Shin-Etsu Chemical Co., Ltd.

Denso Corporation

Novartis Ag

Mitsubishi Gas Chemical Company, Inc.

Shin-Etsu Polymer Co., Ltd.

Menicon Co., Ltd.

Mamoru Hagiwara

Masahiko Minemura

Frank Chang

Shoji Ichinohe

Kazuhiko Nakada

Tsuyoshi Watanabe

Manabu Maeda

Takahiro Adachi

Katsunori Iwase

Yasuhiko Suzuki

Junya Ishida

Tsuneo Kimura

Yoshinori Inokuchi

Toshiyuki Ozai

Nobuaki Matsumoto

Naoki Omura

Taichi Kitagawa

Chihiro Hayakawa

Yoshinori Yoneda

Kohei Otake

Kohei Masuda

Hiroaki Tetsuka

Kazuyuki Takewaki

Mitsuaki Negishi

Yuzo Morioka

Ryosuke Yoshii

Mika Kawakita

Hiroyuki Kume

Provided are an excellently convenient ultraviolet-curable organopolysiloxane causing no surface curing inhibition even when cured in the atmosphere; a composition containing such organopolysiloxane; and a cured product of such composition. The organopolysiloxane is represented by the following formula (1):

Organopolysiloxane, ultraviolet-curable silicone composition and cured product

A silicone particle containing: a dialkylsiloxane unit represented by the following general formula (1), RSiO(1), where, in the formula (1), Rs each independently represent a monovalent hydrocarbon group having 1 to 6 carbon atoms; and a poly(alkyleneoxyalkyl)methylsiloxane unit represented by the following general formula (2), where, in the formula (2), Rs each independently represent a hydrogen atom or a monovalent hydrocarbon group having 1 to 6 carbon atoms, Rs each independently represent a divalent aliphatic group having 1 to 6 carbon atoms, and 'n' is a number that satisfies 1≤n≤20, where the silicone particle has an oxyalkylene group in a surface thereof. A silicone particle may be readily dispersed in an aqueous material without the use of a dispersant or a surfactant, the silicone particle having a hydrophilic group.

Silicone particle and method for producing the same

A photocurable composition including the following components (A) to (D), (A) a monomer having one (meth)acryloyl structure, (B) a crosslinking agent having two or more (meth)acryloyl structures, (C) an inorganic ultraviolet-blocking agent having a 50% volume cumulative particle size of 1 to 50 nm, and (D) a photopolymerization initiator in an amount of 0.05 to 1 part by weight, relative to total 100 parts by weight of components (A) and (B), wherein a part or all of component (A) is a hydrophilic monomer, and a content of the hydrophilic monomer is 70% by weight or more, relative to the total weight of components (A) and (B).

Photocurable composition, a hydrogel and a molded product thereof

The present invention is a radically curable organosiloxane graft polyvinyl alcohol polymer having structural units represented by both of the following general formula (1) and general formula (2). The present invention provides a radically curable organosiloxane graft polyvinyl alcohol polymer having general properties such as film-forming property and transparency, excellent handleability as a liquid material since solubility in an organic solvent is high, and both of solvent resistance and moldability of the obtained film. 

Radically curable organosiloxane graft polyvinyl alcohol polymer and process for producing same

An organosiloxane graft polyvinyl alcohol polymer contains a structural unit shown by the following general formula (1), wherein Mand Mrepresent a hydrogen atom, an acetyl group, or a siloxane group shown by the following general formula (2), provided that at least one of Mand Mis a siloxane group shown by the general formula (2); and A represents a single bond or a linking group, wherein Rrepresents a monovalent organic group having 1 to 6 carbon atoms; R, R, and Reach represent a monovalent organic group having 1 to 6 carbon atoms or a siloxy group shown by &#x2014;OSiRRR, where R, R, and Reach represent a monovalent organic group having 1 to 6 carbon atoms; 'n' represents an integer of 1 to 10; and 'a' represents an integer of 0 to 2.

