64results about How to "Enhanced steric effect" patented technology

The invention provides a method for preparing a water-coal-slurry additive taking enzymatic hydrolysis lignin as a raw material. In the method, the chemical activity of the enzymatic hydrolysis lignin is utilized to directly perform polycondensation with sodium hydrogen sulfite, sodium metabisulfite, acetone and methanal to a prepare enzymatic hydrolysis lignin-sulphonated acetone-methanal condensation polymer (LSAF); the enzymatic hydrolysis lignin-sulphonated acetone-methanal condensation polymer (LSAF) is compatible with other types of surfactants, and is compounded with the surfactants, such as sodium dodecyl benzene sulfonate, PVA, carboxymethyl cellulose sodium and the like to prepare the water coat slurry which has higher stability and lower viscosity; and the liquidity of the water coat slurry is improved. The enzymatic hydrolysis lignin replaces the partial petrochemical raw materials to prepare modified high molecular materials, which not only lowers the cost of high molecular materials, but also can save the consumption of the petrochemical materials, and can generate significant social benefit; and the processing technique for preparing the water-coal-slurry additive taking the enzymatic hydrolysis lignin as a raw material is simple, is easy to implement and has good effect.

The invention provides a modified sulfamate efficient water reducer and a preparation method thereof, particularly relates to a dinaphthol waste modified sulfamate efficient water reducer and relates to the technical field of waste treatment. The reducer comprises raw materials of, by weight, 120 parts to 130 parts of sodium sulfanilate, 400 parts of dinaphthol waste, 95 parts of phenol, 170 parts of formaldehyde, 25 parts of liquid caustic soda (30%), 30 parts to 50 parts of urea, 1 part to 10 parts of dodecyl diphenyl ether sodium disulfonate and 180 parts to 260 parts of water. By means of the water reducer and the preparation method thereof, dinaphthol waste recycling is achieved, waste water are not needed to be subjected to concentration or any other treatment of physical chemical treatment and the like, energy consumption is saved, and pollution and damage of the waste to the environment and humans are prevented.

The invention discloses a method for preparing valganciclovir hydrochloride I. The method comprises the following steps of: 1, dissolving phosphorus oxychloride into an inert solvent, and performing a reaction of the mixture and the alcoholic liquor to obtain phosphoryl halide II; 2, performing a reaction of ganciclovir and the phosphoryl halide II obtained in the step to obtain ganciclovir monoester III; 3, esterfying the ganciclovir monoester III in the step 2 and N-carbobenzoxy-L-valine to obtain ganciclovir diester IV; 4, acidizing the ganciclovir diester IV in the step 3 for dephosphorylation to obtain N-carbobenzoxy-L-valine ganciclovir monoester V; and 5, performing a hydrogenation reaction on the product in the step 4 to prepare the valganciclovir hydrochloride I. By the method, the ganciclovir monoester with high purity and yield can be produced, the post-processing is easy, and the post-processing difficulty is reduced.

A liquid toner dispersion provided with marking particles comprising a pigment and a polyester based resin, the dispersion comprising a nonpolar organic carrier liquid and a hyperdispersant comprising a graft copolymer provided with an anchor group comprising an amine-functionalized polymer onto which at least one stabilizing group is grafted, wherein a first stabilizing group and a second stabilizing group are coupled to the anchor group, wherein the first stabilizing group is a polyolefin and the second stabilizing group is hydroxylated fatty acid compound.

The invention discloses a preparation method of an air-entraining ester polycarboxylate superplasticizer. The preparation method comprises the following steps: (1) preparing an esterification product; (2) copolymerization reaction; and (3) neutralization reaction. According to the preparation method, the esterification product is prepared by esterification of coco fatty acid diethanolamide and unsaturated acid, the preparation method has the advantages of low cost and simplicity and convenience in operation, and the prepared esterification product participates in the next copolymerization reaction, so that a main chain of the polycarboxylate superplasticizer has hydrophilic groups such as amide and the like; the prepared polycarboxylate superplasticizer has good air entraining and foam stabilizing properties, and the workability and the strength of concrete are improved.

