| Record no |
2011032366215 |
| Activity status |
Dead or Administration by others |
| Working Title |
AN IMPROVED PROCESS FOR THE PREPARATION OF MONO-ALKYL CARBONATE OF BISPHENOLS |
| Working Inventors |
SIVARAM S;SHAIKH AAG; |
| Contributing institutions |
NCL |
| Administered by |
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| Ownership |
|
| Categories > Subjects |
Polymer sciences and engineering |
| Categories > Portfolio |
Polymerization/Polymer catalysis |
| Disclosure number |
|
| NCL No |
1992-NCL-0022 |
| CSIR No |
1992-NF-0158
|
| Priority date |
12-23-1992 |
| Country |
IN |
| Application number |
1237DEL1992 |
| Provisional filing date |
|
| Complete filing date |
12-23-1992 |
| Publication status |
Yes |
| Publication date |
|
| Publication no |
|
| Granted number |
185382 |
| Granted date |
08-03-2001 |
| Final title |
AN IMPROVED PROCESS FOR THE PREPARATION OF MONO-ALKYL CARBONATE OF BISPHENOLS |
| Final Inventors |
SIVARAM S;SHAIKH AAG; |
| Abstract |
fAn improved process for the preparation of mono alkyl carbonatt
nuwBiH JQ bi8ph0noi9 of the formula I shown in the drawing accompanying
this specification where R. represents isopropylidsne
hexa fluoroiaopropylidane cyclohexane sulphone ketone ether
phthaline phthalimide and R re pee sents an alkyl froup with
0 1 B carbon atoms the alkyl group being linear branched or
cyclic x i s a straight chain of 1 to i carbon atoms or
alkyl group consisting of branching or a phenyl group or a
halogen atom and n is en integer ftam Q to 4 which comprises
reacting appropriate substituted biephenols of the formula II
FORMULA i where R . x has the measuring given above wi th exc«ss dialky
Icnrbonsteg having 1 to 8 cnrbon atoms in presence of a conventional
catalyst selected from organometallic compounds of tin
or titanium under inert atmosphere at a temperature in the
renqe of 80 150°c.9ndxre covering monolkyl carbonate of bispheno
Is By conventional metnons such as hete in described. |
| Case status |
Granted + Allowed to lapse |
| Licensing status |
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| Licensing case no |
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| Client name |
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| Lead inventors |
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| Categories > Industry > Primary |
|
| Categories > Industry > other |
|