160 results about "Phosphenic acid" patented technology

Molding compositions MC having a reduced tendency to yellow with thermal stress which consist of a polymer PM containing units of formula I: blending from 0.005-1 wt % of at least one reducing inorganic phosphorus compound IP selected from the group consisting of phosphinic and phosphonic acid and its alkali metal, alkaline-earth metal, aluminum and ammonium salts, wherein the ammonium ion can be substituted with up to four C1-C4 alkyl and / or C5-C8 cycloalkyl groups, with the polymer PM after conclusion of the imidation reaction.

The invention relates to a composite corrosion and scale inhibitor and application thereof. The composite corrosion and scale inhibitor comprises a) two different salts selected from the group consisting of water-soluble borate, water-soluble gluconate and water-soluble silicate, b) at least one organic phosphonic acid and c) at least one scale inhibition and dispersion agent, wherein the scale inhibition and dispersion agent is a polymer containing carboxylic groups. The composite corrosion and scale inhibitor provided in the invention has good comprehensive performance, an excellent effect on inhibiting CaCO3 scale, strong capability in stabilizing Zn<2> in water and good corrosion inhibition, is applicable to treatment of circulating cooling water and uses a small amount of organic phosphonic acid, thereby reducing harm to environment caused by discharge of phosphorus.

Provided is a novel method of making bisphosphonic acids, e.g. risedronic acid, including the step of combining a carboxylic acid, phoshorous acid, and a halophosphorous compound in the presence of a diluent that is an aromatic hydrocarbon or a silicone fluid. When the diluent is an aromatic hydrocarbon, a inert support or ortho-phosphoric acid codiluent is advantageously included.

Methods for the synthesis of cyclic phosphonic acid diesters from 1,3-diols are described, whereby cyclic phosphonic acid diesters are produced by reacting a chiral 1,3-diol and an activated phosphonic acid in the presence of a Lewis acid.

A proton conducting polymer is formed by the copolymerization of a plurality of compounds, including a silicon compound comprising an organic chain, and a compound including at least one acid group. The polymer comprises a hybrid organic-inorganic matrix having acid groups linked through a linking group. The linking group may include one or more electron withdrawing groups. The electron withdrawing group may be a halogen.

The invention relates to an anti-incrustation corrosion inhibitor for a circulating water system with a high concentration time and a high chloride ion content. The anti-incrustation corrosion inhibitor comprises the following components in parts by weight: 1-100 parts of phosphoric acid and salt thereof, 1-500 parts of organic phosphonic acid and salt thereof, 5-1,000 parts of acrylic copolymer, 1-20 parts of zinc salt, 10-200 parts of anode corrosion inhibitor and 0.5-5 parts of imidazoline non-ferrous metal corrosion inhibitor. Compared with the prior art, the invention can effectively suppress under-deposit corrosion and point corrosion caused by low pH value and high chloride ion content.

Disclosed is a resin composition improved in flame retardance and electrical characteristics. Specifically disclosed is a flame retardant resin composition which is improved in electrical characteristics and composed of a base resin, a halogen flame retardant (namely, a bromine-containing flame retardant such as a brominated polybenzyl (meth)acrylate resin or brominated styrene resin), an organic phosphinic acid (such as dialkylphosphinic acid, alkylenephosphinic acid or cycloalkylenephosphinic acid) or a salt thereof (such as a metal salt or a salt with a nitrogen-containing compound having an amino group), and a flame retardant assistant which are different from the base resin (namely, an antimony-containing compound such as an antimony oxide or an antimonate, a fluorine-containing resin, a silicon-containing compound, an aromatic resin and / or a phosphorus-containing compound except for (fused) aminotriazine phosphates). This resin composition may further contain an olefin resin and an electrical characteristics improver assistant. Per 100 parts by weight of the base resin, there may be contained 3-30 parts by weight of a halogen flame retardant, 1-30 parts by weight of an organic phosphinic acid or a salt thereof, and 0.1-30 parts by weight of a flame retardant assistant.

