96 results about "Ester bond" patented technology

The application belongs to the technical field of automobile intelligent display and polymer optical material, and relates to a front windshield anti-reflection film for automobile AR-HUD and a preparation method thereof. The anti-reflection film comprises modified optical acrylic resin, 9,9-bis(4-hydroxyphenyl) fluorene, nano-silica sol, ultraviolet absorber, light stabilizer and leveling agent. The modified optical acrylic resin is modified by introducing o-diphenol structural unit, aryl boronic acid structural unit, beta-cyclodextrin structural unit and adamantane structural unit into the acrylate base structure to form a dynamic borate ester bond and a host-guest inclusion synergistic topological network structure through free radical copolymerization. The anti-reflection film significantly improves the reflection efficiency of the target wave band of AR-HUD while maintaining high visible light transmittance, and exhibits excellent optical stability and double image control ability in a humid heat environment, and is suitable for the field of optical functional film of automobile front windshield.

This application relates to bioabsorbable cationic steroidal antimicrobial (CSA) compounds or salts thereof having a structure of formula I, II or III: formula (I), formula (II) or formula (III), wherein R1-R 18 At least one of them (e.g., R) 18 This includes monoglycerides or diglycerides of fatty acids linked by ester bonds, and R1-R 18 At least one of them (e.g., R3, R7, and R) 12 ) is an amino acid linked to the steroid backbone via an ester bond or an amide bond, wherein: R 18 It has the following structure: -R 19 -(C=O)-O-C-CR 20 -CR 21 , where R 19 The radical is omitted or selected from alkyl, alkenyl, ynyl, and aryl, and R 20 and R 21 Independently selected from hydroxyl, alkylcarboxyl, and aminoalkylcarboxyl groups, provided that R 20 and R 21 At least one of them is an alkyl carboxyl group, R3, R7 and R 12 It has the following structure: R 24 R 23 N-R 22 -(C=O)-X-, where R 22 It is a substituted or unsubstituted alkyl group, X is oxygen or nitrogen, and R is... 23 and R 24 It is independently hydrogen, alkyl, alkenyl, alkynyl, or aryl. (I)(II)(III)

An oral pouch comprising a pouch envelope made of a chemically bonded nonwoven fabric which contains cellulose fibers and during the production of which an additional crosslinking agent that can form a covalent chemical bond, e.g. by means of ester or ether bonds, with cellulose molecules was added to the binder, and said oral pouch comprising a filling material arranged in the pouch envelope.

The application relates to the technical field of electronic packaging and discloses a glue sealing method for embedding FPC into a wearable device mold. The method comprises the following steps: cleaning and activating the surface of the FPC; coating a reactive thixotropic interface anchoring agent at a preset position, the anchoring agent is made of thermoplastic polyurethane, hydrophobic modified fumed silica and latent curing micro powder containing isophorone diisocyanate dimer and a temperature-sensitive catalyst, and a solid-state pre-gel layer with thixotropy is formed after drying; the FPC is loaded into the mold, and the pre-gel layer is used to realize suspension fixing by utilizing the friction force between the pre-gel layer and the mold wall; low-pressure injection molding is carried out, and the heat of the melt is used to initiate ring-opening crosslinking of the micro powder. The physical limiting effect of the pre-gel layer solves the problem of FPC injection positioning deviation, and the in-situ chemical reaction is excited by using the heat of pressure maintaining, urea-formaldehyde ester bonding and semi-interpenetrating networks are generated at the interface, and the bonding strength and the moisture and heat resistance reliability of the packaging interface are improved.

