27 results about "Silylation" patented technology

A substrate processing method according to the present invention incudes: a preparation step of preparing a substrate in which at least a first surface containing silicon oxide and a second surface containing silicon or a silicon compound other than silicon oxide are exposed; a surface modification step of forming an etching selectivity imparting film on at least a part of the first surface and at least a part of the second surface by a silylation treatment of bringing a silylating agent into contact with the first surface and the second surface; and an etching step of selectively carrying out an etching treatment on the second surface with respect to the first surface using an etching agent after the surface modification step.

The application relates to a chiral NSiN ligand based on a phenyloxazoline skeleton, a preparation method and application thereof, wherein the chiral NSiN ligand is prepared from a chiral phenyloxazoline bromide with R or S configuration through lithiation and silylation. The chiral NSiN ligand can be used in transition metal catalyzed asymmetric synthesis, and is used in catalyzing an allylic sulfonylation reaction with a cobalt catalyst, and shows high reaction activity and high stereoselectivity.

The present invention provides a curable resin composition containing a vinyl polymer having a reactive silyl group, which exhibits excellent weather resistance and good extensibility. [Solution] A curable resin composition comprising a vinyl polymer (A), wherein the vinyl polymer (A) has a main chain having repeating units of polymerizable vinyl monomers and reactive silyl groups bonded to the vinyl polymer main chain via a urethane structure, and the vinyl polymer (A) is a polymer obtained by silylation of the plurality of hydroxyl groups of a vinyl polymer (a) having a plurality of hydroxyl groups and a weight-average molecular weight / hydroxyl value of more than 4,000.

To provide a curable composition from which a cured product having good tensile strength and excellent tear strength is obtained, a cured product of the curable composition, and a method for producing the cured composition.SOLUTION: A curable composition comprising a polymer A and a polymer B, wherein the polymer A has two or more terminal groups in one molecule, and the terminal groups do not have a divalent organic group represented by - C (= O) NH - and have at least one group selected from the group consisting of a reactive silicon group, an unsaturated group, and a hydroxyl group, the polymer A is an oxyalkylene polymer having a silylation ratio of 85 to 100 mol%, and the polymer B is an oxyalkylene polymer having two or more terminal groups per molecule, the terminal groups each having at least one group selected from the group consisting of a reactive silicon group, an unsaturated group, and a hydroxy group, the average total number of reactive silicon groups, unsaturated groups, and hydroxy groups per terminal group being more than 1.0, and the silylation ratio of the polymer B being smaller than the silylation ratio of the polymer A.SELECTED DRAWING: None

To provide a curable composition which gives a cured product having good tensile strength and is excellent in curing rate, a cured product of the curable composition, and a method for producing the cured composition.SOLUTION: A curable composition comprising a polymer A and a polymer B, wherein the polymer A is an oxyalkylene polymer having two or more terminal groups in one molecule, the terminal groups not having a divalent organic group represented by - C (= O) NH - and having at least one group selected from the group consisting of a reactive silicon group, an unsaturated group, and a hydroxyl group, and having a silylation ratio of 85 to 100 mol%, the terminal group is an oxyalkylene polymer that does not have a divalent organic group represented by -C (= O) NH -, has at least one group selected from the group consisting of a reactive silicon group, an unsaturated group, and a hydroxyl group, and has a silylation ratio smaller than a silylation ratio of the polymer A.SELECTED DRAWING: None

The invention discloses a method for analyzing a polymeric lignin structural unit in watermelon peel, and belongs to the technical field of biological substance composition determination methods, the method comprises the following steps: S1, protective pretreatment: mixing a watermelon peel sample with a protective solution containing triphenylmethyl mercaptan; s2, thioacidolysis: adding a reaction solution containing boron trifluoride and ethanethiol, and heating for depolymerization; s3, in-situ neutralization and derivatization: adding a buffer solution, extracting and drying to obtain an organic phase, and then adding a silanization reagent for derivatization reaction; s4, qualitative and quantitative analysis; through the multi-level design of structure protection, efficient derivation and system integration, the established analysis method shows remarkable advantages in the aspects of inhibiting condensation reaction, improving operation safety, shortening analysis period and realizing quantification, effectively overcomes the technical bottlenecks of low recovery rate, high toxicity, long time consumption, incomplete detection and the like in the prior art, and has wide application prospects. And an excellent technical scheme is provided for composition analysis of the plant polymerized lignin.

