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325 results about "Carbon–carbon bond" patented technology
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A carbon–carbon bond is a covalent bond between two carbon atoms. The most common form is the single bond: a bond composed of two electrons, one from each of the two atoms. The carbon–carbon single bond is a sigma bond and is formed between one hybridized orbital from each of the carbon atoms. In ethane, the orbitals are sp³-hybridized orbitals, but single bonds formed between carbon atoms with other hybridizations do occur (e.g. sp² to sp²). In fact, the carbon atoms in the single bond need not be of the same hybridization. Carbon atoms can also form double bonds in compounds called alkenes or triple bonds in compounds called alkynes. A double bond is formed with an sp²-hybridized orbital and a p-orbital that is not involved in the hybridization. A triple bond is formed with an sp-hybridized orbital and two p-orbitals from each atom. The use of the p-orbitals forms a pi bond.
Nanoporous silicone resins having low dielectric constants
InactiveUS6541107B1Group 4/14 element organic compoundsDead plant preservationOrganic solventCarbon–carbon bond
Nanoporous silicone resins and silicone resin films having low dielectric constants and a method for preparing such nanoporous silicone resins. The silicone resin comprises the reaction product of a mixture comprising(A) 15-70 mol % of a tetraalkoxysilane described by formula where each R1 is an independently selected alkyl group comprising 1 to about 6 carbon atoms,(B) 12 to 60 mol % of a hydrosilane described by formula where each X is an independently selected hydrolyzable substituent,(C) 15 to 70 mole percent of an organotrialkoxysilane described by formula where R2 is a hydrocarbon group comprising about 8 to 24 carbon atoms or a substituted hydrocarbon group comprising a hydrocarbon chain having about 8 to 24 carbon atoms and each R3 is an independently selected alkyl group comprising 1 to about 6 carbon atoms; in the presence of(D) water,(E) hydrolysis catalyst, and(F) organic solvent for the reaction product.The silicone resin is cured and heated in an inert atmosphere at a temperature sufficient to effect thermolysis of carbon-carbon bonds of the R2 groups thereby forming a nanoporous silicone resin.
Owner:DOW CORNING CORP
Stabilized compounds having secondary structure motifs
InactiveUS7192713B1Peptide-nucleic acidsGroup 8/9/10/18 element organic compoundsCrystallographyCarbon–carbon bond
The present invention provides novel stabilized crosslinked compounds having secondary structure motifs, libraries of these novel compounds, and methods for the synthesis of these compounds libraries thereof. The synthesis of these novel stabilized compounds involves (1) synthesizing a peptide from a selected number of natural or non-natural amino acids, wherein said peptide comprises at least two moieties capable of undergoing reaction to promote carbon-carbon bond formation; and (2) contacting said peptide with a reagent to generate at least one crosslinker and to effect stabilization of a secondary structure motif. The present invention, in a preferred embodiment, provides stabilized p53 donor helical peptides. Additionally, the present invention provides methods for disrupting the p53 / MDM2 binding interaction comprising (1) providing a crosslinked stabilized α-helical structure; and (2) contacting said crosslinked stabilized α-helical structure with MDM2.
Owner:PRESIDENT & FELLOWS OF HARVARD COLLEGE
Ligands for metals and improved metal-catalyzed processes based thereon
InactiveUS7223879B2More featureEasy to useCarboxylic acid nitrile preparationCarboxylic acid esters preparationCarbon–carbon bondHeteroatom
One aspect of the present invention relates to ligands for transition metals. A second aspect of the present invention relates to the use of catalysts comprising these ligands in transition metal-catalyzed carbon-heteroatom and carbon-carbon bond-forming reactions. The subject methods provide improvements in many features of the transition metal-catalyzed reactions, including the range of suitable substrates, reaction conditions, and efficiency.
Owner:MASSACHUSETTS INST OF TECH
Ligands for metals and improved metal-catalyzed processes based thereon
InactiveUS6946560B2More featureEasy to useCarboxylic acid nitrile preparationGroup 5/15 element organic compoundsCarbon–carbon bondHeteroatom
One aspect of the present invention relates to novel ligands for transition metals. A second aspect of the present invention relates to the use of catalysts comprising these ligands in transition metal-catalyzed carbon-heteroatom and carbon-carbon bond-forming reactions. The subject methods provide improvements in many features of the transition metal-catalyzed reactions, including the range of suitable substrates, reaction conditions, and efficiency.
