259 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.

A thiol masterbatch composition for preparing a UV curable composition is provided, the thiol masterbatch composition comprising at least 70% by weight of a thiol compound, and at least one stabilizer. A kit for providing an ultraviolet curable composition includes: a first portion including a thiol masterbatch composition therein; and a second portion separate from the first portion and including a (meth) acrylate composition therein. A method of making a UV curable composition includes combining a thiol masterbatch composition and a (meth) acrylate composition.

The invention discloses a polyurethane blue light protection optical material and a preparation method thereof. The polyurethane blue light protection optical material is formed by polymerizing a three-component system of isocyanate, a thiopropane trithiol compound and a light absorber mixture, has the advantages of high refractive index and high light transmittance, also has excellent blue light selective protection capability, can perform accurate regulation and control protection on blue light with different wavelengths of 385-500nm, and has good application prospects. The refractive index of an optical lens made of the blue-light-resistant material is larger than or equal to 1.71, the transmittance of short-wave blue light of 385-445 nm is smaller than or equal to 32.2%, the transmittance of long-wave blue light of 475-500 nm is larger than or equal to 70%, the transmittance of visible light of 600-780 nm is larger than or equal to 90%, and a wider material selection range is provided for application of high-end blue-light-resistant optical components.

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 discloses a preparation method of a waterborne polyurethane dispersion with excellent corrosion resistance, which comprises the following steps: (1) firstly carrying out vacuum dehydration on polyol, a micromolecular polyhydroxy chain extender and a hydrophilic chain extender, and then adding polyisocyanate to carry out polymerization reaction; the preparation method comprises the following steps: firstly, adding an alkynyl silane coupling agent into a reaction kettle, then adding micromolecular diol, diol containing an alkynyl side chain and a micromolecular diamine chain extender, carrying out a chain extension reaction, and finally, adding a monoamino silane coupling agent, and carrying out an end capping reaction, so as to prepare a polyurethane polymer; (2) dispersing the polyurethane polymer solution into water to obtain a polymer emulsion; and (3) adding a dithiol compound and an initiator into the polymer emulsion, so that an alkyne group on a polymer side chain and a sulfydryl of thiol are subjected to a click coupling reaction, and the waterborne polyurethane dispersion with the side chain containing free sulfydryl is obtained. According to the invention, the micromolecular mercaptan corrosion inhibitor is grafted to a side chain of a waterborne polyurethane molecule, and the obtained waterborne polyurethane has significantly improved corrosion resistance.

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.

The invention relates to preparation and low-temperature recovery methods of ester group-containing functionality-controllable epoxy resin and a composite material thereof. The method comprises the following steps: carrying out click chemical reaction on a thiol compound and carbon-carbon double bond-containing epoxide in a solvent under the initiation of 365nm ultraviolet light at the reaction temperature of 0-20 DEG C for 0.25-6 hours, and drying the solution by distillation to obtain the ester group-containing functionality-controllable epoxy resin, the molar ratio of sulfydryl to carbon-carbon double bonds in the thiol compound is 1: 1. According to the invention, an ester group-containing structure is introduced through click chemistry, and the controllability of the functionality degree of the epoxy resin is realized, so that the crosslinking density of a cured product is accurately regulated and controlled. The design not only endows a cured product with an excellent toughening effect, higher glass transition temperature and remarkably improved mechanical properties, but also endows the cured product with green and efficient degradation properties.

A polyamide separation layer is arranged on a porous supporting layer of the polyamide composite membrane, and the separation layer has the following characteristics: a Fourier transform attenuated total reflection infrared spectrometer is adopted for characterization, the ratio of the peak height at 2561 cm <-1 > to the peak height at 1661 cm <-1 > is 0.03-0.15%, and the ratio of the peak height at the 2561 cm <-1 > to the peak height at the 1661 cm <-1 > is 0.03-0.15%. And the content of sulfur atoms on the surface, which is analyzed and measured by an X-ray photoelectron spectrometer, is 0.5-2.5 mol%. According to the polyamide composite membrane, the water yield and the desalination rate are not reduced, the oxidation resistance is greatly improved, and the polyamide composite membrane has a wide application prospect in sea water desalination by adding a multifunctional epoxy and / or multifunctional double-bond compound into a water phase and adding a multifunctional thiol compound into an oil phase and carrying out heating and / or ultraviolet radiation.

The invention relates to a nonlinear optical crystal and crystal combined adhesive and a preparation method thereof. The nonlinear optical crystal and crystal combined adhesive comprises the following components in parts by weight: 40-70 parts of hydrogenated bisphenol A type acrylate monomer; 20 to 40 parts of a polyfunctional thiol compound; the core of the core-shell structure nanoparticles is ZrO2, the shell of the core-shell structure nanoparticles is SiO2, the particle size of the core is 20-50nm, and the thickness of a shell layer is 3-8nm; and 0.1 to 0.5 part of a coupling agent containing a phosphate group. Through accurate regulation and control of the ZrO2atSiO2 core-shell nanoparticles, the refractive index of the adhesive can be adjusted in a range of 1.65-2.10, and is highly matched with the refractive index 1.7-2.2 of nonlinear optical crystals such as KTP, BBO and LBO, so that the Fresnel loss of a bonding interface is reduced to be less than or equal to 0.5 dB / cm, the laser frequency conversion efficiency is remarkably improved, agglomeration is effectively inhibited by the core-shell structure of the nanoparticles, and the laser frequency conversion efficiency is improved. The light transmittance of a cured adhesive layer under common laser wavelengths such as 1064 nm, 532 nm and 355 nm is larger than or equal to 99.5%, the adhesive layer is suitable for a high-power laser system, by adding the quantum dot material, the refractive index matching of the specific wavelength can be further optimized, and the application scene is expanded.

