Nissan Chemical Industries Limited

Nissan Chemical Corporation

Tohoku University

Ibaraki University

Keio University

Takehiro Nagasawa

Taku Kato

Keisuke Shuto

Kentaro Ohmori

Sayoko Tadokoro

Sho Yoshida

Kenji Takase

Kei Yasui

Tsubasa Kashino

Akira Watanabe

Takaaki Ishigure

Toshio Kubota

Yuki Saito

Tokuji Miyashita

Akira Hirooka

Kazuki Yasuhara

Chinami Marushima

An optical waveguide-forming material has a low propagation loss even in a long wavelength region and has a high refractive index at a wavelength of 1,550 nm. An optical waveguide-forming composition includes (a) 100 parts by mass of a reactive silsesquioxane compound that is a polycondensation product of an alkoxysilane compound A of the following Formula [1]:Ar&#x2014;Si(OR)&#x2003;&#x2003;[1]and an alkoxysilane compound B of the following Formula [2]:Ar&#x2014;Si(OR)&#x2003;&#x2003;[2]and (b) 10 to 500 parts by mass of a fluorene compound of the following Formula [3]:  An optical waveguide can be formed by using the composition.

Optical waveguide-forming composition which contains reactive silsesquioxane compound

A polymerizable composition includes 100 parts by mass of a reactive polysiloxane being a polycondensation product of an alkoxy silicon compound including at least an alkoxy silicon compound of formula [1], and 10 to 500 parts by mass of a polymerizable compound having at least one polymerizable double bond. (X is a phenyl group having at least one substituent having a polymerizable double bond, a naphthyl group having at least one substituent having a polymerizable double bond, a biphenyl group having at least one substituent having a polymerizable double bond, or a phenanthryl group having at least one substituent having a polymerizable double bond, Aris a condensed ring hydrocarbon group having two or more benzene ring structures, or a hydrocarbon ring assembly group in which two or more aromatic rings are directly bonded through a single bond, and Ris methyl group, ethyl group, or isopropyl group).

Reactive polysiloxane and polymerizable composition comprising same

A polymerizable silane compound that yields a cured product exhibiting a high refractive index and a low Abbe number, used in a polymerizable composition for preparing a molded article having higher transparency. A polysiloxane being a polycondensation product of the compound of formula [1]: (wherein X is a phenyl group having at least one substituent having a polymerizable double bond, a naphthyl group having at least one substituent having a polymerizable double bond, a biphenyl group having at least one substituent having a polymerizable double bond, or a phenanthryl group having at least one group having a polymerizable double bond, Aris a condensed polycyclic hydrocarbon group (optionally substituted with a Calkyl group), or a hydrocarbon ring assembly group wherein two or more aromatic rings are directly bonded through a single bond (optionally substituted with a Calkyl group), and Ris a methyl, ethyl, or isopropyl group).

Polymerizable silane compound

A polymerizable composition which can be cured into a cured product exhibiting a low Abbe's number and is suitable for producing a molded article having a further high transparency. A polymerizable composition including 100 parts by mass of a reactive silsesquioxane compound containing a phenanthrene ring (a), and 10 to 500 parts by mass of a polymerizable compound having at least one polymerizable double bond (b), a cured product of the polymerizable composition, and a method for producing a molded article by using of the polymerizable composition.

Polymerizable composition containing reactive silsesquioxane compound containing phenanthrene ring

There is provided a polymerizable composition suitable to produce a molded product in which high refractive index is maintained, and dimensional change and a transmittance change further caused by a high-temperature heat history can be suppressed. A polymerizable composition comprising (a) 100 parts by mass of a specific reactive silsesquioxane compound and (b) 10 to 2,000 parts by mass of a specific fluorene compound, and a cured product obtained by curing the polymerizable composition, and a resin lens manufactured from the polymerizable composition.

Polymerizable composition comprising silsesquioxane compound having acrylic group

A polymerizable composition suitable for use in producing molded articles that can maintain a high refractive index, and can be prevented from cracking, peeling from a support, and dimensional changes due to a high-temperature thermal history. A polymerizable composition including (a) 100 parts by mass of a specific reactive silsesquioxane compound, (b) 10 to 500 parts by mass of a specific fluorene compound, and (c) 0.1 to 50 parts by mass of a polymer having a weight average molecular weight of 5,000 to 100,000; a cured product obtained by polymerizing the polymerizable composition; and a high-refractive-index resin lens material including the polymerizable composition.

