Patent application number | Description | Published |
20080242830 | Lower-color polytrimethylene ether glycol using hydride compounds - The present invention relates to a process for preparing lower-color polytrimethylene ether glycol, comprising contacting said polytrimethylene ether glycol, or its precursor reaction-mixture, with a hydride compound during at least one stage of the process of manufacture, or on the polytrimethylene ether glycol resulting form such process, such that the polytrimethylene ether glycol demonstrates a reduced color (as compared to using no hydride compound). | 10-02-2008 |
20080242831 | Lower-color polytrimethylene ether glycol using zero-valent metals - The present invention relates to a process for preparing lower-color polytrimethylene ether glycol polymer, comprising contacting said polytrimethylene ether glycol polymer, or its precursor reaction-mixture, with a zero-valent metal during at least one stage of the process of manufacture, or on the polytrimethylene glycol resulting form such process, such that the polytrimethylene ether glycol polymer demonstrates a reduced color (as compared to using no zero-valent metal). | 10-02-2008 |
20100204436 | PROCESS FOR PREPARING POLY(TRIMETHYLENE ETHER) GLYCOL AND COPOLYMERS THEREOF - Processes for preparing relatively high molecular weight poly(trimethylene ether)glycol employing a cocatalyst system are provided. | 08-12-2010 |
20100204439 | PROCESSES FOR MAKING POLY(TRIMETHYLENE ETHER) GLYCOL USING ORGANOPHOSPHOROUS COMPOUND - Processes for preparing poly(trimethylene ether)glycol-based polymers using an organophosphorous compound are provided. | 08-12-2010 |
20130009333 | PROCESS FOR MAKING NONWOVEN WEBS - A nonwoven web comprising bicomponent fibers. The fibers have continuous phases each of a first polyarylene sulfide (PAS) component and a polymer component. The polymer component may also be a second polyarylene sulfide. The first polyarylene sulfide component contains a tin or a zinc additive or both, and the first polyarylene sulfide component of any given fiber is at least partially exposed to the external surface of that fiber. | 01-10-2013 |
20130011544 | STABILIZATION OF POLYMERIC STRUCTURES - A method for stabilizing a polymeric structure against thermo-oxidative degradation is described. A polymeric core structure is provided with a skin layer that contains a skin resin in which the skin resin at least partially envelops a portion of the core structure. The skin structure then provides a barrier that thereby stabilizes the portion of the structure that is enveloped. The skin resin is made from a treated polyarylene sulfide. | 01-10-2013 |
20130012092 | STABILIZATION OF POLYMERIC STRUCTURES - A nonwoven web comprising bicomponent fibers. The fibers have continuous phases each of a first polyarylene sulfide (PAS) component and a polymer component. The polymer component may also be a second polyarylene sulfide. The first polyarylene sulfide component contains a tin or a zinc additive or both, and the first polyarylene sulfide component of any given fiber is at least partially exposed to the external surface of that fiber. | 01-10-2013 |
20130012638 | METHODS OF DECREASING VISCOSITY OF A POLYARYLENE SULFIDE-CONTAINING POLYMER MELT - This invention relates to methods for decreasing the complex viscosity of a polyarylene sulfide polymer melt while maintaining the molecular weight of the polyarylene sulfide with time. This invention also relates to polymer melt compositions comprising a polyarylene sulfide, wherein the complex viscosity of the composition is decreased relative to the complex viscosity of the native polyarylene sulfide measured under the same conditions, and the weight average molecular weight of the polyarylene sulfide is maintained. The methods of decreasing the complex viscosity of a polyarylene sulfide-containing polymer melt, and the polymer melt compositions so obtained, are useful in processes to produce fibers, films, nonwovens, and molded parts from polyarylene sulfides. | 01-10-2013 |
20130012671 | CURE ACCELERATION OF POLYMERIC STRUCTURES - A method for accelerating the curing of a polyarylene sulfide. The polyarylene sulfide is blended with a cure accelerator to form a mixture where the weight percentage of accelerator is between 0.2% and 15.0% of the total weight of the blend. The mixture is cured at 320° C. or above for at least 20 minutes. The cure accelerator is a compound selected from the group consisting of ionomers, hindered phenols, polyhydric alcohols, polycarboxylates, and mixtures of the foregoing. | 01-10-2013 |
20130210307 | POLYARYLENE SULFIDE COMPOSITIONS - Provided are novel compositions comprising a polyarylene sulfide and at least one tin additive comprising a branched tin(II) carboxylate selected from the group consisting of Sn(O | 08-15-2013 |