Asahi Kasei Kabushiki Kaisha

Asahi Kasei Kogyo Kabushiki Kaisha

Asahi Kasei Fibers Corporation

Director-general of Agency of Industrial Science and Technology

Agency of Industrial Science and Technology

Jinichiro Kato

Katsuhiro Fujimoto

Toru Morita

Teruhiko Matsuo

Tetsuko Takahashi

Katsuyuki Nakamura

Kensaku Tokushige

Ryu Taniguchi

Satoru Yamazaki

Yoshiaki Nakayama

Shinichi Okajima

Kazuhiko Shimura

Toshio Yoneyama

Kiyoshi Fujieda

Kenji Kanekiyo

Satoru Yoshida

Takao Abe

Takashi Komatsu

Yoichiro Azuma

Kenji Imura

Hitoshi Yamazaki

There is provided a polyketone comprising repeating units, 95-100 mole % of which are 1-oxotrimethylene and having an intrinsic viscosity of 2.5-20 dl/g, wherein the content of Pd element is 0-20 ppm, terminal structures include an alkyl ester group (terminal group A) and an alkyl ketone group (terminal group B), and the equivalent ratio of terminal group A/terminal group B is 0.1-8.0. The polyketone of the present invention can be used in any forms, such as fibers and films, and can be applied to a wide variety of the uses such as clothing, reinforcing materials for rubbers, resins, cements, and optical fibers, electronic materials, battery materials, civil engineering materials, medical materials, daily commodities, fishery materials, and packaging materials.

Polyketone and method for producing the same

Polyketone fibers comprising, on the basis of the entire repeating units, 95% by mole of a repeating unit of the formula (1) shown below, and showing a minimum value (A(F)) of a UV absorbance of 0.5 or less in a wavelength region of 210 to 240 nm.&#x2014;CHCH&#x2014;CO&#x2014; &#x2003;&#x2003;(1)

Polyketone fiber and process for producing the same

Poly(trimethylene terephthalate) composition particles comprising 80% by weight or more of trimethylene terephthalate units based on the entire repeating units, having an intrinsic viscosity from 0.8 to 2 dl/g, and satisfying the following conditions (a) to (c): (a) the composition particles have a particle size of 3 mm or less and a weight of less than 1 mg/particle; (b) the composition particles have a terminal carboxyl group content of 25 meq/kg or less; and (c) the composition particles have a cyclic dimer content of 1.5% by weight or less.

Polytrimethylene terephthalate composition particles and process for producing same

A solution of a polyketone as a copolymer of carbon monoxide and one or more olefins, wherein 90 wt % or more of said copolymer comprises carbon monoxide units and olefin units, and a solvent is an aqueous solution of at least one member selected from the group consisting of zinc salts, calcium salts, thiocyanates and iron salts.

Polyketone solution

The present invention provides a poly(trimethylene terephthalate) pellet comprising 80 wt % or more of trimethylene terephthalate repeating units copolymerized with bis(3-hydroxypropyl) ether at a ratio in a range from 0.01 to 2 wt %, wherein an amount of terminal carboxyl groups is 25 milli-equivalent/kg or less and an intrinsic viscosity is in a range from 0.8 to 2 dl/g, which pellet has an L* value of 75 or more, a b* value in a range from &#x2212;2 to 5, and a weight in a range from 1 to 50 mg/piece.

Poly (trimethylene terephthalate) pellets and method for production thereof

Disclosed are polyketone fibers which contain a ketone unit represented by &#x2014;CHCH&#x2014;CO&#x2014; as a main repeating unit, and have an intrinsic viscosity of not less than 0.5 dl/g, a crystal orientation of not less than 90%, a density of not less than 1.300 g/cm, an elastic modulus of not less than 200 cN/dtex, and a heat shrinkage of &#x2212;1 to 3%. The polyketone fibers are high in strength and elastic modulus, and excellent in fatigue resistance, processability, heat resistance, dimensional stability, and, besides, adhesion, and, therefore, can be applied to the fields which require high fatigue resistance, such as tire cords, belts, hoses, ropes, etc.

An ester-forming monomer obtained by depolymerization of polytrimethylene terephthalate and having an acrolein content of no greater than 0.5 wt %. Polymers obtained using the monomer and fibers, films and molded articles comprising the polymers. The ester-forming monomer is obtained by reacting polytrimethylene terephthalate with at least one compound selected from among monoalcohols, 1,3-propanediol and water in the presence of a basic substance. When the recovered ester-forming monomer is used as the starting material for production of a polymer, it is possible to produce a molding polymer for fibers, films and the like with quality equivalent to or higher than that obtained using virgin monomer.

Ester-forming monomer

Disclosed are polyketone fibers which contain a ketone unit represented by &mdash;CH CH &mdash;CO&mdash; as a main repeating unit, and have an intrinsic viscosity of not less than 0.5 dl/g, a crystal orientation of not less than 90%, a density of not less than 1.300 g/cm , an elastic modulus of not less than 200 cN/dtex, and a heat shrinkage of &minus;1 to 3%. The polyketone fibers are high in strength and elastic modulus, and excellent in fatigue resistance, processability, heat resistance, dimensional stability, and, besides, adhesion, and, therefore, can be applied to the fields which require high fatigue resistance, such as tire cords, belts, hoses, ropes, etc.

Poly (trimethylene terephthalate) and a process for producing the same

A process for producing a polyester fiber by melt spinning a polyester having at least 90% or more by weight of poly(trimethylene terphthalate), the process including rapidly cooling to solidify molten filaments extruded from a spinning nozzle, winding the solidified filaments around a first roll heated at from 30 to 80&deg; C. and having a peripheral speed of from 300 to 3,500 in/mm without the filaments being wound thereon, delivering the filaments to a second roll heated at from 100 to 160&deg; C. to be wound around its peripheral surface, whereby the filaments are drawn at a draw ratio of 1.3 to 4 between the first roll and the second roll having a peripheral speed higher than that of the first roll, and subsequently winding the filaments on a take-up winder having a peripheral speed lower than that of the second roll.

Process for producing a polyester fiber

Polyester resin composition and fiber

Polyester fiber and fabric prepared therefrom

The present invention provides poly(trimethylene terephthalate) copolymerized with ester-forming sulfonate and a fiber thereof. The polymer of the present invention is high in melting point, small in loss of melting viscosity and has a high molecular weight. The fiber of the present invention is high in toughness, excellent in whiteness and dyeable with a cationic dye, whereby it is useful for clothing, carpets or non-woven sheets, etc.

Modified polytrimethylene terephthalate

A polytrimethylene terephthalate fiber, a method for producing the same, a cheese-shaped package formed thereof, a false-twist textured yarn using the fiber and a fabric using the false-twist textured yarn are provided. The fiber is composed of 90 mol % or more of trimethylene terephthalate repeating units having a density in a range from 1.320 to 1.340 g/cm , a birefringence in a range from 0.030 to 0.070, a peak value of thermal stress in a range from 0.01 to 0.12 cN/dtex, a boiling water shrinkage in a range from 3 to 40%, and an elongation at break in a range from 40 to 140%. The inventive polytrimethylene terephthalate fiber has both of proper crystallinity and orientation and is free from the package tightness due to yarn shrinkage and the bulge. The inventive fiber can be produced on an industrial scale.

Growing community of inventors

Nobeoka, Japan

Jinichiro Kato