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PATENT APPLICATION PUBLICATION
INDIA
Date of filing of Application: 28/09/2001
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Application No.: 1010/DEL/2001
Publication Date:09/06/2006
(54) Title of the Invention: “ A Process for the Preparation of Novel Polysulfide Corpolymers”
(51) International Classification : C 01 B 07/00
(31) Priority Document No.
NA
:
(32) Priority Date : NA
(33) Name of priority country NA
(86) International application No. : NA
Filing Date : NA
(87) International Publication No. : NA
(61) Patent of Addition to
Application No.
: NA
(62) Divisional to Application No. : NIL
Filed On : NA
Total No. of pages : 21
(71) Name of Applicant :
Council of Scientific &Industrial
Research.
Address of the Applicant: Rafi Marg, new
Delhi – 110001.
(72) Name of the Inventor:
Subramanian Sundarrajan,
Kalathur Sabdham,
Vangepuram Srinivasan,
(57) Abstract: A process for the preparation of novel polysulfide copolymers is provided whereby styrene dibromide
is polymerized with ethylene/methylene dibromide in presence of sodium/potassium sulfide using phase transfer
catalyst. The polysulfide copolymers prepared by this new process exhibit melting point in the range of 59-124 0 C and
are soluble in organic solvents thereby ensuring their easy processability for industrial applications.
The Patent Office Journal 09/06/2006 11102
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