1734 results about "Polytetramethylene terephthalate" patented technology

Compositions of matter including articles derived from (a) from 5 to 99.99 wt % of a modified polybutylene terephthalate random copolymer that (1) is derived from polyethylene terephthalate and (2) contains a at least one residue derived from polyethylene terephthalate selected from the group consisting of antimony, germanium, diethylene glycol groups, isophthalic acid groups, cis isomer of cyclohexane dimethanol, trans isomer of cyclohexane dimethanol, sodium benzoate, alkali salts, napthalane dicarboxylic acids, 1,3-propane diols, cobalt, cobalt-containing compounds, and combinations thereof, and (b) from 0.01 to 95 wt. % of a member selected from the group consisting of (1) fillers, (2) a carboxy reactive component, (3) polyethyelene terephthalate, (4) a component including a polycarbonate and an impact modifier. The articles may be derived from various conversion processes, e.g., injection molding processes, extrusion processes, thermoforming processes, melt-blown process.

A high strength abrasion resistant surgical suture material with improved tie down characteristics is color coded for visualization and identification purposes. The suture features a multifilament cover formed of strands of ultra high molecular weight long chain polyethylene braided with polybutylene terephthalate. Selected fibers in the cover may be provided in a color contrasting with the other cover fibers to provide an identifiable trace. The cover surrounds a core formed of twisted strands of ultrahigh molecular weight polyethylene. The suture, provided in a #2 size, has the strength of #5 Ethibond, is ideally suited for most orthopedic procedures, and can be attached to a suture anchor or a curved needle.

A composite characterized by comprising an aluminum alloy shaped item having a surface roughness of 5 to 50 μm or more, the surface provided with 1 μm or less fine depressions or protrusions, and a thermoplastic resin composition composed mainly of a polyphenylene sulfide or polybutylene terephthalate resin whose average of lengthwise and crosswise linear expansion coefficients is in the range of 2 to 4×10−5° C.−1, the thermoplastic resin composition penetrating and anchored in the depressions or protrusions. The thermoplastic resin composition is not easily detached from the aluminum alloy shaped item. Thus, in, for example, electronic equipments and household electrical appliances, the advantage of metallic cage body can be reconciled with the advantage of synthetic resin structure. This composite can ensure high production efficiency and is suitable for mass production. Further, morphology and structure designing thereof can be accomplished freely.

The invention relates to a composition comprising (a) from 5 to 99 wt % of a modified polybutylene terephthalate random copolymer that (1) is derived from polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate and polyethylene terephthalate copolymers and (2) has at least one residue derived from the polyethylene terephthalate component, and (b) at least 1 wt % of a filler component. In one embodiment, the invention relates to an article molded from the above-mentioned molding composition. In another embodiment, the invention relates to methods for making and methods for using the molding composition.

Decontaminated crushed polyethylene terephthalate is converted to decontaminated PBT withtout requiring a catalyst by mixing with 1,4-butanediol under reduced pressure, transeterifying at 120-190° C., distilling off ethanediol and tetrahydrofuran under sub-atomspheric pressure. The method lowers costs, and decreases wasteful by-products and removes contaminants present in post-consumer PET, (e.g. paper, pigments, plastics, dyes, mineral sands, and clays) and chemical and water insoluble contaminants.

An IOL injector, comprising an injector body; and a plunger. The plunger comprises a shaft comprising a moldable material having a flexural modulus greater than 600 thousand psi, and a plunger tip. The moldable material may have a flexural modulus greater than 750 thousand psi or greater than 1 million psi. The plunger shaft may comprise, for example, Polybutylene Terephthalate (PBT), Polyphthalamide (PPA) or liquid crystal polymer (LCP).

The invention disclosed herein relates to relates to foamed thermoplastic material objects and articles of manufacture having an internal layered cellular structure, as well as to methods of making the same. In one embodiment, the invention is directed to a multi-layer foamed polymeric article of manufacture, comprising: a non-laminated multi-layer thermoplastic material sheet, wherein the multi-layer thermoplastic material sheet has first and second discrete outer layers sandwiching a plurality of discrete inner foamed layers, and wherein the two outer layers and plurality discrete inner foamed layers are integral with one another. The thermoplastic material may be a semi-crystalline polymer such as, for example, PET (polyethylene terephthalate), PEEK (polyetheretherketone), PEN (polyethylene napthalate), PBT (polybutylene terephthalate), PMMA (polymethyl methacrylate), PLA (polylactide), polyhydroxy acid (PHA), thermoplastic urethane (TPU), or blends thereof. The two outer layers may be unfoamed skin layers having smooth outer surfaces, and the discrete inner foamed layers may be microcellular.

