12 results about "Aminal" patented technology

A mixture of methylene diphenylamine isomers and polymethylene polyaniline is prepared with a controllable ratio of methylene diphenylamine isomers. Aniline and formaldehyde are reacted to produce N,N'-diphenylmethylenediamine (acetalamine), which is then partially rearranged in the presence of a heterogeneous catalyst to a mixture of aminobenzylaniline and methylene diphenylamine isomers. Further rearrangement is performed in the presence of a homogeneous catalyst to convert the remaining aminobenzylaniline isomers to methylene diphenylamine and polymethylene polyaniline.

The invention discloses a synthetic method of hemiacetal amine ester, which comprises the following route I: reacting an amide N-OTs compound a with acetate in an organic solvent to generate a target compound b; a route II is as follows: in an organic solvent, under the action of alkali, the amide N-OTs compound a reacts with a carboxylic acid compound c to generate a target compound d. The method has the advantages that the operation is simple, the raw materials are easy to obtain, the cost is low, the toxicity is low, the compatibility is strong, the product structure is diversified, the reaction condition is mild, the large-scale production is easy to realize and the like, and the method has important significance on rapid synthesis and application of hemiacetal amine ester compounds.

A cyclic aminal – functional organosilicon compound and method for preparation thereof are provided. The cyclic aminal – functional organosilicon compound may be used as an additive in a curable siloxane composition.

A mixture of methylenedianiline isomers and polymethylenepolyaniline is produced at a controlled ratio of methylenedianiline isomers. Aniline and formaldehyde are reacted to produce N,N'-diphenylmethylene diamine (aldolamine), which is then partially rearranged in the presence of a Lewis acid-modified clay catalyst into a mixture of aminobenzylaniline isomers and methylenedianiline isomers. Further rearrangement is performed in the presence of a homogeneous catalyst to convert remaining aminobenzylaniline isomers to methylenedianiline and polymethylenepolyaniline.

The application provides a high-strength high-thermoplastic-temperature polysiloxane polyurea thermoplastic elastomer containing a dynamic acetal amine bond and a preparation method thereof. The application uses diisocyanate and macromolecular polydimethylsiloxane copolymer as a soft segment, diisocyanate and 1,3-bis(3-aminopropyl)tetramethyldisiloxane copolymer as a hard segment, and a polyhydroxy compound containing a dynamic acetal amine bond as a crosslinking agent, so that the prepared elastomer has good mechanical properties and a high thermoplastic temperature and can be repeatedly processed; the preparation process is simple and feasible, the product has stable performance and good reproducibility, and is suitable for popularization and application.

The present invention discloses a degradable glycidylamine epoxy resin containing an aminal structure and a preparation method thereof. The degradable glycidylamine epoxy resin containing an aminal structure has the following molecular structure formula: #imgabs0# wherein R1 and R2 are one of an alkyl group, a cycloalkyl group, a heterocyclic group, a heterocycloalkyl group, an aromatic group, and a heteroaromatic group. The present invention introduces the aminal structure into the epoxy resin cross-linked structure through a cross-linking and curing reaction. The aminal synthesis is simple and green, and the nitrogen heterocyclic hexahydropyrimidine structure of the epoxy resin gives it high mechanical properties and thermal stability. It can be degraded under acidic conditions and still maintains a certain degree of stability under normal temperature and low-concentration acidic conditions. This has significant economic and environmental advantages for the recycling and reuse of thermosetting resins.

The application provides a preparation method of diphenylmethane series diamines and polyamines. In the preparation method of the diphenylmethane series diamines and polyamines, a solid acid catalyst with an acid amount greater than 1.3 mmol / g is used as a catalyst for an aminal transposition rearrangement reaction, the selectivity of the solid acid catalyst in the aminal transposition rearrangement reaction can be significantly improved, the content of tricyclic untransposed substances in the diphenylmethane series diamines and polyamines is reduced, and then high-quality diphenylmethane diisocyanate is obtained.

