54 results about "Biphenylol" patented technology

A polyethersulfone composition is disclosed which comprises structural units derived from a monomer mixture comprising fluorenylidene bisphenol-A and at least 50 mole percent of 4,4′-biphenol based on total moles of diphenolic monomers, wherein the polyethersulfone has a minimum glass transition temperature of 235° C. and a notched Izod impact value of 1 ft-lb/in. as measured by ASTM D256.

The invention belongs to the technical field of medicines and mainly relates to application of 2-phenylphenol and derivatives thereof to a medicine for treating epilepsia. The structural formula of the 2-phenylphenol derivatives is shown in the specification of the invetion, wherein R1 and R2 can be hydroxide groups, sulfhydryl groups at the same time or one is hydroxide radical and the other is sulfhydryl group; and R1 and R2 can be alkyls of C1-C6, alkenyls of C2-C6, alkyls and aryls of C2-C6 or acyls or alkenyls of C2-C6 and at least one of R1 and R2 is hydroxide group.

The invention relates to a novel fluorescence-enhanced probe compound preparation method and a trivalent chromium ion detection method. The chromium ion fluorescence-enhanced probe compound has a structure shown in the formula I. The preparation method comprises mixing 4'-Hydroxy-4-biphenylcarbonitrile, anhydrous magnesium chloride and anhydrous triethylamine in an acetonitrile solvent in a nitrogen protective atmosphere, adding paraformaldehyde into the mixture, carrying out reflux to obtain an intermediate product, carrying out reflux on the intermediate product, 2-chloropyridine hydrochloride, anhydrous potassium carbonate and potassium iodide in an acetonitrile solvent to obtain a second intermediate product, mixing the second intermediate product, phenanthraquinone and ammonium acetate in an ethanol solvent, and carrying out a reaction process in the presence of acetic acid as a catalyst to obtain a desired product probe. The fluorescence-enhanced probe compound has good selectivity and sensitivity to trivalent chromium ions and has a fast response speed. The trivalent chromium ion detection method has a simple sample pretreatment process and is suitable for detection of a trace amount of trivalent chromic ions in water and in the environment.

Stable, homogeneous melt solutions are prepared at temperatures of 200° C. or less from solid mixtures comprising at least one diaryl carbonate, at least one high melting dihydroxy aromatic compound (mp>200° C.), a transesterification catalyst, and optionally a lower melting dihydroxy aromatic compound. Thus, a stable, homogeneous melt solution is obtained from a solid mixture comprising 4,4′-biphenol (mp 282-284° C.) at a temperature of about 200° C. using either diphenyl carbonate or bis(methyl salicyl) carbonate as the diaryl carbonate component. It is shown that formation of the stable, homogeneous melt solutions requires the presence of the transesterification catalyst when substantial amounts of the high melting dihydroxy aromatic compound are present in the initial solid mixture. Solid mixtures comprising a variety of high melting bisphenols; 4,4′-biphenol; 3,3,3,3′-tetramethylspirobiindanbisphenol, and 4,4′-sulfonyidiphenol are converted to stable, homogeneous melt solutions at 200° C., a temperature substantially below the melting points of the high melting bisphenols in their pure states.

The invention provides an aqueous dispersion for chemical mechanical polishing that can limit scratches of a specific size to a specific number, even with interlayer insulating films with small elastic moduli (silsesquioxane, fluorine-containing SiO₂, polyimide-based resins, and the like.). When using the aqueous dispersion for chemical mechanical polishing of an interlayer insulating film with an elastic modulus of no greater than 20 GPa as measured by the nanoindentation method, the number of scratches with a maximum length of 1 μm or greater is an average of no more than 5 per unit area of 0.01 mm² of the polishing surface. An aqueous dispersion for CMP or an aqueous dispersion for interlayer insulating film CMP according to another aspect of the invention contains a scratch inhibitor agent and an abrasive. The scratch inhibitor may be biphenol, bipyridyl, 2-vinylpyridine, salicylaldoxime, o-phenylenediamine, catechol, 7-hydroxy-5-methyl-1,3,4-triazaindolizine, and the like. The abrasive may consist of inorganic particles, organic particles or organic/inorganic composite particles. The organic/inorganic composite particles may be formed by polycondensation of an alkoxysilane, aluminum alkoxide, titanium alkoxide, and the like in the presence of polymer particles of polystyrene or the like, and bonding of polysiloxane, and the like, on at least the surface of the polymer particles.

The invention discloses synthesis and application of a Pt/BiVO4 composite photocatalyst adopting a laminar structure. The synthesized photocatalyst is a heterogeneous composite photocatalyst which is formed by supporting Pt on laminar BiVO4 surface and has good photocatalytic activity. A Pt/BiVO4 composite adopting the laminar structure is taken as the photocatalyst, a xenon lamp with light emission wavelength lambda larger than 400 nm and the power being 300 W is used for irradiating 2,6-disubstituted phenol at the room temperature, a coupling reaction is performed, and a corresponding biphenol compound is synthesized; or 2,4-disubstituted phenol is irradiated, the coupling reaction is performed, and a corresponding xenol compound in a hydroxy ortho-position is synthesized.

The invention relates to a fluorescence sensing material based on rhodamine B and hydroxy-4-biphenylcarbonitrile, and a preparation method and application thereof, and belongs to the technical fieldsof a fluorescence chemical sensing material and chemical analysis and detection. The preparation method comprises the following steps: dissolving rhodamine diethylenediamine and 3-formyl-4-hydroxy-4-biphenylcarbonitrile into absolute ethanol, adding a proper amount of glacial acetic acid, stirring and refluxing in an oil bath pot, cooling to room temperature after the reaction, reducing pressure and removing the solvent to obtain a crude product, and performing recrystallization in ethanol to obtain the fluorescence sensing material. The fluorescence sensing material prepared by the method hasmultiple responsiveness on four metal ions such as Zn<2+>, Al<3+>, Fe<3+> and Cr<3+>, can realize effective detection on the trace amount of the target metal ions in the environment water sample wellby taking out different fluorescence signals, and has the characteristics of easily available raw materials, simple preparation process, high product stability, high detection sensitivity and the like.

