26 results about "Glycoluril" patented technology

The preparation method comprises the following steps: mixing 20-40 parts by mass of substituted hydroxymethyl glycoluril, 45-85 parts by mass of mercaptocarboxylic acid and 0.5-3 parts by mass of an acidic catalyst, stirring and reacting for 1-10 hours at the temperature of 50-150 DEG C under the pressure condition of-0.01 to-0.1 MPa, adding 300-800 parts by mass of an organic solvent for diluting after the reaction is finished, washing and purifying with deionized water, and collecting an organic layer, thereby obtaining the mercaptan curing agent. Concentrating and drying to obtain the mercaptan curing agent. According to the thiol curing agent, the rigid glycoluril group is introduced, so that the rigidity of a cured product structure is improved, and the mechanical property, the adhesive property, the heat resistance and the damp-heat aging resistance of a cured product are improved; four tertiary amine groups in the substituted glycoluril have a certain self-promotion effect on a thiol curing epoxy reaction, and the curing reaction temperature is reduced under the condition that an accelerant is not added; the glycoluril-containing thiol epoxy resin curing agent disclosed by the invention has good application value and development prospect.

The invention belongs to the field of organic synthesis, and particularly relates to a method for industrially producing 2-chloronicotinic acid, which comprises the following steps: carrying out chlorination on ethyl nicotinate in the presence of a catalyst metal benzimidazole ionic liquid IL-1 and a chlorinating agent tetrachloro glycoluril to generate ethyl 2-chloronicotinate; 2-chloronicotinic acid ethyl ester is subjected to a hydrolysis reaction in the presence of alkali, then the pH value of the solution is adjusted to be 2-4 with acid, and 2-chloronicotinic acid is obtained. The method has the advantages of mild reaction conditions, no use of dangerous raw materials, environmental protection, simple post-treatment operation, high yield and purity, and suitableness for industrial production.

The invention discloses a 1, 3, 4-tris (3-mercaptobutyl carbonyl propyl)-6-(3-methyl butyl carbonyl propyl) glycoluril compound and a preparation method and application thereof.The 1, 3, 4-tris (3-mercaptobutyl carbonyl propyl)-6-(3-methyl butyl carbonyl propyl) glycoluril compound has a rigid glycoluril parent nucleus, and has the advantages that the rigidity of the glycoluril parent nucleus is greatly improved, and the yield of the 1, 3, 4-tris (3-mercaptobutyl carbonyl propyl)-6-(3-methyl butyl carbonyl propyl) glycoluril compound is increased; three nitrogen atoms on a glycoluril parent nucleus are connected with three 3-mercapto butyl carbonyl propyl flexible long chains with reactive mercapto terminals through ester bonds, and another nitrogen atom is connected with a 3-methyl butyl carbonyl propyl flexible long chain. Based on the chemical bond action of a rigid node of a rigid glycoluril parent nucleus, a flexible long chain, a sulfydryl group and an epoxy resin epoxy group, an epoxy resin composition prepared by using the compound as a curing agent has relatively good fracture toughness and impact resistance, and keeps rigidity and heat resistance.

The invention provides a well wall stabilizer for drilling fluid as well as a preparation method and application thereof. The invention provides a well wall stabilizer for drilling fluid. The raw materials of the stabilizer comprise cucurbituril and cyclodextrin, the cucurbituril is an annular cage compound formed by connecting 2n methylene bridges with n glycolurils, and n is selected from 5-20. Wherein cucurbituril is called Q [n] for short. The invention provides a preparation method of a stabilizer. The preparation method of the stabilizer comprises the step of mixing water, cucurbituril, an alkali supply agent, cyclodextrin, a surfactant, organic silanol and a salt bridging agent to obtain the stabilizer. The invention provides the drilling fluid well wall stabilizer prepared from cucurbituril and cyclodextrin, the prepared drilling fluid well wall stabilizer is used in drilling fluid, the rolling dispersion recovery rate of the drilling fluid can reach 65% or above, and the membrane efficiency of the drilling fluid can reach 17% or above.