A liquid toner dispersion provided with marking particles comprising a pigment and a polyester based resin. The dispersion includes a nonpolar organic solvent and a hyperdispersant including a graft copolymer provided with an anchor group including an amine-functionalised polymer onto which at least one stabilising group is grafted. The stabilising group includes a hydroxylated fatty acid oligomer. The amine-functionalised polymer has a weight-average molecular weight of less than 1000 g/mol.

The invention belongs to the technical field of material science, and particularly discloses a multi-alkyl-substituted diamine compound containing a polycyclic aromatic hydrocarbon structure. A structural formula is shown in formula (I) or formula (II), wherein X is hydrogen or an alkyl group; Y is hydrogen, a phenyl group, a substituted phenyl group, a polycyclic aromatic hydrocarbon group, a hydroxyl group or a halide group. The multi-alkyl-substituted diamine compound containing the polycyclic aromatic hydrocarbon structure is characterized in that the steric hindrance of the polycyclic aromatic hydrocarbon group on a molecular structure is large, the number of alkyl groups is more, the structure is favorably regulated and controlled, the structure of a polyimide molecular chain prepared by the monomer is twisted, the stacking compactness is little, and the CTC (charge transfer complex) effect in molecular chains and between the molecular chains is inhibited; because the stability of the polycyclic aromatic hydrocarbon structure is high, the heat stability of the polymer is favorably maintained. The multi-alkyl-substituted diamine compound has the advantages that the synthesis is simple, the obtaining of raw materials is easy, and the diamine compound is suitable for industrial production; the diamine compound has large potential in preparation of dissolvable and transparent polyimide, and is suitable for synthesizing polyamide and polyamideimide high-performance materials.

The invention discloses amide-modified polyester resin for a powder coating and the powder coating, and belongs to the technical field of coatings; the amide modified polyester resin for the powder coating comprises 35%-40% of polyol, 50%-53% of polybasic acid, 0.6%-3.1% of polybasic anhydride, 0.4%-2% of polyamine, 0.04%-1% of an esterification catalyst, 8%-15% of an acidolysis agent, 0.2%-1% of an antioxidant and 0.03%-0.05% of a curing accelerator; amide bonds are connected into polyester resin through polymerization reaction, and nitrogen atoms in the amide bonds have a pair of lone pair electrons, so that connection of the connected amide bonds plays a role of an electricity increasing agent; and meanwhile, compared with the prior art that amine compounds in a free state are directly added into a formula to serve as an electricity increasing agent, the amido bonds are grafted into the polyester resin through polymerization, the bond energy of a covalent bond formed in the polymerization grafting process is large, the covalent bond is not prone to breakage after being heated, and thus the introduction of the amido bonds cannot influence the glass transition temperature of the polyester resin, and the thermal stability of the polyester resin is improved.

The invention discloses a high-grade woodware artware coating. The high-grade woodware artware coating comprises a primer and a curing agent, wherein the primer is prepared from the following raw materials in parts by weight: 60 to 70 parts of modified epoxy resin, 2 to 3 parts of graphene oxide, 0.8 to 1 part of a coupling agent, 0.2 to 0.3 part of an antifoaming agent, 0.4 to 0.5 part of a thickener, 0.7 to 0.9 part of a base material wetting agent, 0.1 to 0.2 part of a leveling agent, 4 to 5 parts of dipropylene glycol butyl ether and 12 to 15 parts of water; the curing agent is a polyisocyanate curing agent, and the molar ratio of hydroxyl to isocyanate groups in the modified epoxy resin is 1: 1.3-1.4. According to the invention, the modified epoxy resin is used as a resin matrix of the coating, a modifier is used for graft modification of the epoxy resin chain, and then the modified epoxy resin chain is copolymerized with the polyurethane, so that the performance complementation of the epoxy resin and the polyurethane can be realized, and a coating film has excellent impact resistance, adhesive force, flexibility, hardness, gloss and liquid medium resistance; the obtained coating is suitable for surface coating of high-grade woodware artware, and a paint film with high protection performance is formed on the surface of the coating.