The present application provides a kind of nitrogen-rich oxygen-rich microporous polyamide for iodine and rhodamine B adsorption, preparation method and application.Nitrogen-rich oxygen-rich microporous polyamide is prepared by cheap melamine and benzoic acid derivatives through aminal reaction.The polyamide prepared by the present application is a new type of amorphous microporous polymer, which is synthesized by solvent thermal method in one step without catalyst.The polymer has the advantages of simple synthesis process, nitrogen-rich oxygen-rich and adjustable content, large specific surface area, strong adsorption capacity for iodine and rhodamine B, etc., and can be applied to the field of environmental governance such as removal and recovery of radionuclide iodine and organic dye pollutants rhodamine B in water system.

The application provides a kind of functionalized porous polyoxamide with alkane chain, preparation method and application.Functionalized porous polyoxamide with alkane chain is formed by polyvinyl triazine diamine (PVDAT) and cheap and easily available formic acid, oxalic acid, formamide, formylhydrazine and N, N-dimethylformamide functional monomer through oxamide polymerization reaction, the functionalized polyoxamide prepared by the application has large specific surface area and rich amino and hydroxyl functional groups, and the porous polymer skeleton also contains fatty long chain, and has good application prospect in the field of organic hydrocarbon gas adsorption separation and recovery of radioactive iodine element.

The present invention relates to a preparation method of an aminal retanning agent based on chrome-free tanning, wherein glyoxylic acid and ethylene glycol are added to benzene, heated, stirred, p-toluenesulfonic acid is added, cooled, and the solvent and catalyst are removed by rotary evaporation to obtain an activated glyoxylic acid precursor, and the activated glyoxylic acid precursor is dissolved in thionyl chloride, 3 parts of N, N-dimethylformamide are added, and the activated glyoxylic acid is obtained by rotary evaporation; mellitic acid and pentaerythritol are mixed uniformly, 5-20 parts of concentrated sulfuric acid are added, and the activated glyoxylic acid is added by rotary evaporation, mixed uniformly and heated, concentrated sulfuric acid is added, water is added, and pH is adjusted to obtain an aminal retanning agent based on chrome-free tanning. The aminal retanning agent based on chrome-free tanning of the present application has a relatively suitable particle size and dispersibility, and can promote the adsorption and combination of skin collagen fibers to subsequent retanning, filling, and dyeing materials.

The invention relates to a production method for on-line regulation and control of MDA product composition and a production method of MDI. The production method comprises the following steps: formaldehyde and aniline are subjected to a synthesis reaction in a synthesis device to obtain an aminal reaction solution, the aminal reaction solution and hydrochloric acid are subjected to a condensation reaction in a condensation device to obtain a crude product, and the crude product is subjected to post-treatment to obtain an MDA product; wherein when the MDA product is used for preparing the MDI product, the mass ratio F of the bicyclic MDI in the MDI product meets the following relational expression; the mass fraction w of aniline in the crude product is detected on line, and the following relational expression is met, x is the molar ratio of formaldehyde to aniline during feeding, and y is the molar ratio of hydrochloric acid to aniline; ; in the production process, p2 is controlled to be equal to (0.98-1.02) p1, so that the proportion of bicyclic MDA in the MDA product can be controlled online in continuous production, and bicyclic MDI and polymerized MDI with an expected proportion can be obtained when the obtained MDA product is used for preparing MDI.

The invention discloses a synthesis method for direct aminomethylation of a benzyl C-H bond of a quinoline compound. The method comprises the following steps: dissolving a quinoline compound and an organic matter capable of generating imine positive ions in a solvent, and reacting under an acidic condition to obtain an aminomethylated derivative of a quinoline benzyl C (sp3)-H bond; the structural formula of the quinoline compound is shown in the specification. R1 is a cyano group, a nitro group, an aromatic ring with or without a substituent group, and a benzoaromatic ring with or without a substituent group; r2 is hydroxyl, alkyl, ester group or aryl. The organic matter capable of generating imine positive ions is aminal or N, N-dimethyl methylene ammonium iodide; the structural formula of the aminal is shown in the specification, and R3 and R4 are both benzyl. According to the invention, organic acid-induced C (sp3)-H bond activation of quinoline benzyl under the condition of no transition metal catalysis is creatively realized, the preparation method disclosed by the invention is rapid, efficient, simple and mild in condition, and a large number of quinoline amine methylated derivatives can be rapidly synthesized and are used for antitumor activity research.