Owner:MASSACHUSETTS INST OF TECH
Nanoporous silicone resins having low dielectric constants and method for preparation
InactiveUS6313045B1NanotechSemiconductor/solid-state device manufacturingOrganic solventCarbon–carbon bond
Owner:DOW CORNING CORP
Post-coupling synthetic approach for polymeric antioxidants
A method of preparing an antioxidant polymer includes forming or obtaining a first polymer having reactive pendant groups, where the first polymer does not include cyclic anhydride repeat units, and derivatizing the first polymer with an antioxidant. Another method of preparing an antioxidant polymer includes forming or obtaining a first polymer having reactive pendant groups and derivatizing the first polymer with an antioxidant, where the antioxidant is attached to the first polymer by an acetal, amide, amine, carbamate, carbonate, ester, ether or thioether linkage or by a carbon-carbon bond. The invention is also directed to polymers that are generally prepared by these methods, compositions that include such polymers and methods of using such polymers.
Owner:UNIVERSITY OF MASSACHUSETTS LOWELL
System for improving crude oil
InactiveUS20060231462A1Increase heightEnhancing crude oilThermal non-catalytic crackingSemi-permeable membranesAPI gravityFiltration
Crude oil can be refined through a filtration media. Cavitation bubbles having localized areas of very high temperatures and pressures may be created thereby causing several physical and chemical phenomena, including thermal cracking of carbon-carbon bonds as the crude moves through the flux cartridge membrane. Heavy hydrocarbons are residues are thereby cracked into smaller lowering boiling molecules having a higher API gravity. Once the relatively smaller hydrocarbons pass through the flux cartridge membrane into the flux cartridge, the effluent can be routed to a second separator annulus. It should also be pointed out that lighter hydrocarbons formed can volatilize and special provisions may be needed to efficiently capture these gases.
Owner:LJC TECH
Copper-catalyzed formation of carbon-heteroatom and carbon-carbon bonds
InactiveUS6867298B2Cheap and practicalLow costUrea derivatives preparationCarbamic acid derivatives preparationCarbon–oxygen bondHydrazine compound
The present invention relates to copper-catalyzed carbon-heteroatom and carbon-carbon bond-forming methods. In certain embodiments, the present invention relates to copper-catalyzed methods of forming a carbon-nitrogen bond between the nitrogen atom of an amide or amine moiety and the activated carbon of an aryl, heteroaryl, or vinyl halide or sulfonate. In additional embodiments, the present invention relates to copper-catalyzed methods of forming a carbon-nitrogen bond between a nitrogen atom of an acyl hydrazine and the activated carbon of an aryl, heteroaryl, or vinyl halide or sulfonate. In other embodiments, the present invention relates to copper-catalyzed methods of forming a carbon-nitrogen bond between the nitrogen atom of a nitrogen-containing heteroaromatic, e.g., indole, pyrazole, and indazole, and the activated carbon of an aryl, heteroaryl, or vinyl halide or sulfonate. In certain embodiments, the present invention relates to copper-catalyzed methods of forming a carbon-oxygen bond between the oxygen atom of an alcohol and the activated carbon of an aryl, heteroaryl, or vinyl halide or sulfonate. The present invention also relates to copper-catalyzed methods of forming a carbon-carbon bond between a reactant comprising a nucleophilic carbon atom, e.g., an enolate or malonate anion, and the activated carbon of an aryl, heteroaryl, or vinyl halide or sulfonate. Importantly, all the methods of the present invention are relatively inexpensive to practice due to the low cost of the copper comprised by the catalysts.
Owner:MASSACHUSETTS INST OF TECH
5-HT1a receptor subtype agonist
The present invention relates to a method of treating a patient suffering from a disorder of the central nervous system associated with 5-HT1A receptor subtype, comprising as an active ingredient a carbostyril derivative or a salt thereof represented by the formula (1): wherein the carbon-carbon bond between 3- and 4-positions in the carbostyril skeleton is a single or a double bond.