The disclosure herein relates, inter alia, to inventive cucurbituril compounds and glycoluril compounds having formula (II), glycoluril compounds having formula (II'), glycoluril bisethers of formula (III), glycoluril dimers of formula (IV), glycoluril tetramer compounds of formula (V), and novel methods for their preparation using sodium 4,4'-(1,4-phenylenebis(oxy))bis(butane-1-sulfonate), which result in significantly improved purity and yields of intermediates and final products.

The present invention relates to an antifoaming agent based on ethoxylation reaction and a preparation method thereof, belonging to the technical field of antifoaming agents. The antifoaming agent of the present invention has a branched structure and contains multiple branched ethoxy chain segments. The core glycoluril group inside has good stability and hydrophilicity, which can reduce the surface viscosity of the liquid film, increase the drainage speed of the liquid film. The networked branched ethoxy chain segments can be effectively spread on the interface of the liquid film, reducing the surface tension at the spreading position, and causing the liquid inside the liquid film to move towards the position with high surface tension, prompting the liquid film to quickly become thinner and achieving defoaming. The spiroether bond and the bulky spiro structure near the networked branched ethoxy chain segments can form hydrogen bonds with hydrogen atoms in water, making the nearby glycoluril groups and ethoxy chain segments more likely to combine with water, promoting foam inhibition and defoaming. They can also prevent the networked branched ethoxy chain segments from approaching and entangling with each other, improving the dispersion uniformity of the networked branched ethoxy chain segments and increasing the foam inhibition and defoaming efficiency of the functional groups.

The invention discloses a glycoluril-based amino-terminated latent epoxy curing agent as well as a preparation method and application thereof. The curing agent has a 3a, 6a-substituted glycoluril core skeleton, intermolecular hydrogen bonds are destroyed through substituent Y of nitrogen atoms on a glycoluril ring so as to adjust the melting point (40-180 DEG C), and then the incubation period and the curing initiation temperature are accurately regulated and controlled; meanwhile, the performance of a cured product is regulated and controlled through a diamine group X connected with bridgehead carbon atoms. The preparation method comprises the following three steps: oxidizing diethyl tartrate, condensing the oxidized diethyl tartrate and urea to synthesize diethyl glycoluril, carrying out N-alkylation modification, and carrying out amine ester exchange to introduce double-end amino groups. The curing agent can solve the contradiction that the heat resistance and toughness of the existing amine curing agent are difficult to consider at the same time, realizes room-temperature long-acting latent-medium and high-temperature rapid curing, is particularly suitable for preparing a single-component epoxy adhesive, and meets the requirements of high-end scenes such as electronic packaging and aviation structure bonding.

Provided are a resin composition, a cured product, a prepreg, a metal foil-clad laminate, a resin composite sheet, a printed wiring board, and a semiconductor device. A resin composition containing: a resin (A) having a terminal group represented by formula (T1) and having an indane skeleton; a polyphenylene ether compound (B) having a carbon-carbon unsaturated double bond at the terminal; and at least one selected from the group consisting of an isocyanurate compound (C1) having two or more (meth) allyl groups, a glycoluril compound (C2) having two or more (meth) allyl groups, and a (meth) acrylate compound (C3) having three or more (meth) acryloyloxy groups.

The invention discloses a method for chemically purifying aldehyde VOCs (volatile organic compounds) in leather, an aldehyde catching agent is added in a spraying manner in a pre-prime coating stage in a leather coating procedure, and the method specifically comprises the following steps: 1) adding semicarbazide hydrochloride, glycoluril, sodium lauroyl glutamate and polyacrylamide into deionized water, and uniformly stirring to obtain the aldehyde catching agent; 2) uniformly adding the aldehyde trapping agent prepared in the step 1) to the meat surface of the leather in a spraying manner in a pre-prime coating stage in a leather coating procedure, standing until the aldehyde trapping agent is absorbed, drying, and entering a subsequent procedure after drying; the chemical purification method breaks through the limitation of traditional physical adsorption, effectively inhibits environmental release of aldehyde VOCs in leather products through an in-situ chemical immobilization strategy, has the characteristics of high reaction efficiency (gt, 90%), strong environmental durability, excellent eco-friendliness and the like, and provides an innovative solution for control of volatile aldehyde pollutants in the leather industry.

