12 results about "Dimethylbenzylamine" patented technology

The present invention relates to the technical field of benzoxazine resins, and discloses a halogen-free copper-clad laminate substrate material containing flame-retardant modified benzoxazine resin and a preparation method thereof, wherein the present invention utilizes 1,2,4,5-benzenetetramine and phosphorus oxychloride to carry out chlorination reaction to obtain intermediate product 1, and then it is subjected to substitution reaction with p-hydroxybenzaldehyde to obtain intermediate product 2, and the aldehyde group contained therein is subjected to Schiff base reaction with 3-aminophenoxyphthalonitrile to obtain intermediate product 3, and under the catalytic reduction of Raney nickel, phosphorus-containing polyamine is obtained, and finally it is subjected to Manniene reaction with bisphenol A and polyformaldehyde to obtain a flame-retardant modified hyperbranched benzoxazine resin, and finally it is stirred and mixed evenly with E-51 epoxy resin, N, N-dimethylbenzylamine, etc., and coated on glass fiber cloth, and cured to obtain a halogen-free copper-clad laminate substrate material containing flame-retardant modified benzoxazine resin. The halogen-free copper-clad laminate substrate material prepared by the present invention has good flame retardancy, thermal stability and mechanical properties.

A method for extracting and analyzing triazole fungicides using a switchable polarity deep eutectic solvent relates to the field of drinking water and food detection, and includes the following operation steps: a. adding a hydrophobic deep eutectic solvent to a sample solution to obtain a mixed solution A; the deep eutectic solvent is prepared from a hydrogen bond acceptor and a hydrogen bond donor; the hydrogen bond acceptor is one of dipropylamine, triethylamine, N,N-dimethylcyclohexylamine, and N,N-dimethylbenzylamine; the hydrogen bond donor is hexafluoroisopropanol; the molar ratio of the hydrogen bond acceptor to the hydrogen bond donor is (2 to 1):(1 to 5); the volume ratio of the deep eutectic solvent to the sample solution is (0.04 to 0.08):1. This method also avoids the large-scale use of traditional organic solvents, follows the standards of contemporary green analytical chemistry, is sensitive, simple, and environmentally friendly, and is suitable for the detection and analysis of triazole insecticides in drinking water and beverages.

The invention belongs to the technical field of stripping agents, and particularly relates to a slime stripping agent and a preparation method and application thereof. The slime stripping agent disclosed by the invention is prepared from dodecyl dimethyl benzyl amine bromide, dichlorophenol, isothiazolinone, polyoxyethylene alkylolamide, hydroxyethylidene diphosphonic acid, dimethylformamide and sodium dodecyl benzene sulfonate. Through the combined action of the specific components, the slime stripping agent has good stripping capacity and can rapidly permeate and disintegrate slime, dirt and biological membranes attached to the surface of equipment, the cleanliness and operation efficiency of the equipment are recovered, and equipment blockage and performance reduction caused by slime accumulation are effectively avoided; meanwhile, the high killing effect on sulfate reducing bacteria and nitrifying bacteria is achieved.

This invention relates to the field of polymer materials technology, specifically to a modifier for improving the hardness of PC resin and a method for preparing the modified PC resin. The method for preparing the modifier for improving the hardness of PC resin includes the following steps: S1, under nitrogen protection, terephthalic acid, pentaerythritol triacrylate, a catalyst, and a polymerization inhibitor are added to toluene to react and obtain a compound; S2, the compound obtained in step S1 and the polymerization inhibitor are added to acetone and stirred, then nitrogen is introduced, and glycidyl methacrylate and N,N-dimethylbenzylamine are added to react and obtain a product; S3, under nitrogen protection, the product obtained in step S2 is copolymerized with acrylate monomers to obtain the modifier. The modifier prepared by this invention modifies PC resin, resulting in modified PC resin with high hardness and transparency.