There is a need for a novel curable organopolysiloxane composition, etc. A curable organopolysiloxane composition comprising: (A) 100 parts by mass of a chain organopolysiloxane having a viscosity of 1,000,000 mPa·s or more at 25°C or having plasticity at 25°C and having an alkenyl group having 2 to 12 carbon atoms; (B) 5 to 80 parts by mass of a chain organopolysiloxane not having an alkenyl group having a viscosity of 500,000 mPa·s or more at 25°C or having plasticity at 25°C; (C) 0.1 to 20 parts by mass of a chain organopolysiloxane not having an alkenyl group having a viscosity of less than 500,000 mPa·s at 25°C; (D) an organohydrogenated polysiloxane having two or more silicon-bonded hydrogen atoms (Si-H) in one molecule; and (E) a hydrogenation silylation reaction catalyst.

The present application relates to a crosslinkable composition comprising: - a polymer P comprising at least one polymer P1 comprising at least one functional group of the following formula (I): -SiR3-pXp (I) said polymer P1 comprising a main chain based on (meth)acrylate; - a polyurethane P' comprising at least one functional group of formula (II): -SiR''3-tX't (II) - carbon black having an oil absorption number (OAN) of at least 80 mL / 100g.

A process for preparing a vinyl-functional chlorosilane is performed by dehydrogenative silylation of a hydridochlorosilane and ethylene, both in the gas phase, in the presence of the heterogeneous rhenium catalyst. The process can be used to prepare vinyldimethylchlorosilane at ambient pressure.

The invention relates to a method for the preparation of isocyanates. Here it is provided that(i) a first organosilicon compound having at least one silicon atom Si1 and a unit of formula G-I bound theretois converted to a third organosilicon compound having a unit of formula G-IIby silylation of the NH group of the unit of formula G-I with a second organosilicon compound having one silicon atom Si2; and(ii) the third organosilicon compound is reacted to an isocyanate by thermolysis, whereby the unit of formula G-II is converted to an isocyanate group.

Method for carrying out a reaction I, wherein a raw material comprising methanol and / or dimethyl ether and toluene is contacted in a reactor with a catalyst obtained in an in-situ and in-line process to produce light olefins with a co-product of paroxylol, where reaction I is intended to produce light olefins from methanol and / or dimethyl ether and toluene with the co-product paroxylol, wherein a material stream I is brought into contact with the catalyst in the reaction system to obtain a material stream II, and C4 olefin or C 5+ Chain hydrocarbons are separated from material stream II, and the light olefins and paraxylene separated from material stream II and returned to the reaction system are used as products. the material stream I contains methanol and / or dimethyl ether and toluene, wherein the reaction system comprises: a first reaction zone containing a catalyst A; and a second reaction zone containing a catalyst B; and wherein catalyst A is an HZSM-5 molecular sieve catalyst modified by a phosphorus reagent and a silylation reagent, wherein the specific preparation steps are as follows: (A1) A mixture of the phosphorus reagent, the silylation reagent and toluene is fed into the first reaction zone with the HZSM-5 molecular sieve at a temperature in the range of 130°C to 500°C; (A2) The temperature is increased to over 500°C and the mixture is calcined in an air atmosphere for a period of 1 hour to 6 hours to obtain catalyst A, wherein catalyst B is an HZSM-5 molecular sieve catalyst modified by a silylation reagent, the specific preparation steps being as follows: (B1) A mixture of the silylation reagent and methanol is fed into the second reaction zone with the HZSM-5 molecular sieve at a temperature in the range of 120°C to 250°C; (B2) The temperature is increased to over 500°C and the mixture is calcined in an air atmosphere for a period of time ranging from 1 hour to 6 hours to obtain catalyst B.

