Reliance Industries Limited

Ajit Behari Mathur

Raksh Vir Jasra

Krishna Renganath Sarma

Uma Sankar Satpathy

Satya Srinivasa Rao Gandham

Viralkumar Patel

Yogesh Popatrao Patil

Mahuya Bagui

Nanubhai Fuljibhai Patel

Gaurang Manilal Mehta

Suketu Vakil

Yogini Maheshbhai Amin

Vijay Shivaji Kadam

Amit Kumar Punamchand Shah

Ninad Deepak Ingle

Pradeep Paresh Kapadia

Pradip Munshi

Rakshvir Jasra

Shashikant

Ashishkumar Indravadan Parekh

Shivaji Vijay Kadam

Viral Kumar Patel

Devesh Kumar Shukla

ViralKumar Patel

Krishna Renganath Sharma

Jyotindra Bachubhai Patel

Mitul Sureshchandra Sheth

Kayambu Kannan

Sudhakar Padmanabhan

Umasankar Satpathy

Patil P Yogesh

The present disclosure provides a Ziegler-Natta catalyst composition for preparing polymers of ethylene monomers having ultrahigh molecular weight, said composition comprises (i) a pro-catalyst component containing a reaction product of a magnesium containing compound and a titanium containing compound, characterized in that said pro-catalyst component comprises magnesium, titanium and chlorine in an amount ranging between 15 and 18 mole %; 20 and 23 mole %; and 60 and 64 mole %, respectively, all proportions being with respect to the total weight of the Ziegler-Natta catalyst composition; (ii) a co-catalyst component; and (iii) at least one external electron donor compound selected from the group of organosilane compounds having the general formula (I), wherein R, R, Rand Rare all the same or all are different, or some are the same, and are individually selected from the group consisting of linear or branched alkyl groups, cycloalkyl groups, aryl groups, alkoxy and aryloxy groups. 

Heterogeneous Ziegler-Natta catalyst composition, a process for its preparation and a process for polymerizing olefin using the same

The present disclosure relates to a process for the preparation of high strength and high modulus polyethylene products/laminates consisting of steps such as providing a pre-dried, at least 50% disentangled ultra-high molecular weight polyethylene (UHMWPE) powder, feeding the UHMWPE powder having temperature ranging from &#x2212;15&#xb0; C. to 50&#xb0; C., at the nip of at least one pair of heated, polished counter rotating calendaring rollers, rotating at different roller speeds to obtain at least one pre-laminate and hot stretching the pre-laminate(s) at a pre-determined temperature and pre-determined stretching speed to obtain high strength laminates. The laminates provided by the present disclosure have tensile strength ranging between 0.5 GPa and 3.0 GPa and tensile modulus ranging between 40 GPa and 200 GPa.

High strength polyethylene products and a process for preparation thereof

The present disclosure provides a process for the chlorination of polyvinyl chloride. PVC obtained during the suspension polymerization reaction is directly used for chlorination without filtration, drying and re-slurrying. The present process is carried out in the absence of additional chemicals/reagents; also reheating during the chlorination reaction is not required. CPVC manufactured using the process of the present disclosure has whiteness index greater than 85, yellowness index lower than 4 and thermal stability in the range of 300 to 550 seconds at 210&#xb0; C.

Process for manufacturing chlorinated polyvinylchloride

The present disclosure relates to a compact polymer gel consisting of disentangled ultrahigh molecular weight polyethylene (dis-UHMWPE), at least one nucleator, at least one filler and at least one fluid medium. The present disclosure also provides a process for the preparation of the compact polymeric gel and fibers from the compact polymeric gel of both low and high denier values. The fibers prepared in accordance with the present process have tensile strength ranging from 2.5 to 13 GPa, tensile modulus ranging from 100 to 270 GPa.

High strength and high modulus ultra-high molecular weight polyethylene fibers

The present disclosure relates to a process for preparing of high thermal conductivity and high heat capacity oriented ultrahigh molecular weight polyethylene (UHMWPE) product. The process includes feeding UHMWPE through rollers to obtain a pre-laminate which is further hot stretched to obtain the oriented UHMWPE product having high thermal conductivity and high heat capacity. The temperature of stretching is maintained below the melt temperature of the UHMWPE throughout the entire process. There is also provided a high thermal conductivity and high heat capacity oriented UHMWPE product prepared by the process of the present disclosure. The oriented UHMWPE product is characterized in the axial thermal conductivity in the range of 70 to 200 W/mK, transverse direction thermal conductivity in the range of 0.022 to 0.045 W/mK and heat capacity in the range of 6 to 25 MJ/mK.

Process for preparing thermally conductive oriented UHMWPE products and products obtained therefrom

The present disclosure provides a process for the reduction of residual acidity of halogenated polymer. The process involves treating the halogenated polymer to a physical process such as rotary vacuum drying and then neutralizing the treated halogenated polymer with alkaline metal salt solutions. The process requires less quantity of an economic neutralizing agent/base during chemical treatment, thus improving process economy without prejudicing quality of the final halogenated polymer.

