Council of Scientific & Industrial Research

General Electric Company

Other

Swaminathan Sivaram

Bhaskar Bhairavnath Idage

Godavarthi S Varadarajan

Soumen Sensarma

Joseph A King, Jr

Deepak Kumar Tuli

Akhilesh Kumar Bhatnagar

Sobhan Ghosh

Madan Mohan Rai

Parshuram Gajanan Shukla

Sabyasachi Sinha Ray

Lalgudi Srinivasan Ramanathan

Arumugam Sudalai

Rakesh Sarin

Chilukuri Ver Avadhani

Venkat Srinivasan Iyer

Babanrao M Shinde

Sudhakar Sadashiv Mahajan

Sukhendu Bikash Hait

Thekke Pangil Mohandas

Dattatraya Haribhau Gholap

Mallinamadugu Jogimarappa Yanjarappa

Vishnu Ramchandra Ranade

Jagdish C Sehra

Durairaj Bhaskaran

Sanjay P Kashikar

Pradeep K Dhal

Ratnaprabha S Khisti

Paul Dean Sybert

Patrick Joseph McCloskey

Eric James Pressman

James Alfred Day

Raghunath Vitthal Chaudhari

Gaylord M Kissinger

Gautam Chatterjee

Ashutosh Anant Kelkar

Ashok K Mendiratta

Prakash Purushottam Wadgaonkar

Rein Mollerus Faber

Bahram Moasser

Vikas Kumar

Abbas-Alli Ghudubhai Shaikh

Arun Savalaram Jadhav

Joseph Anthony King, Jr

Susheela Bhaskar Idage

Sunil Purushottam Gupte

Bhalchandra Mahadeo Bhanage

Sheo Satish

Anjanikumar Jyotiprasad Varma

Nayaku Nivrati Chavan

Subhash Pundlik Vernekar

Ishwar Singh Bhardwaj

Sudhir Bavikar

Christian Maria Emile Bailly

Ver Avadhani Chilukuri

Ramesh Chellaswamy

Kundalik Ganpat Raut

Subbareddiar Kanagasabapathy

Asif Maner

Abbas-Alli G Shaikh

Durairaj Baskaran

Prakash P Wadgonkar

Srinivasan Chakrapani

Natarajan Rajagopalan

Nayaku Nivarati Chavan

Shamal Karunakaran Menon

Yogesh Ramesh Nevare

Subagiri Ramaswamyiyengar Srinivasan

Shukla Parshuram Gajanan

Mohammed Shadbar Qureshi

Ravi Kant Shukla

Lourduswamy Emmanuvel

Chidambaram Rameshkumar

Meeta Sharma

Suryavanshi Gurunath

Prabhat Kumar Saxena

Swati Shantikumar Kulkarni

Koyalagunta Ravindranath

The present invention discloses a film comprising porous, amorphous polybenzimidazole (PBI) and at least one filler for use as a separator in a lithium ion battery and a process for preparation thereof.

Porous polybenzimidazole as separator for lithium ion batteries

The present invention relates to a novel process for the preparation of a linear monomer alkyl lactyl lactate by a simple esterification reaction of acid with ester in presence of suitable catalysts or reagents. The present invention further relates to a process for the preparation of poly acid from alkyl lactyl lactate by using suitable catalyst.

Process for the preparation of hydroxyl functional esters and polyesters therefrom

The present invention provides polymer microcapsules of biocide, useful for preparing coating materials such as interior and exterior paints, which comprises of an active agent biocide and an encapsulating polymer. Microcapsules described in this invention are prepared by dispersing an organic phase containing an active agent either in dissolved state or dispersed state in a polymer solution using a low boiling point solvent, in an aqueous phase containing an emulsifying agent; agitating the emulsion at 800-1200 resolution per minute for 3-5 hours at 25 -27&#xb0; C. to evaporate the low boiling point solvent and thus to permit the formation of the microcapsules; separating the microcapsules, washing with water and drying the microcapsules at temperature between 25-35&#xb0; C.

Microcapsules containing biocide and preparation thereof by solvent evaporation technique

The present invention provides a reusable transition metal complex catalyst useful for the preparation of high pure quality 3,3'-diaminobenzidine and its analogues. The present invention also provides to a process for the preparation of a reusable transition metal complex catalyst. The present invention further provides a process for the preparation of 3,3&#x2032;-diaminobenzidine (DAB) or 3,3&#x2032;,4,4&#x2032; Tetraminobiphenyl (TAB) using reusable transition metal complex catalyst. The high quality 3,3&#x2032;-diaminobenzedine (DAB) and its analogues are prepared by coupling 4-halo-2-nitroaniline to 3,3&#x2032;-dinitrobenzidine (DNB) using transition metals as catalysts followed by reduction of 3,3&#x2032;-dinitrobenzidine to the corresponding substituted 3,3&#x2032;-diaminobenzidine of formula 1 in high yields.

Reusable transition metal complex catalyst useful for the preparation of high pure quality 3,3'-diaminobenzidine and its analogues and a process thereof

The present invention provides nucleated polyolefins using shellac based nucleating agents wherein the nucleated polyolefins obtained have improved crystallization temperature (Tc) and smaller spherulitic size and hence improved transparency characteristics.

