31 results about "Aminomethylphosphonic acid" patented technology

Bond strength of a composite resin, an adhesive resin cement or the like to dentin or enamel of tooth is remarkably improved by treating the dentin or the enamel with a self-etching primer agent comprising an aqueous solution of a methacrylic acid derivative such as N-methacryloylglycin, N-methacryloyl-3-aminopropionic acid, N-methacryloyl-4-aminobutyric acid, N-methacryloyl-5-aminovaleric acid, N-methacryloyl-6-aminocaproic acid, N-methacryloyl-2-aminomethylphosphonic acid, N-methacryloyl-3-aminoethyl-phosphonic acid and N-methacryloyl-4-aminopropylphosphonic acid.

The cross-linked polyphosphonate-sulfone composition for removal of metal ions from wastewater relates to a cross-linked anionic polyelectrolyte polymer for the removal of metal ions, such as lead (Pb2+) and copper (Cu2+) ions, from wastewater and the like. The cross-linked anionic polyelectrolyte polymer has the formula:The cross-linked anionic polyelectrolyte polymer is made by cyclopolymerization of diallylaminomethylphosphonic acid, 1,1,4,4-tetraallylpiperazinium dichloride (a cross-linker), and sulfur dioxide in the presence of AIBN (an initiator) in DMSO at 65° C. to form a cross-linked polyzwitterionic acid (CPZA). The CPZA is then treated with base (such as sodium hydroxide) to form the cross-linked anionic polyelectrolyte polymer having the formula shown above.

N-phosphonomethylamines are produced by reaction of an amine substrate with a halomethylphosphonic acid or salt thereof, a hydroxymethylphosphonic acid or salt thereof, or a dehydrated self-ester dimer, trimer or oligomer of hydroxymethylphosphonic acid. Among the products that may be prepared according to the process are N-phosphonomethylaminocarboxylic acids such as (e.g.) glyphosate, N-phosphonomethylaminoalkanols such as (e.g.) hydroxyethlaminomethylphosphonic acid, and N-acylaminomethylphosphonic acids such as (e.g.) N-carbamylaminomethylphosphonic acid. Certain reactions are conducted with a substantial excess of amine reactant in order to drive the conversion while avoiding excessive formation of bis(N-phosphonomethyl)amine by-products. Other reactions use a secondary amine substrate (such as iminodiacetic acid) and can be conducted at substantial equimolar ratios of halomethylaminomethylphosphonic acid or hydroxyaminomethylphosphonic acid to secondary amine reactant without significant formation of bis(phosphonomethyl)amine by-products. Further disclosed is a process for the preparation of hydroxymethylphosphonic acid self-ester dimers, trimers and oligomers by azeotropic dehydration.

The invention discloses a preparation method of glyphosate, which is prepared by reacting disodium salt of aminomethylphosphonic acid and chloroacetate in water; the method avoids the existing iminodiacetic acid method, dialkyl phosphonite The defects in the production of glyphosate by ester method and chloromethyl phosphonic acid method have the characteristics of cleanness, environmental protection and high efficiency. The yield and quality of glyphosate have been significantly improved. It can be recycled, reducing waste liquid discharge, reducing material loss, greatly reducing production costs, and good economic benefits.

The invention relates to a preparation method for an in-situ flame-retardant adhesive coating material. According to the preparation method, liquid polyurethane and a reactive flame retardant N,N-bis(2-ethoxy)dimethyl aminomethylphosphonate are subjected to reactive grafting to form the in-situ flame-retardant adhesive coating material. The material prepared through the method can be directly used for coating of a fabric coating, and after drying, fabric can have a good flame-retardant property.

The invention provides a special solid-phase extraction column for glyphosate and its metabolites and its application. The filler is composed of anion adsorption filler, acid substance adsorption filler and filter aid; the anion adsorption filler is magnesium-aluminum binary water Talc, the molecular composition formula is MgAl3(OH)16CO3·4H2O; the acidic substance adsorption filler is ethylenediamine-N-propylsilane; the filter aid is diatomaceous earth celite? 545 filler; the weight ratio of the anion adsorption filler, acid substance adsorption filler and filter aid is 2:2:1. The special extraction filler for glyphosate and its metabolite aminomethylphosphonic acid provided by this application has strong adsorption capacity and high column capacity, and can effectively remove vegetable oil, fat, acidic substances and other impurities in food, and the recovery rate can reach 90% It is more than %, stable and reproducible, which overcomes the defects of unstable alumina activity and small capacity of anion exchange column in the traditional method.

An improved process for the manufacture of formylphosphonic acid derivatives is reported. An aminomethylphosphonic acid substrate is contacted with a reagent selected from the group consisting of water, an alcohol, a phenol compound, and mixtures thereof and an oxidizing gas in the presence of a catalyst to form a reaction product mixture containing a formylphosphonic acid derivative and the conditions under which said contacting is carried out are controlled so that no more than 50% of the formylphosphonic acid derivative formed in the reaction product mixture is consumed by reaction with the reagent.

The invention relates to a method for detecting the residual quantities of glyphosate and phosphonic acid being a metabolite of glyphosate in food. The method comprises the following steps: preparation of a standard working solution, preparation of a food sample test solution, drawing of a standard working solution regression curve and calculation of the residual quantities of glyphosate and phosphonic acid in a food sample. The method has the advatnages that the residual quantities of glyphosate and phosphonic acid in food can be detected accurately, wherein the detection results are accurate, reliable, and high in reproducibility; a dialysis bag and a divinyl benzene solid phase extraction cartridge are adopted for purification to avoid blockage, ensure 80 percent or high recovery rate, and avoid use of expensive internal standard substances for recovery correction; as an NH2P-502D cartridge is adopted, and 5 mmol / L liquid ammonium acetate and acetonitrile are adopted as mobile phases, the method is excellent in response and peak shape.