166 results about "Mercaptan compound" patented technology

The invention belongs to the technical field of optical materials, and particularly relates to an environment-friendly mercaptan optical resin material and a preparation method thereof. Comprising the following steps: (1) uniformly mixing a catalyst, a release agent and a polyisocyanate compound to prepare a mixture; (2) adding titanium dioxide nanoparticles with different particle sizes, which are modified by a polythiol compound and a sulfydryl silane coupling agent, into the mixture; and (3) heating and curing to prepare the environment-friendly mercaptan optical resin material. On the basis of small-particle-size titanium dioxide, a small amount of large-particle-size titanium dioxide is added. The large-particle-size titanium dioxide is not prone to agglomeration and good in dispersity, in the blending process, the granular large-particle-size titanium dioxide is easier to disperse, and agglomeration of small-particle-size titanium dioxide is prevented. Due to the addition of the small-particle-size titanium dioxide and the large-particle-size titanium dioxide, the mechanical strength of the mercaptan optical resin is further improved on the basis of maintaining the high refractive index of the mercaptan optical resin.

The present invention provides a polymer production method comprising: (1) a step in which a monomer starting material including a prescribed monomer is polymerized by living radical polymerization using a radical initiator and a RAFT agent to obtain a polymer P-1 having a terminal structure that includes, at a terminal of the main chain thereof, a sulfur atom derived from the RAFT agent; (2) a step in which, subsequent to step (1), a radical generator and a thiol compound are added to a solution including the polymer P-1 and the same is heated to remove the terminal structure from the main chain of the polymer P-1; and (3) a step in which, subsequent to step (2), the solution including the polymer P-1 with the terminal structure removed therefrom is mixed with a poor solvent to precipitate the polymer as a solid and purify the same.

The invention belongs to the technical field of organic synthesis, and particularly relates to an alkyl pentafluorosulfenyl compound and a preparation method and application thereof.The preparation method comprises the following steps that in the protective gas atmosphere, in a solvent, SF5Cl serves as a pentafluorosulfenyl source, an olefin compound serves as a reaction substrate and a free radical trapping agent, a thiol compound serves as a hydrogen source, and the alkyl pentafluorosulfenyl compound is obtained through a one-step reaction; under the action of an olefin additive, the alkyl pentafluorothio compound is constructed by a one-step method through a visible light-induced free radical process, and the olefin additive is used for inhibiting generation of a pentafluorothio chloride byproduct from a pentafluorothio source and an olefin compound. According to the method disclosed by the invention, a series of alkyl pentafluorosulfenyl compounds can be prepared by only needing olefin double bonds in substrates and selecting more substrates through the reaction, the reaction is simple, the reaction condition is mild, the reaction can be completed under visible light, the reaction time is short, the implementation is easy, and the method is suitable for industrial production. And a method support is provided for further screening the alkyl pentafluorosulfenyl compound with excellent biological activity.

It is an object of the present invention to provide a monomer which can provide a cured product having both high toughness and rigidity. The present invention is a (meth)acrylate (D) which is a reaction product of a thiol compound (A) having two or more mercapto groups; an iso(thio)cyanate compound (B) having two or more iso(thio)cyanato groups; and a hydroxy (meth)acrylate compound (C) having one or more polymerizable groups.

To provide a curable resin composition for flexible film coating capable of forming a cured film excellent in flexibility and scratch resistance.SOLUTION: The curable resin composition for flexible film coating according to an embodiment contains a urethane (meth)acrylate and a tetrafunctional thiol compound. The urethane (meth)acrylate is a reaction product of a raw material containing: a pentaerythritol (meth)acrylate having a hydroxyl value of 150-240 mg KOH / g; and an aliphatic polyisocyanate.SELECTED DRAWING: None

The application provides a dithiol modified copolymer and a preparation method and application thereof, and particularly relates to the technical field of lithium batteries. In the dithiol modified copolymer, the copolymer is a branched diene-vinyl pyridine copolymer, which is mainly obtained by copolymerization of branched diene and vinyl pyridine. The dithiol modified copolymer provided by the application has a main chain composed of flexible branched diene units, which endows the copolymer with a good elastic skeleton structure; vinyl pyridine is introduced as a functional monomer, so that a pyridine group is formed on the side chain of the copolymer; a dithiol compound introduces a thiol group (-SH) to the copolymer, and finally, the dithiol modified copolymer has a flexible main chain structure, and the side chain simultaneously contains a pyridine group and a thiol group, and has good elasticity and functional characteristics.