The present application relates to the technical field of industrial material application, further relates to a multi-functionality crosslinking agent, a dynamic crosslinking thermoplastic elastomer and a preparation method and application. The present application first synthesizes a benzene boronic acid group-containing multi-functionality crosslinking agent which has a better crosslinking degree to rubber than a di-functionality crosslinking agent and a better dynamic exchange probability than the di-functionality crosslinking agent in a subsequent use process; then modifies the rubber to introduce a double hydroxyl structure into the rubber molecular chain to obtain a hydroxylated modified rubber; and then uses the benzene boronic acid group-containing multi-functionality crosslinking agent and the hydroxylated modified rubber to prepare a thermoplastic elastomer based on a reversible crosslinking system containing a borate ester bond. The dynamic crosslinking thermoplastic elastomer provided by the present application has the advantages of high tensile strength, excellent elongation at break, high crosslinking density, repeated processing, and small mechanical property attenuation after repeated processing.

This invention provides a cycloheptatrienolone derivative of formula (1). In formula (1), R 1 It can be a hydrogen atom, a cyano group, a monovalent hydrocarbon group with 1 to 20 carbon atoms that can have substituents, a monovalent heterocyclic group with 2 to 20 carbon atoms that can have substituents, an acetyl group, or -COOY. 1 When n is 1, R 2 It can be a substituted alkyl group with 1 to 20 carbon atoms, a cycloalkyl group with 3 to 20 carbon atoms that may have substituents, a monovalent aromatic hydrocarbon group with 6 to 20 carbon atoms that may have substituents, a monovalent heterocyclic group with 2 to 20 carbon atoms that may have substituents, an acetyl group, or a -COOY group. 2 When n is 2 or more, R 2 The methyl group is bonded to R via an ester bond. 1 The bonded carbon atoms, with the remaining portion consisting of n-valent groups containing 1 to 20 carbon atoms in a chain hydrocarbon structure that can have ether bonds.

This invention relates to an aqueous polyurethane dispersion composition, an aqueous polyurethane dispersion, a preparation method, and applications. The composition comprises: 15-25 parts of a polyether soft segment polyol, 10-20 parts of a polycarbonate diol, 18-26 parts of an aliphatic or alicyclic isocyanate, 3-5 parts of a carboxyl-containing hydrophilic chain extender, 2-5 parts of ethoxylated trimethylolpropane, 0.3-1.0 parts of a phosphate-containing diol, 0.3-1.0 parts of a urea derivative chain extender, 1.5-3 parts of an organic amine neutralizer, 0.01-3 parts of a catalyst, and 25-40 parts of deionized water. The ethoxylated trimethylolpropane forms a branched structure encapsulating ester bonds, with the phosphate ester groups located at the chain ends, improving aluminum powder orientation. The urea derivative forms a reversible hydrogen bond network, balancing thixotropy. Compared with existing technologies, this invention solves the problems of poor hydrolysis resistance, insufficient aluminum powder orientation, and difficulty in balancing thixotropy in aqueous polyurethane.

This invention relates to the field of concrete, and more particularly to a novel flocculant specifically for washed sand and its preparation and application methods. The flocculant is prepared via free radical polymerization using unsaturated acids, amide monomers, polyether macromonomers, and asymmetric crosslinking agents as reactants. Based on its pH-responsive characteristics, this flocculant can intelligently switch between flocculant and water-reducing agent: during sand washing, it efficiently flocculates mud and fine powder in wastewater, promoting wastewater recycling; when it remains in manufactured sand and enters the alkaline environment of concrete, the ester bonds in the molecule can hydrolyze and break, degrading the flocculant into polycarboxylic acid fragments with a comb-like structure. This novel flocculant not only eliminates the problems of high water-reducing agent dosage and large slump loss caused by traditional flocculant residues, but the degradation products themselves can also play a dispersing role, helping to reduce the water-reducing agent dosage and improve the slump retention performance of concrete.

This invention provides a method for manufacturing a vinyl polymer, wherein a vinyl monomer is polymerized in the presence of a compound represented by formula (1). [Chemical 1] In formula (1), R 0 and R 1 Each of the following groups can be independently represented by a hydrogen atom, a cyano group, a monovalent hydrocarbon group that may have substituents, a monovalent heterocyclic group that may have substituents, an acetyl group, or -COOY. 1 When n is 1, R 2 It can be a monovalent hydrocarbon group that can have substituents, a monovalent heterocyclic group that can have substituents, an acetyl group, or -COOY. 2 When n is 2 or more, R 2 Through ester bond to R 0 With R 1 The bonded carbon atoms are followed by an n-valent group containing a chain hydrocarbon structure that can have ether bonds. X is an alkyl group or a monovalent electron-withdrawing group.

