93results about How to "High hydroxyl value" patented technology

The invention discloses a hydroxypolyacrylate emulsion, and a preparation method and an application thereof. The preparation method comprises the following steps: weighing an acrylate monomer and/or a metacrylate monomer, a hydroxyacrylate monomer, an acrylic monomer, an acrylate function monomer and a hydroxy oligomer, uniformly mixing to prepare a monomer mixture, weighing 10-15% of the monomer mixture, and emulsifying by using an emulsifier to prepare a seed pre-emulsion for later use; and adding the emulsifier, sodium bicarbonate and deionized water into a reaction kettle, stirring, rising the temperature of a reaction system, adding an initiator, stabilizing, adding the seed pre-emulsion in a dropwise manner, stabilizing, adding the remaining monomer mixture and the remaining initiator in a dropwise manner, heating, slaking, cooling, neutralizing, carrying out heat insulation, cooling, and discharging to obtain the hydroxypolyacrylate emulsion. A film made by using an aqueous dual-component polyurethane coating prepared from the hydroxypolyacrylate emulsion and an aqueous polyisocyanate curing agent has the advantages of high hardness, high luster and excellent chemical resistance.

The invention provides a high polymer chemistry coal and rock mass reinforcer for coal mines and solves the problems of the existing polyurethane reinforcing material, such as high price, inflammable and toxic properties, poor performance stability and the like. The high polymer chemistry coal and rock mass reinforcer for coal mines provided by the invention comprises components A and B which are the same in volume, wherein the component A consists of polyether polyol, catalyst and fire retardant, and the component B is polyaryl polymethylene isocyanate; the polyether polyol has more than 3 functional groups, hydroxyl value of 450-550 and molecular weight of 300-500; the catalyst is composed of dibutyltin dilaurate and triethylene diamine; and the fire retardant is composed of methyl methylphosphonate, tri(1,3-dichloro-2-propyl) phosphate and sodium silicate. The high polymer chemistry coal and rock mass reinforcer for coal mines provided by the invention belongs to polyurethane grouting agents and silicate modified polyurethane grouting agents, and is an environment-friendly material with resin content of 100% and no volatile organic compounds, and all indexes of the reinforcer completely accord with AQ1089-2011 quality standard of high polymer material for reinforcing coal and rock mass in coal mines.

The present invention relates to novel polymer polyols which have low viscosities and high hydroxyl numbers, and to a process for the preparation of these novel polymer polyols. These polymer polyols have hydroxyl numbers of ≧20, solids contents of about 30 to about 65% by weight and a viscosity that is less than or equal to: be^[2.7c]. These comprise the reaction product of a base polyol, a preformed stabilizer and at least one ethylenically unsaturated monomer, in the presence of a free-radical polymerization initiator and at least one polymer control agent. The base polyol has a hydroxyl number of 60 to 1900, a functionality of 1 to 10, and an equivalent weight of 30 to 900.

The invention discloses high-strength polyurethane rigid foam, as well as a preparation method and application thereof. The invention introduces a benzoyl imide reinforced polyurethane modifier with a rigid structure; the benzoyl imide reinforced polyurethane modifier, the corresponding high-viscosity aromatic amine polyether polyol, low functionality polyether polyol, special silicon oil for increasing isotropy of the foam, a catalyst with a specific structure, water and a foaming agent are used for preparing the premixed polyether polyols and react with the polyisocyanates to generate the high-strength polyurethane foam. The polyurethane rigid foam provided by the invention has the characteristics of low batch charging density, high compressive strength, low heat conductivity coefficient and good size stability under low temperature, and can be used in the household appliance inside insulating materials such as the fridge, the refrigerator, the solar energy, the gas water heater and the disinfection cabinet.

The invention discloses a coating composition and an application of the coating composition to a metal base material. The solid content of the coating composition is 40-70%. The coating composition comprises the following components of, by weight, 5-60% of saturation polyester resins, 0-25% of crylic acid resins, 2-30% of crossing-link agents, 20-80% of polyvinyl chloride homopolymer, 0-15% of additives, 0-40% of pigments and the balance dilution solvents, wherein average molecular weight Mn of the saturation polyester resins is 3000-8000, the vitrification temperature of the saturation polyester resins is 10-20 DEG C, the acid value of the saturation polyester resins is 0-5, the hydroxyl value of the saturation polyester resins is 30-90, and the saturation polyester resins are free of neopentyl glycol. The coating composition is free of bisphenol-A diglycidyl glycerol ether (BADGE) and bisphenol A (BPA). According to the coating composition, the polyester resins which meet requirements can be easily obtained, improved space of resin performances is large, 40%-70% of the solid content of final products can be achieved, and a large quantity of organic solvents are saved.

