49 results about "Vinylidene group" patented technology

The invention relates to a preparation method of a high-lithium-affinity vinylene covalent organic framework material serving as a lithium metal negative electrode interface protective layer. The method comprises the following steps: firstly, by utilizing a simple hydrothermal synthesis method, taking 1, 3, 5-trimethyl-2, 4, 6-triazine (TMT) and 2, 2-bipyridine-5, 5-diformaldehyde (BPY) as monomers, and carrying out Aldol condensation reaction to synthesize a covalent organic framework material connected by a vinylene bond, which is named as viCOF-bpy; the electrochemical performance of the material is verified by modifying the surface of a copper pole piece with the viCOF-bpy material and then assembling a battery. The lithium-loving group on the material skeleton can promote the migration of lithium ions, and the vinylidene has very strong chemical stability, so that the electrochemical performance of the lithium metal battery can be effectively improved.

The invention discloses a vinylidene bridged covalent organic framework material based on 2, 7-diaza pyrene and a preparation method thereof.The 2, 7-diaza pyrene is used as a core monomer, under the catalysis of benzoic acid and benzoic anhydride, methyl is activated to form an enamine intermediate, aryl aldehyde is attacked to form unsubstituted carbon-carbon double bonds, and under the heating condition, the 2, 7-diaza pyrene is synthesized into the vinylidene bridged covalent organic framework material based on 2, 7-diaza pyrene. And two vinylidene bridged COFs materials with high crystallinity are successfully synthesized. The COFs material disclosed by the invention has a high specific surface area, a uniform through rhombic pore channel structure and excellent chemical stability, and has an important application prospect in the field of photoelectrocatalysis.

Intragastric volume-occupying devices and methods for treating obesity are provided. The devices, which are inflated by carbon dioxide, include an aluminum or silicon oxide barrier layer providing carbon dioxide retention and an alkylene vinyl alcohol polymer layer providing structural integrity in vivo.

The present invention belongs to the field of medicine and relates to the use of benzothiazinone vinylidene indene compounds in the preparation of osteoclast differentiation inhibitors. The present invention uses tartrate-resistant acid phosphatase (TRAP) staining and reverse transcription real-time fluorescence quantitative polymerase chain reaction (RT-qPCR) technology to confirm for the first time that this series of compounds can significantly inhibit RANKL-induced osteoclast differentiation and the formation of multinucleated osteoclasts, and are non-cytotoxic at concentrations of 5μM and below. Based on these findings, the benzothiazinone vinylidene indene compounds provided by the present invention can be used as candidate drug molecules for novel osteoclast differentiation inhibitors, for the prevention and / or treatment of bone metabolic diseases caused by excessive activation of osteoclasts, such as osteoporosis, periprosthetic bone dissolution, tumor metastasis bone destruction, and rheumatoid arthritis.

The application discloses a kind of vinylidene acenaphthene double asymmetric alpha-diimine chemical intermediates and catalyst prepared from it, intermediate and the preparation method and application of catalyst. 2,4,6-tri-tert-butyl aniline is used as raw material, in the presence of catalyst, under the condition of 120 DEG C, the vinylidene acenaphthene double asymmetric alpha-diimine chemical intermediate with structure as shown in formula (I) is obtained.Compared with prior art, the application uses commercially available, low-cost and storage condition loose 2,4,6-tri-tert-butyl aniline instead of high-cost, storage harsh 2,4-di-tert-butyl aniline as reaction raw material, which effectively reduces the raw material procurement threshold and comprehensive production cost, and simplifies the storage condition.The raw material of the method is easy to obtain, low in cost, easy to operate, high in yield, and suitable for industrial scale-up production.

The present invention is directed at multibranched acid terminated oligomers of itaconic acid. Such multibranched acid terminated oligomers also contain six or more vinylidine groups providing unsaturations that can then be relied upon for subsequent Michael nucleophilic addition type reactions. The subject oligomers have particular use for treatment of damaged hair or skin.

Disclosed are to compositions to form foams, foams formed and method to form foams. Disclosed are foams comprised of a co-polymer of vinylidene substituted aromatic monomers and unsaturated compounds containing an acid that are reversibly ionically bonded through the use of a metal salt, metal oxide or combination thereof, wherein the metal has a valence of 2 or more, which contains graphite.

A compound of formula (I) wherein R1 is H or methyl, R2 and R3 are independently selected from H, C1-C4 alkyl, cycloalkyl and phenyl-C1- C4-alkyl, or R2 and R3, together with the carbon atom to which they are attached, form a C3-C6 carbocycle, R4 is H or C1-C4 alkyl, and A is C2-C7-alkylene is a suitable precursor for polyisocyanate-adducts and crosslinkers for obtaining isocyanate-free urethane-type polymers.

