Nsk Corporation

Chisso Corporation

Jnc Corporation

Chisso Petrochemical Corporation

Tokimec Inc.

Masami Tanaka

Nobumasa Ootake

Kenya Ito

Mikio Yamahiro

Hisao Oikawa

Takashi Imanishi

Hiroyuki Ikeda

Kenji Furukawa

Yoshinobu Tsujii

Kouji Ishikawa

Takeshi Fukuda

Yasuhiro Yamamoto

Kohji Ohno

Akio Sakai

Takaji Iwasawa

Katsuyuki Yamamoto

Kenichi Watanabe

Nobuo Goto

Shizuo Murata

Kouichi Kunimune

Tomofumi Yamashita

Itsuo Shimizu

Ryuji Kobayashi

Hideki Hashitani

Naoyoshi Emoto

Nobuo Gotoh

Seiichiro Hatase

Kenji Yamada

Yasuyuki Goto

Yutaka Sato

Kazuhiro Yoshida

Hiroyuki Itoh

Hiroki Nishii

Norihisa Kobayashi

Kisei Kitano

Shinji Miyata

Masahiro Fukui

Seiji Higuchi

Kenji Kogure

Takashi Yoshikai

Yuukou Kamamura

Yusaku Satsukawa

Goro Nomura

Kouichi Yokoi

A polymer represented by Formula (7): wherein all variables are defined in the specification, including Pwhich is a polymer chain obtained by polymerizing an addition-polymerizable monomer, which makes it possible to control the structure of the polymer as a molecular aggregate.

Polymer obtained by addition-polymerization initiated by a silicon compound

The present invention provides a silicon compound represented by Formula (1) and a polymer obtained by using the same, and this makes it possible not only to obtain an organic-inorganic composite material having a distinct structure but also to control the structure of the above polymer as a molecular aggregate. wherein Ris a group independently selected from hydrogen, alkyl having a carbon atom number of 1 to 40, substituted or non-substituted aryl and substituted or non-substituted arylalkyl; in this alkyl having a carbon atom number of 1 to 40, optional hydrogens may be substituted with fluorine, and optional &#x2014;CH&#x2014; may be substituted with &#x2014;O&#x2014;, &#x2014;CH&#x2550;CH&#x2014;, cycloalkylene or cycloalkenylene; in alkylene in this arylalkyl, optional hydrogens may be substituted with fluorine, and optional &#x2014;CH&#x2014; may be substituted with &#x2014;O&#x2014; or &#x2014;CH&#x2550;CH&#x2014;; and Ais a group having an &#x3b1;-haloester group.

Silicon compounds

A production process for a silicon compound represented by Formula (6), characterized by reacting a compound represented by Formula (4) with a compound represented by Formula (5): wherein all of the variables are defined in the specification.

Production process for a silicon compound

The object of the present invention is to provide a new kind of silicon compound having an ester-type organic functional group and a new method for providing a T-silsesquioxane compound having a hydroxyl group by using said silicon compound as the starting material. A silicon compound represented by formula (1) is obtained through the production process characterized by using a silicon compound represented by formula (2). wherein:

Silicon compound and a production process for silicon compound

The present invention is a polymer obtained by using a silsesquioxane derivative represented by formula (1-0). In the formula Reach independently represents hydrogen, alkyl, aryl or arylalkyl, and Y each represents a group represented by formula (a) or formula (b). In each of formula (a) and formula (b), at least one of X represents hydrogen, chlorine or a group having one of &#x2014;CH&#x2550;CH&#x2014;, &#x2014;C&#x2261;C&#x2014;, &#x2014;OH, &#x2014;COOH, &#x2014;COO&#x2014;, 2-oxapropane-1,3-dioyl, oxiranyl, oxiranylene, oxetanyl, oxetanylene, 3,4-epoxycyclohexyl, &#x2014;SH, &#x2014;NH&#x2014; and &#x2014;NH, and in formula (b), Z represents &#x2014;O&#x2014;, &#x2014;CH&#x2014; or a single bond. 

Polymer obtained with silsesquioxane derivative

A large part of conventional organic-inorganic composite materials is obtained by mechanical blending silsesquioxanes with organic polymers, and therefore it has been very difficult to control the structure thereof as the molecular aggregate of the composite materials. An object of the present invention is to provide a novel silicon compound having a living radical polymerization-initiating ability for an addition-polymerizable monomer and a polymer obtained using the same to thereby solve the problem described above regarding the conventional organic-inorganic composite materials. The present inventors have found that a novel silsesquioxane derivative to which a group having an ability to initiate polymerization of a monomer is useful as means for solving the problem described above. That is, the silsesquioxane derivative of the present invention is represented by Formula (1): wherein Ris hydrogen, alkyl, aryl or arylalkyl; Rand Rare alkyl, phenyl or cyclohexyl; and A is a group having an ability to initiate polymerization of a monomer.

Silicon compound

The object of the present invention is to provide a new kind of silicon compound having an ester-type organic functional group and a new method for providing a T-silsesquioxane compound having a hydroxyl group by using said silicon compound as the starting material. A silicon compound represented by formula (1) is obtained through the production process characterized by using a silicon compound represented by formula (2). wherein: in formula (1), each of seven Rgroup is independently selected from the group consisting of hydrogen, alkyl, substituted or unsubstituted aryl, and substituted or unsubstituted arylalkyl and Ais a hydroxyl-terminal organic functional group, and in formula (2), each of Rgroup is the same as Rin formula (1), and Ais an organic functional group containing an acyloxy group.