The invention discloses a continuous method for preparing hydrophilic copolyester slices and the hydrophilic copolyester slices prepared by the preparation method. The preparation method of the hydrophilic copolyester slices prepared by the continuous method comprises the following steps: continuously and uniformly adding pure terephthalic acid, ethylene glycol, benzene dibasic acid binary alcohol ester-5-sodium sulfonate, polydibasic alcohol, other dibasic alcohols, a delustering agent and the like into a beating kettle in proportion, performing esterification, prepolycondensation and polycondensation reactions, discharging, pelletizing and drying to get the hydrophilic copolyester slices. A continuous polymerization device is adopted for synthesis; and in the prepared hydrophilic copolyester slices, the molecular structure of polyester is changed by adding hydroxyl-containing components and inorganic powder into copolyester slices, thus the hydrophilic property is good. The preparation method is simple, the manufacturing process has no special requirements on the polymerization device, and the hydrophilic copolyester slices can be produced on existing domestic or imported equipment, so that the production cost is slow and industrial production is easy to realize.

The invention relates preparation of castor oil-based coating material and application of the castor oil-based coating material in controlled-release fertilizers. Epoxidized castor oil is prepared from castor oil as a raw material by using a non-solvent method under acid catalysis by using small-molecular carboxylic acid and hydrogen peroxide as modifiers; then, small-molecular alcohols and alcohol amines are used as ring-opening reagents to prepare the modified castor oil coating material 200-400 mgKOH/g in hydroxyl value under the action of a solid acid catalyst. The modified castor oil coating material and isocyanate are used as component A and component B respectively to prepare a modified castor oil coated controlled-release fertilizer by using non-solvent in-situ reaction coating technology. The controlled-release fertilizer is green, the production process of the fertilizer is simple, the controlled release effect is good and stable, and controlled-release fertilizers with different release periods may be prepared by changing coating amount.

The invention relates to polyester resin and a synthesis method thereof. The polyester resin comprises the following raw material components in parts by mass: 45-53 parts of aromatic binary acid, 40-50 parts of a branching agent, 0-10 parts of dihydric alcohol and 0-0.01 part of an esterification catalyst; the polyester resin is synthesized by melt phase polycondensation. The polyester resin has an ultrahigh hydroxyl value, has acceptable glass-transition temperature, can be used for preparing an AB dry-blending extinction powder coating and has a favorable extinction effect.

The invention discloses bifunctional polyester resin for a powder coating. The polyester resin has two functional groups including a terminal carboxyl group and a terminal hydroxyl group and has the acid value of 20-45 mgKOH/g, the hydroxyl value of 15-45 mgKOH/g, the viscosity of 2,600-5,200 mPa.s at the temperature of 200 DEG C, the number-average molecular weight of 3,000-4,500 and the glass transition temperature of 61-69 DEG C; the polyester resin is mainly prepared from components in mole percent as follows: 44mol%-55mol% of dibasic alcohol, 40mol%-46mol% of binary acid, 0.1mol%-3.0mol%of a branching agent, 4mol%-15mol% of an acidulate agent and 0.01mol%-0.10mol% of an esterification catalyst through melt polymerization. The polyester resin has outstanding comprehensive properties in the aspects of leveling performance, mechanical property, weather fastness, boiling resistance, heat resistance, solvent resistance, heat transfer printing property and the like. The invention alsodiscloses a preparation method of the bifunctional polyester resin for the powder coating.

The invention relates to the technical field of grouting materials and specifically relates to a high polymer grouting material and a preparation method thereof. The high polymer grouting material isprepared from an ingredient A and an ingredient B according to a proportion of (1.8 to 2.5) to 1, wherein the ingredient A is prepared from the raw materials of polyether glycol, triethanol amine, isocyanate, epoxy resin, an initiator, a cross-linking agent and a chain extender; the ingredient B is prepared from the raw materials of a plasticizer, a defoaming agent, a catalyst and a diluent. The high polymer grouting material disclosed by the invention has the advantages of good permeability and short curing time; strength of cured condensate is high, bonding to the concrete is formthe cured condensate has concrete bonding firmness, and a cured part has good permeable resistance; furthermore, a construction technology is simple, and normal-temperature curing under the dry and moist conditions is achieved.

The invention relates to a heat preservation material, and discloses a polyurethane heat preservation material. The heat preservation material is prepared by mixing and foaming the following raw materials in parts by weight: 70 to 100 parts of 1, 6-hexamethylene diisocyanate, 40 to 80 parts of polyether glycol I, 10 to 30 parts of polyether glycol II, 3 to 6 parts of expanded vermiculite, 5 to 8 parts of nanosilicon dioxide, 10 to 20 parts of a foaming agent, 1 to 5 parts of dihydroxyethyl amine monoisopropanolamine and 1 to 5 parts of a foam stabilizer, wherein the polyether glycol I is lignin polyether glycol; the polyether glycol II is polyether glycol polymerized by modified sunflower seed oil serving as a starting agent and epoxypropane serving as a polymeric monomer. The heat preservation material is higher in compressive strength, tensile strength and impact strength, and meanwhile, phenomena of deformation, bulging, ridging and even cracking of a water tank are avoided.

