terephthalate (Total 7169 Patents Found)

The invention is a novel method for the late introduction of additives into polyethylene terephthalate. The method employs a reactive carrier that functions as a delivery vehicle for one or more additives. The reactive carrier reacts with the polyethylene terephthalate, thereby binding the reactive carrier in the polye...
There is disclosed a process for reducing the acetaldehyde content and the generation rate of acetaldehyde of polyethylene terephthalate chip which has a crystallinity of at least about 30% in order to render the polyethylene terephthalate suitable for making containers which are useful in the carbonated beverage indus...
This invention concerns fibers of amorphous polyesters of terephthalic acid or an ester forming derivative thereof and from about 60 mole percent to 100 mole percent 1,2-propylene glycol and from 0 to about 40 mole percent ethylene glycol. These fibers are useful for the production of bonded coherent cigarette filters,...
The present invention relates to a polycyclohexylenedimethylene terephthalate resin composition having improved reflectivity, heat resistance, and yellowing resistance. The resin composition according to one embodiment of the present invention includes 40 to 95 wt % of polycyclohexylenedimethylene terephthalate resin; ...
The invention relates to a process for making polyethylene terephthalate (PET) from ethylene glycol (EG), purified terephthalic acid (PTA) and optionally up to 6 mol % comonomer, using a mixed metal catalyst system and comprising the steps of a) esterifying EG and PTA to form diethyleneglycol terephthalate and oligomer...
A composition comprising from 10 to 90 weight percent of a copolyetherester elastomer comprising: a modified, random polybutylene terephthalate copolymer block that is derived from a polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate, polyethylene terephthalate copolym...
Disclosed is a method for producing poly(trimethylene terephthalate) (PTT), wherein one or two reactors are employed to simplify production processes. The method for producing poly(trimethylene terephthalate) using one or two reactors or one kneader-type extruder according to the present invention, comprises the steps ...
Process for polycondensing di(alkylene glycol) terephthalate by use of metal compounds as catalysts in which the metal compound is an antimony complex of the formula WHERE X signifies a halogen or thiocyanate, n is a whole number from four to six, preferably, five, and Z is selected from the group consisting of di(py...
An ethylene terephthalate/ethylene-2,6-naphthalene dicarboxylate copolymer comprising 2,6-naphthalenedicarboxylic acid in an amount of 5 to 20 mol % of the total of all dicarboxylic acid components. This copolymer contains Mn, Mg and Co derived from catalysts and P derived from a phosphorus compound as a stabilizer who...
Polyester blends of polyethylene terephthalate and polyethylene isophthalate coated with an alkylene carbonate such as ethylene carbonate or propylene carbonate crystallize more quickly and at lower temperature than uncoated pellets, reducing the tendency of the pellets to stick together during the crystallization proc...
A surface-patterned, injection-molded article of polybutylene terephthalate is produced by placing a film composed mainly of a polybutylene resin and back-printed with a desired graphic and/or indicia pattern in a mold cavity so that the printed surface of the film will be in contact with resin to be injected thereinto...
Polyethylene terephthalate molding compositions are provided which comprise a polyethylene terephthalate having an inherent viscosity of at least 0.4, a plasticizer, a lubricating polymer, a nucleating agent, a reinforcing agent or mixture of reinforcing agent and filler, and a molecular weight reducing agent for the p...
A process for the preparation of polyethylene terephthalate by making use of non antimony catalysts is described. The Ti complex catalyst is pre-dispersed in the polymer matrix selected from PET, PBT, PCTG, PETG, PCT, PEN, PPT, PTT or any other related polyesters and prepared as a master batch. The key feature of the p...
Disclosed are blends of about 99 to about 10 weight % of poly(ethylene terephthalate) and about 1 to about 90 weight % of a polyester of trans-4,4'-stilbenedicarboxylic acid and at least one aliphatic glycol having 2 to 16 carbon atoms. The blends have improved gas barrier properties and improved chemical resistanc...
This invention relates to a poly(ethylene terephthalate)-based photographic film base having improved properties with regard to slitting, perforating, and other finishing or cutting operations. The film base comprises a polyester material in which a specified amount of monomer units derived from 1,4-cyclohexane dimetha...