Owner:OTSUKA PHARM CO LTD
Fuel products from plant or animal lipids
A novel method for producing fuel products from plant or animal lipids is provided. The carbon-carbon bonds in the molecules of plant or animal lipids are cracked into the molecules with smaller molecular weights. The mixed fuel is formed after chemical treatments. Then the mixed fuel (biopetroleum) is processed by a distillation process to produce fuel products according to their boiling points. The method is particularly advantageous to produce the energy source from agricultural products, which provides a solution for energy crisis with a significant potential.
Owner:LEE JOHN H
Ruthenium metathesis catalyst and method for producing olefin reaction product by metathesis reaction using the same
InactiveUS6175047B1Easy to prepareHigh catalytic activityOrganic-compounds/hydrides/coordination-complexes catalystsCatalystsCarbon–carbon bondReducing agent
The invention has an object of safely and simply preparing a large amount of a ruthenium metathesis catalyst, which is used as a catalyst for a carbon-carbon bond formation using, particularly, a metathesis reaction. The metathesis catalyst has the following complex composition (A) or (B). The composition (A) includes RuX12(arene)(PR1R2R3) and R4CHX22, R5C=CH or R4CHX2 and a reducing agent, wherein X1 and X2 respectively are a halogen atom; arene is a hydrocarbon having a benzene ring; R1, R2 and R3, which may be the same or different, respectively are an alkyl group having 1-8 carbon atoms, a cycloalkyl group having 3-8 carbon atoms or an optionally substituted aryl group, wherein the substituent group is an alkyl group having 1-8 carbon atoms, an alkoxy group having 1-8 carbon atoms, an alkylamino group having 1-8 carbon atoms or a halogen atom; R4 is an alkyl group which has 1-8 carbon atoms and may have an ether bond or an ester bond, an optionally subsituted aryl group, wherein the substituent group is a halogen atom or a hydroxyl group; or cycloalkyl group having 3-8 carbon atoms; and R5 is an optionally substituted alkyl group which has 1-8 carbon atoms and may have an ether bond or an ester bond, wherein the substituent group is a halogen atom or a hydroxyl group, an aryl group or a cycloalkyl group having 3-8 carbon atoms. The composition B includes [RuX12(arene)]2, PR1R2R3, R5C=CH or R4CHX2 and a reducing agent, wherein X1, arene, R1, R2, R3, R4 and R5 are the same as defined above.
Owner:TAKASAGO INTERNATIONAL CORPORATION
Skin lightening agents, compositions and methods
InactiveUS6852310B2Effective skin lightening propertyLess irritatingCosmetic preparationsHair cosmeticsHydrogen atomAlkoxy group
Cosmetic methods of skin lightening using coumarin derivatives of formula I as skin lightening agents alone or in combination with other skin benefit agents and together with a cosmetic vehicle: Where each or both R1 and / or R2 represents hydrogen; linear or branched C1-C18 alkyl, alkenyl, cycloalkyl, cycloalkenyl, hydroxyalkyl, hydroxyalkenyl, acyl, cycloacyl, or alkoxy groups;Each or both R3 and / or R4, which may be connected by a single or double carbon-carbon bond (shown as a dotted line), represents hydrogen; linear or branched C1-C18 alkyl, alkenyl, alkoxy, cycloalkyl, or cycloalkenyl group; andEach or both R5 and / or R6 represents a hydrogen atom, OH, C1-C4 acyl group, C1-C4 alkyl group, O—CO—R7, O—COO—R8 group, mesyl group or tosyl group, where each or both R7 and / or R8 represents hydrogen; linear or branched C1-C18 alkyl, alkenyl, hydroxyalkyl, hydroxyalkenyl, acyl, cycloacyl, or alkoxy groups.
