Adeka Corporation

Jeol Ltd.

Sumitomo Electric Industries, Limited

The Kansai Electric Power Co., Inc.

Takashi Sueyoshi

Seiichi Saito

Yoshitaka Sugawara

Shinichi Kitamura

Ken-ichiro Hiwatari

Yoshikazu Shoji

Tadashi Janado

Tomoyuki Hattori

Kazuyuki Sohma

Koichi Sakamaki

Provided is an optical fiber which is provided with heat resistance and productivity and in which a transmission loss is suppressed even in a high-temperature environment. It has, on an outer periphery of a glass fiber composed of a core part and a cladding part, a coating layer made by crosslinking an energy-curable resin composition containing a silicon compound, in which the silicon compound contained in the energy-curable resin composition of the coating layer as an outermost layer has a specified structure having a cyclic silicone site having an epoxy group and a linear silicone site, with the content of the cyclic silicone site in the compound being from 10 to 30% by mass.

Optical fiber

A silicon-containing compound of formula (1), and a curing composition containing a silicon-containing compound of formula (1) wherein Z is hydrogen, a silicon-containing compound of formula (1) wherein Z is C2-C4 alkenyl or alkynyl and a hydrosilylation catalyst. The composition has excellent handling and curing properties and provides a cured product with excellent heat resistance and flexibility. In formula (1), R-R=C1-C12 saturated aliphatic hydrocarbon group or C6-C12 aromatic hydrocarbon group. Rand Rdo not simultaneously represent C1-C12 saturated aliphatic hydrocarbon group; Y=C2-C4 alkylene; Z=hydrogen or C2-C4 alkenyl or alkynyl; K is 2-7; T is 1-7; P is 0-3; and M and N are numbers selected such that N:M=1:1 to 1:100, that all M's and N's total at least 15, and that the mass average molecular weight of the compound of formula (1) is 3,000 to 1,000,000.

Silicon-containing compound, curable composition and cured product

A curable composition which comprises at least one of the following (A), (B), and (C) and further contains (D) (provided that when (C) is not contained, both (A) and (B) are in the composition. (A): A silicon-containing polymer in which the content of components having a weight-average molecular weight of 1,000 or lower is 20 wt. % or lower and which has a reactive group A' and one or more Si&#x2014;O&#x2014;Si bonds. (B): A silicon-containing polymer in which the content of components having a weight-average molecular weight of 1,000 or lower is 20 wt. % or lower and which has an Si&#x2014;H group and one or more Si&#x2014;O&#x2014;Si bonds. (C): A silicon-containing polymer in which the content of components having a weight-average molecular weight of 1,000 or lower is 20 wt. % or lower and which has a reactive group A&#x2032;, an Si&#x2014;H group, and one or more Si&#x2014;O&#x2014;Si bonds. (D): A catalyst for curing reaction which is a platinum catalyst. The reactive group A&#x2032; is any of Si&#x2014;R, Si&#x2014;O&#x2014;R, and Si&#x2014;R&#x2014;OCOC(R)&#x2550;CH, provided that Rand Reach is alkenyl, Ris alkylene and/or arylene, and Ris hydrogen or methyl.

Silicon-containing curing composition and heat cured product thereof

There is disclosed a scanning probe microscope capable of producing a topographic image at a high resolution with a cantilever of a large spring constant and, at the same time, a surface potential image at a high resolution. This microscope can take the form of an atomic force microscope that detects the surface potential of a sample, using a force gradient acting between the probe tip and the sample. The gradient is represented by the output from a frequency-to-voltage converter.

Scanning probe microscope

There is disclosed a scanning probe microscope capable of producing a topographic image and a magnetic image of a surface of a sample in one measurement. The microscope has a probe tip made of a magnetic material. A physical force, such as an atomic force, is exerted between the probe tip and the sample. When this physical force does not act on the probe tip, it vibrates at a first vibrational frequency. Displacements of the probe tip are detected by a photodetector. A topographic information-extracting portion including a voltage-to-current converter, a phase shifter, an FM demodulator, a low-pass filter, and an error amplifier extracts a signal representative of topographic information from the output from the photodetector. A magnetic distribution-extracting portion, including an oscillator and a lock-in amplifier, extracts information about the magnetism of the sample from the output from the photodetector.

Growing community of inventors

Tokyo, Japan

Takashi Sueyoshi