Disclosed is a novel room-temperature curable bio-based epoxy vitrimer with a simple design of the chemical structure. A hempseed oil-derived glycidyl ester type epoxy (HOEP) was synthesized and then blended with a bisphenol A epoxy (DER331) to manipulate the properties of the resulting vitrimer s. An aliphatic amine hardener, diethylenetriamine (DETA), was selected as hardener to realize the room temperature curing in presence of triethanolamine (TEOA) as the catalyst. Unlike the traditional glycidyl ether epoxy-amine the thermosets which are based on sable C—N and ether linkages, the epoxy vitrimer herein includes ester bonds with HOEP and hydroxyls formed from the reaction of amine and epoxy in its cross-linked network. Dynamic transesterification (DTER) between the ester bonds and hydroxyls take place at elevated temperatures, imparting the vitrimer significant stress relaxation behavior and repairability. This provided a viable method to produce room temperature curable epoxy vitrimer s.

The present invention provides a curable composition that possesses tackiness and plastic deformability in a semi-cured state and excellent strength after thermal curing, a semi-cured product of the curable composition, a substrate coated with the semi-cured product, a laminate containing the curable composition, and a method for manufacturing the same. [Solution] The curable composition according to the present disclosure contains a monofunctional (meth)acrylate (A1) and a polyfunctional (meth)acrylate (A2), which each contain a linear aliphatic hydrocarbon group that may have an ether bond and / or ester bond between carbon atoms and may have an alicyclic ring with a heteroatom as a substituent. A photopolymerization initiator (B), an epoxy resin (C), a thermosetting agent (D), and a tackifier (E) containing a terpene phenol resin.

The application discloses a kind of composite recycled material for air conditioner shell and preparation method thereof, belong to the technical field of recycled material, including the following mass fraction of raw materials: ABS recycled material 70~90 parts, ABS new material 10~30 parts, antioxidant 0.5~2 parts, aging repair agent 4~8 parts, peroxide 0.5~1 part, modified SBS 3~5 parts, wherein the aging repair agent is zinc dimethyl acrylate, wherein the molecular chain of modified SBS contains borate ester bond. Zinc dimethyl acrylate can gradually form nanoscale polymer particles under the action of peroxide, can be used as crosslinking point and react between the broken molecular chain in ABS recycled material, form stable crosslinking structure, make molecular chain reconnect, improve the mechanical properties of material. The addition of modified SBS can improve the dispersion ability of aging repair agent in matrix, optimize the crosslinking structure, further improve the material performance.

A process for preparing preferably degradable copolymers by free radical ring-opening polymerization using thionolactone monomers or thionocarbonate monomers, in the presence of a radical polymerization initiator. Also, the copolymers, which include thioester or thiocarbonate bonds, that are obtained by carrying out the process including the free radical ring-opening polymerization using thionolactone monomers or thionocarbonate monomers.

The application belongs to the technical field of wound dressings, and discloses a water-based gel dressing with antibacterial and scar prevention effects and a preparation method, wherein 3-fluoro-4-carboxyphenylboronic acid is introduced to graft chitooligosaccharide, a large number of catechol structures in tannic acid solution are combined with the phenylboronic acid bond to form a dynamic boron ester bond, and a network gel structure is formed by responding to the supermolecular forces such as hydrogen bonds, wherein the boron ester bond can be broken in response to the high ROS level of the wound microenvironment and the acidic environment caused by bacterial infection, so as to efficiently release celecoxib, a selective non-steroidal anti-inflammatory drug of cyclooxygenase-2, and the liposome of verteporfin is limited in volume and stays in the dressing for a longer time, so that the sustained and stable release can be maintained in the whole wound healing process, thereby achieving the effects of on-demand inflammation regulation and long-acting mechanical response regulation.