Owner:UNILEVER HOME & PERSONAL CARE USA DIV OF CONOPCO IN C
Cellulose interpolymers and method of oxidation
ActiveUS7879994B2Decreasing and preventing frequencyPowder deliverySugar derivativesCarbon–carbon bondAcid value
This invention provides cellulose ester interpolymers, and methods of oxidizing cellulose interpolymers and cellulose ester interpolymers. The invention also provides routes to access carboxylated cellulose ester derivatives with high acid numbers wherein the carboxyl group is attached directly to the cellulose backbone by a carbon-carbon bond. Through functionalization of an intermediate aldehyde, the corresponding cationic or zwitterionic cellulose ester derivatives can also be accessed. The interpolymers of the present invention have a number of end-use applications, for example, as binder resins in various types of coating compositions and as drug delivery agents.
Owner:EASTMAN CHEM CO
Backlight unit and liquid crystal display including the same
A backlight unit for a liquid crystal display device, the backlight unit including: an light emitting diode (“LED”) light source; a light conversion layer disposed separate from the LED light source to convert light emitted from the LED light source to white light and to provide the white light to the liquid crystal panel; and a light guide panel disposed between the LED light source and the light conversion layer, wherein the light conversion layer includes a semiconductor nanocrystal and a polymer matrix, and wherein the polymer matrix includes a first polymerized polymer of a first monomer including at least two thiol (—SH) groups, each located at a terminal end of the first monomer, and a second monomer including at least two unsaturated carbon-carbon bonds, each located at a terminal end of the second monomer.
Owner:SAMSUNG ELECTRONICS CO LTD
Copper-catalyzed formation of carbon-heteroatom and carbon-carbon bonds
InactiveUS6888032B2Cheap and practicalLow costOrganic compound preparationThiol preparationCarbon–carbon bondSulfide
One aspect of the present invention relates to copper-catalyzed carbon-heteroatom and carbon-carbon bond-forming methods. In certain embodiments, the present invention relates to copper-catalyzed methods of forming a carbon-sulfur bond between the sulfur atom of a thiol moiety and the activated carbon of an aryl, heteroaryl, or vinyl halide or sulfonate. In other embodiments, the present invention relates to copper(II)-catalyzed methods of forming a carbon-nitrogen bond between the nitrogen atom of an amide and the activated carbon of an aryl, heteroaryl, or vinyl halide or sulfonate. In certain embodiments, the present invention relates to copper-catalyzed methods of forming a carbon-carbon bond between the carbon atom of cyanide ion and the activated carbon of an aryl, heteroaryl, or vinyl halide or sulfonate. In another embodiment, the present invention relates to a copper-catalyzed method of transforming an aryl, heteroaryl, or vinyl chloride or bromide into the corresponding aryl, heteroaryl, or vinyl iodide. Yet another embodient of the present invention relates to a tandem method, which may be practiced in a single reaction vessel, wherein the first step of the method involves the copper-catalyzed formation of an aryl, heteroaryl, or vinyl iodide from the corresponding aryl, heteroaryl, or vinyl chloride or bromide; and the second step of the method involves the copper-catalyzed formation of an aryl, heteroaryl, or vinyl nitrile, amide or sulfide from the aryl, heteroaryl, or vinyl iodide formed in the first step.
Owner:MASSACHUSETTS INST OF TECH
Methods to obtain low k dielectric barrier with superior etch resistivity
InactiveUS20090093132A1Increase resistanceLow dielectric constantSolid-state devicesSemiconductor/solid-state device manufacturingCarbon–carbon bondLow density
The present invention generally provides a method for forming a dielectric barrier with lowered dielectric constant, improved etching resistivity and good barrier property. One embodiment provides a method for processing a semiconductor substrate comprising flowing a precursor to a processing chamber, wherein the precursor comprises silicon-carbon bonds and carbon-carbon bonds, and generating a low density plasma of the precursor in the processing chamber to form a dielectric barrier film having carbon-carbon bonds on the semiconductor substrate, wherein the at least a portion of carbon-carbon bonds in the precursor is preserved in the low density plasma and incorporated in the dielectric barrier film.