The polythiol composition according to an exemplary embodiment includes a tetrafunctional polythiol compound and a parapolythiol compound, the parapolythiol compound comprising C 13 H 28 S9 represents compounds and compounds derived from C 15 H 32 S 10 The compounds are indicated. The proportion of parapolythiol compounds, as measured by high-performance liquid chromatography (HPLC), ranges from 1% to 5%. By adjusting the content of parapolythiol compounds, optical products with excellent transmittance and optical properties can be manufactured.

Conventional two-component resin compositions containing a crosslinkable silyl group-containing organic polymer and an epoxy resin have problems, such as long gel times due to slow reaction times, resin dripping when used on surfaces other than flat surfaces, and long tack times for preventing an adherend from moving during processes. The present disclosure addresses the problem of providing a two-component resin composition having excellent gel time and compatibility at 25°C. The problem is solved by a two-component resin composition containing the following components (A) to (E). Component (A): an epoxy resin. Component (B): a chelate-based metal catalyst. Component (C): a crosslinkable silyl group-containing organic polymer. Component (D): a polyether skeleton-containing thiol compound. Component (E): an amine compound. (Components (A)-(E) are not silane coupling agents.)

The application provides a sulfide compound for inhibiting copper corrosion, and a structural formula of the sulfide compound is as follows: The application adds mercaptan compounds, alkyne and a photoinitiator into ethanol to obtain a mixed solution, then immerses a copper metal sheet into the mixed solution, and under the action of ultraviolet light, a click reaction occurs to synthesize the sulfide compound containing a C-S-C bond, so as to inhibit the corrosion of the copper metal and protect the copper metal, and the sulfide compound has a good effect of inhibiting the corrosion of the copper.

The present disclosure relates to a method for oxidation of mercaptans, comprising the following steps: contacting mercaptan compounds with a catalyst for oxidation reaction in the presence of oxygen; the catalyst is a composite catalytic material, which comprises a full-silica molecular sieve and a metal element M dispersed in the intracrystalline of the full-silica molecular sieve; the metal M is selected from one or more of manganese, iron, cobalt, nickel, palladium, platinum, copper and gold. The present disclosure uses a metal-containing hierarchical porous molecular sieve for mercaptan oxidation and dehydrogenation reaction, without adding additional alkali, high conversion rate and disulfide selectivity can be obtained at a lower temperature, which has high industrial application value.

The invention relates to cyclotrithio-tri (2-mercaptoethylthio) mercaptan as shown in a formula I and a preparation method and application thereof. A two-step method of thio reaction and nucleophilic substitution is adopted. In the step I, thiourea is used as a sulfur source, epoxy atoms in trioxymethylene are replaced by sulfur atoms one by one under the condition of strong acid, and 1, 3, 5-trithiacyclohexane is generated. In the nucleophilic reaction of acid catalytic activation in the step II, 1, 3, 5-trithioxane and Lewis acid are subjected to coordination complexation firstly, one sulfydryl in dithiol serves as a nucleophilic reagent to attack an electrophilic carbon center of a ring-opening intermediate, a new C-S bond is formed, and a linear intermediate containing sulfydryl is generated; according to the process, three thiol groups are introduced in sequence step by step, and sulfur alkylation substitution is completed. The obtained product has the characteristics of high purity, high light transmittance and large refractive index, and can be used for preparing optical materials with ultrahigh refractive index and high light transmittance.

A composition is provided comprising an organic ionic compound comprising at least one C = C double bond, a polythiol compound comprising a plurality of thiol groups, and a bridging compound comprising a plurality of C = C double bonds. A composite material, a method of forming the composite material, and an electrochemical device comprising the composite material are also provided.

Provided is a photocurable composition comprising: a) at least one monomer or / and oligomer bearing at least one functional group selected from the group consisting of (meth) acrylate-functional group, vinyl-functional and allyl-functional group or at least one monomer or / and oligomer bearing at least two of said functional groups with one of them being an allyl group, b) at least one polythiol bearing at least one secondary thiol group, and c) at least one photoinitiator. The said composition can be used in coatings, inks, adhesives and varnishes. A finished cured product made of the said composition is suitable for optical, electronic and opto-electronic applications.

A polythiol composition according to exemplary embodiments includes a first polythiol compound and a second polythiol compound having a molecular weight greater than that of the first polythiol compound and the number of functional groups greater than or equal to the number of functional groups of the first polythiol compound. A content of the second polythiol compound is 500 ppm to 20,000 ppm based on a weight of the first polythiol compound. The reaction rate of an isocyanate-based compound may be controlled through the second polythiol compound, thus to suppress a stria phenomenon and improve mechanical properties of an optical product.