The present application relates to the technical field of chemical product processing, in particular to a low-gloss polyacrylate resin composition, a preparation method and application thereof, which comprises a modified polyacrylate resin solution, an epoxy-siloxane modifier, a vinyl trimethoxysilane oligomer, an organic metal catalyst, a viscosity regulator and a polymerization inhibitor; the ester bond in the modified polyacrylate resin is fixedly protected by the epoxy-siloxane modifier, and the ability of the epoxy-siloxane modifier is further enhanced by the vinyl trimethoxysilane oligomer, so that the problem that the gloss of the extinction type polyacrylate resin containing a bulky side group is irreversibly increased due to ester bond hydrolysis in a hot and humid environment is solved.

A protective film formation composition contains a polymer having a unit structure represented by formula (1-1), a compound or a polymer having phenolic hydroxy group other than catechol, (C) a thermal acid generator, and (D) a solvent.(Ar represents a benzene, naphthalene, or an anthracene ring; R1 represents a hydroxy, mercapto, amino, halogeno, or an alkyl group that has 1-10 carbon atoms and that may be substituted or interrupted by a hetero atom and may be substituted by a hydroxy group; n1 represents an integer of 0-3; L1 represents a single bond or an alkylene group having 1-10 carbon atoms; E represents an epoxy group; when n2=1, T1 represents a single bond or an alkylene group having 1-10 carbon atoms and may be interrupted by an ether bond, an ester bond, or an amide bond; and when n2=2, T1 represents a nitrogen atom or an amide bond.)

A cationic lipid represented by the following formula (1) (wherein symbols are as described in the SPECIFICATION) that may be used as a nucleic acid delivery carrier with good nucleic acid delivery efficiency is provided.

This invention belongs to the field of biomedical materials technology, and discloses a cellulose-based long-acting antibacterial material, its preparation method, and its application. The cellulose-based long-acting antibacterial material includes: a cellulose backbone; EDTA groups covalently grafted onto the cellulose backbone via ester bonds; and an ionic liquid anchored to the EDTA groups via multiple hydrogen bonds. The EDTA groups act as molecular bridges connecting the cellulose backbone and the ionic liquid, which remains in a monomeric state and is stably immobilized on the material surface through hydrogen bonds. This invention utilizes EDTA groups as molecular bridges to stably anchor the ionic liquid to the cellulose backbone surface through multiple hydrogen bonds, avoiding the problem of easy loss of physical load and overcoming the influence of covalent polymerization on antibacterial activity. After a 95-day accelerated aging test, the material still exhibits an antibacterial rate exceeding 99.9% against *Escherichia coli* and *Staphylococcus aureus*, meeting the needs of chronic wound care throughout the entire process.

This invention discloses a high-performance, yellowing-resistant TPU interlayer for laminated glass and its preparation method, belonging to the field of adhesives and polymer materials technology. This invention achieves permanent covalent anchoring with the glass substrate through silane chemical grafting, reversibly controls the interface molding quality through dynamic borate ester bonds, and achieves bulk free radical capture and antioxidant effects through the "inorganic-organic" synergistic effect of CeO2@GA. These methods synergistically solve the core problems of interfacial adhesion failure and bulk aging yellowing of TPU interlayers under humid and hot environments. The resulting TPU interlayer has a tensile strength of up to 24.1 MPa, an elongation at break of 480-550%, a phenolic yellowing resistance rating of 4.5-5.0, and a yellowing resistance Δb ≤ 0.45, exhibiting excellent comprehensive performance and broad application prospects in the field of laminated glass.

