Abstract: The present invention relates to a low melt copolyetherester based on terephthalic acid, isophthalic acid, aliphatic diols and polybutylene terephthalate. The melting point of the low melt copolyetherester is between 90° to 170° C.

Abstract: The present invention provide a polyester masterbatch comprising: at least one dicarboxylic acid or ester thereof; at least one diol; at least one high molecular weight polyalkylene glycol up to 60%; optionally DMSIP/SIPA up to 40%; at least one antioxidant up to 1.0%; and at least one or more additives up to 20%; which provides an environment friendly, cost effective, superior and easy dye ability solution for various polyesters.

Abstract: The present invention provide a polyester masterbatch comprising: at least one dicarboxylic acid or ester thereof; at least one diol; at least one high molecular weight polyalkylene glycol up to 60%; optionally DMSIP/SIPA up to 40%; at least one antioxidant up to 1.0%; and at least one or more additives up to 20%; which provides an environment friendly, cost effective, superior and easy dye ability solution for various polyesters.

Abstract: The present invention relates to a copolyester having intrinsic viscosity greater than 0.50 dL/gm, comprises: terephthalate polyester composition; and a modified transparent polybutylene naphthalate, wherein the modified polybutylene naphthalate comprises naphthalene dicarboxylic acid, 1,4-butane diol, and isophthalic acid or monoethylene glycol or diethylene glycol or cyclohexane dimethanol or polyethylene naphthalate, nucleating agent, and a modified nanoclay.

Abstract: A polybutylene naphthalate polyester and process for preparing polybutylene naphthalate polyester, for improving barrier performance of polyesters used in making of monolayer or multilayer containers. The process comprising: a) mixing butane diol with polymerization catalysts, monoethylene glycol, color toner, and at least one crystallization suppressing agent; b) reacting said mixture with naphthalene dicarboxylic acid or ester thereof to obtain oligomerized product via esterification or ester interchange; c) polymerizing said oligomer using at least one polymerization catalyst to obtain amorphous polybutylene naphthalate polyester chips; d) crystallizing said polybutylene naphthalate polyester chips; and e) subjecting said polyester chips to solid state polymerization to upgrade the intrinsic viscosity (I.V.) up to more than 0.40 dl/gm.

Abstract: The present invention relates to a polyethylene terephthalate (PET) composition suitable for manufacturing heat resistant and/or microwaveable containers comprising at least one dicarboxylic acid; at least one diol; at least one nucleating agent; at least one or more crystallization suppressing agents; at least one or more additives; wherein the composition is characterized by at least one of the following properties: Intrinsic Viscosity>0.56 dL/g; Glass transition temperature (Tg)<60° C. and Crystallization exothermic peak temperature (Tch)<60° C.

Abstract: The present disclosure relates to a process for preparing polyester. The process for preparing the polyester essentially involves the preparation of the isosorbide oligomer and the isosorbide polymer from the isosorbide oligomer. The isosorbide oligomer or isosorbide polymer is then co-polymerized with the polyester. The copolymerization isosorbide oligomer or isosorbide polymer may be carried out at any stage of the preparation of the polyester. The polyester obtained in accordance with the process of the present disclosure can be used in packaging applications such as preparing packaging materials or containers. The material or container obtained from the polyester of the present disclosure is capable of withstanding a temperature of 60 to 90° C. without undergoing any deformation and shrinkage. Further, the material or container obtained from the polyester of the present disclosure is transparent or has lower color b* value.

Abstract: The present invention relates to a copolyester having intrinsic viscosity greater than 0.50 dL/gm, comprises: terephthalate polyester composition; and a modified transparent polybutylene naphthalate, wherein the modified polybutylene naphthalate comprises naphthalene dicarboxylic acid, 1,4-butane diol, and isophthalic acid or monoethylene glycol or diethylene glycol or cyclohexane dimethanol or polyethylene naphthalate, nucleating agent, and a modified nanoclay.

Abstract: The present invention relates to a process for preparing transparent polybutylene naphthalate polyester, for improving barrier performance of polyesters used in making of monolayer or multilayer containers, comprising steps of: a) mixing butane diol with polymerization catalysts, monoethylene glycol, color toner, and at least one crystallization suppressing agent, wherein said crystallization suppressing agent controls the rate of crystallization so as to control size and shape of crystals to ensure transparency; b) reacting said mixture with naphthalene dicarboxylic acid or ester thereof to obtain oligomerized product via esterification or ester interchange; c) polymerizing said oligomer using at least one polymerization catalyst to obtain amorphous polybutylene naphthalate polyester chips; d) crystallizing said polybutylene naphthalate polyester chips; and e) subjecting said polyester chips to solid state polymerization to upgrade the intrinsic viscosity (I.V.) up to more than 0.40 dl/gm.

Abstract: The present disclosure relates to a process for preparing polyester. The process for preparing the polyester essentially involves the preparation of the isosorbide oligomer and the isosorbide polymer from the isosorbide oligomer. The isosorbide oligomer or isosorbide polymer is then co-polymerized with the polyester. The copolymerization isosorbide oligomer or isosorbide polymer may be carried out at any stage of the preparation of the polyester. The polyester obtained in accordance with the process of the present disclosure can be used in packaging applications such as preparing packaging materials or containers. The material or container obtained from the polyester of the present disclosure is capable of withstanding a temperature of 60 to 90° C. without undergoing any deformation and shrinkage. Further, the material or container obtained from the polyester of the present disclosure is transparent or has lower color b* value.