEREPHTHALATE (PBT)FROM POLYETHYLENE
TEREPHTHALATE (PET)"
(51) International classification :C08G 63/00 (71)Name of Applicant :
(31) Priority Document No :60/763,093
1)GENERAL ELECTRIC COMPANY
(32) Priority Date :27/01/2006
Address of Applicant :1 RIVER ROAD,SCHENECTADY,NY
(33) Name of priority country :U.S.A.
12345 U.S.A. U.S.A.
(86) International Application No :PCT/US2007/002197 (72)Name of Inventor :
Filing Date
:26/01/2007
1)MILLER KENNETH FREDERICK
(87) International Publication No :WO 2007/089600 2)KANNAN GANESH
(61) Patent of Addition to Application
Number
Filing Date
:NA
:NA
3)DHAWAN SANDEEP KUMAR
4)SHAH DHAVAL
5)COHOON KRISTEN
(62) Divisional to Application Number :NA
6)GALLUCCI ROBERT RUSSELL
Filing Date
:NA
(57) Abstract :
The invention relates to a process for making modified polybutylene terepththalate random copolymers from a polyethylene
terephthalate component. In one embodiment, the invention relates to a two step process in which a 1,4-butane diol component reacts
with a polyethylene terephthalate component under conditions that depolymerize the polyethylene terephthalate component into a
molten mixture and the molten mixture is placed under subatmospheric conditions that produce the modified polybutylene
terepththalate random copolymers. In another embodiment, the invention relates to a three step process in which a diol component
selected from the group consisting of ethylene glycol, propylene glycol, and combinations thereof reacts with a polyethylene
terephthalate component under conditions sufficient to depolymerize the polyethylene terephthalate component into a first molten
mixture; and where the first molten mixture is combined with 1,4-butane diol under conditions that create a second molten mixture
that is subsequently placed under subatmospheric conditions mat produce the modified polybutylene terepththalate random
copolymers. The invention also relates to compositions made from processes of the invention.
No. of Pages : 59 No. of Claims : 37
The Patent Office Journal 24/10/2008 25872