A process for making modified polybutylene terephthalate random copolymers from a polyethylene terephthalate component includes reacting an oligomeric diol component selected from the group consisting of bis(hydroxybutyl)terephthalate, bis(hydroxybutyl)isophthalate, hydroxybutyl-hydroxyethyl terephthalate, and combinations thereof to a reactor; (i) a polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate and polyethylene terephthalate copolymers with (ii) a diol component selected from the group consisting of 1,4-butanediol, ethylene glycol, propylene glycol, and combinations thereof, in the reactor under conditions sufficient to depolymerize the polyethylene terephthalate component into a first molten mixture; combining the first molten mixture is combined with 1,4-butanediol under conditions to form a second molten mixture; and placing the second molten mixture under conditions sufficient to produce the modified polybutylene terephthalate random copolymers. Also described are compositions and articles made from the process.

A process for fabricating a composite vessel includes the steps of: A) preforming (e.g., by winding fiber and at least one thermoplastic substance onto a thermoplastic liner) a thermoplastic shell which has at least one opening for access to the interior; B) extruding a circular cross section of a fluid parison of thermoplastic material (which preferably is chosen to have a melting point lower than that of the thermoplastic shell) into the interior of the thermoplastic shell through the opening; C) in a mold, applying at least one force (such as gas under pressure) which tends to urge the fluid parison toward the interior walls of the thermoplastic shell (which may be preheated prior to introduction into the mold) such that the fluid parison imparts heat to the thermoplastic shell; D) continuing step C) until the thermoplastic shell and the fluid parison consolidate to form a composite vessel; E) cooling the vessel until it is solidified; and F) removing the vessel from the mold. For some composite vessels, prior to step C), an insert may be introduced into the interior of the parison and positioned in alignment with the opening in the thermoplastic shell such that the insert is rendered integral with the composite vessel during step D). Suitable thermoplastic materials include polyethylene, polypropylene, polybutylene terephthalate and polyethylene terephthalate. The resulting composite vessel exhibits superior mechanical and aesthetic properties.

The invention relates to a process for making modified polybutylene terephththalate random copolymers from a polyethylene terephthalate component. The invention relates to a three step process in which a diol component selected from the group consisting of ethylene glycol, propylene glycol, and combinations thereof reacts with a polyethylene terephthalate component under conditions sufficient to depolymerize the polyethylene terephthalate component into a first molten mixture; and where the first molten mixture is combined with 1,4-butanediol under conditions that create a second molten mixture that is subsequently placed under subatmospheric conditions that produce the modified polybutylene terephthalate random copolymers. The invention also relates to compositions made from the process.

The invention discloses parallel composite elastic fiber and a manufacture method thereof. The parallel composite elastic fiber is obtained through false twisting process after parallel composite spinning of valox and polyethylene glycol terephthalate according to a weight ratio of 70 / 30 to 30 / 70, wherein the inherent viscosity of the valox is between 0.45 to 0.60 dl / g, and the difference of the inherent viscosity of the valox and the inherent viscosity of the polyethylene glycol terephthalate is between 0.40 and 1.05 dl / g. The elastic extensibility of the elastic fiber of the invention is between 130 and 220 percent, and the elastic recovery rate is higher than 85 percent.

A composition comprises, based on the total weight of the composition: from 10 to 80 wt. % of a modified polybutylene terephthalate copolymer that (1) is derived from polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate and polyethylene terephthalate copolymers and (2) has at least one residue derived from the polyethylene terephthalate component; from 10 to 80 wt. % of a polycarbonate; from 0 to 20 wt. % of an impact modifier; from 1 to less than 25 wt. % of a reinforcing filler; from 0.1 to less than 2.5 wt. % of a fibrillated fluoropolymer; from 0 to 5 wt. % of an additive selected from the group consisting of antioxidants, mold release agents, colorants, quenchers, stabilizers, and combinations thereof. The composition has a heat deflection temperature of at least 110° C., measured in accordance with to ASTM D648 on 3.2 mm thick molded bars at 0.455 MPa.

A nano-class toughened and strengthened butanediol polyterephthalate composition is prepared through proportionally mixing butanediol polyterephthalate, inorganic nanoparticles, reaction compatibilizer, antioxidizing agent, and lubricant, high-speed stirring, loading it along with glass fibres in dual-screw extruder, reactive mixing and granulating. Its advantage is high high-temp resistance, strength, toughness and surface polished.

