Council of Scientific and Industrial Research

Arvind Sudhakar More

Prakash Purushottam Wadgaonkar

Murali Sastry

Rahul Shingte

Yves Gnanou

Rachid Matmour

Pandian Senthil Kumar

Periasamy Selva Kannan

Matmour Rachid

The present invention provides a novel dicarbanionic initiator of formula (I).  The present process further provides a process for the preparation of dicarbanionic initiator of formula (I) comprising reacting 1-bromo-4-(4'-bromophenoxy)-2-pentadecyl benzene of formula (II) with alkyllithium compound for an effecting halogen-lithium exchange reaction of 1-bromo-4-(4&#x2032;-bromophenoxy)-2-pentadecyl benzene with sec-butyllithium in the presence of a non polar solvent, at a temperature in the range of 0 to 25&#xb0; C. and its use as an initiator for the synthesis of telechelic polydienes and polystyrenes and SBS or SIS triblock copolymers.

Dicarbanionic initiator, a process for the preparation and use thereof

The present invention provides a novel bisphenol compound of formula (I). wherein Rand Rare the same or different and are independently either hydrogen or methyl at each occurrence. The present invention also provides a process for preparation of these bisphenol compounds starting from Cashew Nut Shell Liquid (CNSL); &#x2014;a renewable resource material. The bisphenols prepared in the present invention can be utilized as difunctional monomers for the preparation of various polymers such as epoxy resins, polyesters, polyethersulfones, polyetherketones, polyetherimides, polyarylates, polycarbonates, etc.

Bisphenol compound and process for preparation thereof

The invention discloses a method for synthesizing hollow structured freestanding membrane having pore size of 2 to 200 nm which provides long-term stability that makes it viable for many practical applications such as protein separation and drug delivery.

Process for the preparation of free standing membranes

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Maharashtra, India

Arvind Sudhakar More