The invention relates to an oilfield inhibitor. The invention is characterized in that the inhibitor is made by compounding imidazolines quaternarized and modified product and organic phosphonate copolymer according to a proportion of (1.5-2) to (0.8-1.2); wherein, the imidazolines quaternarized and modified product is synthesized by industrial organic acid, diethylenetriamine, xylene and nitrogen compounds according to chemical dose reaction; the organic phosphonate copolymer is synthesized by organic amine, aldehyde and inorganic phosphide according to chemical dose reaction. Because the molecular structure (the molecular structure of the quaternarized imidazolines and the phosphonate) of oilfield inhibitor contains polarity groups (namely hydrophilic group) of strong absorption performance, the invention not only can prevent the corrosion caused by H2S and SRB, but also can prevent the corrosion caused by CO2 and uneven scaling; the inhibiting performance is excellent and the cost is low.

The invention relates to a salt tolerant corrosion and scale inhibitor for underground oil-gas wells and a preparation method thereof. The salt tolerant corrosion and scale inhibitor is composed of an oxazoline derivative, thiourea, cetyl pyridinium chloride, dodecyl dimethyl benzyl ammonium chloride, amino trimethylene phosphonic acid, hydroxyethylidene diphosphonic acid, hexamethylenetetramine, and methanol. The corrosion and scale inhibitor has very strong salt resistance, and under high salinity conditions (100000-200000mg / L), has a significant inhibiting effect on metal corrosion, and the corrosion inhibition rate can reach more than 80%. The organic phosphonic acid molecular structure of the reagent contain a double bond structure, the structure and the calcium ions and magnesium ions in water can chelate to form a stable complex to be adsorbed on seed crystal surface active sites, thereby inhibiting crystal normal growth. With significant scale inhibiting effect and a scale inhibiting rate up to 94%, the product is suitable for inhibiting corrosion and scaling phenomena of oil-gas well rods and pipes containing carbon dioxide, hydrogen sulfide and other complex media conditions under high salinity.

Method of performing condensation reactions, acylations or of preparing heterocycles comprising forming cyclic phosphonic anhydride of the formula (III) by a) reacting phosphonic acid derivatives of formula (I) with acetic anhydride at a temperature ranging between 30 and 150° C. while separating a mixture of ethanoic acid and acetic anhydride by means of distillation, b) then reactively distilling the oligomeric phosphonic acid anhydrides of formula (II) obtained in step a) and transforming the same into the corresponding cyclic trimeric phosphonic acid anhydrides of formula (III), wherein n represents a number between 0 and 300 while R represents allyl, aryl, or open-chain, cyclic, or branched C1 to C8 alkyl radicals, aryloxy, allyloxy, or alkoxy comprising open-chain, cyclic, or branched C1 to C8 alkyl radicals. Preferably the cyclic trimeric phosphonic acid anhydrides formed in step b) are immediately dissolved in an organic solvent that exhibits an inert behavior relative thereto.

Compositions for preparing coatings on metal substrates include a phosphonic acid, polyvinyl alcohol, an optional catalyst, and optionally an organo-functional silane. The catalyst may be a group IV-B compound, a boron compound, a vanadium compound, or a molybdenum compound. The compositions may be applied from an aqueous carrier to a metal surface and then dried to form a coating imparting good paint adhesion and corrosion resistance to the metal substrate.

The present invention relates to a method for producing a phosphoric acid ester-based polymer, including copolymerizing a monomer 1 represented by the following formula (1), a monomer 2 represented by the following formula (2), and a monomer 3 represented by the following formula (3), at pH 7 or lower, in the present of a polymerization solvent having a dissolved oxygen concentration at 25° C. of 0.01 to 4.0 mg / kg. The invention also relates to a method for producing a phosphoric acid ester-based polymer, including copolymerizing the monomers 1, 2 and 3 at pH 7 or lower, in the presence of a phosphonic acid-based chelating agent. The invention also relates to a method for producing a phosphoric acid ester-based polymer from a mixed solution containing the monomer 1, 2 and 3, including obtaining a mixed solution by mixing the monomers 1 to 3 at a temperature of 10 to 50° C., initiating a polymerization within 72 hours after the mixing of the monomers 1 to 3, and maintaining the temperature of the mixed solution in the range of 10 to 50° C. until the polymerization is initiated:wherein R1 and R2 each represent a hydrogen atom or a methyl group; and R3 represents a hydrogen atom or —COO(AO)nX [wherein AO represents an oxyalkylene group or oxystyrene group having 2 to 4 carbon atoms; n represents an average number of added moles of AO, and is a number from 3 to 200; and X represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms],wherein R4 represents a hydrogen atom or a methyl group; R5 represents an alkylene group having 2 to 12 carbon atoms; m1 represents a number from 1 to 30; and M represents a hydrogen atom, an alkali metal or an alkaline earth metal, andwherein R6 and R8 each represent a hydrogen atom or a methyl group; R7 and R9 each represent an alkylene group having 2 to 12 carbon atoms; m2 and m3 each represent a number from 1 to 30; and M represents a hydrogen atom, an alkali metal or an alkaline earth metal.

