750 results about "Benzoxazole" patented technology

Disclosed is a novel benzoxazole derivative which has high excitation energy, particularly high triplet excitation energy, and is a bipolar substance. A benzoxazole derivative represented by the following General Formula (G1) is provided.

In the formula, R¹ and R² independently represent a hydrogen atom, an alkyl group with 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group with 6 to 13 carbon atoms, substituents of the substituted aryl group may be bonded to form a ring which may form a spiro ring structure, R¹¹ to R¹⁴ independently represent a hydrogen atom, a halogen, an alkyl group with 1 to 4 carbon atoms, or an unsubstituted aryl group with 6 to 10 carbon atoms, a bond formed between any two of α, β, and γ forms a carbazole skeleton, and n is 0 to 3.

A heat resistant negative working photosensitive composition that comprises

• • (a) one or more polybenzoxazole precursor polymers (I):
  • wherein x is an integer from about 10 to about 1000, y is an integer from 0 to about 900 and (x+y) is about less then 1000; Ar¹ is selected from the group consisting of a tetravalent aromatic group, a tetravalent heterocyclic group, or mixtures thereof; Ar² is selected from the group consisting a divalent aromatic, a divalent heterocyclic, a divalent alicyclic, a divalent aliphatic group that may contain silicon, or mixtures thereof; Ar³ is selected from the group consisting a divalent aromatic group, a divalent aliphatic group, a divalent heterocyclic group, or mixtures thereof; Ar⁴ is selected from the group consisting Ar¹ (OH)₂ or Ar²; G is an organic group selected from the group consisting groups having a carbonyl, carbonyloxy or sulfonyl group attached directly to the terminal NH group of the polymer;
  • (b) one or more photo-active compounds which release acid upon irradiation (PAGs);
  • (c) a latent crosslinker which contains at least two ˜N—(CH₂OR)_n units wherein n=1 or 2 and R is a linear or branched C₁-C₈ alkyl group, with the proviso that when a glycoluril is employed as the latent crosslinker, the G group in the polybenzoxazole precursor polymer is produced from the reaction of a cyclic anhydride; and
  • (d) at least one solvent that is not NMP.

The present invention relates to a binder composition for a fuel cell including a proton conductor and one or more binders selected from the group consisting of poly[2,2′-(m-phenylene)-5,5′-bibenzimidazole] (PBI), poly[2,5-benzimidazole] (ABPBI), polybenzoxazole (PBO), and polybenzothiazole (PBT).

The compounds of the present invention are represented by the chemical structure found in Formula (I):

wherein:

• • the carbon atom designated * is in the R or S configuration; and X is a fused bicyclic carbocycle or heterocycle selected from the group consisting of benzofuranyl, benzo[b]thiophenyl, benzoisothiazolyl, benzoisoxazolyl, indazolyl, indolyl, isoindolyl, indolizinyl, benzoimidazolyl, benzooxazolyl, benzothiazolyl, benzotriazolyl, imidazo[1,2-a]pyridinyl, pyrazolo[1,5-a]pyridinyl, [1,2,4]triazolo[4,3-a]pyridinyl, thieno[2,3-b]pyridinyl, thieno[3,2-b]pyridinyl, 1H-pyrrolo[2,3-b]pyridinyl, indenyl, indanyl, dihydrobenzocycloheptenyl, tetrahydrobenzocycloheptenyl, dihydrobenzothiophenyl, dihydrobenzofuranyl, indolinyl, naphthyl, tetrahydronaphthyl, quinolinyl, isoquinolinyl, 4H-quinolizinyl, 9aH-quinolizinyl, quinazolinyl, cinnolinyl, phthalazinyl, quinoxalinyl, benzo[1,2,3]triazinyl, benzo[1,2,4]triazinyl, 2H-chromenyl, 4H-chromenyl, and a fused bicyclic carbocycle or fused bicyclic heterocycle optionally substituted with substituents (1 to 4 in number) as defined in R¹⁴;
  • with R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, and R¹⁴ defined herein.

Disclosed is a novel organic semiconductor material which has a twisted quaterphenylene skeleton as a central unit and simultaneously possesses a skeleton having an electron-transporting property and a skeleton having a hole-transporting property at the terminals of the quaterphenylene skeleton. Specifically, the organic semiconductor material has a [1,1′:2′,1″:2″,1′″]quaterphenyl-4-4′″-diyl group, and one of the terminals of the [1,1′:2′,1″:2″,1′″]quaterphenyl-4-4′″-diyl group is bonded to a skeleton having an electron-transporting property such as a benzoxazole group or an oxadiazole group. A skeleton having a hole-transporting property such as diarylamino group is introduced at the other terminal. This structure allows the formation of a compound having a bipolar property, a high molecular weight, an excellent thermal stability, a large band gap, and high triplet excitation energy.

The invention is a cosmetic or dermatological preparation effective as light-protective, comprising (a) at least one bis-resorcinyltriazine derivative and (b) at least one benzoxazole derivative. The invention is also a cosmetic or dermatological preparation comprising at least one bis-resorcinyltriazine derivative and at least one benzoxazole derivative of a specified chemical structure. The invention is also a method of treating or preventing cosmetic or dermatological changes in the skin, a method of tanning or accelerating tanning of the skin, and a method of protecting the skin against light-induced aging, each comprising applying the preparation to the skin. The invention also includes a wipe impregnated with the preparation.

