摘要:
An aqueous solution contains a piperazinyl-containing silanol compound having formula (1) wherein R1 is a monovalent hydrocarbon group and n is 0, 1 or 2 and a dehydrated condensate thereof, with a volatile alcohol content being less than 10 wt %.
摘要:
Disclosed are an ophthalmic lens, a cell or organ culture substrate, a container for a biological material and a transparent gel which have excellent wetting and sticking properties and do not require any surface treatment. An ophthalmic lens, cell or organ culture substrate, container for a biological material or transparent gel produced by polymerizing a cyclic siloxane compound represented by the formula (A): (A) wherein Ra are Rb independently represent a hydrogen or a monovalent hydrocarbon group which may be substituted by a fluorine; Rc represents an alkyl group having 1 to 6 carbon atoms or a phenyl group; X represents an organic group having an aliphatic unsaturated bond therein; and n is an integer of 1 to 10.
摘要:
An organosilicon compound having an amino group is provided. This compound is represented by the following general formula (1): wherein R1 and R2 respectively represent an unsubstituted or substituted aliphatic monovalent hydrocarbon group containing 1 to 10 carbon atoms with the proviso that the R1 and R2 may together form a ring with the nitrogen atom to which they are bonded, and that R1 and R2 may contain a heteroatom; R3 and R4 independently represent an unsubstituted or substituted monovalent hydrocarbon group containing 1 to 10 carbon atoms; and n represents an integer of 0 to 2. Use of this compound enables production of a polymer product having excellent mechanical properties, high heat resistance, and high transparency. The solution of this compound is stable, and can be stored for a long time, and when used for a polymer modifying agent, it facilitates introduction of amino group and hydroxy group.
摘要:
A novel organoxysilane compound bearing a protected piperazino group is provided. It can impart rigidity, high mechanical strength, and transparency in the UV region when used in paints, adhesives and the like.
摘要:
A 1-(alkoxysilyl)ethyl-1,1,3,3-tetramethyldisiloxane is prepared by adding a vinyl-containing alkoxysilane in portions to 1,1,3,3-tetramethyldisiloxane in the presence of a rhodium compound, and effecting reaction.
摘要:
A novel organoxysilane compound bearing a protected piperazino group is provided. It can impart rigidity, high mechanical strength, and transparency in the UV region when used in paints, adhesives and the like.
摘要:
A method of easily manufacturing a nano-gap electrode by using a focused ion beam lithography includes a layer depositing step of depositing an electrode layer and a metal mask layer in this order on an insulating substrate, a mask pattern forming step of etching the metal mask layer by using the focused ion beam and thereby forming a mask pattern, a dry etching step of transferring a pattern to the electrode layer by dry etching, and a wet etching step of removing the metal mask layer by using a solution that selectively dissolves the metal mask layer compared to the electrode layer.
摘要:
A novel monofunctional monomer having a cage oligosiloxane structure is represented by formula (1) wherein X is a polymerizable oxygen-containing C1-C40 group, R1 is a C1-C20 saturated hydrocarbon group, C6-C20 aromatic hydrocarbon group, C1-C20 organoxy group or halogen atom, and R is a non-polymerizable monovalent C1-C40 hydrocarbon group which is optionally halogenated. The monomer has improved compatibility with various solvents and polymerizable monomers. A method for preparing the same is also provided.
摘要:
By reacting a branched siloxane compound of formula (2) containing compounds of formula (1) as an impurity with a disiloxane compound of formula (3) in the presence of an acid compound, there is prepared a branched siloxane of formula (2) containing a reduced level of compounds of formula (1). R1nSi(OSiR23)3-n(OR3) (1) R1nSi(OSiR23)4-n (2) R23SiOSiR23 (3) R1 is a monovalent hydrocarbon group, R2 and R3 are H or monovalent hydrocarbon groups, and n is 0 or 1.
摘要:
Tetrakis(trimethylsilyl)silane is prepared by reacting tetrachlorosilane with chlorotrimethylsilane in the presence of lithium metal, adding a compound with active proton(s) to the reaction mixture for treating the residual lithium metal therewith while maintaining the mixture neutral or acidic, and separating tetrakis(trimethylsilyl)silane from the organic layer. The residual lithium metal is treated in a safe and simple manner. Reaction of the tetrakis(trimethylsilyl)silane with an alkyl lithium or alkali metal alkoxide, followed by acid hydrolysis, affords tris(trimethylsilyl)silane. The desired compounds are prepared in high yields and on an industrial scale.