Disclosed herein is a silane-functional mixture, comprising at least one phosphonic diester (A), at least one diphosphonic diester (A), or at least one phosphonic diester and one diphosphonic diester (A), and at least one compound (B) comprising at least two condensable silane groups.

[Purpose] To provide a cleaning liquid composition that has excellent removability for metallic impurities and particulates, does not cause corrosion of Cu, and can clean a semiconductor substrate having copper wiring in a production process for an electronic device such as a semiconductor device.[Solution means] A cleaning liquid composition for cleaning a semiconductor substrate having copper wiring, the cleaning liquid composition containing one or more types of basic compound containing no metal, and one or more types of phosphonic acid-based chelating agent, and having a hydrogen ion concentration (pH) of 8 to 10.

An efficient non-halogen flame-retarding polycarbonate is prepared from aromatic polycarbonate, the arylsulfonyl sulfonate of alkali metal or alkali-earth metal as flame-retarding agent and the phosphonate compound as another flame-retarding agent prepared from phenyl phosphonic chloride and diphenol. Its advantages are high flame-retarding performance and less release of toxic gas and smoke.

A method for enhancing corrosion resistance of a tin-based surface on a workpiece involving contacting the tin-based surface with a composition comprising a phosphonic acid compound and water to form a phosphorus-based film over the tin-based coating thereby inhibiting corrosion of the tin-based surface. Phosphonic acid containing compositions having a concentration up to about 30 vol. % of an organic solvent, and water.

Methods to control manganese deposition in an aqueous system, which include introducing a cerium-containing composition, and optionally another deposit control agent, to the aqueous system, are described. Also described, are cerium-containing compositions that promote the manganese stabilization performance of polymeric dispersants and phosphonic acids commonly used in water treatment applications. Cerium-containing compositions that can inhibit the oxidative degradation of deposit control agents are also described.

Chromate-free and metal phosphate free treatments and compositions for applying a conversion or passivation coating for metals, more particularly, steel, zinc coated steel, and aluminum surfaces. The methods of the invention comprise contacting the requisite metal surface with a treatment composition comprising a member or members comprising one or more Group IV B elements, fluoride, and phosphonic acid or phosphonate. Optionally, a silane may be added as a treatment component.

Compositions for preparing coatings on metal substrates include a phosphonic acid, polyvinyl alcohol, an optional catalyst, and optionally an organo-functional silane. The catalyst may be a group IV-B compound, a boron compound, a vanadium compound, or a molybdenum compound. The compositions may be applied from an aqueous carrier to a metal surface and then dried to form a coating imparting good paint adhesion and corrosion resistance to the metal substrate.

Methods for the synthesis of cyclic phosphonic acid diesters from 1,3-diols are described, whereby cyclic phosphonic acid diesters are produced by reacting a chiral 1,3-diol and an activated phosphonic acid in the presence of a Lewis acid.

The invention discloses a method for synthesizing bis(2,4,4-trimethylpentyl) phosphinic acid under normal pressure, which comprises: dissolving sodium hypophosphite in acetic acid; adding diisobutylene; dripping azodiisobutyronitrile into the solution under normal pressure and at room temperature; after the dripping is finished, heating till refluxing; reacting for 2 hours under a refluxing condition; dripping azodiisobutyronitrile once, and then dripping azodiisobutyronitrile every 1 to 3 hours; and finally, washing with alkali, acidifying, dewatering and performing vacuum evaporation by spinning to obtain the target product, namely bis(2,4,4-trimethylpentyl) phosphinic acid. Compared with the conventional method, the method has the advantages that: the reaction can be performed smoothly under normal temperature; the reaction time is reduced greatly; the reaction condition is mild; the bis(2,4,4-trimethylpentyl) phosphinic acid yield is high; the technical process is simple; and the like. In the method, the synthesis can be accomplished by one step, so the raw material waste and energy consumption, which are caused by synthesis by multiple steps, are reduced, and cost is reduced.

