36results about How to "Molecular weight easy" patented technology

The synthesis and characterization of novel multi-arm, polyisobutylene-based star-block polymers comprising a plurality of polyisobutylene-containing, diblock arms radiating from a siloxane core are described. The synthesis has been achieved by cationically polymerizing a monomer, such as styrene, and isobutylene to form diblock prearms and then hydrosilating the unsaturation-functionalized polyisobutylene with siloxanes carrying a plurality of Si-H groups via hydrosilation. The resultant star-block polymers may be thermoplastic elastomers characterized as having superior tensile strength and processing properties as compared to linear triblock polymers of similar hard/soft segments.

The present invention relates to silicone polymer ligands for binding to quantum dots. The silicone polymer ligands contain a multiplicity of amine, carboxy, and/or phosphine binding groups suitable for attachment to quantum dots. The present invention also describes a process for the preparation of quantum dot binding ligands.

The invention discloses a preparation method for a water-repellent oil-repellent superhydrophobic fabric surface. The preparation method comprises the following steps: (1) weighing a cotton fabric, and preparing a cotton-cellulose macromolecular initiating agent under the action of the initiating agent and a catalyst; (2) grafting monomeric GMA on the prepared cotton-cellulose macromolecular initiating agent, vacuumizing a reaction system and introducing nitrogen, so as to obtain cotton cellulose grafted by the GMA, soaking the cotton cellulose grafted by the GMA in an acid solution, and hydrolyzing epoxy groups to form a cellulose surface rich in hydroxyl groups; and (3) performing acylation reaction between the cotton cellulose grafted by the GMA on the cellulose surface rich in hydroxyl groups and a monomer with low surface energy to obtain the water-repellent oil-repellent superhydrophobic surface. The preparation method is mild in reaction condition, simple, and easy to operate, can be realized at room temperature, and can guarantee the good superhydrophobicity and oil resistance without influencing of the comfort and the mechanical property of the cotton fabric.

The invention discloses a chiral imine phenol oxyl zinc and magnesium compound as well as a preparation method and application thereof to catalyzing lactone to carry out ring opening polymerization. The preparation method comprises the following steps: directly enabling a neutral ligand to react with a metal raw material compound in an organic medium; then carrying out steps of filtering, pumping and re-crystallizing to obtain a target compound. The chiral imine phenol oxyl zinc and magnesium compound is an efficient lactone ring opening polymerization catalyst and can be used for polymerization reactions of catalytic lactide, epsilon-caprolactone and the like; particularly, polylactic acid with high miscellaneous normal degree can be obtained aiming at racemized lactide. The chiral imine phenol oxyl zinc and magnesium compound disclosed by the invention has the very obvious advantages that raw materials are easily available, a synthetic route is simple and the yield of a target product is high; the chiral imine phenol oxyl zinc and magnesium compound has high catalytic activity; polylactide with high molecular weight and narrow molecular weight distribution can be obtained and the requirements of industrial departments can be met. The structural formula is as shown in the specification.

The invention discloses an imine phenol oxymagnesium compound, a preparation method and application thereof in catalyzing lactone ring opening polymerization. The preparation method comprises the following steps of: enabling neutral ligands to directly react with magnesium amide in methylbenzene, and then conducting filtration, concentration and recrystallization to obtain target compounds from reaction products. The imine phenol oxymagnesium compound provided by the invention is a high-efficiency catalyst for lactone ring opening polymerization, and can be used for polymerization of lactide, epsilon-caprolactone and the like. The imine phenol oxymagnesium compound provided by the invention has very remarkable advantages that the raw materials are easy to obtain, the synthesis line is simple, the product yield is high, the property is comparatively stable, the catalytic activity is higher, high-molecular-weight polylactide and polycaprolactone can be obtained, and the needs of industrial departments can be met. The structural formula of the imine phenol oxymagnesium compounds is shown as the accompanying drawing.

The invention relates to a polyimide fiber spinning solution based on 2, 2-double [4-(2, 4-diaminophenoxy) phenyl group] hexafluoropropane and a preparation method thereof. The structural formula of components of the spinning solution is shown as below. The preparation method includes adding the 2, 2-double [4-(2, 4-diaminophenoxy) phenyl group] hexafluoropropane and a high-polar aprotic organic solvent into a reaction kettle, stirring for dissolution at the room temperature, adding phthalic anhydride, stirring for reaction for half an hour, cooling until the temperature is under 5 DEG C through an ice-water bath, adding 3, 3', 4, 4'-tetracarboxy benzophenone dianhydride, stirring for reaction for half an hour, adding pyromellitic dianhydride, maintaining the reaction temperature under 5 DEG C, and obtaining the solution after stirring for reaction for 2-4 hours. The polyimide fiber spinning solution based on the 2, 2-double [4-(2, 4-diaminophenoxy) phenyl group] hexafluoropropane and the preparation method thereof have the advantages that molecular weight of resin is easy to control, molecular structure is easy to regulate, preparation of high-performance polyimide fibers is facilitated, reaction condition of the preparation method is mild, and industrialization of products is facilitated.

