Sabic Global Technologies B.v.

Saudi Basic Industries Corporation

Sabic Innovative Plastics IP B.v.

Husnu Alp Alidedeoglu

Ganesh Kannan

Tianhua Ding

Prashant Kumar

Tukaram Gunale

Robert Russell Gallucci

Mark Erik Nelson

Bing Zhou

Darshan Jayanna

Cornelis Adrianus Maria Van Gool

Belinda Duckworth

Sasi Sethumadhavan Kannamkumarath

Osit Karroonnirun

Brian Bougher

Kenneth F Miller

Manojkumar Chellamuthu

Hareesh Shamrao Deshpande

Yuzhen Yang

Donald E Owens, Iii

Hareesh Shamroa Deshpande

Keshavaraja Alive

The present invention relates to a process for the production of a thermoplastic polyester using a reaction mixture comprising a dicarboxylic acid having a melting temperature of &#x2265;200&#xb0; C. wherein the dicarboxylic acid is introduced to the process in the form of particles having an average particle diameter of &#x2265;100 &#x3bc;m. Such process results in a reduction of the polymerisation time. Furthermore, it allows for the production of thermoplastic polyesters having a desired balance of intrinsic viscosity and carboxylic end group content at a reduced polymerisation time.

Process for the production of thermoplastic polyester

A device for making polybutylene terephthalate includes (1) a slurry paste vessel; (2) a tower reactor to which a mixture of 1,4-butane diol and terephthalic acid from vessel (1) is supplied, the tower reactor having a plurality of reactor zones wherein the lower third of the tower reactor is in the form of a hydrocyclone with attached heat exchanger, and the hydrocyclone has a supply line from vessel (1), the hydrocyclone being connected to the top side of the tower reactor; (3) a first continuously stirred tank reactor to which the product from tower reactor (2) is supplied; (4) an optional second continuously stirred tank reactor to which the product from (3) is supplied; (5) a dual shaft ring reactor to which the product from stirred tank reactor (3) or (4), is supplied; and (6) a pelletizer where the product from dual shaft ring reactor (5) is continuously fed and pelletized.

Continuous process for making polybutylene terephthalate using purified terephthalic acid and 1,4-butane diol

The present invention relates to a thermoplastic composition with improved hydrolytic stability, comprising: 30 to 50 percent by weight of a polybutylene terephthalate (PBT) having a carboxylic end group concentration (CEG) of 40 to 120 mmol/kg and an intrinsic viscosity of 0.63 to 0.68 dl/g as measured in a 60:40 phenol/tetrachloroethane; 0.01 to 0.1 percent by weight of a catalyst; 0.01 to 5 percent by weight of an epoxy chain extender; wherein all weight percents are based on the total weight of the composition.

Polybutylene terephthalate composition with improved hydrolytic stability

A process for preparing polybutylene terephthalate (PBT) which includes step of melting solid PBT oligomer having an IV of between 0.13 and 0.17 dL/g and a CEG of between 90 and 180 mmol/kg; and further step of the PBT oligomer polycondensation; wherein the polycondensation process is carried out continuously using a melt tank for melting oligomers, one or more reactors for post-condensation processing, and one or more finishing reactors to increase molecular weight. The resulting PBT has an intrinsic viscosity (IV) of between 0.5 and 1.3 dl/g and a carboxylic end group (CEG) concentration of between 1 and 75 mmol/kg.

Continuous process for making polybutylene terephthalate

A batch process for preparing polybutylene terephthalate (PBT) includes heating a solid PBT oligomer having an intrinsic viscosity (IV) of 0.1 to 0.2 dL/g and a carboxylic acid end group concentration [CEG] of 90 to 180 mmol/kg at a temperature and pressure defined herein to form melted homogeneous PBT oligomer containing 0 to 300 ppm tetra(C-Calkyl) titanate catalyst, and polycondensing the melted homogeneous PBT oligomer in the presence of a tetra(C-Calkyl) titanate catalyst, reducing the pressure, and maintaining the temperature at approximately 245-260&#xb0; C. for a sufficient time to provide PBT having an IV of 0.55 and 1.20 dL/g. The PBT oligomer can be prepared by heating a mixture of 1,4-butane diol and purified terephthalic acid in the presence of a tetra(C-Calkyl) titanate catalyst.

