34results about How to "Reasonable synthetic route" patented technology

The invention provides a novel weakly cross-linked particle control and displacement agent capable of enhancing oil recovery and a preparation method thereof. The drive control agent is formed by polymerization of acrylamide monomer and composite crosslinking system through an initiator. Its preparation method is: dissolve 100 parts of acrylamide in 200-250 parts of water to make a solution, dissolve 0.2-0.5 parts of dimethylaminoethyl methacrylate in 30-50 parts of water to make a solution, and dissolve 0.0002-0.001 parts of polyethylene Diol diacrylate is dissolved in 20~40 parts of water to form a solution, which is added to the three-necked bottle in turn, and placed in a water bath at 10°C~15°C; after 30 minutes of nitrogen gas, dissolve 0.01-0.03 parts of ammonium persulfate Add the solution prepared in 30~50 parts of water into the three-necked bottle. After the temperature rise of the reaction solution is greater than 1°C, stop the nitrogen flow. After the reaction, put the three-neck bottle into a water bath at 70-85°C to keep warm for 2-6 hours, then take out the gel, cut it into pieces, dry, pulverize, The powdered product can be obtained after sieving.

The invention provides a quatenary core end epoxy hyperbranched polyester and a preparation method thereof, relates to the technical field of composite materials and in particular relates to a toughening agent for fiber composite material matrix resin and a preparation method for the toughening agent. According to the invention, the problems that the hyperbranched polyester serving as the toughening agent of the epoxy resin matrix has single structure, low compatibility with epoxy resin, a complex synthesis process and the like are solved. The structural formula of the quatenary core end epoxy hyperbranched polyester is shown as the specifications. The preparation method comprises the following steps: I, mixing and stirring; II, preparing a hydroxyl-terminated hyperbranched polyester crude product; III, preparing hydroxyl-terminated hyperbranched polyester; IV, preparing an epoxidation solution; V, preparing alkaline liquid; VI, preparing a neutralization solution; and VII, washing and drying to obtain the quatenary core end epoxy hyperbranched polyester. The method is mainly used for preparing the quatenary core end epoxy hyperbranched polyester.

The invention relates to a bis-silicon-bridged dinuclear metallocene compound and preparation and application thereof. The bridged cyclopentadienyl rings of the bis-silicon-bridged dinuclear metallocene compound contain different substituents. Dimethyldichlorosilane reacts with cyclopentadienyl sodium, so that light yellow solution is obtained; the light yellow solution reacts with n-butyl lithium, and dimethyldichlorosilane is then added for reaction, so that bis-silicon-bridged dicyclopentadiene is obtained; the bis-silicon-bridged dicyclopentadiene reacts with n-butyl lithium, halogenide is then added for reaction, n-butyl lithium is then added for reaction, and finally, another halogenide is added for reaction, so that ligand L is obtained; and cyclopentadienyl titanium trichloride orcyclopentadienyl zirconium trichloride or substituetd cyclopentadienyl titanium trichloride or substituetd cyclopentadienyl zirconium trichloride is added in the ligand L, so that the compound is obtained. The synthesis route is reasonable, the yield is high, separation and purification are easy, the amount of needed cocatalysts is less when the compound is used for catalyzing the copolymerization of ethylene, such as ethylene / hexene-1, ethylene / octene-1 and ethylene / decylene, and long-chain Alpha-alkene, the catalytic activity is high, the insertion rate of the long-chain Alpha-alkene is high, and molecular weight distribution is wide.