The invention relates to a preparation method of paclitaxel nano micelle, which comprises the following steps of: taking a block copolymer of polyether and polyester as a medicine supplementary material and paclitaxel as a medicine; and preparing the paclitaxel nano micelle by rotating an evaporation solvent, wherein the medicine supplementary material is prepared through body ring-opening polymerization, and the terminal hydroxyl group of the copolymer is modified into carboxylate so as to increase the stability of the micelle. According to the micelle disclosed by the invention, during the preparation process, no stabilizing agent is added, and the obtained medicine-carrying micelle can stably exist for over 48h under the body fluid environment, is a paclitaxel nano sustained-release carrier with a good application prospect, and has the characteristics of stability and tumour targeted effect.

The invention relates to a polyimide fiber spinning stock solution based on 2,2-bis[4-(2,4-diaminophenoxy) phenyl] propane and a preparation method thereof. The spinning stock solution has a structural formula shown in the specification. The preparation method comprises the following steps of: adding 2,2-bis[4-(2,4-diaminophenoxy) phenyl] propane and a high-polarity aprotic solvent into a reaction kettle, and dissolving with stirring at room temperature; adding phthalic anhydride, reacting with stirring for 0.5 hour, and cooling to the temperature of 5 DEG C in ice-water bath; adding 3,3',4,4'-tetracarboxylicdiphenyl ether dianhydride, and reacting with stirring for 0.5 hour; and adding pyromellitic dianhydride, keeping the reaction temperature below 5 DEG C, and reacting with stirring for 2 to 4 hours to obtain the polyimide fiber spinning stock solution. According to the polyimide fiber spinning stock solution, the molecular weight of resin is easy to control, a molecular structure is easy to adjust, and high-performance polyimide fibers with ideal performance are easy to prepare; and according to the preparation method, reaction conditions are mild, and the industrialization of products is facilitated.

A production process of a polymerization catalyst component includes contacting compound (a) such as diethyl zinc represented by the defined formula [1], a compound (b) such as pentafluorophenol, represented by the defined formula [2], a compound (c) such as water, represented by the defined formula [3], and particles (d), such as silica, with one another in a hydrocarbon solvent under an agitator power of 0.05 kW/m³ or greater.

The present invention provides a method for confirming existence of a phosphoric acid monoester compound (peptide, saccharine and the like) and easily identifying the molecular weight thereof even among biological samples including a plurality of compounds, and an additive for a mass spectrometry used for the method. In the method according to the present invention, a complex compound exhibiting extremely high coordination ability to a phosphoric acid monoester group and configured of single kind of zinc isotopes is used to obtain a plurality of mass spectrum data, and then the data are compared.

The invention provides a high-performance water-based industrial anticorrosive paint. The high-performance water-based industrial anticorrosive paint comprises the following components in parts by weight: 35-50 parts of epoxy ester resin, 7-9 parts of acrylic emulsion, 4-6 parts of cosolvent, 25-35 parts of pigment and filler, 8-16 parts of antirust pigment, 0.1-0.5 part of anti-settling agent, 0.1-0.5 part of dispersing agent, 0.1-0.5 part of defoaming agent, 0.2-1.0 part of dryer, 0.1-0.5 part of leveling agent and 15-25 parts of emulsifying water. The high-performance water-based industrial anticorrosive paint is high in solid content, low in volatile organic compound (VOC) content, favorable in adhesion, excellent in recoatability and favorable in chemical resistance, water resistance and salt mist resistance, and causes less environmental pollution. According to the invention, by using the specially designed epoxy ester resin and the preferable weather-resistant pigment and antirust pigment, a paint film has more excellent comprehensive properties such as fullness, adhesion, salt mist resistance, chemical resistance and the like, and especially, the salt mist resistance is greatly improved as compared with the existing epoxy ester resin.

The invention discloses a preparation method of hemoglobin polypeptide powder, comprising: preparing hemoglobin, preparing an enzymatic hydrolysis solution and preparing polypeptide powder. The preparation method has the advantages that the preparation method disclosed herein is simple, and the prepared polypeptide has low molecular weight and high purity, can be easily absorbed by human bodies, is suitable for direct use and has significant economic benefit.