Batch process for making polybutylene terephthalate

Disclosed is a continuous process and device for making polybutylene terephthalate (PBT) resin, particularly high molecular weight PBT resin. The process includes combining 1,4-butane diol and purified terephthalic acid to form a mixture and continuously supplying the mixture to a tower reactor having a plurality of reactor zones for esterification and/or transesterification. The product is continuously supplied to a first continuously stirred tank reactor, and further to a continuous polycondensation reactor. Particular conditions for each step of the process are further described herein. Also disclosed are a device for conducting the process, and a monitoring process for determining the carboxylic acid end group concentration of the resulting PBT.

A process for making oligomers of polybutylene terephthalate (PBT) with desirable intrinsic viscosity and carboxylic end group concentrations includes combining 1.4-butane diol (BDO). terephthalic acid and a catalyst to from a mixture and heating the mixture until the clearing point is reached based on visual inspection. The PBT oligomers are used in a continuous process for making polybutylene terephthalate (PBT) resin.

Process for making polybutylene terephthalate oligomers

Disclosed is a process for the manufacture of a polyalkylene terephthalate such as polybutylene terephthalate. In particular, the process comprises employing a titanium-containing catalyst formed by the reaction product of tetraalkyl titanate and a complexing agent comprising a phosphorous, nitrogen or boron atom. The process is used to prepare polyalkylene terephthalates characterized by improved hydrostability, as well as compositions derived therefrom.

Hydrostability of polycarbonate polyester composition

Disclosed is a process for the manufacture of a modified polyalkylene terephthalate such as modified polybutylene terephthalate. In particular, the process comprises employing a titanium-containing catalyst formed by the reaction product of tetraalkyl titanate and a complexing agent comprising a phosphorous, nitrogen or boron atom. The process is used to prepared modified polyalkylene terephthalates characterized by improved hydrostability, as well as compositions and compositions derived therefrom.

Hydrostability of polycarbonate polybutylene terephthalate composition

Disclosed is a modified endcapped polyalkylene terephthalate such as modified endcapped polybutylene terephthalate, as well as processes for making the modified endcapped polybutylene terephthalate and compositions and articles derived therefrom.

Modified endcapped poly(alkylene terephthalate) prepared by employing an in situ titanium-containing catalyst and compositions derived therefrom

Biodegradable compositions containing an aliphatic-aromatic copolyester derived from aromatic polyesters. Methods of making the compositions and articles made from the compositions.

Biodegradable aliphatic-aromatic copolyesters, compositions thereof, methods of manufacture, and articles thereof

This disclosure relates to an aliphatic-aromatic copolyester of poly(butylene-co-adipate terephthalate) that is prepared from recycled polyethylene terephthalate in the presence of titanium catalyst and a phosphorous containing compound. The copolyester is contaminated with little or no ethylene glycol and/or isophthalic acid, which are artifacts of preparing the copolyester from recycled PET. Advantageously, because there is little or no contamination from ethylene glycol and/or isophthalic acid in the copolyester, there is essentially no depression in the material's melting temperature.

Poly(alkylene co-adipate terephthalate) prepared from recycled polyethylene terephthalate having low impurity levels

Disclosed is a process for the manufacture of a modified polyalkylene terephthalate such as modified polybutylene terephthalate. In particular, the process comprises employing a titanium-containing catalyst formed by the reaction product of tetraalkyl titanate and a complexing agent comprising a phosphorous, nitrogen or boron atom. The process is used to prepare modified polyalkylene terephthalates characterized by improved hydrostability, as well as compositions derived therefrom.

Hydrostability of polybutylene terephthalate composition

Hydrostability of polyester composition

Biodegradable compositions containing an aliphatic-aromatic copolyester derived from aromatic polyesters. Methods of making the compositions through an in situ phosphorus containing titanium based catalyst and articles made from the compositions.

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Evansville, IN, United States of America

Husnu Alp Alidedeoglu