Described is a device for providing haptic stimuli to a body part of a user, the device comprising an actuating element configured to deform between a non-actuated state and an actuated state upon electrothermal activation, wherein the actuating element comprises a laminated structure including a flexible layer comprising liquid crystal elastomer (LCE); a conductive layer, electrically couplable to an electrothermal activator, and comprising an electrically conductive polymer; and an priming layer provided in between the flexible layer and the conductive layer and comprising an priming polymer, wherein the electrically conductive polymer derives from 3,4-ethylenedioxythiophene (EDOT) monomer units, while the priming polymer derives from vinyl or vinylidene monomer units. Also described is a method of manufacturing said device for providing haptic stimuli to a body part of a user.

A foaming composition useful to make an extruded foam is comprised of comprising a plurality of chains of a copolymer of one or more vinylidene aromatic monomers and one or more unsaturated acids, the copolymer having about 0.01 to about 15.0 percent by weight of the one or more unsaturated acids wherein the acid groups are pendant from the copolymer a metal salt, metal oxide or combination thereof, the metal having a valence of at least 2; and one or more blowing agents. The foaming composition may be made into a foam by heating the foaming composition to a temperature sufficient to melt and ionically crosslink said copolymer which is then extruded through a die forming a foam. The foam is comprised of an ionically crosslinked aforementioned copolymer, wherein the copolymer is crosslinked through ionic bonds between the unsaturated acids and the metal of the metal salt or metal oxide.

The present invention discloses the synthesis of D-A type organic small molecules with a fulvalene-like structure and their application in photocatalytic hydrogen evolution, belonging to the field of organic material technology. This type of organic small molecule photocatalyst has many advantages: 1) the photogenerated excitons of the D-A type structure are easily delocalized within the molecule, which is beneficial for the separation of electrons and holes; 2) the fulvalene-like structure does not contain unstable vinylidene protons, which is beneficial for improving the light and chemical stability of the material; 3) the molecular structure is simple, easy to synthesize, and low in cost; 4) compared with polymers, no palladium (Pd) catalyst is used in the synthesis process. The D-A type organic small molecule with a fulvalene-like structure of the present invention was successfully used in photocatalytic hydrogen production experiments and obtained good hydrogen production efficiency.

This invention discloses a phenyl-modified vinylacenaphthene nickel catalyst, its preparation method, and its applications. The catalyst has the structural formula shown in Formula (I), where X is chlorine or bromine. The catalyst has a simple preparation process and, when used as a co-catalyst for ethylene polymerization, exhibits results contrary to conventional experimental observations: larger substituents lead to lower molecular weight, better flowability, and dispersibility in the polymerized product, showing broad application prospects in the elastomer field. Furthermore, the catalyst also exhibits good thermal stability and polymerization activity, demonstrating promising industrial application potential. Formula (I)

The invention belongs to the field of medicines, and relates to application of a benzothiazinone vinylidene indene compound in preparation of an osteoclast differentiation inhibitor. Through tartrate-resistant acid phosphatase (TRAP) staining and reverse transcription real-time fluorescent quantitative polymerase chain reaction (RT-qPCR) technologies, it is proved for the first time that the series of compounds can significantly inhibit RANKL-induced osteoclast differentiation and polykaryotic osteoclast formation, and have no cytotoxicity at the concentration of 5 [mu] M or below. Based on the discoveries, the benzothiazinone vinylidene indene compound provided by the invention can be used as a candidate drug molecule of a novel osteoclast differentiation inhibitor, and is used for preventing and / or treating osteoporosis, periprosthetic osteolysis, tumor metastasis bone destruction, rheumatoid arthritis and other bone metabolism diseases caused by overactivity of osteoclasts.

Magnetic beads including a polymer and magnetic particles that have been modified with a silane coupling agent, wherein the polymer includes a structural unit derived from a monomer (a) having at least one type of group selected from the group consisting of a vinyl group, a vinylidene group, and a (meth)acryloyl group, and the silane coupling agent includes at least one type of group selected from the group consisting of a vinyl group, a vinylidene group, a (meth)acryloyl group, and a styryl group.