Polymerizable resin composition comprising reactive silsesquioxane compound

A production method for an optical waveguide including: a first step of inserting a needle-like portion at a tip end of an ejection unit into uncured cladding; a second step of moving the needle-like portion in the uncured cladding while ejecting an uncured material from the needle-like portion to form an uncured core surrounded and covered with the uncured cladding; a third step of removing the needle-like portion from the uncured cladding; and a fourth step of curing the uncured cladding and core, wherein the uncured cladding is composed of a composition including a reactive silicone compound composed of a polycondensate of a diarylsilicic acid compound of Formula [1] and an alkoxy silicon compound of Formula [2]Ar&#x2014;Si(OR)R&#x2003;&#x2003;[2]and a di(meth)acrylate compound of Formula [3] and the uncured core is composed of a composition including a reactive silicone compound and an aromatic vinyl compound of Formula [4] 

Production method for GI optical waveguide

A polymerizable composition suitable for producing a molded article that can maintain a high refractive index and a low Abbe's number and can be restrained from dimensional changes due to a high-temperature thermal history has (a) 100 parts by mass of a specific reactive silsesquioxane compound, (b) 10 to 500 parts by mass of a specific fluorene compound and (c) 1 to 100 parts by mass of a specific aromatic vinyl compound. A cured product can be obtained by curing the polymerizable composition.

Polymerizable composition comprising reactive silsesquioxane compound and aromatic vinyl compound

A polymerizable composition that is suitable to produce a molded product that can suppress cracking and dimensional change caused by a high-temperature heat history with a high refractive index of a cured product maintained. A polymerizable composition including (a) 100 parts by mass of the specific reactive silsesquioxane compound, (b) 10 to 500 parts by mass of the specific fluorene compound, a cured product obtained by the polymerizable composition and a material for a high-refractive index resin lens including the polymerizable composition.

Polymerizable composition containing reactive silsesquioxane compound

An optical waveguide-forming composition: 100 parts by mass of a reactive silicone compound (a) composed of a polycondensate of a diarylsilicic acid compound A of Formula [1] Arand Arare a phenyl, naphthyl or a biphenyl group optionally substituted, and an alkoxy silicon compound B of Formula [2]Ar&#x2014;Si(OR)R&#x2003;&#x2003;[2].Aris a phenyl, naphthyl or biphenyl group having at least one group having a polymerizable double bond, Ris methyl or ethyl group, Ris methyl, ethyl, or vinylphenyl group, and a is 2 or 3, and 1 part by mass to 200 parts by mass of a di(meth)acrylate compound (b) of Formula [3]. Rand Rare a hydrogen atom or methyl group, Ris a hydrogen atom, methyl group, or ethyl group, Land Lare an alkylene group, and m and n are 0 or a positive integer, wherein m+n is 0 to 20.

Optical waveguide-forming composition

Disclosed is a fluorine-containing polymer obtained by polymerizing a 1,6-diene-type ether compound represented by formula [1] and, for example, a (meth)acrylic acid compound represented by formula [2]. The fluorine-containing polymer shows high transparency, has a high glass transition point, and is soluble in a solvent and therefore has moldability. In the case where a (meth)acrylic unit has a reactive substituent, by utilizing the crosslinking reaction thereof, a thin film having high solvent resistance can be produced. In formulae [1] and [2], Rand Reach independently represent a hydrogen atom or an alkyl group having 1 to 12 carbon atoms, which may be substituted, Rrepresents a hydrogen atom, a fluorine atom, or a methyl group, and Rrepresents a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, which may be substituted, or an aromatic group having 5 to 10 ring members, which may be substituted.

Transparent fluorine-containing polymer

There is provided a polygermane compound forming a film having a high refractive index and thermal stability, and containing a sulfur atom-containing organic group as a group bonded to a germanium atom. A polygermane compound comprising a sulfur atom-containing organic group as a group bonded to a germanium atom, in which the sulfur atom-containing organic group is a group of Formula [1]:-L-Z&#x2003;&#x2003;[1]where L is a single bond, a Calkylene group, or a Carylene group optionally substituted with a Calkyl group; and Z is a Csulfide group, a Ccyclic sulfide group optionally substituted with a Calkyl group, a Calkyl group containing a sulfide bond, or a Caralkyl group containing a sulfide bond, with a proviso that when L is a single bond, Z is not a Csulfide group.

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Funabashi, Japan

Takehiro Nagasawa