A method for preparing silylated cellulose is disclosed. The method includes preparing a reaction product in the form of a paste and removing unreacted starting materials and / or by-products from the paste to form a powdered silylated cellulose.

The present invention relates to the field of organic chemical synthesis, and specifically relates to a preparation method for chiral 6-aminonicotine. Provided in the present invention is a method for synthesizing single chiral 6-aminonicotine, using natural nicotine as a starting material, and sequentially undergoing a silylation reaction, a nitro substitution reaction and a reduction reaction to finally obtain the target product chiral 6-aminonicotine. By means of said synthetic route, an enantiopure S-6-aminonicotine can be obtained, the product purity can reach 99.7% or above, and the optical purity is 99.5%. The synthesis method of the present application has a simple process and high yield, and is suitable for industrial scale-up production.

This invention provides a pattern formation method that uses a (meth)acrylic polymer, which can be used for ArF patterning, as the main framework, and obtains a narrow-pitch fine pattern by dry development without silylation. [Solution] A pattern formation method comprising: forming a multilayer on a substrate to be processed; forming a resist upper layer film using an ArF excimer positive-type chemical amplification resist composition; removing acid-unstable groups from the exposed portion of the resist upper layer film by exposure and post-exposure baking; performing a hard bake at a higher temperature and shorter time than the post-exposure bake to volatilize the removed acid-unstable groups outside the resist upper layer film, creating a difference in the number of carbon atoms between the unexposed and exposed portions; removing the resist upper layer film from the exposed portion by dry development using an oxygen-containing gas plasma to separate the pattern; and etching the pattern of the resist upper layer film onto the lower multilayer.

The invention belongs to a preparation method of pharmaceutical and chemical intermediates, and discloses a method for reductive silanization of activated olefin by nickel-catalyzed alpha-benzoyl alkyl bromide and chlorosilane, which comprises the following steps of: synthesizing the alpha-benzoyl alkyl bromide from alkyl aldehyde, reacting the alpha-benzoyl alkyl bromide serving as a reaction substrate and chlorosilane serving as a catalyst in the presence of a catalyst; a nickel catalysis technology is adopted to realize reductive silanization reaction of activated olefin. Compared with other synthesis methods, the alpha-benzoyl alkyl bromide synthesized by aldehyde is used as a reaction substrate and is a chemical which is wide and easy to obtain. Compared with a traditional synthesis method, nickel catalysis serves as a green energy source, the reaction condition where nickel catalysis participates is milder, functional group compatibility is better, and therefore a new thought is provided for efficient synthesis of the alkylsilane compound.

A patterning process including: forming a multilayer on a substrate for processing; forming a resist upper layer film using a positive chemically-amplified resist composition for ArF excimer; removing the acid-labile group in an exposed portion of the resist upper layer film by exposure and post-exposure bake; performing a higher temperature hard bake for a shorter time than post-exposure bake allowing the removed acid-labile group to volatilize out of the resist upper layer film and a number difference of carbon atoms between an unexposed and exposed portion; removing the resist upper layer film in the exposed portion with a gas plasma containing oxygen by dry development pattern separation; and transferring the resist upper layer film pattern to the multilayer underneath by etching. The patterning process obtains a fine pattern having a narrow pitch by dry development using a (meth)acrylic polymer usable for ArF patterning as the main skeleton and without silylation.

A method for treating surface of substrate, the method including forming a film including a high molecular weight condensate of a silylation agent on the surface thereof to allow a substrate having a plurality of regions to be modified at modification degrees that are different depending on materials of the regions on a surface of the substrate. The method includes preparing a substrate having a surface including two or more regions having different materials; exposing the surface to a surface treatment agent; and baking the substrate, the method not including rinsing the surface with a liquid between the exposing and the baking, the surface treatment agent including a silylation agent and not a nitrogen-containing heterocyclic compound, the silylation agent including organomonosilane that has 2 to 4 nitrogen atoms bonded to a silicon atom.