Owner:APPLIED MATERIALS INC
Method of making heat treatable coated article with carbon inclusive protective layer
InactiveUS20060166009A1Reducing and minimizing corrosionNot readily susceptible to fogging upFouling preventionVehicle cleaningDlc coatingHigh density
A soda inclusive glass substrate is coated with a highly tetrahedral amorphous carbon inclusive layer that is a form of diamond-like carbon (DLC). In certain embodiments, the amorphous carbon layer includes at least about 35% sp3 carbon-carbon bonds, more preferably at least about 70%, and most preferably at least about 80% of the sp3 carbon-carbon bonds. The high density (e.g. greater than or equal to about 2.4 gm / cm3) of the amorphous carbon layer prevents soda from exiting the glass and reacting with water at surface(s) of the glass, thereby minimizing visible stains (or corrosion) on the glass. The high density amorphous carbon layer also may repel water. In some embodiments, the highly tetrahedral amorphous carbon layer is part of a larger DLC coating, while in other embodiments the highly tetrahedral layer forms the entirety of a DLC coating on the substrate.
Owner:GUARDIAN GLASS LLC
Reinforced filament with doubly-embedded nanotubes and method of manufacture
ActiveUS20090286079A1High mechanical strengthMaterial nanotechnologyLayered productsFiberCarbon fibers
Strengthened filaments and fibers are realized by mixing and dissolving monomer and catalyst in a solvent into open-ended nanotubes to form a polymer precursor prior to polymerization in which the open nanotubes are filled with monomer and catalyst. The remaining steps for forming a stabilized filament may follow the conventional sequence. The result is that the nanotubes are “doubly-embedded” in the polymer matrix (bonds to the polymer inside and extending through the nanotube and bonds to other polymer chains outside the nanotube) in the filament. These additional bonds provide additional mechanical strength. The number of bonds may be further enhanced by pretreating the nanotubes to create defects in the nanotubes to form sites along the inner and outer walls for additional polymer-to-nanotube bonds. The aligned filaments may be radiated to create additional polymer-to-nanotube bonds such as between the polymer chain inside the nanotube and the inner walls of the nanotube and to create nanotube-to-nanotube bonds. In the case of carbon fiber, the carbonized filament may be radiated to create additional carbon-carbon bonds prior to twisting the filaments into the fiber.
Owner:RAYTHEON CO
Heteroarylic-arylic diphosphines as chiral ligands
InactiveUS6153758ACarboxylic acid esters preparationNickel organic compoundsCarbon–carbon bondDiphosphines
PCT No. PCT / EP97 / 06358 Sec. 371 Date Apr. 18, 1999 Sec. 102(e) Date Apr. 18, 1999 PCT Filed Nov. 14, 1997 PCT Pub. No. WO98 / 22484 PCT Pub. Date May 28, 1998Diphosphines of a mixed heteroarylic-arylic type, wherein the phosphine group carrying backbone is constituted by the interconnection of a five-atom heteroaromatic ring and a carbocyclic aromatic ring, forming an atropoisomeric chiral system with a C1 symmetry. Said chiral diphosphines are advantageously used as ligands for the formation of chiral complexes with transition metals, in particular Ru, Rh, Pd, Ir, Ni. The so-obtained chiral complexes are used as chiral complexes are used as chiral catalysts for stereocontrolled reactions, in particular diastereo and enantioselective reduction reactions, hydroformylation reactions, hydrosilylation reactions, hydrocyanation reactions, double-bond isomerisation reactions, other reactions of carbon-carbon bond formation.
Owner:CHEMI SPA
Ruthenium metathesis catalyst and method for producing olefin reaction product by metathesis reaction using the same
InactiveUS6313365B1Easy to prepareHigh catalytic activityOrganic-compounds/hydrides/coordination-complexes catalystsCatalystsCarbon–carbon bondReducing agent
Owner:TAKASAGO INTERNATIONAL CORPORATION
Metal chalcogenide aqueous precursors and processes to form metal chalcogenide films
InactiveUS20110206599A1Selenium/tellurium compundsPhosphorus sulfur/selenium/tellurium compoundsSimple Organic CompoundsFormate
Metal chalocogenide precursor solutions are described that comprise an aqueous solvent, dissolved metal formate salts and a chalcogenide source composition. The chalcogenide source compositions can be organic compounds lacking a carbon-carbon bond. The precursors are designed to form a desired metal chalcogenide upon thermal processing into films with very low levels of contamination. Potentially contaminating elements in the precursors form gaseous or vapor by-products that escape from the vicinity of the product metal chalcogenide films.
