Shin-etsu Chemical Co., Ltd.

Ryuto Hayashi

Kenichi Fukuda

Hideyoshi Yanagisawa

Kazunori Kondo

Yuji Yamane

Hitoshi Maruyama

An alkali-resistant water repellent member according to the present invention has: a silica layer on at least one surface of a base material, said silica layer having a film thickness of from 1 nm to 5 μm, while containing 50% by mass or more of silica nanoparticles and 1% by mass or more of an organosilicon compound that has a plurality of silanol groups in each molecule; and a water repellent oil repellent layer on the outer surface of the silica layer, said water repellent oil repellent layer having a film thickness of from 0.5 nm to 30 nm, while being mainly composed of a cured product of a hydrolyzable fluorine-containing organosilicon compound. This alkali-resistant water repellent member is able to easily provide various base materials with a water repellent oil repellent coating film in a stable manner, said coating film having excellent alkali resistance and wet wear resistance.

Alkali-resistant water repellent member, method for producing said water repellent member, and method for improving alkali resistance and wear resistance of water repellent member

A perfluoropolyether-based rubber composition which gives cured objects excellent in terms of heat resistance, low-temperature resistance, organic-solvent resistance, and acid resistance, the rubber composition being characterized by comprising (a) a linear perfluoropolyether compound having a number-average molecular weight of 1,000-100,000 and including at least two azido groups in the molecule and a divalent perfluoroalkyl ether structure in the main chain and (b) a linear perfluoropolyether compound having at least three ethynyl groups in the molecule.

Perfluoropolyether-based rubber composition, cured object obtained therefrom, and product including same

An azide group-containing fluoropolymer of formula (1) having a perfluoropolyether group of specific molecular structure as the backbone and terminated with an azide group via methylene group is provided.N&#x2014;CH&#x2014;Rf&#x2014;CH&#x2014;N&#x2003;&#x2003;(1)

Azide group-containing fluoropolymers and method for preparing the same

A silicone-modified polybenzoxazole resin comprising repeating units of formulae (1a) and (1b) is prepared by addition polymerization. Rto Rare a C-Cmonovalent hydrocarbon group, m and n are integers of 0-300, Ris C-Calkylene or phenylene, a and b are positive numbers of less than 1, a+b=1, and Xis a divalent linker of formula (2). The resin is flexible, soluble in organic solvents, and easy to use. 

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Annaka, Japan

Ryuto Hayashi