The invention discloses lignin-chitosan-based coated vegetable parchment and a preparation method and application thereof.The preparation method comprises the following steps that lignin, succinic anhydride and N, N-dimethyl benzylamine are added into a mixed solution of acetic acid and ethyl alcohol in proportion, and after esterification reaction, a succinic anhydride esterified lignin acetic acid ethyl alcohol mixed solution is obtained; then, chitosan is added into the lignin-chitosan-based coating, and after a reaction, the lignin-chitosan-based coating is obtained; the mass ratio of the lignin to the succinic anhydride to the N, N-dimethyl benzylamine to the chitosan is (0.5-20): (3-15): (0.5-3): (0.1-1); and soaking vegetable parchment in the lignin-chitosan-based coating, taking out, and drying to obtain the lignin-chitosan-based paper. The surface roughness of the coated vegetable parchment can be greatly reduced, the mechanical property of the coated paper can be remarkably enhanced by virtue of a rigid benzene ring structure of lignin, and the fracture stress is improved. Meanwhile, the aromatic ring structure of the lignin endows the coating with excellent hydrophobicity.

The present invention relates to the field of organic synthesis and particularly relates to a method for synthesis of N,N-dimethylbenzylamine. The method comprises the following steps: 1) first-stage reaction: enabling mixed raw material solution I composed of benzyl chloride, aqueous phase II resulting from liquid separation in phase separator V-4, and alkali solution I to react in tube reactor R-1, and collecting a first-stage reaction solution at phase separator V-3 for standing and liquid separation to obtain organic phase I and aqueous phase I, respectively; 2) second-stage reaction: enabling mixed raw material solution II composed of dimethylamine, organic phase I resulting from liquid separation in phase separator V-3, and alkali solution II to react in tube reactor R-2, and collecting a second-stage reaction solution at phase separator V-4 for standing and liquid separation to obtain organic phase II and aqueous phase II, respectively; and 3) post-treatment: distilling organic phase II to obtain N,N-dimethylbenzylamine. The method of the present invention does not involve the use of a catalyst and has the advantages of small wastewater discharge, high product yield, and low production cost.

The present invention belongs to the field of organic synthesis, and specifically relates to a method for synthesizing N,N-dimethylbenzylamine, which comprises the following steps: 1) First-stage reaction: A raw material mixture I composed of benzyl chloride, aqueous phase II obtained by liquid separation in phase separator V-4, and alkali solution I is reacted in a tubular reactor R-1. The first-stage reaction solution is collected at phase separator V-3 for static liquid separation to obtain organic phase I and aqueous phase I respectively; 2) Second-stage reaction: A raw material mixture II composed of dimethylamine, organic phase I obtained by liquid separation in phase separator V-3, and alkali solution II is reacted in a tubular reactor R-2. The second-stage reaction solution is collected at phase separator V-4 for static liquid separation to obtain organic phase II and aqueous phase II respectively; 3) Post-treatment: The organic phase II is distilled to obtain N,N-dimethylbenzylamine. The method of the present invention does not involve the use of a catalyst, and has the advantages of less wastewater discharge, high product yield, and low production cost.

The invention discloses an electrolyte and a secondary battery, wherein the electrolyte comprises an organic solvent, a lithium salt and an additive; wherein the additive comprises an additive A, wherein the additive A comprises a mixed additive generated by the reaction of an anhydrous acidic additive and an organic base; the anhydrous acidic additive comprises at least one of sulfur dioxide, carbon dioxide and sulfur trioxide; the organic base comprises at least one of (4-(dimethylamino)phenylvinyl)pyridine, N,N-diethylpropargylamine, dimethylthioformamide, N,N-dimethylbenzylamine and N,N-dimethylbenzamide, and the pH value of the additive A is neutral. Compared with the prior art, the additive in the electrolyte of the invention can promote the formation of a good SEI film, improve the cycle performance and safety performance of the battery at different ambient temperatures, and reduce the cost of purchasing additives for the electrolyte.