The object of the invention is to provide a treatment agent for synthetic fibers that can achieve both a reduction in the amount of thermally degraded material and suppression of tension fluctuations. A method for producing a synthetic fiber treatment agent that contains a nonionic surfactant (B) having a polyoxyalkylene skeleton without ester bonds and an ester component (A), and satisfies specific conditions 1 and 2, wherein the ester component (A) comprises at least one selected from an ester compound represented by general formula (1) and a compound having a structure in which polyoxyalkylene glycol and a fatty acid are ester-bonded, the nonionic surfactant (B) comprises a nonionic surfactant (B1) having an alkyl group having 12 to 15 carbon atoms, and the proportion of the nonionic surfactant (B) in the nonvolatile content of the treatment agent, the strong acid value, saponification value, iodine value, content of Zr and Ti elements, content of K and Na elements, and content of Si element are within specific ranges.

To provide cationic lipids that can be used as nucleic acid delivery carriers with good nucleic acid delivery efficiency. [Solution] A cationic lipid represented by the following formula (1) (the meaning of the symbols in the formula is as described in the specification). JPEG2026116229000074.jpg3577

To provide a non-aqueous hair composition that provides good manageability when drying hair and a moist feeling after drying, and a hair treatment method using the composition. [Solution] The non-aqueous hair composition contains (A) a kinematic viscosity at 37.8°C of 1.38 mm² or more by mass of 15% or more. 2 / s or more 13.0mm 2 The composition contains (B) hydrocarbons with an organic value of less than 500, (C) volatile acyclic silicones and / or isododecane, (D) highly polymerized methylpolysiloxanes and / or highly polymerized dimethiconol, and (A) compounds having ester bonds with an organic value of less than 500. The hair treatment method involves using the above non-aqueous hair composition.

This invention relates to the field of textile manufacturing technology, specifically to a method for preparing polyester fibers for automotive interior carpets by stretching. The method includes steps such as crosslinking modifier preparation, modified spinning melt formulation, low-temperature orientation stretching, high-temperature reactive stretching, and relaxation heat setting. The method combines polyester chips with a terminal hydroxyl hyperbranched multifunctional polysiloxane crosslinking modifier to covalently anchor flame-retardant and antistatic segments within the polyester macromolecular network. The key technology of this invention lies in the activation of titanium acetylacetonate during the high-temperature stretching stage, which promotes an ester exchange crosslinking reaction between the terminal hydroxyl groups of the modifier and the ester bonds of the polyester molecular chains, constructing chemical crosslinking points in situ under the stretched orientation state. This invention overcomes the defects of traditional physical blending agents, such as stress concentration, high breakage rate, and easy loss of function. By utilizing the orientation-crosslinking structure, it effectively prevents molecular chain slippage under pressure, effectively improving the irreversible deformation problem of carpets under long-term cyclic compression loads, and ensuring the fiber's durable high compression resilience, flame retardant, and antistatic properties.

A method for producing a residue for recycling, in which a depolymerization accelerator of a polymer having an ester bond (polymer E) is allowed to act on a resin mixture containing the polymer E to produce a depolymerization product, and removal of the depolymerization product is performed, thereby obtaining a residue in which the content of the polymer E is reduced.

Provided herein are cleavable peptides, cleavable peptide-based linkers, and compounds or conjugates containing the same, comprising an enzyme substrate peptide adjacent to a self- immolative dipeptide. The self-immolative dipeptides described herein can be bonded to a payload (e.g., a drug) via an ester or thioester bond, enabling traceless release of the payload following enzymatic cleavage of the substrate. Also provided herein are methods and compositions for using and producing the compounds and conjugates described herein, for example, for treating cancers.

The present application relates to a kind of refractory dispersant and its preparation method in the technical field of refractory additive, it is the comb structure copolymer, the copolymer includes styrene-maleic anhydride copolymer main chain, polyethylene glycol side chain grafted on the styrene-maleic anhydride copolymer main chain by ester bond, and phosphate radical;The polyethylene glycol side chain includes short-chain polyethylene glycol with molecular weight of 400-600 and long-chain polyethylene glycol with molecular weight of 800-1200.The present application realizes the precise division of function by using asymmetric compound polyethylene glycol side chain of specific molecular weight range, and controls esterification grafting degree is 50%-85%, not only can provide excellent initial wetting and dispersion force, ensure that slurry has excellent construction fluidity, but also can effectively prevent particle re-aggregation and sedimentation under static or shear, so as to fundamentally solve the technical problem that traditional dispersant is difficult to consider high initial fluidity and long-term anti-settling property, plasticity.