A capture complex comprising a cucurbituril compound having the Formula (I), wherein n is 5, 6, 7, 8 or 10; and for each glycoluril unit, R1 is selected from hydrogen, halogen, optionally substituted -(C1-C6)alkyl, optionally substituted -(C1-C6)haloalkyl or -OH; and at least one guest molecule, wherein the complex is configured to selectively and reversibly adsorb CO2.

This application provides a glycourea polythiol curing agent composition, relating to the field of polymer materials technology. The composition comprises a mixture of a glycourea trithiol compound and a glycourea dithiol compound consisting of positional isomers. This composition, used as a curing agent for epoxy resin compositions, can form a highly uniform cross-linked network structure, enabling the cured epoxy resin composition to simultaneously possess a high glass transition temperature, high flexural modulus, and ultra-high fracture toughness, achieving an excellent balance between rigidity and toughness.

The present disclosure provides a curable composition with which it is possible to realize improvement in a shear adhesive strength of a cured product and a durability of the cured product. The curable composition contains an epoxy compound (A) and a thiol compound (B). The thiol compound (B) contains a first thiol compound (B1) having a glycoluril structure and a second thiol compound (B2) having a thioether group, the second thiol compound different from the first thiol compound (B1).

The invention discloses a 1, 3, 4-tri (3-hydroxy propyl)-6-(3-methyl butyl carbonyl propyl) glycoluril compound and a preparation method and application thereof, and belongs to the field of materials.The preparation method comprises the steps that isovaleric acid reacts with thionyl chloride to prepare an isovaleryl chloride solution; the preparation method comprises the following steps: mixing 1, 3, 4, 6-tetra (3-hydroxy propyl) glycoluril with triethylamine, and carrying out acylation reaction on the mixture and an isovaleryl chloride solution at room temperature to obtain the 1, 3, 4-tri (3-hydroxy propyl)-6-(3-methyl butyl carbonyl propyl) glycoluril compound. According to the preparation method, acylation of one hydroxyl group in a 1, 3, 4, 6-tetra (3-hydroxypropyl) glycoluril molecule is realized, and the prepared compound can be used as a key intermediate for preparing a mercapto glycoluril derivative.

The invention discloses a photosensitive resin composition. The photosensitive resin composition comprises a thermosensitive compound (b), a coloring agent (d) and a thermal cross-linking agent (e). Wherein the heat-sensitive compound (b) includes a compound containing at least two phenolic hydroxyl groups, the colorant (d) has a maximum absorption wavelength in any range of 490-800 nm, the absorbance at the maximum absorption wavelength is Absmax, the ratio of the absorbance Abs365 at 365 nm to Absmax is 0.1% or more and less than 40%, and the thermal crosslinking agent (e) includes 1, 3-bis (methoxymethyl) urea, 1, 3-bis (methoxymethyl)-4, 4, 6-trimethyl-1, 3-bis (methoxymethyl)-1, 3-bis (methoxymethyl)-1, 3-bis (methoxymethyl)-1, 3-bis (methoxymethyl)-1, 3-bis (methoxymethyl)-1, 3-bis (methoxymethyl)-1, 3-bis (methoxymethyl)-1, 3-bis (methoxymethyl)-1, 3- The composition is one or a combination of more of 4, 5-diethoxy-1, 3-bis (hydroxymethyl)-2-imidazolidinone, 4, 5-dimethoxy-2-imidazolidinone, 4, 5-diethoxy-1, 3-bis (hydroxymethyl)-2-imidazolidinone and tetramethoxymethyl glycoluril. According to the photosensitive resin composition, the light transmittance within the wavelength range of 350-450 nm is not obviously reduced before exposure, so that the exposure sensitivity is prevented from being reduced. Meanwhile, after high-temperature curing, the cured film has excellent shading performance within the wavelength range of 350-780 nm through the change of the structure of the thermosensitive compound and the combination of the thermosensitive compound and two or more dyes or pigments, namely, the cured film has the optical density larger than or equal to 1.0.