The present invention discloses new quinolone derivatives with 3-position substituted by imidazol radical, benzoxazole and benzothiazole and possessing antitumor activity. The preparation process ofthe compounds is also disclosed.

The invention relates to a fluorescent ion probe (I) with high selectivity and high sensitivity in detection and the application of the fluorescent ion probe in identifying and detecting heavy metal ion and transition metal ion, wherein, the Y is an organic conjugate group with fluorescence transmitting function such as pyrene, naphthalene, 4-amidogen-1, 8-naphthyl imide, Dan sulfonamide, anthracene, carbazole, benzimidazoins, benzoxazoles, boron fluoride bipyrrole (BODIPY), fluorescein, 3, 4, 9, 10-perylenetetracarboxylic diimide or rhodamine B; the X is acylamino group, sulfoamino group or ester group. The fluorescent ion probe uses the fluorescence peak of fluorescence chromophore aggregate as the response signal to identify metal ion, thereby effectively avoiding the quenching effect of transition metal ion and heavy metal ion on fluorophore; moreover, the fluorescent ion probe realizes selective identification of heavy metal ion and transition metal ion in various solvents and aqueous solution in particular.

The present invention provides a process for making an integrally skinned asymmetric polybenzoxazole hollow fiber membrane comprising spinning a dope solution via a dry-wet phase inversion technique to form a porous integrally skinned asymmetric o-hydroxy substituted polyimide or an o-hydroxy substituted polyamide hollow fiber membrane comprising microporous inorganic molecular sieve followed by thermal rearrangement at a temperature from about 250° to 500° C. to convert the polyimide or polyamide membrane into a polybenzoxazole membrane. These membranes contain microporous inorganic molecular sieve materials that can have a particle size from about 20 nm to 10 μm.

Resin compositions, which contain: (a) a heat-resistant resin which is soluble in organic solvents wherein the heat-resistant resin is one or more heat-resistant resin(s) selected from the group consisting of a polyimide resin, a polyamide-imide resin, a polyamide resin, a polyether imide resin, a polybenzoxazol resin, a polybenzimidazole resin, copolymers thereof, and mixtures thereof; (b) a thermosetting resin; (c) a filler; and (d) resin having a polybutadiene structure and/or a polysiloxane structure, wherein: the heat-resistant resin (a) and the thermosetting resin (b) are present in a weight ratio of heat-resistant resin (a) to thermosetting resin (b) of from 100:1 to 1:1; the heat-resistant resin (a), thermosetting resin (b), and filler (c) are present in relative amounts such that weight ratio of the total amount of heat-resistant resin (a) and thermosetting resin (b) to filler (c) by weight is from 100:1 to 3:2; the resin having a polybutadiene structure and/or a polysiloxane structure (d) is present in an amount of 0.1 to 15 parts by weight based on 100 parts by weight of the heat-resistant resin (a); and the heat-resistant resin (a), thermosetting resin (b), filler (c), and resin having a polybutadiene structure and/or a polysiloxane structure (d) are present in a total amount of not less than 70% by weight, based on the total weight of the resin composition, are useful for preparing adhesive films, which are, in turn, useful for forming interlayer insulation layers for multi-layered printed wiring boards having an excellent mechanical strength and capable of being roughened by an oxidizing agent.

Compositions and methods of use of boron derivatives, including benzoxaboroles, benzazaboroles and benzthiaboroles, as therapeutic agents for treatment of diseases caused by fungi, yeast, bacteria or viruses are disclosed, as well as methods for synthesis of said agents and compositions thereof.

The invention discloses a liquid crystal compound containing benzoxazole and difluoromethylenedioxy bridged linkage (-CF2O-) and a preparation method and application of the liquid crystal compound. The structural general formula of the compound is as formula I. The compound is relatively stable in structure, and has a wide temperature range of the liquid crystal state, good intersolubility at low temperature and large positive dielectric anisotropy delta epsilon. When the compound is used in an optical element, low threshold voltage and small rotary viscosity gamma can be achieved. Thus, the material of a liquid crystal composition and the performance of a display can be improved, and the liquid crystal compound containing benzoxazole and the difluoromethylenedioxy bridged linkage plays a significant role in the achievement of rapid response of the display. A liquid crystal composition containing the compound can be applied to the production of a liquid crystal display which is low in driving voltage, wide in temperature range and rapid in response.