The invention relates to acetyl terminated polyester and a preparation method thereof and belongs to the technical field of organic high-molecular compound synthesizing. The acetyl terminated polyester uses polyether and acetic anhydride as the raw materials. The preparation method is characterized in that after condensation reflux reaction, most of acid is removed by a nitrogen bubbling manner under a vacuumizing condition, the rest acetic acid and acetic anhydride are removed through a falling-film evaporator under high-vacuum condition, and co-boiling solvent, the acetic acid and the acetic anhydride to obtain the acetyl terminated polyester. The preparation method used for synthesizing the acetyl terminated polyester is high in termination rate, clean in alcohol removing, and the like.

A process of producing multi-hydroxy polyols, the process comprising providing a biomass material and transamidating the biomass material with an amine selected from the group consisting essentially of a diamine and an alkanolamine, to provide low molecular weight derived amino-acids or derived oligomers of proteins. Thereafter, reacting the derived amino-acids or derived oligomers with a carbonate to provide hydroxyl terminated urethane oligomers.

The invention discloses a rigid polyurethane foam and a preparation method thereof. The preparation method of the rigid polyurethane foam comprises the following steps: premixing 100 parts by weight of hyperbranched polyurethane polyol with 1-10 parts by weight of foam stabilizer, adding 100-250 parts by weight of organic isocyanate or modified isocyanate to the pre-mixture and then curing at 30-100 DEG C for 12 hours to 3 days, thus obtaining the rigid polyurethane foam, wherein the hyperbranched polyurethane polyol is prepared by use of the following steps: reacting a polyhydroxylated compound with a diisocyanate monomer to obtain a first-generation hyperbranched prepolymer; on the basis of the isocyanate group content of the first generation hyperbranched prepolymer, adding the polyhydroxylated compound again and reacting to obtain the hyperbranched polyurethane polyol. The rigid polyurethane foam prepared by use of the method is high in strength, good in temperature resistance, good in dimensional stability and low in heat conductivity coefficient, and can be applied to the fields of thermal insulation, gap filling and supporting, wood-imitation materials and the like.

The invention discloses terminal hydroxyl polyester resin for co-extrusion extinction powder coating and a preparation method of the terminal hydroxyl polyester resin. The terminal hydroxyl polyester resin comprises trimethylolpropane, terephthalic acid, isophthalic acid, neopentyl glycol, an antioxygen and an esterification catalyst. Compared with the prior art, the synthesized polyester resin has the advantages that the glass transition temperature Tg of the polyester resin is higher than 51 DEG C; the polyester resin can provide a good storage stability; the viscosity is 2800-3000mPa.s (200 DEG C), and a good leveling effect can be provided due to the low viscosity; the polyester resin has a high hydroxyl value, carries out co-extrusion extinction with a low hydroxyl value, and has low luster being 7-10 percent.

The invention discloses a preparation method for polyester polyol by grease restructuring, comprising the following steps: carrying out a basic hydrolysis on grease raw materials to prepare aliphatic acid and glycerin; weighing to take certain mass proportion of aliphatic acid, acetate, hydrogen peroxide (30%) and a catalyst, wherein m aliphatic acid: m acetate : m hydrogen peroxide : m sulfuric acid = 100:0-50:40-150:1-5, and adding the aliphatic acid, acetate and the catalyst into a reactor simultaneously; adding the hydrogen peroxide dropwisely for 1 hour to 2 hours at a temperature of 40 DEG C, standing the mixture for reaction for 2 to 4 hours at a temperature of 60 DEG C, and carrying our a ring opening hydrolysis for 1 hour to 2 hours in backflow state; carrying out phase splittingon the oxidized product, adding glycerin and an esterification catalyst into the organic phase, and carrying out esterification for 1 hour to 2 hours at a temperature of 180 DEG C under the conditionof reduced pressure (5-10 Kpa). Therefore, aliphatic acid polyester polyol with an acid value of 1 to 10 mg KOH/g and a hydroxyl value of 280 to 410 mg KOH/g is obtained.

A method comprises enabling epoxy vegetable oil to react with a compound of a formula III in a second microstructured reactor to obtain the vegetable oil polyol. Compared with the existing technology, the present invention adopts a novel, environment-friendly ring-opening agent, the obtained polyol is novel in structure, high in hydroxyl value, even in distribution and low in viscosity, and can completely replace traditional petrochemical polyol to be applied to the preparation of polyurethane foam materials.

The invention discloses hydroxyl-terminated polyester resin for co-extrusion extinction powder paint. The hydroxyl-terminated polyester resin comprises a branching agent, terephthalic acid, isophthalic acid, dihydric alcohol, an antioxidant and an esterification catalyst. Compared with the prior art, the polyester resin synthesized in the invention has the advantage that the glass transition temperature Tg of the polyester resin is higher than 51 DEG C and good storage stability can be provided; the viscosity is 2800-3000mPa.s (200 DEG C) so as to provide good leveling effects, a hydroxyl value is relatively high so as to have very low gloss of 7-10% as low-hydroxyl-value co-extrusion extinction.