The present invention provides a method for producing a polymer, said method comprising: (1) a step in which a monomer starting material including a prescribed monomer is polymerized by living radical polymerization using a radical initiator and a RAFT agent to obtain a polymer P-1 having a terminal structure that includes, at a terminal of the main chain thereof, a sulfur atom derived from the RAFT agent; (2) a step in which, subsequent to step (1), a radical generator and a thiol compound are added to a solution including the polymer P-1 and the same is heated to remove the terminal structure from the main chain of the polymer P-1; and (3) a step in which, subsequent to step (2), the solution including the polymer P-1 with the terminal structure removed therefrom is mixed with a poor solvent to precipitate the polymer as a solid and purify the same.

The invention provides a dithiol modified copolymer as well as a preparation method and application thereof, and particularly relates to the technical field of lithium batteries. In the dithiol modified copolymer, the copolymer is a branched chain diene-vinylpyridine copolymer, and is mainly obtained by copolymerizing branched chain diene and vinylpyridine. According to the dithiol modified copolymer provided by the invention, a main chain is composed of flexible branched chain diene units, so that the copolymer is endowed with a good elastic skeleton structure; vinylpyridine is introduced as a functional monomer, so that a pyridine group is formed on a side chain of the copolymer; the dithiol compound introduces a thiol group (-SH) into the copolymer, the finally obtained dithiol modified copolymer has a flexible main chain structure, a side chain contains a pyridine group and the thiol group at the same time, and the dithiol modified copolymer has good elasticity and functionalization characteristics.

A polythiol composition and the use thereof are provided. The polythiol composition includes a first polythiol compound having a structure as shown in formula I and a second polythiol compound having a structure as shown in formula II. The polythiol composition can significantly improve the material leakage condition after pouring during the preparation of an optical material; by further defining the mass ratio of the first polythiol compound having the structure as shown in formula I to the second polythiol compound having the structure as shown in formula II, the polythiol composition can significantly reduce the material leakage rate after pouring; in addition, the reduction in terms of the refractive index is not significant, such that the use performance of the polythiol is improved.

The present invention addresses the problem of providing: a method for removing an Fmoc group, with which it becomes possible to highly efficiently remove dibenzofulvene generated during the synthesis of a peptide; a method for producing a peptide; and a method for producing a thiol compound that is protected with a 9-fluorenylmethyl group. According to the present invention, a method for removing an Fmoc group is provided, the method comprising: a step B in which an amino-group-containing compound having an Fmoc group is deprotected to produce the amino-group-containing compound from which the Fmoc group has been removed; a step C in which dibenzofulvene generated in the step B, a compound represented by the formula HS-L1-COOH (wherein L1 is as defined in the description), and a base are mixed together to produce a compound represented by the formula Fm-S-L1-COOH (wherein Fm represents a 9-fluorenylmethyl group); and a step D in which the amino-group-containing compound from which the Fmoc group has been removed is separated.

The invention relates to specific thioether-based fragrance precursor compounds of formula (I) which are derived from selected multithiol compounds and selected fragrances, and to a process for the preparation thereof. The invention also relates to detergents or cleaning agents, cosmetic agents and a perfume composition which contain such fragrance precursor compounds. The invention also relates to a method for long-lasting fragrancing of surfaces using the fragrance precursor compounds and agents according to the invention.

A method for producing a thiol compound including a light emission process in which light is emitted to a colored thiol compound or a composition containing the thiol compound. In the light emission process, it is preferable to emit light including light with a wavelength of 250 nm to 600 nm to the composition.

To provide a photosensitive composition that cures sufficiently at low temperatures and is preferably used for forming partitions in light-emitting elements. [Solution] A photosensitive composition comprising a compound (A) having an ethylenically active carbon-carbon double bond, one or more thiol compounds (B) selected from the group consisting of thiols and thiol precursors, and a photoradical initiator (C). The ratio of thiol compounds (B) in the total solid content of this photosensitive composition is 10% by mass or more. Furthermore, this photosensitive composition does not contain ultraviolet absorbers, or if it does, it is less than 3% by mass of the total solid content.

Provided is a curable resin composition, for flexible film coating, capable of forming a cured film excellent in flexibility and scratch resistance. A curable resin composition for flexible film coating according to an embodiment includes urethane (meth)acrylate and a tetrafunctional thiol compound. The urethane (meth)acrylate is a reaction product of a feedstock containing an aliphatic polyisocyanate and pentaerythritol (meth)acrylate having a hydroxyl value of 150-240 mgKOH / g.