The invention relates to the technical field of oilfield chemistry, in particular to an ionic liquid clay stabilizer and a preparation method thereof.The ionic liquid clay stabilizer is prepared according to the following steps that firstly, allyltrimethylammonium chloride and polyethylene glycol with the required amount are mixed, heated and evenly dissolved, and first ionic liquid is obtained; 2, sequentially adding N, N-dimethyl benzylamine and chloropropene into the ionic liquid I, and reacting to obtain ionic liquid II; and 3, adding an initiator into the ionic liquid II, and continuously reacting to obtain the ionic liquid clay stabilizer. The ionic liquid clay stabilizer disclosed by the invention contains temperature-resistant hydrophobic groups, is high in charge density and remarkable in clay expansion prevention effect, has the characteristics of high temperature resistance and strong washing resistance, and can meet the requirements of ultra-deep and ultra-deep oil and gas resource development.

This invention provides an adhesion promoter for optical fiber coatings, its preparation method, and its application. The optical fiber coating adhesion promoter comprises the following components in parts by weight: 20-25 parts modified epoxy resin, 4-7 parts epoxy acrylate, 12-16 parts modified filler, 32-38 parts propylene glycol methyl ether acetate, 13-18 parts isobutanol, 6-10 parts phosphoric acid, and 5-7 parts water. The preparation method of the modified epoxy resin is as follows: (1) Under a nitrogen atmosphere, the epoxy resin is heated to 135-140°C, and then N,N-dimethylbenzylamine is added. After holding at this temperature for 8-10 hours, a polyepoxy compound is obtained; (2) N-methylethanolamine and amino-terminated liquid nitrile rubber are added sequentially to the polyepoxy compound. After reacting at 125-130°C for 6-8 hours, the mixture is cooled to room temperature to obtain the modified epoxy resin. The optical fiber coating adhesion promoter of this invention can improve the adhesion between the optical fiber and the coating, thereby enhancing the reliability of the optical fiber.

The application belongs to the technical field of polyurethane, and particularly relates to a combined polyether for fireproof and heat-insulating rolling shutter door, polyurethane foam, raw material composition and preparation method thereof. The combined polyether for fireproof and heat-insulating rolling shutter door comprises the following raw materials in parts by weight: polyether polyol A 55-65 parts, polyether polyol B 35-45 parts, foam stabilizer 2-3 parts, catalyst 2-4 parts, chemical foaming agent 4-5 parts, bisphenol A-bis(diphenyl phosphate) 18-23 parts, and the catalyst is a composite catalyst of N, N-dimethylcyclohexylamine, N, N-dimethylbenzylamine, XR Cat 215 and JXP 508. The polyurethane foam made of the combined polyether improves the dimensional stability, oxygen index and thermal conductivity of the door, has good heat-insulating performance, corrosion resistance and mildew resistance, achieves the effect of fireproof and heat-insulating, and has the advantage of zero pollution by using water as the foaming agent.

The present invention belongs to the field of oil production technology, and in particular to a kind of high-efficiency crude oil desulfurizer and its synthesis method and application. The synthesis method is as follows: cyanuric chloride and an alkaline organic solvent are added to a reactor, the temperature is lowered to below 20 DEG C, N, N dimethylbenzylamine is added, pH 9-10 is adjusted with sodium hydroxide solution, and the reaction is kept warm; the above-mentioned mixed solution is added to N-hydroxyethylpiperazine, heated to reflux, and pH 9-10 is maintained with sodium hydroxide solution during the reaction; the above-mentioned mixed solution is vacuum distilled to obtain a viscous solid, and the product desulfurizer is obtained by recrystallization with ethyl acetate. The desulfurizer of the present invention has the advantages that the raw material source is wide, the synthesis process is simple, the process is clean and pollution-free, and the sterilization and desulfurization effect is good.