Organosiloxane graft polyvinyl alcohol polymer and method of producing the same

The invention provides a TRIS-containing vinylic monomer which comprises one sole (meth)acryloyloxy group and a tris(trimethylsiloxy)silyl group covalently linked to the ethylenically-unsaturated group through a polyoxyethylene linker. The present invention is also related to a polymer, an actinically-crosslinkable silicone-containing prepolymer, a silicone hydrogel polymeric material, or a silicone hydrogel contact lens, which comprises monomeric units derived from a TRIS-containing vinylic monomer of the invention. In addition, the invention provides a method for making a TRIS-containing vinylic monomer of the invention.

Tris(trimethyl siloxy)silane vinylic monomers and uses thereof

Tris(trimethyl siloxyl)silane vinylic monomers and uses thereof

Surfaces of silicone particles are hydrophilized by plasma treatment. The hydrophilized silicone particles are readily dispersible in aqueous materials without a need for dispersants, typically surfactants. In aqueous cosmetic applications externally applied to the skin such as skin care cosmetics, make-up cosmetics, antiperspirant cosmetics, and UV care cosmetics, for example, products free of skin irritation concern can be formulated because formulation is possible without a need for surfactants.

Hydrophilized silicone particles and making method

According to the present invention, a contact lens material being excellent in oxygen permeability and transparency, being capable of undergoing injection molding, having no water content and having flexibility is provided. The present invention also relates to a contact lens gel material having excellent oxygen permeability and transparency. Particularly, the present invention relates to a contact lens material comprising a polycarbonate resin derived from a bisphenol compound (A), a polysiloxane-substituted bisphenol compound (B) and a compound forming a carbonic acid ester.

Contact lens material

According to the present invention, a contact lens material being excellent in oxygen permeability and transparency, being capable of undergoing injection molding, having no water content and having flexibility, as well as a contact lens gel material having excellent oxygen permeability and transparency can be provided. The present invention relates to a contact lens material comprising a polycarbonate resin derived from at least two compounds among compounds represented by a general formula (A), a general formula (B) and a general formula (C), a highly polar molecular weight control modifier (chain terminator) and a compound forming a carbonic acid ester, wherein the compound of the general formula (A) is essentially comprised, and to a production method thereof.

Method for producing polycarbonate material having excellent solubility and affinity, and contact lens material comprising the same

The present invention provides an air-conditioning system that supplies a gas to a space to be air-conditioned and/or discharges a gas from the space to be air-conditioned through a permeable membrane in order to provide an air-conditioning system that can sufficiently block suspended matter in the air such as SPM, and can sufficiently introduce outside air in which the permeable membrane is an asymmetric membrane formed of a polymeric material prepared by polymerizing a monomer composition containing a predetermined monomer.

Air-conditioning system

The present invention relates to a one-terminal reactive organopolysiloxane further having a hydrophilic polyalkyleneoxide group at the omega-terminal and a method for its production. Thus, the present invention provides a one-terminal reactive organopolysiloxane which is characterized by having a polyalkyleneoxide at the omega-terminal, and composed of blocks arranged in the following order:A-B&#x2014;C&#x2014;Y wherein A is a monovalent polyalkyleneoxide group having an alkoxy group at a terminal, B is a substituted or unsubstituted divalent alkylene group, C is a divalent polysiloxane group, Y is a monovalent group selected from the group consisting of an alkyl group having a reactive group, a hydrogen atom, a styryl group and a trialkoxysiloxy group, and provides a method for the preparation thereof.

One-terminal reactive organopolysiloxane having a polyalkyleneoxide group at the omega-terminal and a method for the preparation thereof

An asymmetric membrane contains a porous layer and a dense layer adjacent thereto. The porous layer and the dense layer are formed of a polymeric material. The porous layer and/or dense layer contains a filler. The amount of the filler is 11 parts by mass or more per 100 parts by mass of the polymeric material contained in the asymmetric membrane.

Asymmetric membrane and air-conditioning system using the same

Provided is a siloxane compound having one end modified with at least one (meth)acrylic group via a spacer, the spacer being a straight chain having at least three ether bonds or a branched structure having at least one ether bond. The (meth)acrylic-modified siloxane compound is added to a heat or photo-curable composition, which cures into a product exhibiting water repellent, antifouling, lubricating and other properties inherent to siloxane.

Growing community of inventors

Annaka, Japan

Mamoru Hagiwara