Abstract:
A method for producing an aromatic polymer comprising polycondensing an aromatic compound of the following formula (I) in the presence of a palladium complex containing a phosphine compound of the following formula (II): (wherein, Ar represents an aromatic ring-containing bi-functional organic group. X represents a halogen atom, nitro group or group of the formula —SO3Q (wherein, Q represents an optionally substituted hydrocarbon group). Y represents an oxygen atom, sulfur atom or the like, and n represents 0 or 1. M represents a hydrogen atom, —B(OQ1)2 or the like (Q1 represents a hydrogen atom or hydrocarbon group.) P(R1)3 (II) (wherein, R1 represents a group of the following formula (III) or a group of the following formula (IV) and three R1s may be the same or different, providing at least one of three R1s is a group of the following formula (III)) —C(R2)3 (III) (wherein, R2 represents a hydrogen atom or an optionally substituted hydrocarbon group) (wherein, R3 to R7 represent each independently a hydrogen atom, optionally substituted hydrocarbon group or the like).
Abstract:
Disclosed is a method for producing an aromatic polymer characterized in that an aromatic compound represented by the formula (I) below is polycondensed in the presence of a palladium complex containing a phosphine compound represented by the formula (II) below. (I) (In the formula (I), Ar represents a bifunctional organic group containing an aromatic ring; X represents a halogen atom, a nitro group or a group expressed as —SO3Q (wherein Q is an optionally substituted hydrocarbon group); Y represents an oxygen atom, a sulfur atom or the like; n is 0 or 1; and M represents a hydrogen atom, a —B(OQ1)2 group (wherein Q1 is a hydrogen atom or a hydrocarbon group) or the like.) P(R1)3 (II) (In the formula (II), R1 represents a group represented by the formula (III) below or a group represented by the formula (IV) below, and three R1s may be the same as or different from one another, provided that at least one of R1s is a group represented by the formula (III) below.) —C(R2)3 (III) (In the formula (III), R2 represents a hydrogen atom or an optionally substituted hydrocarbon group.) (IV) (In the formula (IV), R3-R7 independently represent a hydrogen atom, an optionally substituted hydrocarbon group or the like.)
Abstract:
Provided is a screw device capable of preventing occurrence of any elevation change at a joint between a ball return path of a circulation member and a loaded ball rolling groove of a nut.The circulation member 12 has end parts 14 and 15 each of which the periphery includes a rolling groove connecting part 22 positioned to the side of a loaded ball rolling groove 11a of a nut 11 and connected to the loaded ball rolling groove 11a of the nut 11 and a scooping part 23 positioned to the side of a ball rolling groove of a screw shaft 1 and scoops up balls 3 from a loaded ball rolling path. The rolling groove connecting part 22 of each of the end parts 14 and 15 is made of resin and formed integral with the nut 11.
Abstract:
A vibration damping device for use in a automotive suspension system, adapted to be disposed at a linking portion between a body of the vehicle and a suspension member that connects and supports a wheel on the body is disclosed. The vibration damping device comprises a load sensing unit adapted to sense a signal corresponding to a load exerted between the body and the suspension member. A suspension system equipped with the same is also disclosed.
Abstract:
[Problems]To provide a lost-wax cast impeller for a supercharger having no parting line corresponding part on a hub surface and a blade surface in each space demarcated by pairs of long blades adjacent to each other and having excellent aerodynamic performance. [Means for Solving Problems]This method of manufacturing the impeller comprises a step for forming a lost form pattern formed in the substantially same shape as the impeller for the supercharger, a step for forming a mold by eliminating and removing the lost form pattern after the lost form pattern is coated with a refractory, and a step for pouring a molten metal in the mold for casting. In the step for molding the lost form pattern, a lost material is injection-molded in a space demarcated by radially arranging, toward a center shaft, a plurality of slide molds having short blade-shaped bottomed groove parts and space shapes between the pairs of long blades adjacent to each other, and the slide molds are released by moving in the radial direction of the center shaft while rotating. Thus, the parting line corresponding part is not present on any of the hub surface and the blade surface in the spaces demarcated by the pairs of long blades adjacent to each other.
Abstract:
In order to couple and fix a first chassis and a second chassis, the first chassis is positioned relative to the second chassis. Then, coupling members are inserted into pairs of first and second coupling grooves, respectively. The first chassis has the first coupling grooves provided in upper portions of the first chassis and extending from a front wall along side walls, respectively, and the second chassis having second coupling grooves provided in lower portions of the second chassis and extending from a front wall along side walls, respectively. Finally, the coupling members are fixed to both of the first chassis and the second chassis.
Abstract:
A lithographic printing plate precursor, comprising a support having thereon an image-recording layer containing (A) an infrared absorbing agent, (B) a radical polymerization initiator, (C) a radical polymerizable compound, (D) a polymer compound containing a polyoxyalkylene structure and (E) an ultraviolet absorbing agent and being capable of forming an image by supplying at least one of printing ink and dampening water on a printing machine after imagewise exposure to remove an unexposed area of the image-recording layer.
Abstract:
A detection method for at least one of acting forces on tire among a back-and-forth directional force, a lateral force, vertical force, and a moment about a tire axis, detects the forces by strain outputs of strain sensors, which are attached on the tire and measure the strains of a sidewall portion. The method includes a strain measuring step to measure the strain of the sidewall portion with each of the above-mentioned strain sensors simultaneously at the rotational position P based on the tire rotational standard position X and to obtain the strain output per each strain sensor, and an acting force calculating step to calculate the above-mentioned force acting on the tire based on the strain output per strain sensor obtained on this strain measuring step.
Abstract:
A runflat tire system comprises a pneumatic tire, a wheel rim on which the pneumatic tire is mounted, and a support ring made of an elastic material and disposed in a cavity surrounded by an inner surface of the rim and an inner surface of the tire mounted thereon, wherein the support ring comprises an annular body extending in a circumferential direction of the tire and being provided with a plurality of recesses each opening at the cavity, and at least two sound reflectors each being attached to the recess and including an outer surface made of a non-porous material so as to reflect sound in the cavity.
Abstract:
There will be provided a printing method for block copy film and a block copy printer capable of adjusting printing density as occasion arises as well as making joints between print lines inconspicuous. A predetermined mount of conveyance of transparent resin film P will be set to 1/N (N is an integer of 2 or more) of a predetermined printing width, which is a line-up width of the exothermic elements, and printing at a predetermined printing width will be repeated after the transparent resin film P is conveyed in the predetermined amount of conveyance.