An etching composition including an alkaline compound (A) and a thiol compound (B), wherein the etching composition dissolves silicon.

This method for manufacturing an optical film with a functional layer, in which a functional layer is laminated on an optical film, includes: a coating step of coating the optical film with a radically polymerizable curable composition; and a radiation step of radiating active energy rays onto a coated surface of the radically polymerizable curable composition on the optical film to cure at least a part of the radically polymerizable curable composition. The radiation step is a step of radiating active energy rays under an atmosphere having an oxygen concentration of 5% or more, the radically polymerizable curable composition contains at least one selected from the group consisting of an amino-based photopolymerization initiator and a thiol compound, and the functional layer has a thickness of less than 5 μm.

A flux containing rosin, a solvent, a thixotropic agent, a thiol compound, and an activator, in which the thiol compound includes a compound (Tp) having a benzenethiol skeleton in which one or more hydrogen atoms on a benzene ring are substituted with a mercapto group (—SH), is provided in the present invention. As the compound (Tp), at least one thiol compound selected from the group consisting of 2-aminobenzenethiol, 4-aminobenzenethiol, 3-aminobenzenethiol, and benzenethiol is preferable. According to such flux, a change in viscosity of the solder paste with time can be further suppressed.

The invention belongs to the technical field of adhesive tape materials, and particularly relates to a halogen-free flame-retardant power-on viscosity-reducing adhesive tape and a preparation method thereof. The preparation method of the halogen-free flame-retardant power-on viscosity-reducing adhesive tape comprises the following steps: adding 90-100 parts by weight of an electro-debonding material, 70-80 parts by weight of a thiol compound, 6-10 parts by weight of an ionic liquid and 6-10 parts by weight of graphite into 200-240 parts by weight of dichloromethane, stirring for 20-30 minutes to obtain a glue solution, coating a PET release film with the glue solution, baking, compounding with a PP protective film, and curing to obtain the halogen-free flame-retardant power-on viscosity-reducing adhesive tape. The halogen-free flame-retardant power-on viscosity-reducing adhesive tape is obtained; according to the adhesive tape, the oxygen index can be improved while a good electro-stripping effect can be ensured.

This photosensitive composition contains: a compound (A) having an ethylenic carbon-carbon double bond; one or more thiol compounds (B) selected from the group consisting of thiols and thiol precursors; and a radical photoinitiator (C). When the viscosity of the photosensitive composition is measured with a Brookfield viscometer at 25°C and at a rotation speed of 5 rpm, the viscosity is η0. In addition, after the photosensitive composition is left to stand for 5 hours at 100°C then allowed to cool naturally at 25°C, the photosensitive composition has a viscosity of η1 obtained by measuring the photosensitive composition with a Brookfield viscometer at 25°C and at a rotation speed of 5 rpm. In this case, the viscosity increase, as represented by {(η1-η0) / η0}×100 (%), is 5.0% or less.

The invention relates to the technical field of high polymer materials, and discloses a temperature latent curing agent and a preparation method thereof.The curing agent is prepared from a polyamine compound and a polythiol compound through a proton transfer reaction at the temperature of 15-30 DEG C. In the reaction, the molar ratio of active amine hydrogen to thiol groups is 1: (0.9-1.1), and a stable ion pair structure is formed. The invention also discloses a single-component epoxy curing system containing the curing agent, epoxy resin and a dielectric constant jump additive. The system is endowed with excellent storage stability by utilizing an ion pair structure; meanwhile, after heating, the compatibility of the dielectric constant jump additive and the epoxy resin is changed, and the dielectric constant of the system is triggered to rise, so that ion pair constraint is weakened, and the curing agent is dissociated and rapidly cured at a moderate temperature. According to the technology, the contradiction between latency and curing conditions is solved, and a cured product has good thermal and mechanical properties.

The polythiol composition according to the exemplary embodiment includes a first polythiol compound and a second polythiol compound having a molecular weight higher than that of the first polythiol compound and a number of functional groups greater than or equal to that of the first polythiol compound. The content of the second polythiol compound is 500 ppm to 20,000 ppm based on the weight of the first polythiol compound. The reaction rate of the isocyanate-based compound can be controlled by the second polythiol compound, thereby preventing the streak phenomenon of the optical product and the mechanical properties of the optical product can be improved.