368 results about "Cyclohexylamines" patented technology

The invention relates to a solar polyurethane thermal insulation material which belongs to the technical field of solar thermal insulation materials. MDI (methyl diphenylene diisocyanate) containing 30-32wt% of NCO (isocyanate group) is mixed with full-water combined polyether according to a weight ratio of 1.294:1, thereby acquiring the solar polyurethane thermal insulation material. The full-water combined polyether comprises bio-polyether polyol, deionized water, sorbierite polyether, cane sugar polyether, foam evening agent and catalyst, wherein the molecular weight distribution of the bio-polyether polyol is 1000-1200; a hydroxyl value is 490mgKOH / g; a viscosity at 25 DEG C is 3600mPa.s; the foam evening agent is polyether modified organic siloxane; and the catalyst is N,N-dimethyl cyclohexane. The solar polyurethane thermal insulation material has the advantages that the preparation process is simple, the operation is convenient and the automatic continuous production is realized; the environment is protected, an ODP (Ozone Damaging Potential) value is zero and the toxic side effect does not exist; and the phenomena of contraction, transformation and expansion at normal temperature, 100 DEG C or 25 DEG C are avoided, the size stability is high, the strength is high, the brittleness is small and the heat-conducting coefficient is small.

The invention discloses a method for synthesizing enantiomorphous pure symmetric trans-dialkyl cyclohexylamine, belonging to the field of chemistry. The method comprises the following steps of: carrying out an airtight or reflux reaction on cyclohexene oxide and an aqueous solution of alkylamine for reacting at 80-120 DEG C for 1.5-5h to obtain 2-alkyl-amino cyclohexanol, dropwise adding DEAD (Diethyl Azodicarboxylate) or DIAD (Diisopropyl Azodicarboxylate) to triphenylphosphine, 2-alkyl-amino cyclohexanol and a solvent under an ice bath for reacting for 5-20h at room temperature to obtain N-alkyl-7-azabicyclo[4, 1, 0]heptane, adding a catalyst to the N-alkyl-7-azabicyclo[4, 1, 0]heptane and the aqueous solution of alkylamine at 100-120 DEG C to carry out the airtight or reflux reaction to obtain trans-N,N'-dialkyl-1,2 cyclohexanamine, dissolving the trans-N,N'-dialkyl-1,2 cyclohexanamine in an alcoholic solvent, and adding a tartaric acid type resolving agent with the equivalent weight of 0.5 to the alcoholic solvent to resolve so as to obtain the enantiomorphous pure symmetric trans-dialkyl cyclohexylamine.