The invention relates to a graft polyarylether (‘PAE’) copolymer (P1), a process for preparing the graft PAE copolymer (P1) from a side-chain allyl / vinylene-functionalized PAE copolymer (P0) via free radical polymerisation with at least one betaine methacrylate or acrylate (B(m)A) vinyl monomer and optionally further with vinyl pyrrolidone (VP), and the use of the graft PAE copolymer (P1) in the preparation of an article, such as a membrane or a part thereof. The graft PAE copolymer (P1) comprises at least two types of recurring units, one of which having side-chain grafted poly(B(m)A) homopolymers or poly(B(m)A-VP) copolymers. The PAE copolymer (P0), from which the graft PAE polymer (P1) is prepared, may be an amorphous side-chain allyl / vinylene-functionalized polyaryletherketone or polyarylethersulfone copolymer.

To provide magnetic beads capable of suppressing variation in light scattering in light scattering measurement.SOLUTION: A magnetic bead includes a polymer and a magnetic particle modified with a silane coupling agent, wherein the polymer includes a structural unit derived from a monomer (a) having at least one selected from the group consisting of a vinyl group, a vinylidene group, and a (meth)acryloyl group, and the silane coupling agent includes at least one selected from the group consisting of a vinyl group, a vinylidene group, a (meth)acryloyl group, and a styryl group.SELECTED DRAWING: Figure 1

Disclosed are stabilized compositions based on polycarbonates using a buffer. Disclosed are stabilized compositions comprising 1) polycarbonates comprising virgin and / or recycled polycarbonate, 2) one or more recycled polycarbonates, one or more flame retardants, and / or one or more glass fibers and 3) a buffer system. Disclosed are stabilized compositions comprising polycarbonates comprising recycled and / or virgin polycarbonates, one or more flame retardants and / or one or more glass fibers, one or more vinylidene aromatic substituted polymers, and a buffer system. Disclosed are methods for preparing such compositions. Disclosed are articles prepared from such compositions.

In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, the disclosure, in one aspect, relates to uncured compositions that include an elastomer, a curing agent, a co-curative, and a diluent, where the diluent comprises a highly reactive polyisobutene with at least about 60 mol % of terminal vinylidene groups. In certain aspect, the diluent can include a second diluent comprising a second polyisobutene comprising at most about 20 mol % terminal vinylidene groups, a hydrocarbon oil, or a combination thereof. Also disclosed are vulcanized rubber compositions including the uncured compositions that have been vulcanized and articles, including tires and / or components of tires, comprising the vulcanized rubber compositions.

The present invention discloses a kind of efficient green and universal melt synthesis method of covalent organic framework, comprising the steps of: making organic monomer 1, organic monomer 2 and auxiliary agent melt polymerization reaction, and the product is activated to obtain a covalent organic framework; the auxiliary agent is containing amides, phosphoramides, acylhydrazones, hydrazides or phosphoramidites for synthesizing stable imines, hydrazones, acylhydrazones, polyimides, vinyls, vinylides, ketone-enols or pyrazines COFs with good applicability. The method is characterized by good applicability and process greening, and can achieve solvent-free, cyclic auxiliary agents, simple process, and simple equipment of multiple types of COFs. Batch synthesis has high specific surface area and higher crystallinity COFs. At the same time, the method breaks through the harsh conditions required for the solvent thermal synthesis common to traditional COFs and does not use harmful organic solvents, and is suitable for large-scale batch preparation of high-quality COFs materials.

The present invention relates to a process for preparing a polymer containing ethylene units and bearing at the end of the chain a 1-arylethenyl group, which process comprises the polymerization of a monomer selected from ethylene and a monomer mixture containing ethylene and a 1,3-diene in the presence of a catalytic system and a 1-methyl-1-arylethene, the catalytic system being based on a neodymocene borohydride and an organomagnesium compound.

Disclosed are ionomers of co-polymers of vinylidene substituted aromatic monomers and unsaturated compounds containing acid groups crosslinked by the residue of one or more metal salts and / or metal oxides of a metal having a valence of 2 or greater. The crosslinks are reversible and the weight average molecular weight of the copolymer of one or more vinylidene aromatic monomers and one or more unsaturated acids may be substantially the same after the crosslinking is reversed as it is before crosslinking. A portion of the chains of the copolymer of one or more vinylidene aromatic monomers and one or more unsaturated acids are crosslinked with other chains of the copolymer of one or more vinylidene aromatic monomers and one or more unsaturated acids. Disclosed are methods of preparing such ionomers.

The application discloses an unsymmetrical (alpha-diimine) nickel olefin catalyst based on a vinylidene acen as a skeleton, and a preparation method and application thereof. The structural formula of the catalyst is shown as formula (I), wherein X is chlorine or bromine. The catalyst has simple preparation process, and shows a result opposite to general rules when catalyzing ethylene polymerization, that is, a larger substituent group leads to a polymerization product with higher crystallinity. In addition, the catalyst also shows good thermal stability and polymerization activity, and has good industrial application prospect.

