5 results about "Allyl halides" patented technology

The present application relates to the technical field of adhesive, and discloses a preparation method of a mobile phone low-temperature thermal curing narrow frame sealant, which comprises the following steps: firstly, mixing epoxy resin, fillers and titanate coupling agent, and performing in-situ modification and water removal under the condition of heating and vacuum; then, adding borate ester type inhibitor to perform complex inhibition treatment after temperature reduction; finally, adding ester-free polyether type trifunctional mercaptan, latent curing agent and other additives for dispersion to obtain the sealant. The mercaptan curing agent is prepared by etherification reaction of trimethylolpropane and allyl halide and subsequent photochemical addition reaction, and does not contain ester groups in the molecular structure. The sealant prepared by the present application has excellent low-temperature fast curing capacity and room temperature storage stability, and the curing product has significantly improved resistance to humid heat aging, and is suitable for high-reliability sealing and bonding of mobile phone narrow frame.

This invention relates to the field of polymer materials technology, and discloses a photocurable modified fluorocarbon resin, its preparation method, and its application. The method includes: (1) mixing a hydroxyl-containing fluorocarbon resin with an organic solvent to obtain a resin solution with a concentration of 30-50 wt%; (2) contacting the resin solution with an allyl halide and an acid-binding agent, and carrying out a first reaction under inert gas protection to obtain mixture I; (3) sequentially filtering mixture I to remove inorganic salts, washing to neutrality, dehydrating, and concentrating to obtain a photocurable modified fluorocarbon resin. The photocurable modified fluorocarbon resin provided by this invention is suitable for dual protection processes of UTG acid etching and alkali etching, achieving residue-free peeling, and exhibiting a low Ra value for the UTG surface roughness after peeling. It has advantages such as strong etching resistance, fast curing speed, simple process, and low cost, making it suitable for large-scale production of foldable screen UTG.

This invention relates to the field of organic synthesis, specifically to a method for the in-situ reaction of an α-diazoketone with a Wolff rearrangement to generate an enone, sodium pentafluorophenolate, and an allyl halide, yielding a pentafluorophenol ester, a tertiary carboxylic acid containing a quaternary carbon center. In this invention, under a nitrogen atmosphere, α-diazoketone, tetrakis(triphenylphosphine)palladium, sodium pentafluorophenolate, and an allyl halide are sequentially added to a reaction solvent. The mixture is stirred at 25°C under 15W blue LED illumination until the reaction is complete. After filtration and purification, the pentafluorophenol ester product containing a quaternary carbon center is obtained. The preparation method of this invention is simple to operate (the reactive enone participates in the reaction in situ via the Wolff rearrangement), has high atom economy, mild conditions, and good substrate universality.

The invention provides a synthesis method of carergoline. The synthesis method comprises the following steps: enabling ergolin-8-carboxylic acid methyl ester to react with allyl halide to obtain 6-allyl dihydronorisoergoline methyl ester; the product and N, N-dimethyl-1, 3-propane diamine are subjected to a catalytic reaction, and deethylated carbamoyl carergoline is obtained; the preparation method comprises the following steps: using Boc-anhydride to protect N at the position 4 of a product, and performing catalytic reaction on the product and ethyl isocyanate to generate urea to generate tert-butyl (5R, 8R, 10R)-6-allyl-8-[[[3-(dimethylamino) propyl] [(ethylamino) carbonyl] amino] carbonyl] ergoline-1-carboxylate; the target product carergoline is obtained after the Boc protecting group of the product is removed under the hydrolysis action of hydrochloric acid. According to the method, the required raw materials are cheap and easy to obtain, a palladium catalytic reaction is not needed in the synthesis process, the operation is simple and convenient, industrial production is easy to realize, and the reaction time is short.

The invention relates to the technical field of adhesives, and discloses a preparation method of a mobile phone low-temperature thermocuring narrow frame sealant, which comprises the following steps: mixing epoxy resin, a filler and a titanate coupling agent, and carrying out in-situ modification and water removal under a heating vacuum condition; then cooling and adding a borate inhibitor for complexing inhibition treatment; finally, auxiliaries such as ester-free polyether type trifunctional mercaptan and a latent curing agent are added for dispersion, and the sealant is prepared. Wherein the thiol curing agent is prepared through an etherification reaction of trimethylolpropane and allyl halide and a subsequent photochemical addition reaction, and the molecular structure does not contain ester groups. The sealant prepared by the invention has excellent low-temperature rapid curing capacity and normal-temperature storage stability, the damp-heat aging resistance of a cured product is remarkably improved, and the sealant is suitable for high-reliability sealing and bonding of a narrow frame of a mobile phone.