The present invention relates to hybrid impact modifiers prepared by:either spray drying, coagulation, freeze coagulation or other known recovery methods of a mixture of a latex or slurry of standard impact modifiers and a slurry of a mineral filler,either simultaneous drying (by spray-drying, coagulation other known recovery possible methods) of (i) a latex or slurry of standard impact modifiers and of (ii) a slurry of a mineral filler,further to the coagulation or freeze coagulation, if any, there is a filtration and drying step to recover these hybrid impact modifiers as a powder.The host polymers to be impact modified, can be any thermoplastic. Advantageously it can be polyvinyl chloride (PVC), polyamide (PA), polymethyl methacrylate (PMMA), polystyrene (PS), polycarbonate (PC), thermoplastic polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycyclohexanedimethanol terephthalate, and polyolefins such as polyethylene (PE), polypropylene (PP), and any other matrix polymer which can be improved by an impact modifier.The present invention also relates to the use of said hybrid impact modifiers in thermoplastic polymers.The present invention also relates to a thermoplastic polymer containing said hybrid impact modifiers.The present invention also relates to hybrid impact modifiers having improved powder properties (flowability, lumping / caking resistance, segregation between the organic and the mineral parts).The present invention also relates to a thermoplastic polymer containing said hybrid impact modifiers with better dispersion homogeneities.

A molding composition comprising: (a) from 5 to 90 wt. % of a modified polybutylene terephthalate random copolymer that (1) is derived from polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate and polyethylene terephthalate copolymers and (2) has at least one residue derived from the polyethylene terephthalate component, and (b) from 5 to 90 wt. % of a polycarbonate component; and from at least 1 wt. % of an impact modifier component, wherein the modified polybutylene terephthalate random copolymer, the polycarbonate component, the impact modifier, and optionally at least one additive, have a combined weight % of 100 wt %. The invention also encompasses methods for making the composition and articles made from the composition.

A laser weldable PBT-series resin composition comprises a polybutylene terephthalate (PBT)-series resin (A), and at least one resin (B) selected from the group consisting of a polycarbonate-series resin (b1), a styrenic resin (b2), a polyethylene terephthalate-series resin (b3) and an acrylic resin (b4). The PBT-series resin (A) may be a PBT homopolyester, or a PBT-series copolymer modified with not more than 30 mol % of a copolymerizable monomer (e.g., a bisphenol compound or an adduct thereof with an alkylene oxide, and an asymmetrical aromatic dicarboxylic acid). The ratio (weight ratio) of the resin (B) relative to the PBT-series resin (A) [the former / the latter] is about 0.1 / 1 to 1.5 / 1. The resin composition may comprise a glass fiber. The resin composition is excellent in laser weldability, and can improve in welding strength of a shaped article formed from the resin composition.

A process for producing polybutylene terephthalate comprises contacting terephthalic acid or its salt or its ester and butylenes glycol, in the presence of a catalyst composition, which comprises, or is produced from, titanium or a titanium compound, a complexing agent, a phosphorus-containing ester, and optionally a solvent. The process can also comprise contacting terephthalic acid or its salt or its ester and a glycol, in the presence of a catalyst composition to produce an oligomer and contacting the oligomer with a phosphorus-containing ester in which the catalyst composition can be one that catalyzes esterification or transesterification or polycondensation.

A molding composition comprising (a) from 5 to 90 wt % of a modified polybutylene terephthalate random copolymer that (1) is derived from polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate and polyethylene terephthalate copolymers and (2) at least one residue derived from the polyethylene terephthalate component, and (b) from 5 to 40 wt % of a polyalkylene terephthalate component; wherein the modified polybutylene terephthalate random copolymer, the polyalkylene terephthalate component, and optionally, at least one additive, have a combined weight % of 100 wt %. Methods for making the composition and articles made from the composition.

The invention provides a preparation method of functional polyester fibers. The preparation method mainly comprises the following two steps of: firstly, mixing functional powders, polybutylene terephthalate cyclic oligomer (CBT) and a dispersing agent, performing reactive extrusion on the mixture by double screws to prepare a polybutylene terephthalate (PBT) functional master batch, wherein the functional powders are one of or several of a carbon nano tube, nano titanium dioxide, tourmaline powders, a nano-silver antibacterial agent, a nano silicon oxide and fluorescent powders; and secondly, blending and spinning the master batch, the PBT, polyethylene glycol terephthalate (PET) or polytrimethylene terephthalate (PTT) to prepare the functional polyester fibers. According to the method, the reactive extrusion process is adopted, the operation is simple and convenient, the process flow is shortened greatly, the obtained PBT functional master batch contains 30wt%-40wt% of the functional powders, and can be well dispersed in a base body, the compatibility of the obtained functional master batch and polyester polymer is good, and the fiber obtained by the method has an obvious functional effect.