The application provides a quinoline pyridine nickel pre-catalyst and a preparation method and application thereof. The nickel pre-catalyst is 8-(2,6-di(aryl)-3,4,5-trifluorophenyl) imino-5,6,7-trihydroquinoline pyridine. Under the protection of inert gas, a ligand L is prepared by using 5,6,7-trihydroquinoline-8-ketone and synthetic aniline A, and the ligand L is reacted with (DME)NiBr2 to prepare a series of nickel pre-catalysts Ni R ; the nickel pre-catalyst is activated by methylaluminoxane (MAO) and used for ethylene polymerization catalytic performance experiment, the nickel pre-catalyst shows high catalytic activity (3.1×10 6 g mol ‑1 h ‑1 ), and produces controllable polyethylene with chain walking (branching degree = 58-90 / 1000C), chain transfer (polymer M w = 0.7-2.8 kg mol ‑1 ) and chain termination reaction (vinylidene / ethylene = 83.4-93.6%) and the like. It is worth noting that the beta-elimination reaction is the main chain termination mode in the system, so that the obtained polyethylene can change from polyethylene wax to viscous oil with the change of polymerization temperature, and further produce polyethylene with a higher internal double bond ratio.

Polymorph forms of 4-trifluoromethyl-N-(3,3a,4,4a,5,5a,6,6a-octahydro-1,3-dioxo-4,6-ethenocycloprop[f]isoindol-2 (1H)-yl)-benzamide are disclosed as well as their methods of synthesis and pharmaceutical compositions.

The invention belongs to the technical field of organic synthesis, and particularly relates to a 2, 3-dihydro-1H-pyrrole and polysubstituted pyrrole compound and a preparation method thereof. According to the invention, N-(4-vinylidenetetrahydrofuran-2-yl) amide is used as a reaction raw material, and 2, 3-dihydro-1H-pyrrole and polysubstituted pyrrole compounds can be prepared at normal temperature and normal pressure through a gold catalysis skeleton editing strategy. The preparation method provided by the invention has the advantages of simple operation, easy preparation of raw materials, mild reaction conditions, wide substrate range and easy industrial production. The 2, 3-dihydro-1H-pyrrole and polysubstituted pyrrole compound prepared according to the method provides a new thought for heterocyclic ring synthesis in organic synthesis and pharmaceutical chemistry, and has good industrial conversion prospects and economic benefits.

Provided is a galvanized steel sheet including: a steel sheet comprising a galvanized layer; and a surface coating layer formed on the galvanized layer by using a composition which comprises a trivalent chromium compound, a carboxylated vinylidene copolymer, and a crosslinking agent. The galvanized layer includes Mg.

The present invention relates to a method for preparing cyclic carbonates having an exocyclic vinylidene group by reacting propargyl alcohol with CO2 in the presence of a silver catalyst having at least one bulky ligand and a lipophilic carboxylate ligand, wherein after the reaction is complete, the catalyst is separated from the cyclic carbonate by using two organic solvents with different polarities having a solubility gap, and the silver catalyst is enriched in the less polar solvent and the cyclic carbonate is enriched in the more polar solvent.

A fuel composition comprising: (a) a gasoline-based fuel suitable for use in a spark-ignition internal combustion engine; and (b) a polybutene polymer, wherein the polybutene polymer has a molecular weight in the range of 200 to 10,000 g / mol, more than 30% of the polymer molecules in the polybutene polymer have terminal vinylidene groups, and the polybutene polymer is present at a level of 500 to 5000 weight ppm in the fuel composition. The fuel composition of the present invention provides improved engine power and reduced combustion duration.

The present invention is directed at multibranched acid terminated oligomers of itaconic acid. Such multibranched acid terminated oligomers also contain six or more vinylidine groups providing unsaturations that can then be relied upon for subsequent Michael nucleophilic addition type reactions. The subject oligomers have particular use for treatment of damaged hair or skin.

A fiber-treating agent which improves the water resistance and the heat resistance, imparts heat shape memory ability, and also improves the stretchability and the feel of the surface of a fiber. The fiber-treating agent is a one-part type fiber-treating agent formed of a single composition or a multiple-part type fiber-treating agent formed of a plurality of compositions and comprises the following components (A) to (C) in a total composition: (A): an aromatic compound having one or more vinyl groups or vinylidene groups, and a coordinating functional group; (B): a radical initiator; and (C): water.