34 results about "1-benzofuran" patented technology

The invention discloses EVA hot melt adhesive for book binding.The EVA hot melt adhesive is characterized by at least being prepared from, by weight, 100 parts of EVA resin, 1-7 parts of vinyl benzene fused-heterocycle mixture, 15-40 parts of tackifier, 10-20 parts of a viscosity conditioning agent, 0.01-0.5 part of antioxidant, 0.05-0.5 part of initiator and 20-50 parts of filler.The vinyl benzene fused-heterocycle mixture includes a vinyl benzene fused-heterocycle compound, a sulfonated vinyl benzene fused-heterocycle compound and an acylated benzene fused-heterocycle compound, and the vinyl benzene fused-heterocycle compound is selected from 2-vinyl-1-benzofuran or 2-vinyl-1-benzothiophene.

The invention discloses an EVA hot-melt adhesive for refrigerator sealing. The EVA hot-melt adhesive for refrigerator sealing is prepared from, by weight, 100 parts of EVA resin, 1-4 parts of a vinyl fused ring mixture, 30-50 parts of a tackifier, 10-15 parts of a viscosity modifier, 0.2-1 part of an antioxidant, 0.1-0.5 part of an initiator and 20-30 parts of filler, wherein the vinyl fused ring mixture is prepared from an acylated vinyl fused ring compound and a non-acylated vinyl fused ring compound, and the vinyl fused ring compounds are selected from 2-vinyl-1-benzofuran and 2-vinyl-1-benzothiophene.

The invention relates to a sealing material, in particular to long-lasting, high-humidity and mold-proof silicone sealant. The long-lasting, high-humidity, mold-proof silicone sealant is prepared from the following raw materials: alpha-hydro-omega-hydroxy-polydimethylsiloxane, 6-(beta-D-glucopyranosyl-oxy)-7-hydroxy-2H-1-benzofuran-2-one, (1,3,4,5,6,7-hexahydro-1,3-dioxo-2H-isoindol-2-yl)methyl (1R-trans)-2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropanecarboxylate, trimethyl[(1-methyl-ethenyl)oxy]-silane, 2-ethylhexyl 4-methoxycinnamate, and the like. The long-lasting, high-humidity and mold-proof silicone sealant is good in mold-proof performance, relatively long in storage time, simple in preparation method, relatively short in surface drying time, shortened in work time, improved in work efficiency, and free of yellowing, and is suitable for promotion and application in the field of mold-proof silicone sealant.

The present invention is directed to crystalline forms of the 5-HT2C agonist {[(2R)-7-(2,6-dichlorophenyl)-5-fluoro-2,3-dihydro-1-benzofuran-2-yl]methyl}amine hydrochloride, as well as compositions, processes of preparation, and uses thereof.

The invention relates to a synthesis method of 2,3-dihydro-1-benzofuran-4-carbaldehyde. The formula of 2,3-dihydro-1-benzofuran-4-carbaldehyde can be shown in the formula (I). The synthesis method comprises the steps of making a compound shown in the formula (II) be subjected to intramolecular cyclization reaction so as to produce a compound shown in the formula (III) under the existence of alkali metal compounds and Cu(1); making the compound shown in the formula (III) be subjected to reaction together with magnesium and a compound shown in the formula R3CONR1R2(IV) so as to obtain the compound shown in the formula (I). According to the synthesis method of 2,3-dihydro-1-benzofuran-4-carbaldehyde, reaction conditions are mild, procedures are simple, byproducts are few, and thus the synthesis method of 2,3-dihydro-1-benzofuran-4-carbaldehyde is suitable for being applied to large scale industrial production.

An EVA hot melt adhesive for a storage battery is at least prepared from, by weight, 100 parts of EVA resin, 5-10 parts of a vinyl condensed ring mixture, 2-5 parts of alpha-olefin containing an aromatic ring substituent group, 20-40 parts of tackifier, 12-18 parts of a viscosity modifier, 0.01-0.5 part of an antioxidant, 0.05-0.2 part of an initiating agent and 30-40 parts of packing, wherein the vinyl condensed ring mixture comprises an acylated vinyl condensed ring compound and an non-acylated vinyl condensed ring compound, the vinyl condensed ring compound is selected from 2-vinyl-1-benzofuran or 2-vinyl-1-benzothiophene, and the aromatic ring substituent group contains elemental sulphur.