The present invention discloses a highly water-soluble hyperoside product, which is an inclusion compound formed by an open-ring cucurbituril and hyperoside. The open-ring cucurbituril is composed of a glycoluril tetramer and a terminal aromatic group, and the terminal aromatic group is modified by a sodium propanesulfonate side chain, and its water solubility is significantly improved relative to that of the cucurbituril. The present invention utilizes the adaptive inclusion complex of the C-shaped adjustable cavity of the open-ring cucurbituril and hyperoside, coordinated with hydrogen bonds and π-π interactions, etc., to obtain a stable inclusion compound. The product significantly improves the water solubility and in vitro antioxidant activity of hyperoside, is expected to expand its scope of use and promote its in-depth development in medicine and food applications. At the same time, the product preparation method is simple, the conditions are mild, and it is suitable for industrial production and market promotion applications.

The invention discloses a deuterated glycoluril tetramer compound with aryl groups incorporated at two ends as shown in a formula (1), and a pharmaceutical composition containing the compound. The deuterated compound can be used for antagonizing a clinically used non-depolarized muscle relaxant, the antagonistic activity on rocuronium bromide and vecuronium bromide is remarkably superior to that of sugammadex sodium under the same dosage, and the antagonistic activity on cisatracurium besilate and rocuronium bromide is remarkably superior to that of a non-deuterated control molecule. # imgabs0 #

Disclosure herein relates to, inter alia, inventive cucurbituril compounds and novel methods of preparing thereof using a glycoluril compound having the formula (II), a glycoluril compound having the formula (II′), a glycoluril bis-ether of formula (III), a glycoluril dimer of formula (IV), a glycoluril tetramer compound of formula (V), and Sodium 4,4′-(1,4-phenylenebis(oxy))bis(butane-1-sulfonate, which result in significantly improved purity and yield of the intermediates and of the final products.

The disclosure herein relates, inter alia, to cucurbituril compounds of the invention and novel processes for preparing them using glycoluril compounds of formula (II), glycoluril compounds of formula (II '), glycoluril diethers of formula (III), glycoluril dimers of formula (IV), glycoluril tetramer compounds of formula (V), and sodium 4, 4'-(1, 4-phenylene bis (oxy)) bis (butane-1-sulfonate, the process results in a significant increase in purity and yield of intermediates and end products.

Provided is a photosensitive resin composition containing: (A) a photopolymerizable compound having an ethylenically unsaturated group, and an acidic substituent; (B) a compound having an ethylenically unsaturated group, and an isocyanurate ring or glycoluril ring; and (C) a maleimide resin having two or more N-substituted maleimide groups, and a group including a condensed ring composed of an aromatic ring and aliphatic ring. Also provided are a photosensitive resin film using said photosensitive resin composition, a printed wiring board, a production method therefor, and a semiconductor package.

The application discloses a 1,3,4-tri(3-hydroxypropyl)-6-(3-methylbutyryloxypropyl) glycoluril compound and a preparation method and application thereof, and belongs to the material field. The preparation method is characterized in that isovaleric acid is reacted with dichlorosulfide to prepare an isovaleryl chloride solution; 1,3,4,6-tetra(3-hydroxypropyl) glycoluril is mixed with triethylamine, and acylation reaction is carried out with the isovaleryl chloride solution at room temperature to obtain the 1,3,4-tri(3-hydroxypropyl)-6-(3-methylbutyryloxypropyl) glycoluril compound. The preparation method realizes acylation of one hydroxyl group in a 1,3,4,6-tetra(3-hydroxypropyl) glycoluril molecule, and the prepared compound can be used as a key intermediate and is used for preparing a mercapto glycoluril derivative.

The present invention discloses an additive and a cleaning process for solving the problem of double-insert front-side circumferential plating and printing in TOPCon cells, which relates to the technical field of solar cell production and manufacturing. The additive comprises the following components: an alkali corrosion catalyst, a polycarboxyl polymer, an organic acid, a chelating agent, a surfactant, lactic acid, tetramethylol glycoluril, hydroxypropyl-β-cyclodextrin, hyperbranched polytriazole hb-PTA-OEG, and water. The additive and the cleaning process can selectively etch polysilicon and adsorb on the surface of BPSG to protect it from alkali corrosion during the removal of circumferential plating. At the same time, the corrosion rate of circumferential plating in the alkali solution can be increased, so that the front-side polysilicon can be removed more quickly and thoroughly, and the gain effect on the battery efficiency is obvious.