The invention discloses a preparation method of a flame-retardant molten-drop-resistant PET (polyethylene terephthalate) nano composite material. The preparation method comprises the following steps: adding stronger ammonia water and ammonium carbonate into ethylene glycol, dissolving by stirring, adding zinc oxide, di...
<P>PROBLEM TO BE SOLVED: To provide a polybutylene terephthalate resin composition having well-balanced flexural properties and elastic modulus at a low temperature and excellent hydrolysis resistance and a molded article produced by using the composition. <P>SOLUTION: The polybutylene terephthalate resin ...
The invention discloses a preparation method for a halogen-free flame retardant enhanced polybutylece terephthalate (PBT) material. The halogen-free flame retardant enhanced PBT material consists of the following components in part by weight: 50 to 55 parts of PBT resin, 7 to 10 parts of phosphorus flame retardant or p...
Fibre-forming polyesters with excellent dyeability are prepd. by interesterifying in the melt of (I) 60-95wt.% polyester contg. at least 95 mole-% ethylene terephthalate units, and (II) 40-5wt.% polyester with at least 85 mole-% tetramethylene terephthalate units, and have a m.pt. Tm(in degrees C) of Tmo-5 >=Tm >...
Cette invention a trait à une résine polyester insaturée soluble au styrène, de faible coût, obtenue en utilisant le téréphthalate de polyéthylène recyclé ou vierge. Le PET est d'abord glycolysé à l'aide de glycoles peu coûteux et mis ensuite en réaction avec l'anhydre de l'acide maléique...
Stretch blow-molding machine for making polyethylene terephthalate bottles (H) comprises a heating station (3) for heating the premolds (V). This contains coolers (2) for their neck sections. Stretch blow-molding machine for making polyethylene terephthalate bottles (H) comprises a heating station (3) for heating the p...
Polyester granules are crystallized and dried by passing hot gases of 120° to 190° C. in upward direction through the stationary layer of loose polyester granules resting in a cylindrical container on a plane or conical perforated tray slowly rotating about its vertical axis. The hot gas is passed through the materia...
Ethylene glycol terephthalate oligomer deposits and dyestuff residue are removed from textile dyeing equipment by contacting the deposits and residue with an aqueous composition at a temperature of from about 90° C. to about 140° C.; the aqueous composition consisting essentially of water, an effective amount of a ba...
Poly(ester/carbonates) are produced by adding phosgene to a reaction mixture of bisphenol A and terephthalic acid as ester-forming reactants, at mole ratios in the range between 2.0:0.8 and 2.0:1.3, in which the reaction medium consists essentially of pyridine, the concentration of bisphenol A plus terephthalic acid is...
A biaxially oriented polyethylene terephthalate resin bottle-shaped container, and method of blow molding the same by heating the body portion of a preform at 90° C. to 130° C., biaxial-orientation blow-molding the preform in a primary blowing mold heated at 110° C. to 230° C. to form a primary intermediate molded ...
Adhesive tape useful in supporting an array of parallel optical fibers in an optical transmission cable comprising an adhesive-covered biaxially oriented polyethylene terephthalate film having defined ranges for the proportion of gauche and trans conformations of the ethylene glycol linkages of the polyethylene terepht...
A catalyst composition for use in a polycondensation reaction for making poly(ethylene terephthalate) from terephthalic acid comprising: (a) an antimony salt catalyst present in a range from about 10 to about 1,000 ppm; (b) a metal salt catalyst of at least one of cobalt, magnesium, zinc, manganese, calcium, and lead, ...
Disclosed herein is a novel crystalline form of low molecular weight poly(ethylene terephthalate). This crystalline form may be produced from molten or glassy low molecular weight poly(ethylene terephthalate) material by means of rapid heat transfer to or from the material. The poly(ethylene terephthalate) composition ...
A resin composition comprising a polymer obtained by reacting polyethylene terephthalate with polycarbodiimide, wherein the decomposition rate of polycarbodiimide is from 1% to 40%, has a low decomposition rate of carbodiimide. The resin composition is capable of producing a film having excellent hydrolysis resistance....