The present invention belongs to the field of chemical medicine, and particularly relates to 3-allyl-[1,1'-biphenyl]-4-phenol, derivatives, preparation methods and uses thereof. A technical problem solved by the present invention is to provide a new class of compounds: 3-allyl-[1,1'-biphenyl]-4-phenol represented by a formula I and derivatives thereof. Experiment results of the present invention show that 3-allyl-[1,1'-biphenyl]-4-phenol represented by the formula I and the derivatives thereof have good effects of anti-tumor, anti-angiogenesis, anti-oxidation and other disease resistance, and provide a new selection for drug preparation.

A polymer composition including a polyetherimide comprising repeating units of formula (1) and formula (2) [Formula should be inserted here] wherein the repeating units of formula (1) are present in an amount of at least 10 mole %, preferably 20 to 100 mole %, Z is independently at each occurrence derived from a biphenol; Z′ is independently at each occurrence a group of formulas (3) to (13) as defined herein, preferably bisphenol A, 1,2-dihydroxybenzene, 1,1-bis(4-hydroxyphenyl)-1-phenyl-ethane, isophorone bisphenol (1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane), spirobiindane bisphenol, dimethylindanone bisphenol, 3,3′-dimethylbisphenol cyclohexane, or fluorenone bisphenol; and R is independently at each occurrence as a C_6-20 aromatic hydrocarbon group or a halogenated derivative thereof, a straight or branched chain C_2-20 alkylene group or a halogenated derivative thereof, a C_3-8 cycloalkylene group or halogenated derivative thereof; wherein the polyetherimide has a Tg of greater than 200° C.

Compositions and methods for a semicrystalline poly(aryl ether ketone) copolymers incorporating 2-benzimidazolinone and 4,4′-biphenol as comonomer units with 4,4′-dihalobenzophenone, and compositions and methods for semicrystalline poly(aryl ether ketone) copolymers incorporating 2-benzimidazolinone and 4,4′-biphenol as comonomer units with 1,4-bis(4-dihalobenzoyl)benzene are described herein. The Copolymers have advantageous properties, particularly in terms of high glass transition temperatures (T_g), high melting temperatures (T_m), crystallinity and chemical resistance. The copolymers are suitable for manufacturing high temperature and chemical resistance molded systems and other articles of manufacture via injection molding, extrusion, compression molding, coating, and additive manufacturing.

The invention relates to the field of plastic, in particular to corrosion resistant and heat resistant modified plastic applied to preparation of special pipelines, with excellent chemical reagent tolerance and high temperature tolerance, and a preparation technology thereof. The plastic comprises the following preparation materials in parts by weight: 400 to 600 parts of epoxy-modified organic silicon resin, 720 to 1150 parts of emery powder, 280 to 350 parts of titanium dioxide, 55 to 85 parts of glass powder, 360 to 525 parts of modified epoxy resin, 290 to 370 parts of biphenyl novolac, 180 to 310 parts of benzoxazine, 110 to 135 parts of a modifier, 215 to 315 parts of industrial pure aluminum powder, 95 to 130 parts of industrial pure magnesium powder, 15 to 25 parts of high purity aluminum powder, 40 to 75 parts of aluminum copper alloy powder, 15 to 32 parts of aluminum manganese alloy powder, and 11 to 19 parts of aluminum zirconium alloy powder.

The invention discloses a biphenol-based organic solvent composite nanofiltration membrane and a preparation method thereof, and belongs to the technical field of separation membranes. The preparation method comprises the following steps: by taking a polyacrylonitrile or polyimide ultrafiltration membrane as a base membrane, removing a surface pore-retaining agent, firstly soaking in an aqueous solution containing a 2, 2 '-diphenol compound, then soaking in an organic solution containing multi-acyl chloride to carry out interfacial polymerization reaction, and finally, carrying out thermal crosslinking drying to obtain the composite nanofiltration membrane. The composite nanofiltration membrane disclosed by the invention has relatively high stability in various polar organic solvents, has high selectivity and permeability to organic molecules, and has relatively high economic value in separation of an organic solvent system in industry.

The present disclosure relates to a liquid crystal polyester composition that can be injection molded into an ultra-thin film and has improved fluidity, and a manufacturing method thereof. The polyester resin composition for ultra-thin injection molding includes 60 to 85% by weight of a liquid crystal polyester resin and 15 to 40% by weight of an inorganic filler having an average cross-sectional aspect ratio of 2 to 6, based on the total weight of the composition, wherein the liquid crystal polyester resin includes 0.1 to 10 mol % of hydroxybenzoic acid (HBA), 40 to 60 mol % of hydroxynaphthoic acid, 20 to 30 mol % of biphenol, and 20 to 30 mol % of terephthalic acid. The liquid crystal polyester resin composition for ultra-thin injection molding according to the present disclosure not only has excellent mechanical strength and heat resistance, but also can exhibit very excellent fluidity in a high-speed injection process.

The present invention relates to use of biphenols in the preparation of a medicament for the prevention and treatment of ischemic stroke, specifically to use of 3,3′,5,5′-tetraisopropyl-4,4′-biphenol and salt, ester, or solvate thereof in the preparation of a medicament for the prevention and treatment of ischemic stroke injury.