Owner:INPRIA CORP
Composition for promoting adhesion between rubber and textiles
InactiveUS6046262ALimited shelf lifeStable aqueous dispersion/solutionAdhesive processesImpression capsSilane compoundsPolyester
A composition for the promotion of adhesion between a rubber formulation and a textile substrate is provided. The inventive composition comprises either a mixture of specific amine functional silanes and organo-functional silanes having reactive groups or groups with an affinity for rubber. The inventive method entails the use of the inventive composition or a silane compound having both an amine moiety and a reactive group having an affinity for rubber formulations, particularly an unsaturated carbon-carbon bond. The composition may be utilized to adhere any standard reinforcement-type textile, such as polyester or polyamide, to a standard rubber composition, such as SBR, NBR, or EPDM. A method for adhering textiles to rubber formulations is also provided involving a pre-dip, -spray, -coat, and the like, of the inventive composition on a reinforcement-type textile surface followed by the contacting of the rubber formulation. Optionally, and preferably, the process involves the extra utilization of resorcinol-formaldehyde latex as an effective bonding agent to improve the adhesion between the two layers. The resulting textile-reinforced rubber product may be utilized as an automobile fan or timing belt, an automobile tire component, and any other rubber article which requires long-lasting, durable textile reinforcement.
Owner:MILLIKEN & CO
Mango aglycone, preparation purification process and uses thereof
InactiveCN101367787AGood reproducibilityHigh yieldOrganic active ingredientsOrganic chemistryPurification methodsCarbon–carbon bond
The present invention belongs to the technical field of biological pharmacy, and in particular relates to a preparation and purification method of tetra-hydroxyl xanthone mango aglycone (norathyriol), and an application thereof in hypoglycemic medicine. Based on biological experiments, mango glycoside is used as raw material; under the condition with phenol and hydroiodic acid, carbon-carbon bonds are broken to produce the crude product of mango aglycone; the crude product is separated and purified through silica gel column chromatography so that the mango aglycone is separated; the yield rate reaches 12 percent, the purity is higher than 95 percent, and the reproduction performance is good; the IGTT of C57BL / 6 normal mice is effectively improved with the norathyriol; and simultaneously the quantity of insulin secretion induced by glucose in vivo for the C57BL / 6 normal mice can be improved with the norathyriol. Therefore, the mango aglycone can be applied for preparation of hypoglycemic medicine.
Owner:NANJING UNIV
Carbon fiber bundle process for producing the same and thermoplastic resin composition and molded article thereof
A carbon fiber bundle is provided which can develop satisfactory interfacial adhesion to polyolefin-based resins, especially polypropylene resins. The carbon fiber bundle comprises a plurality of single fibers that was sized with a sizing agent comprising: a polymer having a main chain formed of carbon-carbon bonds, containing an acid group in at least part of side chains or at least a part of main chain ends, and representing an acid value of 23 to 120 mgKOH / g as measured in accordance with ASTM D1386; or a polymer having a main chain formed of carbon-carbon bonds and containing at least either of an epoxy group and an ester group in at least a part of side chains or at least a part of main chain ends.
Owner:MITSUBISHI RAYON CO LTD
Rubber compositions containing non-sulfur silica coupling agents bound to diene rubbers
ActiveUS20100132868A1Improve suppression propertiesReduced filler flocculationPigmenting treatmentPneumatic tyre reinforcementsElastomerDynamic viscoelasticity
The invention provides vulcanizable rubber compound having improved tensile mechanical and dynamic viscoelastic properties. The compounds are formed by mixing an elastomer, containing unsaturated carbon-carbon bonds in its molecular structure, with a reinforcing inorganic filler silica in the presence of an alkyl alkoxysilane and a non-sulfur coupling agent that binds to the rubber backbone with an “ene” linkage or a 1,3 dipolar addition linkage. In particular, the coupling agent and the alkyl alkoxysilane are present in the compound in a weight ratio of about 0.0001:1 to about 1:1.
