3731 results about "Phosphoric Acid Esters" patented technology

Methods and intermediates for the preparation of oligomers containing diastereomerically enriched phosphorothioate and boranophosphate linkages are disclosed.

A class of 2′-fluoro-nucleoside compounds are disclosed which are useful in the treatment of hepatitis B infection, hepatitis C infection, HIV and abnormal cellular proliferation, including tumors and cancer. The compounds have the general formulae:

wherein

• [0001]
  • Base is a purine or pyrimidine base;
  [0002]
  • R¹ is OH, H, OR³, N₃, CN, halogen, including F, or CF₃, lower alkyl, amino, loweralkylamino, di(lower)alkylamino, or alkoxy, and base refers to a purine or pyrimidine base;
  [0003]
  • R² is H, phosphate, including monophosphate, diphosphate, triphosphate, or a stabilized phosphate prodrug; acyl, or other pharmaceutically acceptable leaving group which when administered in vivo, is capable of providing a compound wherein R² is H or phosphate; sulfonate ester including alkyl or arylalkyl sulfonyl including methanesulfonyl, benzyl, wherein the phenyl group is optionally substituted with one or more substituents as described in the definition of aryl given above, a lipid, an amino acid, peptide, or cholesterol; and
  [0004]
  • R³ is acyl, alkyl, phosphate, or other pharmaceutically acceptable leaving group which when administered in vivo, is capable of being cleaved to the parent compound, or a pharmaceutically acceptable salt thereof.

An anisotropic conductive adhesive contains conductive particles dispersed in a resin composition, wherein the resin composition includes a radical polymerization resin (A), an organic peroxide (B), a thermoplastic elastomer (C) and a phosphoric ester (D). The resin composition can further contain an epoxy silane coupling agent (E) represented by formula (2) or (3). The resin composition is mixed with other components after the radical polymerization resin (A), the thermoplastic elastomer (C), the phosphoric ester (D) and the epoxy silane coupling agent (E) are reacted. It is also possible to preliminarily react only the phosphoric ester (D) and the epoxy silane coupling agent (E) and to react the product of the preliminary reaction with the radical polymerization resin (A) and the thermoplastic elastomer (C), and then to add other components. The anisotropic conductive adhesive of the present invention can be used for electrical joining of electronic or electric parts of electrical apparatus.

The present invention relates to catalyst system for propylene hydrogenation and formylation and process of catalytically synthesizing butyl aldehyde. The catalyst system is triaryl phosphine-Rh(I) catalyst system with proper additive, such as bisphosphite ester, in proper amount. Compared with similar available catalyst, the catalyst system has obviously higher catalytic acitivity, higher selectivity, higher stability and raised n-butyl aldehyde/isobutyl aldehyde ratio in the catalytically synthesized product.

An ink composition for ink jet printing is provided which gives a cured object excellent in adhesion to metallic plates, resistance to etchants, and alkali removability and can be stably ejected with an ink jet apparatus. The ink jet composition for etching resists has a viscosity at 25° C. of 3-50 mPa s and includes monomers comprising: either a polymerizable phosphoric ester compound represented by general formula (I); a polyfunctional monomer having two or more ethylenic double-bond groups per molecule and having no phosphoric ester group, the content of the ethylenic double-bond groups being 4×10⁻³ to 8×10⁻³ mol/g; and a monofunctional monomer having one ethylenic double-bond group per molecule and having neither phosphoric ester group nor carboxy group.

In the formula, X represents C_1-3 alkylene, Y represents C_2-3 alkylene, and R represents hydrogen or methyl.

The present invention provides a catalyst for polyester production capable of producing a polyester with high catalytic activity and a process for producing a polyester using the catalyst. The catalyst for polyester production comprises a solid titanium compound which is obtained by dehydro-drying a hydrolyzate obtained by hydrolysis of a titanium halide and which has a molar ratio (OH/Ti) of a hydroxyl group (OH) to titanium (Ti) exceeding 0.09 and less than 4. The present invention also provides a method to obtain a polyester having a small increase of the acetaldehyde content during the molding. This method comprises bringing a polyester, which is obtained by the use of a titanium compound catalyst and in which the reaction has been completed, into contact with a phosphoric ester aqueous solution or the like having a concentration of not less than 10 ppm in terms of phosphorus atom. The present invention further provides a polyester having excellent transparency and tint and molded products of the polyester such as a blow molded article, a film, a sheet and a fiber. The polyester is obtained by polycondensing an aromatic dicarboxylic acid or an ester-forming derivative thereof and an aliphatic diol or an ester-forming derivative thereof in the presence of a catalyst for polyester production which comprises a polycondensation catalyst component comprising a solid titanium compound and a co-catalyst component comprising a magnesium compound. This polyester has a titanium content of 1 to 100 ppm, a magnesium content of 1 to 200 ppm and a weight ratio (Mg/Ti) of magnesium to titanium of not less than 0.01.

A flame-retardant resin composition comprises 10 to 300 parts by weight of a flame retardant (B) and 1 to 200 parts by weight of an inorganic filler (C) (a glass fiber and/or a glass flake), relative to 100 parts by weight of a base resin (A). The flame retardant (B) comprises a polyphenylene oxide-series resin and/or a polyphenylene sulfide-series resin (B1), a phosphoric ester (B2), and a nitrogen-containing cyclic compound (B3) (for example, a polyphosphate of an amino group-containing triazine compound). The inorganic filler (C) has been treated with a surface-treatment agent or sizing agent containing a novolak epoxy resin. Such a resin composition is useful for obtaining a shaped article which has been inhibited from dripping and to which flame retardancy is highly imparted.