A polybutylene terephthalate laminate film having excellent shape memory and high-temperature dimensional stability obtained by (1) subjecting a laminate film comprising a polybutylene terephthalate film and another film or film laminate to a shaping treatment at a temperature T1 equal to or lower than the glass transition temperature of said polybutylene terephthalate while maintaining a first shape; (2) deforming the shaped laminate film to a second shape at a temperature T2 higher than said glass transition temperature; and (3) cooling said laminate film to a temperature T3 equal to or lower than said glass transition temperature.

The invention discloses a flame-retardant polybutylece terephthalate resin composition with high glow wire ignition temperature, which consists of polybutylece terephthalate, a synergistic resin with high GWIT, a flame retardant, a flame-retardant synergistic agent, an inorganic filler, a toughener, a main antioxidant, an auxiliary antioxidant, an anti-dripping agent, and glass fiber. The composition has good flame-retardant effect and fireproof performance, and high glow wire ignition temperature.

Polybutylene terephthalate having good heat stability and excellent hydrolysis resistance is continuously produced in a series of a first reactor for reacting an aromatic dicarboxylic acid comprising terephthalic acid as a main ingredient or a derivative thereof with a glycol comprising 1,4-butanediol as a main ingredient, thereby producing an oligomer with an average degree of polymerization of 2.2 to 5, a second reactor for polycondensating the oligomer from the first reactor, thereby preparing a low polymerization product with an average degree of polymerization of 25 to 40, and a third reactor for further polycondensating the low polymerization product from the second reactor, thereby producing a high molecular weight polyester with an average degree of polymerization of 70 to 130, or followed by a fourth reactor for further polycondensing the polyester from the third reactor to an average degree of polymerization of 150 to 200, thereby producing a high molecular weight polyester. Another third reactor or a plurality of third reactors can be provided in parallel to the third reactor, thereby producing different kinds of polybutylene phthalate with different degrees of polymerization from that produced in the main line of the third and fourth reactors or adjusting operating conditions of each of a plurality of the third reactors to increase kinds, precise quality.

A tray for handling and retaining a plurality of small components comprising a rigid body portion with a plurality of pockets formed therein. Each of the pockets has an elastomeric contact surface for contacting and retaining a component. The contact surface may be formed from a thermoplastic material having a surface energy between 20 dyne / cm and 100 dyne / cm, and a surface electrical resistivity of between about 1×104 ohms / square and 1×1012 ohms / square. The material for the contact portion may be urethane, polybutylene terephthalate, polyolefin, polyethylene terephthalate, styrenic block co-polymer, styrene-butadiene rubber, polyether block polyamide, or polypropylene / crosslinked EDPM rubber. The body portion may be formed from acrylonitrile-butadiene-styrene, polycarbonate, urethane, polyphenylene sulfide, polystyrene, polymethyl methacrylate, polyetherketone, polyetheretherketone, polyetherketoneketone, polyether imide, polysulfone, styrene acrylonitrile, polyethylene, polypropylene, fluoropolymer, polyolefin, or nylon. The body portion may have a peripheral border region and a downwardly projecting skirt portion to facilitate stacking of multiple trays.

A colored resin composition for laser welding which comprises: (A) a polybutylene terephthalate based resin comprising polybutylene terephthalate or polybutylene terephthalate and a polybutylene terephthalate copolymer, (B) at least one kind of resin selected from polycarbonate resins, styrene based resins and polyethylene terephthalate resins, and (C) two or more kinds of organic pigments, wherein the resin (B) accounts for 1 to 50% by weight of the total amount of the polybutylene terephthalate based resin (A) and the resin (B), the pigment (C) is included in an amount of 0.02 to 0.5 parts by weight per 100 parts by weight of the total amount of the polybutylene terephthalate based resin (A) and the resin (B), laser beam transmittance in the near infrared radiation region of the wavelength of 800 nm to 1100 nm is 10% or greater when it is measured with a sample thickness of 3 mm, and L value which indicates the luminosity is less than 50.