The invention relates to a silver plating anti-tarnish protectant compound. The protectant compound comprises the following components in percentage by weight: 13 to 15 percent of aliphatic alcohol polyoxyethylene ether, 8 to 10 percent of 1-phenyl-pentasulfhydyl tetrazole, 4 to 5 percent of 2-sulfhydryl benzoxazole, 3 to 5 percent of t-dodecyl mercaptan, 3 to 5 percent of 2-sulfhydryl benzimidazole, 8 to 10 percent of anhydrous ethanol, 8 to 10 percent of ethylene glycol, and the balance of deionized water. The silver plating anti-tarnish protectant compound forms a protective complex film on a silver surface, has a higher corrosion inhibition rate, and obviously improves the sulfidation resistance and abrasion resistance of the silver surface. The silver plating anti-tarnish protectant compound is mainly used for the tarnish prevention of silvered electronic parts and components, and is also applied to the sulfidation and tarnish prevention of silver or silvered jewellery, jewelry, ornaments, artwork, tableware, and the like. The silver plating anti-tarnish protectant compound can effectively protect silvered articles against sulfidation and tarnish in a certain period, keep the original metal luster and has no influence on the conductivity and weldability of the parts.

The present invention discloses new types of polybenzoxazole-based mixed matrix membranes and methods for making and using these membranes. The polybenzoxazole-based mixed matrix membranes are prepared by fabricating a polyimide-based mixed matrix membrane by dispersing molecular sieve particles in a continuous aromatic polyimide matrix with pendent hydroxyl groups ortho to the heterocyclic imide nitrogen; and then converting the polyimide-based mixed matrix membrane to a polybenzoxazole-based mixed matrix membrane by heating between 200° and 600° C. under inert atmosphere or vacuum. The polybenzoxazole-based mixed matrix membranes of the present invention can be fabricated into any convenient geometry such as flat sheet (or spiral wound), tube, hollow fiber, or thin film composite. These polybenzoxazole-based mixed matrix membranes exhibit high thermal stability, significantly higher selectivity than the neat polybenzoxazole polymer membranes, and much higher permeability than traditional mixed matrix membranes.

The invention provides a triarylamine compound and an organic electroluminescent device thereof, and relates to the technical field of organic photoelectric materials. According to the invention, a substituted or unsubstituted 9-phenyl-fluorene group and a triarylamine group containing benzoxazole/benzothiazole/benzimidazole/benzotriazole undergoes a reaction to obtain the triarylamine compound by9-position (tertiary C) connection of fluorene. The triarylamine compound has a good hole transport capability, is high in glass transition temperature, good in thermal stability, good in film-forming property, high in refractive index and simple to synthesize, can be applied to an organic electroluminescent device to serve as a hole transport layer and/or a covering layer, can effectively solvethe problems of low luminous efficiency and short service life of the organic electroluminescent device, and has the advantages of high luminous efficiency and long service life.

The invention relates to compounds of formula 1, the production and use thereof as a medicament for the treatment of diseases, particularly tumours and/or diseases caused, mediated or propagated by angiogenesis. The compounds of formula 1 are effective inhibitors of tyrosin kinases, particularly TIE-2 and VEGFR, and Raf-kinases. (I)

A polybenzoxazole precursor having recurring units represented by the following general formula (1) and a polybenzoxazole resin having a structure obtained by cyclizing the polybenzoxazole precursor:wherein n denotes an integer of 1-1000, and (i) when X is selected from bivalent aromatic groups represented by the general formulas (2)-(4) defined in the specification each having two OR groups (Rs each denotes H or a monovalent organic group and may be the same or different), and the amide group in the formula (1) and the OR group respectively bond to the adjacent carbon atoms of the aromatic group, Y denotes a bivalent organic group containing fluorine; and (ii) when Y is selected from bivalent aromatic groups represented by the general formulas (5)-(7) defined in the specification, X denotes a bivalent aromatic group containing fluorine and having two OR groups (Rs each denotes H or a monovalent organic group and may be the same or different), and the amide group in the formula (1) and the OR group respectively bond to the adjacent carbon atoms of the aromatic group.

The invention is related to an iontophoretic method for the delivery of a compound of the formula

wherein R is defined herein, and pharmaceutically acceptable salts and prodrugs thereof; and, wherein the method comprises: (a) applying a transdermal device to the skin of a living body, wherein the transdermal device has a reservoir containing the compound of formula I or a composition thereof and optionally a pharmaceutically acceptable electrolyte; (b) causing current to flow through the skin so as to iontophoretically deliver the compound of formula 1. The invention is further related to iontophoretic systems and to kits containing the iontophoretic system combined with one or more cartridges containing a compound of formula I, and to cartridges containing a compound of formula I.

In the present invention high performance cross-linked polybenzoxazole and polybenzothiazole polymer membranes and methods for making and using these membranes have been developed. The cross-linked polybenzoxazole and polybenzothiazole polymer membranes are prepared by: 1) first synthesizing polyimide polymers comprising pendent functional groups (e.g., —OH or —SH) ortho to the heterocyclic imide nitrogen and cross-linkable functional groups in the polymer backbone; 2) fabricating polyimide membranes from these polymers; 3) converting the polyimide membranes to polybenzoxazole or polybenzothiazole membranes by heating under inert atmosphere such as nitrogen or vacuum; and 4) finally converting the membranes to high performance cross-linked polybenzoxazole or polybenzothiazole membranes by a crosslinking treatment, preferably UV radiation. The membranes can be fabricated into any convenient geometry. The high performance cross-linked polybenzoxazole and polybenzothiazole polymer membranes of the present invention are suitable for a variety of liquid, gas, and vapor separations.