The optical filter of the present invention is provided with a near infrared light absorption layer that contains a component composed of copper ions and a phosphoric ester compound expressed by the following Formula (10), in which the phosphorus atom content in the near infrared light absorption layer is 0.4 to 1.3 mol per mole of copper ions, and the copper ion content in the near infrared light absorption layer is 2 to 60 wt %. Thus keeping the phosphorus atom and copper ion content within specific ranges results in good near infrared light absorption and in improved moisture resistance whereby devitrification caused by whitening is suppressed

A method for recovering nickel from an sulfuric acid aqueous solution, for recovering nickel in an effectively utilizable form as a raw material of nickel industry material, by separating efficiently impurity elements of iron, aluminum, manganese and the like, from the sulfuric acid aqueous solution containing nickel and cobalt, and the impurity elements, iron, aluminum, manganese and the like.

The method is characterized by comprising the following steps (1) to (5).

• • step (1): to subject the sulfuric acid aqueous solution to oxidation neutralization treatment.
  • step (2): then, to subject the solution to neutralization treatment, and to separate and recover mixed hydroxides containing nickel and cobalt.
  • step (3): to subject the mixed hydroxides to dissolution treatment in a sulfuric acid solution having a concentration of equal to or higher than 50% by mass.
  • step (4): to subject the concentrated solution to solvent extraction treatment, using a phosphate ester-based acidic extraction agent.
  • step (5): by adding a neutralizing agent to the resultant extraction residual liquid, to subject the solution to the neutralization treatment, and to separate and recover nickel hydroxide generated.

A thermoplastic molding composition having improved flammability rating and mechanical properties is disclosed. The composition contains aromatic polycarbonate having a weight-average molecular weight M_w≧25,000 g/mol., polyalkylene terephthalate, graft (co)polymer characterized in that its grafted phase includes structural units derived from acrylate monomers, an oligomeric organic phosphoric acid ester, and an optional fluorinated polyolefin. In a preferred embodiment the graft (co)polymer is characterized in its core-shell morphology.

A process for preparing phosphoramidate prodrugs or cyclic phosphate prodrugs of nucleoside derivatives, which is a compound, its stereoisomers, salts (acid or basic addition salts), hydrates, solvates, or crystalline forms thereof.

It is an object of the present invention to provide a polylactic acid composition having excellent crystallinity, wet heat stability and melt stability. It is another object of the present invention to provide a molded article which is obtained from the polylactic acid composition and excellent in appearance and color. The present invention is a composition and molded article thereof which comprises a polylactic acid (component A), a carbodiimide compound (component B) and a phosphoric acid ester metal salt (component C).

A flame-retardant resin composition comprises (A) abase resin; (B) a flame retardant comprising (B1) at least one aromatic resin selected from a pblyphenylene oxide-series resin and a polyphenylene sulfide-series resin, (B2) a phosphoric ester, and (B3) a nitrogen-containing cyclic compound; and (C) a styrenic resin having a melt flow rate of not more than 8 g/10 minutes. The base resin may be a polyester-series resin. The styrenic resin (C) may be a styrenic resin having a melt flow rate of 0.1 g/10 minutes to not more than 5 g/10 minutes. The phosphoric ester (B2) may be a condensed phosphoric ester, and the nitrogen-containing cyclic compound (B3) may be a polyphosphate of an amino group-containing triazine compound, a polyphosphoric acid amide, or others. The present invention provides a flame-retardant resin composition which has been flame-retarded without using a halogen-containing flame retardant.

Provided are a carbon fiber reinforced composite material which exhibits excellent flame retardance, fast curing properties, heat resistance, and mechanical characteristics. Also provided are an epoxy resin composition suitable for use in producing said carbon fiber reinforced composite material as well as a prepreg and housing for electronic/electrical components. The epoxy resin composition is characterized by comprising: [A] an epoxy resin containing at least 50 mass % of a compound as represented by general formula (I), [B] an organic nitrogen compound based curing agent, [C] a phosphoric acid ester, and [D] a phosphazene compound. In general formula (I), R₁, R₂, and R₃ are either a hydrogen atom or a methyl group, and n is an integer of 1 or higher.

The invention provides a phosphorus-contained organic silicon resin fire retardant shown as a following formula and a preparation method thereof. The preparation method of the phosphorus-contained organic silicon resin fire retardant comprises the following steps: firstly, adopting polyalcohol and phosphorus oxychloride as raw materials to prepare chlorinated volution phosphoester; then carrying out hydrolytic condensation on amino-containing silane, dialkoxy silane and trialkoxysilane to obtain amino-containing organic silicon resin; finally dissolving the amino-containing organic silicon resin into a methylbenzene solvent, an N,N-dimethyl fomamide solvent or an acetonitrile solvent, and the like, and adding the chlorinated volution phosphoester and an acid-binding agent for synthesis to obtain the phosphorus-containing organic silicon resin fire retardant. The phosphorus-containing organic silicon resin fire retardant can be used as a fire retardant for polyolefin, makrolan, ABS, nylon and PC/ABS, has high efficiency and low toxicity compared with the traditional fire retardant and is an environmental protection type fire retardant for plastics. R1, R2, R3 and R4 are respectively selected from CH3 or C6H5, R5 is selected from CH2 or CH2CH2 or CH2CH2NHCH2CH2, and R6 is selected from the CH3 or C2H5; n is equal to integers of 1 subtracting 50, P is equal to integers of 1 subtracting 50, and q is equal to integers of 1 subtracting 50.

The present invention relates to a method of purifying organic diphosphite compounds.