Process for preparing halogenated polymer having reduced residual acidity and yellowness index of 3.5 and below

A catalyst composition and a process for obtaining a colored olefin polymer are disclosed. The composition comprises a Ziegler-Natta catalyst and an additive component comprising a colorant. The catalyst composition enables a directly colored polymer to be prepared. The colored polymer has a homogeneous dispersion of the colorant in it and thus has no color defects.

Catalyst composition and process for obtaining a colored olefin polymer

The present disclosure relates to a compact polymer gel consisting of ultrahigh molecular weight polyethylene (UHMWPE), at least one nucleator, at least one filler and at least one fluid medium. The present disclosure also provides a process for the preparation of the compact polymeric gel and fibers from the compact polymeric gel. The fibers prepared in accordance with the present process have tensile strength ranging from 2.5 to 10 GPa and tensile modulus ranging from 110 to 300 GPa.

Compact polymeric gel and fibers made therefrom

The present disclosure provides a heterogeneous Ziegler-Natta catalyst system to be used in the preparation of ultra-high molecular weight polymers (UHMWP). The system includes at least one procatalyst, at least one co-catalyst, at least one hydrocarbon medium and at least one external donor, wherein the ratio of elemental magnesium to elemental titanium to halide, in the procatalyst, is 1:1.3:3.7; the ratio of elemental aluminum, present in the co-catalyst to elemental titanium, present in the procatalyst, ranges between 6:1 and 12:1; and the ratio of elemental silicon, present in the external donor to elemental titanium, present in the procatalyst, ranges between 1:10 and 10:1. The present disclosure also provides a process for preparation of UHMWPE using the heterogeneous Ziegler-Natta catalyst system of the present disclosure.

Heterogeneous ziegler-natta catalyst system and a process for olefin polymerization using the same

In the present disclosure an easily processable ultrahigh molecular weight polyethylene and a process for preparation thereof is disclosed wherein the easy processable ultrahigh molecular weight polyethylene is prepared by melt mixing a first ultrahigh molecular weight polyethylene having poor process-ability and a second ultrahigh molecular weight polyethylene along with a minimal amount of solvent. The easily processable ultrahigh molecular weight polyethylene is melt processable below its melting point and requires lesser compression molding time as compared to the first ultrahigh molecular weight polyethylene.

Easily processable ultrahigh molecular weight polyethylene and a process for preparation thereof

The present disclosure relates to a transition metal based pro-catalyst represented by Formula I: wherein, the substituents have the meaning as defined in the specification. The present disclosure also relates to a process for preparing the transition metal based pro-catalyst represented by Formula I and the catalyst composition obtained therefrom. Further, the present disclosure relates to a process for polymerizing olefins by employing the catalyst composition comprising the transition metal based pro-catalyst represented by Formula I. 

Transition metal based pro-catalyst and a process for its preparation

In accordance with the present disclosure, there is provided a solid state graft copolymerization process for the preparation of disentangled ultrahigh molecular weight polyethylene graft copolymers in which disentangled ultrahigh molecular weight polyethylene is admixed with at least one functional monomer and a free radical initiator to obtain a mixture; and the mixture thus obtained is subjected to solid state polymerization to obtain a graft copolymer of disentangled ultrahigh molecular weight polyethylene. The graft copolymers of disentangled ultrahigh molecular weight polyethylene shows better crystallization temperature that ranges between 117&#xb0; C. to 121&#xb0; C. and improved decomposition temperature (T) that ranges between 460&#xb0; C. to 480&#xb0; C.

Disentangled ultra high molecular weight polyethylene graft co-polymers and a process for preparation thereof

A polymer composition has homogenous dispersion of a first polymer with a second polymer. The first polymer includes but is not limited to ethylene based homopolymer and ethylene based copolymer. The second polymer has molecular weight higher than the molecular weight of the first polymer and heat of fusion greater than 200 J/g.

Polymer composition and a process for preparing the same

There is provided a chemically immobilized heterogeneous single site polymerization catalyst represented by Formula I.  or such that Ris a molecule having a carboxylic or sulphonic acid group; such that Ris a molecule having a carboxylic or sulphonic acid group;and Xand Xare independently F, Cl, Br or I. There is also provided a method for the preparation of the chemically immobilized heterogeneous single site polymerization catalyst as represented by Formula I.

Immobilization of single site catalyst on inorganic oxide support for preparation of UHMWPE

The present invention relates to a non-cryogenic process for the large scale synthesis of disentangled ultra high molecular weight polyethylene (DUHMWPE) polymers. The process comprises of the following steps: with a hydrocarbon solvent containing poly-methyl aluminoxane (P-MAO) co-catalyst in a vessel under stirring before polymerization or directly in the polymerization vessel at a temperature ranging between 25&#xb0; C. and 29&#xb0; C. under a dry Nitrogen atmosphere; and lower concentration of co-catalyst resulting in the associated benefits as described earlier in the claims and descriptions.

Growing community of inventors

Vadodara, India

Ajit Behari Mathur