The invention provides a photoresist composition, a photoetching patterned multilayer body and a preparation method of the photoetching patterned multilayer body, and relates to the field of photoresist. The photoresist composition is prepared from the following raw materials in parts by weight: 100 parts of alkali-soluble resin, 0.5 to 20 parts of onium salt compound, 3 to 50 parts of glycoluril compound, 0.01 to 1.0 part of alkaline compound, 0.01 to 1.0 part of acidic compound and 100 to 5000 parts of organic solvent, at least part of anions in the onium salt compound are fluoroalkyl sulfonate anions; n in the glycoluril compound is substituted by at least one hydroxyalkyl group, alkoxy group and alkyl group. The crosslinking activity of the glycoluril compound is generally low, and when the glycoluril compound with low crosslinking activity is combined with an onium salt compound serving as an acid generator for use, the trailing defect generated when the photoresist forms a pattern on the anti-reflection layer can be effectively improved, and a high resolution can be obtained.

The application discloses a 1,3,4-tris (3-mercapto butyryloxy propyl) -6- (3-methyl butyryloxy propyl) glycoluril compound and a preparation method and application thereof, and the 1,3,4-tris (3-mercapto butyryloxy propyl) -6- (3-methyl butyryloxy propyl) glycoluril compound has a rigid glycoluril nucleus, three 3-mercapto butyryloxy propyl flexible long chains with reactive thiol terminals are connected to the three nitrogen atoms of the glycoluril nucleus through ester bonds, and a 3-methyl butyryloxy propyl flexible long chain is connected to another nitrogen atom. Based on the chemical bond effect of the rigid node, the flexible long chain, the thiol and the epoxy group of the epoxy resin in the rigid glycoluril nucleus, the epoxy resin composition prepared by using the compound as a curing agent has good fracture toughness and impact resistance, and rigidity and heat resistance are maintained.

A photosensitive resin composition contains at least one compound selected from the group consisting of compound (C1) represented by formula (C1), compound (C2) represented by formula (C2), and a multimer of the compound (C2). Z each independently represents an oxygen atom or a sulfur atom. R31 each independently represents a monovalent hydrocarbon group or a group obtained by substituting at least one hydrogen atom in the monovalent hydrocarbon group with a mercapto group, and at least one R31 is a group obtained by substituting at least one hydrogen atom in the monovalent hydrocarbon group with a mercapto group when p is 1 and when p is an integer of 2 or more and all of Z is an oxygen atom. R32 and R33 each independently represent a divalent hydrocarbon group, and R34 represents a glycoluril ring structure or an isocyanul ring structure.

Disclosed are deuterated glycoluril tetramer compounds having aryl groups incorporated at both ends represented by formula (1), pharmaceutical compositions containing the compounds. The deuterated compounds are useful for antagonizing clinically used non-depolarizing muscle relaxants, and have significantly superior antagonistic activity against rocuronium and vecuronium to sugammadex at the same dose, and significantly superior antagonistic activity against cisatracurium and rocuronium to a non-deuterated control molecule.

The invention discloses a special solvent-resistant powder coating for sewing machines, which is made of the following ingredients: modified epoxy resin, a first filler, a second filler, titanium dioxide, phenolic resin, a curing agent, an antioxidant, a leveling agent, and tetramethoxymethyl glycoluril; wherein the weight ratio of the first filler to the second filler is 1:2; the powder coating prepared by the invention can maintain the integrity and performance stability of the coating under the condition of long-term contact with various organic solvents, and is not prone to dissolution, bubbling, shedding and the like. After being applied to the sewing machine, it can continuously protect the sewing machine for a long time. The powder coating prepared by the invention has excellent environmental performance. Since it does not contain organic volatiles during production and use, it will not cause pollution to the environment and meets environmental protection requirements. At the same time, the powder coating prepared by the invention can be recycled and reused, thereby improving the utilization rate of the powder material.