The invention relates to the technical field of corrosion inhibitors, and in particular relates to an imidazoline mannich base corrosion inhibitor and a preparation method thereof. The imidazoline mannich base corrosion inhibitor is of the structure shown in the formula I. The imidazoline mannich base corrosion inhibitor is prepared from, by mass, 10-20% of benzaldehyde, 5-15% of butanone, 40-60%of oleic acid imidazoline, 10-30% of ethanol, 1-5% of concentrated hydrochloric acid and 0.1-0.5% of a catalyst. According to the imidazoline mannich base corrosion inhibitor, a benzene ring, an imidazole ring and an ultra-long hydrophobic alkyl chain on imidazoline are introduced, the benzene ring in benzaldehyde and N atoms in the imidazoline ring have relatively high electron cloud density andcan form a firm coordination bond with an empty d track of metal, and the super-long hydrophobic alkyl chain forms a hydrophobic membrane layer away from the surface of the metal and has a peripheralshielding effect on the surface of the metal, so that the corrosion inhibitor has excellent corrosion inhibition performance in a high-temperature acidification environment.

The invention discloses a preparation method of a composite-layer mask material, and relates to the technical field of medical materials. The mask material is formed by compounding three layers of structures of a composite non-woven fabric, a nanofiber membrane and a composite non-woven fabric. The composite non-woven fabric is a polypropylene melt-blown non-woven fabric; the nanofiber membrane isobtained by spinning a spinning solution by adopting an electrostatic spinning method; and a mask with the composite structure prepared by the method is relatively uniform in pore size distribution,relatively small in average pore size and relatively good in filtering effect.

The invention discloses a sheet material adhesive and relates to the field of sheet material production. The sheet material adhesive contains the following raw materials in parts by weight: 80-100 parts of protein-containing raw material, 0.5-2.5 parts of sodium dodecylbenzene sulfonate, 5-8 parts of boric acid, 10-30 parts of hexa-acetamide, 10-30 parts of reinforcing agent and 10-30 parts of anticorrosive agent. The sheet material adhesive disclosed by the invention is used for solving the problems that the existing synthetic resin adhesives release formaldehyde, pollute environment and are harmful to human. The sheet material adhesive is low in cost, high in bonding strength and good in water resistance and corrosion resistance and can cure at normal temperature, and particularly the low-temperature resistance is better than that of other adhesives.

The invention relates to the field of polyaspartic acid ester resins and coatings thereof, and particularly discloses a low-reactivity polyaspartic acid ester resin and a preparation method thereof, and a coating and a preparation method thereof. The preparation method of the low-reactivity polyaspartic acid ester resin comprises the following steps: uniformly mixing 2, 4 '-diaminodicyclohexylmethane and 2, 2'-diaminodicyclohexylmethane to obtain a mixture, and carrying out Michael addition reaction on the mixture and diester maleate to obtain the polyaspartic acid ester resin. The polyaspartic acid ester resin prepared by the invention not only has low reaction activity, but also has the characteristics of high strength, high weather resistance, low viscosity, high solid content and low VOC (volatile organic compound) emission.

The invention discloses a polyurea of diisocyanate and a chain extender of gauged diacetyl lentine or of isocyanate, gauged diacetyl lentine, and an amino terminated polyether. The preparation method of the polyurea comprises the following steps of: solving the diisocyanate in a solvent or adding an amino terminated polyether after the dissolution of the diisocyanate; then adding quantitive chain extender of the gauged diacetyl lentine solution which is solved in a solvent, stirring the mixed solution evenly at a room temperature, carrying out the solvent volatilization of the solution at a temperature of between 50 and 60 DEG C, continuing to react for 24 to 36 hours, and finally carrying out the solvent volatilization at a temperature of between 80 and 110 DEG C for 1 to 4 hours and continuing to react until reaching a constant weight to obtain the polyurea which has the chain extended by the diacetyl lentine. The polyurea has better flexibility and shows higher tensile strength, breaking strength and elongation at break.

