| GRUPO PETROTEMEX, S.A. DE C.V. Patent applications |
| Patent application number | Title | Published |
|---|
| 20120101249 | HIGH IV MELT PHASE POLYESTER POLYMER CATALYZED WITH ANTIMONY CONTAINING COMPOUNDS - A melt phase process for making a polyester polymer melt phase product by adding an antimony containing catalyst to the melt phase, polycondensing the melt containing said catalyst in the melt phase until the It.V. of the melt reaches at least 0.75 dL/g. Polyester polymer melt phase pellets containing antimony residues and having an It.V. of at least 0.75 dL/g are obtained without solid state polymerization. The polyester polymer pellets containing antimony residues and having an It.V. of at least 0.70 dL/g obtained without increasing the molecular weight of the melt phase product by solid state polymerization are fed to an extruder, melted to produce a molten polyester polymer, and extruded through a die to form shaped articles. The melt phase products and articles made thereby have low b* color and/or high L* brightness, and the reaction time to make the melt phase products is short. | 04-26-2012 |
| 20120010383 | THERMAL CRYSTALLIZATION OF A MOLTEN POLYESTER POLYMER IN A FLUID - A process for crystallizing a polyester polymer by introducing a molten polyester polymer, such as a polyethylene terephthalate polymer, into a liquid medium at a liquid medium temperature greater than the T | 01-12-2012 |
| 20110318519 | POLYESTER BLENDS EXHIBITING LOW TEMPERATURE TOUGHNESS - Polymer blends suitable for packaging are disclosed that include one or more impact modifiers; and one or more polyethylene terephthalate homopolymers or copolymers obtained by a melt phase polymerization using a catalyst system comprising aluminum atoms in an amount, for example, from about 3 ppm to about 60 ppm and one or more alkaline earth metal atoms, alkali metal atoms, or alkali compound residues in an amount, for example, from about 1 ppm to about 25 ppm, in each case based on the weight of the one or more polyethylene terephthalate homopolymers or copolymers The polymer blends disclosed exhibit improved low temperature toughness compared with blends made using polymers prepared with conventional catalyst systems. | 12-29-2011 |
| 20110281049 | ALUMINUM/ALKYLINE OR ALKALI/TITANIUM CONTAINING POLYESTERS HAVING IMPROVED REHEAT, COLOR AND CLARITY - A polyester composition containing:
| 11-17-2011 |
| 20110256037 | OPTIMIZED LIQUID-PHASE OXIDATION - Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reaction at relatively low temperatures. When the oxidized compound is para-xylene and the product from the oxidation reaction is crude terephthalic acid (CTA), such CTA product can be purified and separated by more economical techniques than could be employed if the CTA were formed by a conventional high-temperature oxidation process. | 10-20-2011 |
| 20110251340 | PRODUCTION OF NON-SOLID-STATED POLYESTER PARTICLES HAVING SOLID-STATED PROPERTIES - A process for producing non-solid-stated polyester polymer particles having one or more properties similar to polyester polymer particles that have undergone solid-state processing. | 10-13-2011 |
| 20110201752 | HIGH IV MELT PHASE POLYESTER POLYMER CATALYZED WITH ANTIMONY CONTAINING COMPOUNDS - A melt phase process for making a polyester polymer melt phase product by adding an antimony containing catalyst to the melt phase, polycondensing the melt containing said catalyst in the melt phase until the It.V. of the melt reaches at least 0.75 dL/g. Polyester polymer melt phase pellets containing antimony residues and having an It.V. of at least 0.75 dL/g are obtained without solid state polymerization. The polyester polymer pellets containing antimony residues and having an It.V. of at least 0.70 dL/g obtained without increasing the molecular weight of the melt phase product by solid state polymerization are fed to an extruder, melted to produce a molten polyester polymer, and extruded through a die to form shaped articles. The melt phase products and articles made thereby have low b* color and/or high L* brightness, and the reaction time to make the melt phase products is short. | 08-18-2011 |
| 20110184130 | POLYESTER PRODUCTION SYSTEM EMPLOYING HORIZONTALLY ELONGATED ESTERIFICATION VESSEL - A polyester production process employing an esterification system that utilizes a horizontally elongated esterification vessel as an esterification reactor and/or a vapor-liquid disengagement vessel. | 07-28-2011 |