The present disclosure discloses a method for synthesizing an amide and / or a polypeptide using a temporary protected amino acid as an ammonia component. In the present disclosure, a ynamide compound is used as a condensing agent, a low-cost unprotected amino acid is used as the raw material, a silylation reagent is used to temporarily protect the amino acid to perform a condensing reaction, and after the construction of a peptide bond is achieved, a target polypeptide carboxylic acid can be obtained by a simple acid treatment, which can be directly used for the condensation of the next amino acid.

The process for preparing vinyl-functionalized chlorosilanes is carried out by the dehydrogenation and silylation of hydridochlorosilane and ethylene, both in the gas phase, in the presence of a heterogeneous rhenium catalyst. This process can be used to prepare vinyldimethylchlorosilane at ambient pressure.

The invention provides a metal modified molecular sieve coated SiO2 catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalytic conversion of CO2 and light alkane. According to the method, the metal modified molecular sieve is sequentially subjected to H2 reduction-oxidation pretreatment and silanization treatment, fine regulation and control of the chemical state of a metal active center are realized through H2 reduction-oxidation pretreatment, and then the active center is physically fixed and the acidity of the outer surface is regulated and controlled by using a SiO2 coating layer, so that the cracking side reaction is effectively inhibited, the aromatization selectivity is improved, and the aromatization effect is improved. The metal active center can be obviously stabilized through the synergistic effect of the two, so that the catalyst has excellent carbon deposition resistance and long-acting stability when being applied to aromatization of CO2 and low-carbon alkane.

The present invention provides a curable composition that yields a cured product with good tensile strength, a cured product of the curable composition, and a method for manufacturing the curable composition. [Solution] A curable composition comprising polymer A and polymer B, wherein polymer A is an oxyalkylene polymer having two or more terminal groups in one molecule, the terminal groups not having a divalent organic group represented by -C(=O)NH-, and the terminal groups having at least one group selected from the group consisting of a specific reactive silicon group, an unsaturated group, and a hydroxyl group, and having a silylation rate of 85 to 100 mol%, and polymer B is an oxyalkylene polymer having two or more terminal groups in one molecule, the terminal groups having at least one group selected from the group consisting of a specific reactive silicon group, an isocyanate group, an amino group, and a hydroxyl group, and having a specific organic group.

A method for preparing a powdered silylated cellulose is disclosed. The method includes preparing a reaction product in the form of a powder that can be mixed and handled with conventional powder handling equipment.

A curable composition that yields a cured product with excellent weather resistance, a cured product of the curable composition, and a method for manufacturing the curable composition. [Solution] A curable composition comprising polymer A and polymer B, wherein polymer A is an oxyalkylene polymer having two or more terminal groups in one molecule, the terminal groups not having a divalent organic group represented by -C(=O)NH-, and the terminal groups having at least one group selected from the group consisting of a reactive silicon group, an unsaturated group, and a hydroxyl group, and having a silylation rate of 85 to 100 mol%, and polymer B is an alkyl (meth)acrylate polymer having a reactive silicon group.

This invention provides a method for producing silica aerogel powder that reduces the silylation treatment time using siloxanes, which previously accounted for the majority of the manufacturing time. [Solution] A method for producing silica aerogel powder, characterized in that when performing a silylation treatment by adding siloxanes and an acid catalyst to a mixed solvent of water and a hydrophilic organic solvent in which the gelled material is dispersed, the siloxanes and concentrated sulfuric acid are mixed together in advance to form a mixed solution, and then the mixed solution of siloxanes and concentrated sulfuric acid is added to the mixed solvent of water and a hydrophilic organic solvent in which the gelled material is dispersed to perform the silylation treatment.

Polymer compositions including a silylated polymer derived from a polydiene polymer modified with a grafting agent including a silyl group and polar functional group. The polymer compositions are rubber blends that can be cured, wherein the silylated polymers aid in providing cured products thereof, such as tires, with improved properties. Methods for preparing the compositions and cured products such as tire components.