Owner:BRIDGESTONE CORP
Copper-catalyzed c-h bond arylation
ActiveUS20090076266A1Carboxylic acid nitrile preparationOrganic compound preparationHydrogenOrganic synthesis
The present invention is a one-step method for efficiently converting carbon-hydrogen bonds into carbon-carbon bonds using a combination of aryl halides, a substrate, and a copper salt as catalyst. This method allows faster introduction of complex molecular entities, a process that would otherwise require many more steps. This invention is particularly relevant for the organic synthesis of complex molecules such as, but not limited to, pharmacophores and explosives.
Owner:UNIV HOUSTON SYST
Active energy ray curable liquid composition and liquid cartridge
InactiveUS8124791B2Excellent curabilityImprove solubilityOrganic chemistryInksHydrogen atomCarbon–carbon bond
The invention provides an active energy ray curable liquid composition containing a compound represented by a general formula (I):wherein A is a hydrogen atom or a monovalent organic residue which may be substituted, R1 and R2 are, independently of each other, a divalent organic group which may be substituted, E is an amide bond, Rn is a cyclic linking group having a carbonyl group and an unsaturated carbon-carbon bond adjacent to the carbon atom of the carbonyl group, m is a number of 0 or greater, n is a number of 2 or greater, m+n is 3, and Z is a secondary or tertiary amino bond structure, with the proviso that the amino bond may be a salt of a secondary or tertiary amine, and a liquid cartridge.
Owner:CANON KK
Carbon fiber bundle, process for producing the same, and thermoplastic resin composition and molded article thereof
A carbon fiber bundle is provided which can develop satisfactory interfacial adhesion to polyolefin-based resins, especially polypropylene resins. The carbon fiber bundle comprises a plurality of single fibers that was sized with a sizing agent comprising: a polymer having a main chain formed of carbon-carbon bonds, containing an acid group in at least part of side chains or at least a part of main chain ends, and representing an acid value of 23 to 120 mgKOH / g as measured in accordance with ASTM D1386; or a polymer having a main chain formed of carbon-carbon bonds and containing at least either of an epoxy group and an ester group in at least a part of side chains or at least a part of main chain ends.
Owner:MITSUBISHI CHEM CORP
Method for preparing hemostatic cotton through hyaluronic acid crosslinked gelatin
ActiveCN105400214AGood biocompatibilityImprove mechanical propertiesSurgical adhesivesPharmaceutical delivery mechanismCross-linkCarbon–carbon bond
The invention discloses a method for preparing hemostatic cotton through hyaluronic acid crosslinked gelatin and belongs to the field of biomedical materials. The method includes the steps that firstly, a novel hydroformylation hyaluronic acid crosslinking agent is prepared; then, the hydroformylation hyaluronic acid crosslinking agent is mixed with gelatin for foaming, refrigerating and drying are conducted, and the gelatin hemostatic cotton can be obtained after sterilization. According to the method, strong oxidant sodium periodate is utilized to oxidize a carbon-carbon bond of cis diol in the hyaluronic acid so that the hyaluronic acid can react with amidogen for formylation; the hyaluronic acid obtained after formylation serves as a macromolecular crosslinking agent and reacts with the gelatin containing an amino functional group, and the gelatin is made to form a cross-linked structure, so that mechanical performance is enhanced, and the sponge function is given to the gelatin. The gelatin is good in biocompatibility, has the hemostatic and anti-microbial functions and serves as a sponge base material, the hydroformylation hyaluronic acid serves as the crosslinking agent, the prepared hemostatic cotton is good in mechanical performance, safe and non-toxic, the hemostatic property is remarkably improved, a good pain relieving function is achieved, and the effect of promoting healing of injured tissues is achieved.
Owner:稳得希林(沈阳)生物科技有限公司
Carbon nanotube structure
A carbon nanotube structure includes a number of carbon wires and a number of second carbon nanotubes. Each of the carbon nanotube wires includes a number of first carbon nanotubes joined end to end by the carbon-carbon bonds therebetween. The carbon wires and the carbon nanotubes are joined by van der Waals attractive force therebetween.
Owner:TSINGHUA UNIV +1
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