Hitachi, Ltd.

Hitachi-high-technologies Corporation

Jun Nunoshige

Takahito Muraki

Yuri Kajihara

Hiroshi Nakano

Shinya Ito

Takeshi Kondo

Hiroyuki Kagawa

Yasuhiko Tada

In a conventional self-healing material, although the resin properties after self-healing are restored to the same level as the initial refractoriness and strength of the resin, no further extension of life can be expected. A resin cured product according to the present invention includes: a first vinyl monomer having an ester bond; a second vinyl monomer having a hydroxyl group; a transesterification reaction catalyst; and a boron compound.

Resin cured product, electrical device, motor, transformer, cable sheath, mobile, structure, and method for healing resin cured product

An adsorbent which enables solid phase extraction of water-soluble molecules with high efficiency and excellent selectivity and an analysis system using the adsorbent, the adsorbent containing a structure represented by the formula I wherein R is a carrier component, the moiety other than R is a side-chain functional group, R and the benzene ring in the side-chain functional group are bonded directly or bonded through one or more atoms, R' is selected from the group consisting of hydroxy group, alkoxy group, amino group, alkylamino group, thiol group and alkyl sulfide group, R&#x2033; is independently selected from the group consisting of hydroxy group, alkoxy group, alkyl group, amino group, alkylamino group, dialkylamino group, trialkylamino group, thiol group, alkyl sulfide group and hydrogen atom, x is an integer of zero or more and three or less, and n is the number of the side-chain functional groups contained in the carrier component.

Adsorbent and analysis method using same

This invention is intended to synthesize a multi-branched polymer, which has an uniform molecular chain lengths and is free from branch defects, without the need for purification. This invention is also intended to synthesize a polyfunctional radical polymerization initiator represented by Formula 1: wherein n is an integer of 1 or larger; Y is a polyfunctional unsaturated compound; Ris a hydrocarbon group; Ris a structure in which one molecule of a radically polymerizable unsaturated hydrocarbon compound is bound to Rand the oxygen atom; Xof B&#x2014;X(boron-X) bond is an alkoxy or phenyl group; and Xof B&#x2014;X(boron-X) bond is an alkoxy or phenyl group.

Radical polymerization initiator, multi-branched polymer, varnish, adhesive agent, coating material, sealing material, semiconductor, and electronic device

The present invention provides a method for forming a polymer by using a mixture containing a polymerization initiator which is an adduct of a boron compound and a first unsaturated hydrocarbon compound, and a second unsaturated hydrocarbon compound, generating a radical by oxidization of the polymerization initiator and adding the radical to the second unsaturated hydrocarbon compound, thereby forming the polymer. According to the present invention, excellent controllability of alkylboranes for radical polymerization can be maintained and the structure of a polymerization initiation terminal can be freely selected and controlled. Thus, a terminal-modified polymer having functionality imparted to the terminal group can be prepared. In addition, a polymerization initiator having a plurality of polymerization starting points can be prepared, and polymers with special structures including multibranched polymers, grafted-type (comb-type) polymers and brush-shaped polymers can be prepared.

Growing community of inventors

Tokyo, Japan

Jun Nunoshige