Nucleated polyolefins and preparation thereof

The present invention relates to a process for the preparation of pure high quality 3,3&prime;, 4,4&prime;-tetraminobiphenyl (TAB) in high yields. The present invention also discloses a process for the preparation of 3,3&prime;,4,4&prime; tetraminobiphenyl (TAB) comprising a three step process: (1) oxidation 3,3&prime;-dichloro 4,4&prime;-diaminobiphenyl (DCB) with 50% aq. H O , (2) ammonolysis of the resulting 3,3&prime;-dinitro 4,4&prime;-dinitrobiphenyl (DCDNB) and (3) reduction of 3,3&prime;-diamino-4,4&prime;-dinitrobiphenyl (DADNB) with stannous chloride and concentrated hydrochloric acid.

Process for the preparation of high quality 3,3&prime;,4,4&prime;-tetraminobiphenyl

Hydroxyarylalkenes, particularly the ones constituting cashew nut shell liquid, are converted to (hydroxyalkyl)phenols, particularly 3-(8-hydroxy-noctyl)phenol, by ozonolysis followed by reduction, preferably with a hydride such as sodium borohydride. No protective acylation of the hydroxyarylalkenes is necessary. The resulting (hydroxyalkyl)phenols are useful for the preparation of polycarbonates.

(Hydroxyalkyl)phenols, method for their preparation, and uses thereof

Copolycarbonates containing such structural units as birefringence-reducing or &ldquo;soft block&rdquo; units are prepared by conducting a reaction, such as melt polymerization or equilibration, between a precursor polycarbonate and a monomer, polycarbonate oligomer or high molecular weight polycarbonate which is a source of other structural units. The crystallinity of the resulting precursor copolycarbonate or one of the reagents employed in its preparation is enhanced and the precursor copolycarbonate is subjected to solid state polymerization.

Copolycarbonate preparation by solid state polymerization

1,1 -Bis(4-hydroxyphenyl)-3-alkylcyclohexanes, as illustrated by 1,1-bis (4-hydroxyphenyl)-3-pentadecylcyclohexane, are prepared by hydrogenating a composition comprising 3-alkylphenols to the corresponding cyclohexanol, oxidizing the cyclohexanol to a cyclohexanone and contacting the cyclohexanone with phenol in the presence of an acidic catalyst. The preferred 3-alkylphenols are those derived from cashew nut shell liquid. The products can be used to prepare polycarbonates.

1,1-Bis(4-hydroxyphenyl)-3-alkylcyclohexanes, method for their preparation and polycarbonates prepared therefrom

This invention relates to the process for the preparation of aqueous polyurethane dispersions, which comprises preparing an isocynate terminated carboxyl group containing prepolymer, by preparing a solution of a polyol in an organic solvent, adding an ionic group containing compound to this solution, heating this mixture at a controlled temperature, adding an isocyanate in the reaction mixtute optionally in the presence of a catalyst depending upon the isocynate, stirring, neutralizing and cooling the mixture at ambient temperatures and finally dispersing the mixture in water to obtain the product.

Process for the preparation of stable aqueous urethane dispersions

Polycarbonate oligomers are prepared by oxidative carbonylation of a dihydroxyaromatic compound such as bisphenol A in the presence of a catalyst comprising a Group VIII metal such as palladium, an inorganic and/or an organic co-catalyst, a halide source and an alcohol-free solvent comprising at least one liquid aromatic hydrocarbon, optionally in combination with a dipolar aprotic liquid such as N-methylpyrrolidinone. These oligomers may be further polymerized by melt polymerization to precursor polycarbonate oligomers which may be converted to high molecular weight polycarbonates by melt or solid state polymerization.

Method for preparing polycarbonates by oxidative carbonylation

The invention relates to a process for the polymerization of olefins, which comprises polymerizing an olefin or mixture thereof in presence of a solvent, a supported metallocene and an aluminoxane as cocatalyst in a hydrocarbon medium, at a temperature in the range of 50 to 150&deg; C., at a pressure ranging between 1 to 20 bar, for a period of 10 minutes to 10 hours, scavenging the reaction mixture by addition of an organoaluminum compound to remove the last traces of impurities of solvent, separating the polymer by conventional methods like precipitating, filtering, washing the polymer with an organic solvent, drying the polymer to remove the solvent to obtain the product.

Process for polymerization of olefins

The invention relates to a process for the preparation of poly (ester-carbonate)s from the corresponding oligomers, using solid state polymerization process, which comprises mixing the desired oligomers in a suitable solvent or non-solvent, adding a suitable catalyst to this mixture, refluxing the mixture for a period of 1 to 8 hours, removing the solvent by known methods, polymerization the oligomer mixture in the solid state either in presence of vacuum or under a flow of inn gas at a temperature ranging between 180-240.degree. C. for a period of 5 to 20 hours to obtain the product.

Process for the preparation of poly(ester-carbonate)s

This invention relates to the process for the preparation of polyurethane with controlled particle size and shape. More, particularly it relates to the production of polyurethane microspheres from a diol and diisocyanate by dispersion polymerization in presence of a steric stabilizer and a catalyst in an organic solvent at a controlled temperature, and finally separating the spherical polyurethane particles from the reaction mixture by conventional means.

Process for the preparation of polyurethane spherical particle

A process for the preparation of an inert oxide supported metal halide organo aluminium compound catalyst. The catalyst is obtained by reacting an activated support having surface hydroxyl groups with aluminium chloride selected from aluminium chloride solution and aluminium chloride vapors. A solution of an aluminium alkyl is added to the reacted support. The solvent is removed and the reacted support is dried.

Process for the preparation of supported aluminium chloride catalyst

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Pune, India

Swaminathan Sivaram