Abstract:
An optical part comprising a thermoplastic resin having a recurring unit represented by the following formula (1): wherein R represents a hydrogen atom, an alkyl group, or an aryl group; G represents a divalent linking group; A represents an oxygen atom, a sulfur atom, or -N(R 1 )-; R 1 represents a hydrogen atom, an alkyl group, or an aryl group; Q represents an atomic group of forming a hetero ring; and 1 indicates 0 or 1.
Abstract:
An endless retainer for a guiding device comprising a multiplicity of rolling bodies disposed at predetermined intervals and adapted to roll on an endless track formed in the guiding device and flexible resin connecting bodies having an interposing portion interposed between the respective rolling bodies and a connecting portion for connecting the interposing portions for holding the rolling bodies in an aligned and rollable state, wherein the resin connecting body is formed by injection molding using a resin having a dimensional changing before and after an oil or water absorption process greater than the molding shrinkage with the rolling body serving as a core, and wherein there are provided gaps between the rolling bodies and the resin connecting body that are formed through the oil or water absorption process, whereby since there is no risk of the rolling bodies coming off, the retainer is easy to handle. In addition, with this configuration, it is possible not only to automatically install the retainer in the guiding device but also to securely provide the extremely smooth rotation to the rolling bodies.
Abstract:
A slide guide such as a linear guide for endless slide, a curve guide, or a turning bearing, particularly of the type in which a roller chain with ends for supporting linear motion or rotary motion is inserted into an endless track. The slide guide comprises a track rail having a rolling path of rollers in a longitudinal direction, a load rolling path opposite to the rolling path, a non-load rolling path for circulating the rollers from one of the ends to the other of the load rolling path, moving bodies moving along the track rail, and a large number of rollers bearing a load, rolling between the moving bodies and the track rail, and circulating in an endless track including the load rolling path and the non-load rolling path. The rollers are rollably arranged in line at predetermined intervals on one or more flexible connecting belts and assembled together with the connecting belts into the endless track of the track of the slide member. The connecting belt circulates with the balls inside the endless track of the slide member while both ends of the connecting belt oppose each other.
Abstract:
An inorganic fine particle dispersion comprising inorganic fine particles having a particle size of from 1 to 15 nm in a concentration of from 1 to 70% by mass, a chlorine element in a concentration of at most 100 ppm, and at least one of an organic acid and an inorganic acid, wherein the total concentration of the organic acid and the inorganic acid is less than 0.15 times the solid concentration of the inorganic fine particles, is capable of keeping its high transparency even when mixed with a thermoplastic resin to give an organic-inorganic hybrid composition.
Abstract:
An organic-inorganic hybrid composition comprising a thermoplastic resin and inorganic fine particles, wherein the thermoplastic resin is a resin comprising a repeat unit in which a structure unit represented by the following formula (1) is contained in the main chain of the repeat unit: wherein R represents an alkyl group, an aryl group, an alkoxy group, an aryloxy group or hydroxyl group; and A 0 represents oxygen atom, sulfur atom or selenium atom.
Abstract:
An organic-inorganic hybrid composition comprising inorganic fine particles and a thermoplastic resin having a functional group capable of forming a chemical bond with the inorganic fine particles at a side chain thereof, the composition having a refractive index of 1.60 or more at a wavelength of 589 nm and a light transmittance of 70% or more at a wavelength of 589 nm in terms of the composition having a thickness of 1 mm. The composition has high refraction properties and excellent transparency.
Abstract:
An organic-inorganic hybrid composition comprising inorganic fine particles and a thermoplastic resin, wherein the thermoplastic resin has a structure in which a functional group capable of forming a chemical bond with the inorganic fine particles bonds to a main chain of the resin via a linking chain having a chain length of 4 or more atoms.
Abstract:
An organic-inorganic hybrid composition comprising a compound represented by the following formula (1) and an inorganic fine particle: wherein R 1 and R 2 represent a substituent; L represents an oxy group or a methylene group; a represents 0 or 1; and m1 and m2 represent 0 to 5.
Abstract:
An organic-inorganic hybrid composition comprising a block copolymer constituted of a hydrophobic segment and a hydrophilic segment and an inorganic fine particle having a number average particle size of from 1 nm to 15 nm, the organic-inorganic hybrid composition having a refractive index of 1.60 or more at a wavelength of 589 nm.
Abstract:
An organic-inorganic hybrid composition comprising inorganic fine particles having a refractive index of from 1.90 to 3.00, and a thermoplastic resin having a functional group capable of forming a chemical bond with the inorganic fine particles at one or more polymer chain terminals and having a number average molecular weight of from 1,000 to 500,000. The composition has high refraction properties and excellent transparency.