Provided is a composition which contains a base generator and a polymerizable compound. The base generator contains a salt of a cation and an anion. The cation contains a carbonyl group and a partial structure comprising: a carbon atom; a nitrogen atom N1 bonded via a single bond to the carbon atom; and a nitrogen atom N2 bonded via a double bond to the carbon atom. The polymerizable compound contains a polyiso(thio)cyanate compound and a polythiol compound.

A polymerizable composition for optical materials of the present invention contains (A) a polyisocyanate compound, (B) a polythiol compound, (C) a photochromic compound, (D) a polyether compound having a number-average molecular weight of 50 to 10,000, and (E) a polyether-modified siloxane compound having a viscosity of 1 mPa·s or more and less than 1,600 mPa·s.

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 present invention belongs to the field of new materials. Provided are a polyether-type thiol composition and the use thereof. The polyether-type thiol composition comprises a polyether-type thiol compound and a compound as represented by formula (1), wherein the polyether-type thiol compound is mainly obtained by means of a reaction between a polyhydric alcohol, a halogenated hydrocarbon and a sulfhydrylization reagent, with the hydroxyl value of the polyhydric alcohol being 300-600 mgKOH / g; and the compound as represented by formula (1) is 0.01%-8% of the total mass of the polyether-type thiol composition. The polyether-type thiol composition can be used independently or used in a mixture with other thiol compounds; and the polyether-type thiol composition and an epoxy resin are cured under the action of an accelerant and an auxiliary agent so as to prepare an adhesive, and the adhesive can be used as a raw material to prepare a sealant. The polyether-type thiol composition can not only achieve rapid curing of an epoxy resin adhesive at room temperature, but can also improve the flexibility of an adhesive system, thereby improving the long-lasting safety of an application scenario of a sealant product in the building industry, thus maintaining the physical and psychological health of a human body for a long time.

The present invention relates to organic sulfides, optical materials such as plastic lenses, prisms, filters, and more particularly to a thiol composition and its application in optical materials. Adding a thiol compound of formula (1) to 2,3-disulfide (2-mercapto)-1-propanethiol or a thiol composition mainly containing the thiol compound, and controlling the content of the thiol compound of formula (1) within a certain range, can effectively solve the problem of impurity points in optical materials prepared mainly using 2,3-disulfide (2-mercapto)-1-propanethiol, and significantly improve the qualified rate of optical materials.

Disclosed herein is a photosensitive composition comprising a) at least one photoacid generator; b) at least one Novolak polymer; c) at least one acrylate polymer, comprising a component having structure (I); d) at least one glycidyl hydroxy benzoic acid condensate material comprising one or more compounds having structure (II); e) at least one heterocyclic thiol compound comprising a ring structure chosen from the general structures (III), (IIIa) or (IIIb); and f) at least one solvent. Disclose herein are also the methods of using this composition to form a resist pattern and the methods of using these resist patterns to produce metal lines. Disclosed herein are also compounds and mixtures of compounds having structure (II).

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.

To provide a resin composition which has good storage stability even under a high-temperature environment and is excellent in depth curability even with an LED light source.SOLUTION: A photocurable resin composition contains an epoxy (meth)acrylate, a pentaerythritol acrylate, a photopolymerization initiator, a phosphate ester, a thiol compound, and a light stabilizer. The pentaerythritol acrylate has a hydroxyl value of 170-350 mg KOH / g. The thiol compound contains a primary thiol.SELECTED DRAWING: None

Disclosed herein are photosensitive compositions comprising DNQ-PAC, a heterocyclic thiol compound or a tautomeric form thereof, an acrylate polymer, a novolac, and a PAG, and methods of using the same on substrates that may include thiophilic substrates.

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 invention discloses a method for determining the water content in a polythiol compound, and belongs to the technical field of analysis and testing. The determination method comprises the following steps: (1) preparing a blank solution; (2) taking a polythiol compound to be detected, and preparing a sample solution; (3) determining the mercaptan sulfur content of the polythiol compound sample; (4) determining the total manifestation moisture (namely the total amount of water and sulfydryl which react with the Karl Fischer reagent) of the sample solution; and (5) calculating to obtain the water content in the polythiol compound. The method has the advantages of high accuracy, low test cost, simple and feasible operation, short analysis time and the like.

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 an adhesive composition, comprising a resin material modifier and a wood adhesive; the resin material modifier uses 3-chloro-2-hydroxy-propyl as a capping group, has a sulfur content of 5% to 60%, and a hydroxyl content of 1% to 10%. In the adhesive composition system of the present invention, a polythiol compound is used as a substrate, and 3-chloro-2-hydroxy-propyl is used as an end-capping group. By controlling the mutual restraint of sulfur content and hydroxyl content, the resin material modifier can achieve stable compatibility in a conventional wood glue system, while achieving a good level of dimensional stability for reconstituted wood substrates, excellent anti-aging performance, a thickness expansion rate of ≤3.5%, and a width expansion rate of less than or equal to 3%. The present invention also provides an application of the adhesive composition.