To provide a non-aqueous hair composition that provides good manageability when drying hair and a soft, smooth feel after drying, and a hair treatment method using the composition. [Solution] The non-aqueous hair composition contains (A) a kinematic viscosity at 37.8°C of 1.38 mm² or more by mass of 15% or more. 2 / s or more 13.0mm 2 The composition contains (B) a hydrocarbon with a molecular weight of 0.50 or less, (C) a volatile acyclic silicone and / or isododecane, (D) a compound having an ester bond with an organic value of 350 to 520 and an inorganic value of 70 to 240, and the hair treatment method uses the above non-aqueous hair composition.

The present application relates to the field of slow-release compound fertilizer preparation, in particular to a green organic compound fertilizer and a preparation method thereof.The green organic compound fertilizer comprises an inner core, the inner core being a fertilizer base particle containing organic matter and inorganic nitrogen, phosphorus and potassium; a coating layer, the coating layer being coated on the surface of the inner core, the coating layer being formed by cross-linking and solidification of a coating liquid and a solidification liquid on the surface of the inner core; the coating liquid comprising an aqueous solution of a lignin-polypeptide graft copolymer and a borate, the lignin-polypeptide graft copolymer being formed by connecting carboxymethylized alkali lignin and an amino-rich polypeptide or a polyaspartic acid derivative through an amide bond; the solidification liquid being an aqueous solution containing a metal ion cross-linking agent; in the coating layer, the lignin-polypeptide graft copolymer and the borate form a borate ester bond, and the lignin-polypeptide graft copolymer and the metal ion cross-linking agent form a metal coordination bond.The present application effectively avoids the secondary pollution problem caused by the degradation of traditional high-molecular chemical resin coating materials to the soil.

The application relates to the technical field of pharmaceutical chemistry, and discloses a flurbiprofen ester enantiomer prodrug compound, a preparation method thereof, a pharmaceutical composition and purposes, the compound is (R)-AF377 or (S)-AF377, is formed by covalently connecting a carboxyl of (R)-flurbiprofen, (S)-flurbiprofen and a phenolic hydroxyl of acetaminophen through an ester bond, corresponding chiral carbons are R configuration and S configuration respectively, and structures are shown in formula (I) and formula (II). The application further provides a preparation method of the compound, a pharmaceutical composition containing the compound and purposes of the compound in pain, inflammation or fever treatment. The compound has high optical purity, releases an active ingredient in the liver, (S)-AF377 has synergistic anti-inflammatory analgesic activity, (R)-AF377 has independent analgesic activity, can reduce side effects of single drug use, improves bioavailability, and provides a new drug selection for treatment of mild to moderate inflammatory pain.

This invention discloses a method for preparing and applying a dynamic pH / light-responsive bilayer programmable hydrogel, belonging to the field of hydrogel materials technology. The purpose of this invention is to address the problems of existing hydrogel materials, such as single crosslinking structure, irreversible crosslinking, difficulty in simultaneously achieving mechanical and responsive properties, single response mode, and insufficient programmable controllability. The method involves: 1. Preparing a borate ester crosslinked PVA-B-O-PVA hydrogel; 2. Preparing a pH / light-responsive bilayer hydrogel. This hydrogel can achieve swelling regulation through reversible breaking and recombination of borate ester bonds under varying acidic and alkaline conditions. Under light irradiation, it achieves photochromism and deformation response through the SP / MC structural transformation of spiropyran molecules. Furthermore, it achieves bending, folding, and programmable motion behavior through the synergistic effect of different functional layers in the bilayer structure. It can be applied to flexible actuators, programmable soft actuators, and environmental response sensors in complex environments.