The invention discloses a biphenyl skeleton chiral amino phenol oxyl dual-core zinc-magnesium compound and a preparation method thereof and application of the compound in lactone ring opening polymerization catalyzing. The preparation method of the compound comprises the following steps that a neutral ligand directly reacts with a metal raw material compound in an organic medium, and then filtration and extraction are performed to obtain the target compound. The biphenyl skeleton chiral amino phenol oxyl dual-core zinc-magnesium compound is an efficient lactone ring opening polymerization catalyst and can be used for catalyzing a polymerization reaction of lactones such as lactide and particularly can be used for racemizing the lactide to obtain polylactic acid with the higher isotacticity degree. The biphenyl skeleton chiral amino phenol oxyl dual-core zinc-magnesium compound has the very obvious advantages that the raw materials are easy to obtain, the synthesis route is simple, the product yield is high, the higher catalytic activity and stereoselectivity are achieved, the polyester material with the higher isotacticity degree and the high molecular weight can be obtained, and the requirements of an industrial department can be met. The structural formula of the biphenyl skeleton chiral amino phenol oxyl dual-core zinc-magnesium compound is as followed (please see the structural formula in the specification).

The invention discloses transparent polystyrene with the capacity scale of 50,000 tons or above as well as production equipment and process of the transparent polystyrene. The main component of the obtained transparent polystyrene product is as follows: n is the degree of polymerization, and the range of the n is 600-7000, and the n is different along with different types of products. The transparent polystyrene has good transparency, the Vicat softening point is 85-106 DEG C, the tensile strength of the transparent polystyrene is 40-55 Mpa at normal temperature, and the transparent polystyrene is a thermoplastic material. The molecular structure contains a small amount of macromolecules with a special structure, and a considerable amount of hydrocarbon micromolecules are contained in gaps of the macromolecules, so that certain slippage can be generated among the macromolecules, and the material has good transparency and mechanical properties compared with products obtained by other process production methods. The process waste water is basically not generated in the production process, all the raw materials are recycled, a small amount of generated process waste gas reaches the standard and is discharged after being condensed and adsorbed by special equipment, and good environment-friendly, energy-saving and consumption-reducing effects can be achieved.

The invention provides a process method and device for extracting pea albumin from water. The process method comprises the following steps: the waste water is prepared and poured into a centrifuge, and finally first clear liquid is obtained; the first clear liquid is concentrated through a first concentration membrane to form two substances of first concentrated liquid and first clear water; saccharides in the first concentrated liquid are separated out through an ultrafiltration membrane, and second clear liquid and interception liquid are formed; then the interception liquid is concentratedthrough a second concentration membrane to form second concentrated liquid and second clear water; a pressure circulation assembly simultaneously further changes the air pressure intensity of the bottom of a reverse osmosis membrane, and the air pressure intensity of the bottom end of the second concentration membrane; and the second concentrated liquid is subjected to compatibility drying to obtain pea protein powder. According to the process method and device for extracting the pea albumin from the water, the technical problem of how to extract pea protein from the waste water is solved, water resources are saved, and the added value of water resource utilization is increased.

The present invention relates to a method for preparing polyamides by anionic polymerization, and to polyamides prepared by the method. According to the preparation method of the polyamide provided by the embodiment of the invention, the polyamide with ultra-high molecular weight can be easily prepared. In addition, the ultra-high molecular weight polyamide according to the specific embodiment of the present invention has excellent mechanical properties, particularly impact strength. Therefore, the ultra-high molecular weight polyamide according to the specific embodiment of the present invention can be effectively applied to materials for vehicles, electronic equipment materials, industrial pipe materials, construction civil materials, 3D printer materials, fiber materials, coating materials, machine tool materials, medical materials, aeronautical materials, solar materials, battery materials, sports materials, home appliance materials, and the like. Component materials including household materials and cosmetic materials.

A polishing pad has a polishing layer including a non-foamed polyurethane, wherein the non-foamed polyurethane is a reaction cured body of a polyurethane raw material composition containing an isocyanate-terminated prepolymer obtained by reacting a prepolymer raw material composition containing a diisocyanate, a high-molecular-weight polyol and a low-molecular-weight polyol; an isocyanate modified body polymerized by adding three or more diisocyanates; and a chain extender, and the addition amount of the isocyanate-modified body is 5 to 30 parts by weight with respect to 100 parts by weight of the isocyanate-terminated prepolymer. The polishing pad hardly causes scratches on the surface of an object to be polished and has an improved dressing property.

Provided is a method for producing a polymer, characterized by reacting (A) an epoxy compound having two or more epoxy groups in the molecule with (B) a reactive compound having, in the molecule, two or more functional groups reactive with epoxy groups, in the presence of (C) a polymerization catalyst and (D) a cocatalyst.

The invention provides a novel TRAIL fusion protein, which belongs to the field of biotechnology. The novel TRAIL fusion protein contains a third loop sequence of TGF-alpha and has strong specific tumor killing effect. The invention also discloses a coding gene of the TRAIL fusion protein and an expression pathway thereof, a production method for the fusion protein and application of the fusion protein in treatment of diseases like tumors.