4 results about "Dimethylbenzylamine" patented technology

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 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.