The present invention provides a novel process for preparation of bisphosphonic acids or salts thereof, e.g. alendronic acid, by reacting a carboxylic acid, phosphorous acid and a halophosphorous compound in a water miscible neutral solvent.

The invention belongs to the field of high-polymer synthesis. The invention discloses a preparation method of a high-cis-content butadiene-isoprene random copolymer, and aims to solve the problems of low cis-content and wide molecular weight distribution in the butadiene-isoprene copolymer in the prior art. The method comprises the following steps: preparing a homogeneous-phase stable organic rare-earth phosphonate catalytic system, wherein the system is mainly composed of a solution-type organic rare-earth phosphonate compound, alkyl aluminum disclosed as general formula AlR3 or AlHR2 or mixture thereof, a halogen-containing compound and conjugated diene; carrying out butadiene-isoprene random copolymerization at proper temperature by using the prepared organic rare-earth phosphonate catalytic system to prepare the high-cis-content butadiene-isoprene copolymer. In the butadiene-isoprene copolymer synthesized by the method, the cis-1,4 bond content of the butadiene chain segment is higher than 97%, and the cis-1,4 bond content of the isoprene chain segment is higher than 98%.

The invention belongs to the technical field of a dispersant, and particularly relates to an acrylic polyester-type hyperdispersant and a preparation method thereof. The acrylic polyester-type hyperdispersant is a polymer obtained from a monomer A, a monomer B and a monomer C by free radicals atactic polymerization, wherein the monomer A is the monomer containing phenyl m-pentadecyl acrylate or derivatives thereof; the monomer B is the monomer containing carboxyl or sulfonic acid or phosphonic acid group; the monomer C is an alkyl (meth)acrylate monomer. The hyperdispersant disclosed by the invention is excellent in dissolving property in an organic medium, the viscosity of a dispersion system can be reduced, the mobility of the dispersion system is improved, and the storage and use performances under a low-temperature condition are good.

The invention provides a process for the production of thermally expandable beads which exhibit a high expansion ratio and give hollow fine particles excellent in the resistance to repeated compression through thermal expansion and application thereof. A process for the production of thermally expandable beads which are each constituted of both a shell made of a thermoplastic resin and a blowing agent that is enveloped in the shell and has a boiling point not higher than the softening point of the thermoplastic resin, which comprises the step of polymerizing a polymerizable component in an aqueous medium where the polymerizable component and the blowing agent are dispersed in the presence of an oxygen-containing aluminum salt and / or a hydrate thereof and at least one water-soluble compoundselected from among polyalkylene imines which have molecular weights of 1000 or above and each bear at least one structure constituted of an alkyl group substituted with a hydrophilic functional group selected from between carboxylic acid (salt) group and phosphonic acid (salt) group and a nitrogen atom attached to the alkyl group.

The present invention relates to a preparation method of a diethyl phosphinate fire retardation agent for a polymer material, wherein the diethyl phosphinate fire retardation agent does not contain monoethyl phosphinate. The preparation method comprises that: hypophosphorous acid and / or hypophosphite, an organic acid and an organic solvent are subjected to a reaction under a condition of ethylene gas introduction, the obtained material and an initiation system formed by an initiator, an auxiliary initiator and an organic solvent are subjected to a reaction to obtain monoethyl hypophosphorous acid-free diethyl hypophosphorous acid and organic acid sodium, and the diethyl hypophosphorous acid, the organic acid sodium and a metal compound are subjected to a reaction to obtain the monoethyl phosphinate-free diethyl phosphinate fire retardation agent. With the preparation method, a hypophosphorous acid and / or hypophosphite conversion rate can be 100%, and the finally obtained diethyl hypophosphorous acid and the salt thereof do not contain the monoethyl hypophosphorous acid group.

Methods to control manganese deposition in an aqueous system, which include introducing a cerium-containing composition, and optionally another deposit control agent, to the aqueous system, are described. Also described, are cerium-containing compositions that promote the manganese stabilization performance of polymeric dispersants and phosphonic acids commonly used in water treatment applications. Cerium-containing compositions that can inhibit the oxidative degradation of deposit control agents are also described.

The present invention provides a non-aqueous electrolyte solution which contains a silyl ester group-containing phosphonic acid derivative.