A plurality of projecting portions are provided on and projected from part of an outer peripheral surface of an input side disk. A plurality of transmitting projection pieces are provided on a base end portion of a transmission shaft. The transmitting projection pieces of the transmission shaft are engaged with the projecting portions of the input side disk to thereby be able to transmit torque between the input side disk and the transmission shaft.

Toroidal-type continuously variable transmission and continuously variable transmission apparatus

A toroidal-type continuously variable transmission which includes: a casing; input and output disks respectively including inner surfaces, disposed concentrically with each other inside the casing, and supported so as to rotate independently of each other; a plurality of trunnions each including even-numbered pivot shafts existing at right angles to a central-axis direction of the disks and disposed concentrically with to in parallel to each other, and being swingable about the pivot shafts; a plurality of shift shafts respectively projected out from the trunnions; a plurality of power rollers held by and between respective inner surfaces of the disks so as to be rotatably supported on the shift shafts; and a support member fixed directly to the casing and supporting the pivot shafts so as to be shifted in an axial and an inclined rotation direction thereof.

Toroidal-type continuously variable transmission

A trunnion of a toroidal-type continuously variable transmission has a support plate portion for supporting a displacement shaft and a pair of bent wall portions respectively bent toward the inner surface side of the support plate portion. The support plate portion and the pair of bent wall portions cooperates together in defining a pocket portion for storing a power roller therein. Pivot shafts are disposed concentrically with each other on the outer surfaces of the pair of bent wall portions. The pair of bent wall portions are connected together by a connecting member. The connecting member includes a pressure receive portion contactable with the inner surface of the pocket portion in a direction intersecting substantially at right angles to the thrust direction and receiving a pressing force acting on the pocket portion to crush the pocket portion.

A toroidal-type continuously variable transmission, includes: an input shaft; a pair of mutually opposed input and output disks disposed side-by-side in an axial direction of the input shaft; a pressing mechanism pressing said input disk toward said output disk; a hollow shaft disposed around an outer periphery of the input shaft concentrically with the input shaft, and connecting the pair of input disks to each other; an oil hole formed in a no-penetrating portion of the input shaft where the input shaft does not penetrate through the hollow shaft, and opened on an outer peripheral surface of the no-penetrating portion; and, an oil passage formed between an inner peripheral surface of the hollow shaft and an outer peripheral surface of a penetrating portion of the input shaft where the input shaft penetrates through the hollow shaft.

A toroidal-type continuously variable transmission has: an input shaft; an input side disk and an output side disk respectively disposed on the outer periphery of the input shaft, the input side disk including a first cam surface; and a loading cam device interposed between the input side and output side disks and comprising: a loading cam including a second cam surface and rotatable together with the input shaft; a plurality of rollers interposed rollably between the first cam surface and the second cam surface; and a retainer, the retainer including a retainer main body having a circular-shaped fitting hole, and inside-diameter side projecting portions disposed on a retainer main body for maintaining the attitude of the retainer main body, wherein inside diameters of portions of the fitting hole corresponding to the inside-diameter side projecting portions are larger than that of the remaining portions of the fitting hole.

An inner surfaceof a torque transmitting disc of a toroidal type continuously variable transmission can be finish-worked without also enhancing accuracy of a cylindrical surface as an outer peripheral surface of the disc. The inner surface is finish-worked with super finish while urging a working surface of a grindstone against the inner surface. In this case, roller shoes are rollingly contacted with the inner surface to prevent the disc from being radially displaced under force from the working surface.

Disc for toroidal type continuously variable transmission and working method therefor

A grinding apparatus for grinding a spline ball groove on a workpiece comprises a rod-shaped grindstone, having a distal end portion with a curved surface corresponding to the groove to be ground, and a spindle mechanism for rotating the grindstone. The spindle mechanism and the grindstone are supported by means of a supporter in a manner such that they are inclined at a given angle to an axis of the workpiece. A rotary dresser, which has a dress groove corresponding to the curved surface of the distal end portion of the grindstones is disposed near the grinding apparatus. The grindstone can be reciprocated along the axis of the workpiece by a drive mechanism between the workpiece and the dresser without changing its angle of inclination.

Method and apparatus for forming grooves on a workpiece and for dressing a grindstone used in the groove formation

A grinding apparatus for grinding a spline ball groove on a workpiece comprises a rod-shaped grindstone, having a distal end portion with a curved surface corresponding to the groove to be ground, and a spindle mechanism for rotating the grindstone. The spindle mechanism and the grindstone are supported by means of a supporter in a manner such that they are inclined at a given angle to an axis of the workpiece. A rotary dresser, which has a dress groove corresponding to the curved surface of the distal end portion of the grindstone, is disposed near the grinding apparatus. The grindstone can be reciprocated along the axis of the workpiece by a drive mechanism between the workpiece and the dresser without changing its angle of inclination.

Method for forming grooves on workpiece and for dressing a grindstone used in the groove formation

Growing community of inventors

Kanagawa, Japan

Masami Tanaka