The invention discloses a herbal mashed potato with yam and licorice, which is prepared from the following raw materials in parts by weight: watermelon peel 18-19, sweet almond 15-20, brown sugar 3-5, yam 20-22, licorice 1.6-2, water chestnut shell 1.6-2.1, begonia root 1.2-2.1, potatoes 200-230, pork belly 100-120, salt 8-10, chili powder 3-4, pepper powder 2-3, sodium carboxymethylcellulose 2-3, 1-1.2 mol/lNaOH, selenium-enriched peanut 100-150, succinic anhydride 0.1-0.15, phosphate buffer, petroleum ether in proper amount. In the present invention, sodium carboxymethyl cellulose and peanut protein isolate undergo a glycosylation reaction to form a covalent complex that can maintain good emulsification of food at high temperatures, increase the polypeptide chain, enhance the steric hindrance effect, and simultaneously enhance the complex thermal stability.

The invention provides an embolism microsphere capable of slowly releasing medicine and a preparation method of the embolism microsphere, and belongs to the technical field of medical materials. Molecules capable of slowly releasing drugs are connected to a main chain of the polyhydroxy polymer through an acetal structure or an ester bond structure or copolymerized in a macromolecular network of the microspheres through double bonds. The embolism microsphere capable of slowly releasing the medicine, prepared by the invention, has good medicine loading speed and medicine loading capacity, has the capability of slowly releasing the medicine, and is relatively long in release time, relatively simple in preparation method and mild in reaction condition.

The invention discloses a preparation method of a novel anti-mud slump-retaining nano polycarboxylic acid water reducer. The novel anti-mud slump-retaining nano polycarboxylic acid water reducer is prepared by the following steps: (1) preparing an anti-mud cross-linking agent; and (2) performing polymerization reaction. The novel anti-mud slump-retaining nano polycarboxylic acid water reducer with a cross-linked structure is obtained by carrying out emulsion polymerization on a sulfonate polymerizable emulsifier, a polyether polyol anti-mud cross-linking agent and a monomer. Through cross-linking hardening of the nano-micelle structure, the dispersity of the water reducer can be improved, and the effects of thickening, viscosity reduction, effective mud resistance and concrete workability improvement are achieved. As the nano polycarboxylate superplasticizer is gradually hydrolyzed in cement paste, micelles are cracked through fracture of a cross-linked structure and change of hydrophilicity and hydrophobicity, and various anti-mud small molecules and linear polycarboxylic acid molecules can be released, so that the nano polycarboxylate superplasticizer has long-term anti-mud slump retaining effects. The water reducer can also be used as a regulator in machine-made sand concrete.

The invention discloses a preparation method of efficient concrete additive. The preparation method comprises the following steps: (I) preparing chloro-polyethylene glycol monomethyl ether; (II) preparing an ionized naphthalene sulfonic acid type compound; (III) preparing polycondensate; and (IV) preparing a water reduction agent product. The invention further discloses the efficient concrete additive prepared by using the preparation method of the efficient concrete additive. The efficient concrete additive disclosed by the invention is remarkable in water reduction effect, low in slump loss,good in bleeding resistance and freezing resistance, good in adaptability to cement, and capable of effectively improving the dispersibility of cement, greatly improving the peaceability of concreteand improving various mechanical properties of concrete.

The invention discloses a deer jelly grass scallion-flavored mashed potato, which is prepared from the following raw materials in parts by weight: chopped green onion 3-4, rabbit leg 12-16, beer 18-20, soybean meal 14-16, velvet antler 1.2-2.2, wax gourd Skin 1.8‑2, deer jelly 1.1‑2, potatoes 200‑230, pork belly 100‑120, salt 8‑10, chili powder 3‑4, pepper powder 2‑3, sodium carboxymethylcellulose 2‑3, 1 ‑1.2mol/lNaOH, selenium-enriched peanut 100‑150, succinic anhydride 0.1‑0.15, phosphate buffer, appropriate amount of petroleum ether. In the present invention, sodium carboxymethyl cellulose and peanut protein isolate undergo a glycosylation reaction to form a covalent complex that can maintain good emulsification of food at high temperatures, increase the polypeptide chain, enhance the steric hindrance effect, and simultaneously enhance the complex thermal stability.