317results about How to "High functionality" patented technology

The invention relates to octa-epoxy group cage-like silsesquioxane and a preparation method thereof. At present, the preparation of the cage-like silsesquioxane is generally not functionalized, and has a plurality of synthesis steps, low yield and too high cost. The cage-like silsesquioxane with epoxy groups is most noticeable with unique performance, but the existing cage-like silsesquioxane prepared by taking vinyl trichlorosilane as a raw material through hydrolytic condensation and oxidation is not completely epoxidized, and most of final products are mixtures. The preparation method takes industrialized tetramethyl orthosilicate or tetraethyl orthosilicate as a primary raw material, firstly synthesizes hydrated octa cage-like silicate through hydrolytic condensation, and then prepares the octa-epoxy group cage-like silsesquioxane with flexible chains through hydrosilation reaction and hydrosilylation reaction. The invention is simple and feasible, has high yield and single product structure, and is suitable for industrialized production; and the octa-epoxy group cage-like silsesquioxane has high reactivity, and is easily modified by being compounded with resins such as epoxy resin, phenolic resin, nylon, and the like so as to prepare composite materials with high performance.

A novel polymeric initiator is disclosed comprising a dendritic polymer core with at least one initiating functional group as an end group. The dendritic polymeric core is preferably a hyperbranched polymer. The polymeric initiators are useful in radiation curable compositions such as varnishes, lacquers and printing inks and are especially useful in radiation curable inkjet inks.

The invention relates to a biodegradation sustained-release fertilizer coating material containing soybean oil polyhydric alcohol and a preparation process thereof. The coating material is prepared by stirring a material A and a material B for 5s to 15s under the condition of 65 to 75 DEG C, wherein the material A accounts for 50 to 75 percent of the weight of the coating material, and the material B accounts for 25 to 50 percent of the weight of the coating material; the material A is one or combination of soybean oil polyhydric alcohol, polyether polyhydric alcohol and castor oil, and the material B is isocyanate. The soybean polyhydric alcohol prepared from the soybean oil which is low in price and easy to obtain is strong in water resistance, the coating material which is prepared from multiple functional groups and isocyanate is high in strength and biological degradability and environmentally friendly. By adopting the coating technology, no special equipment is needed, so that not only can the equipment investment cost be greatly reduced, but also the waste of solvent in the recycling process can be avoided, and the biodegradation sustained-release fertilizer coating material is free from polluting the soil, plants and the environment after being utilized for a long time.

The invention discloses a preparation method of a plant-fiber-base polyether ester polylol, which belongs to the field of high polymer chemistry. The preparation method comprises the following steps:liquefying plant fiber materials and a liquefacient under the catalysis of an acid catalyst to obtain a liquefying product; and carrying out the reaction of the liquefying product and cyclic carboxylic ethers, open-chain hydroxyl carboxylic ethers or estolides, and the like under the catalysis of acids, organic tin compounds or titanic acid esters so as to obtain the polyether ester polylol. The method realizes the high functionality and the high reactive activity of the plant-fiber-base polyether ester polylol. The hydroxyl value and the relative molecular mass of the product can be regulatedby changing the material proportions and the technique conditions to obtain the required product so as to prepare the polylol material required by different polyurethane materials and enhance the performance of the polyurethane materials.

The invention discloses a low viscosity solvent-free polyurethane laminating adhesive, which includes component A and component B. The component A is an isocyanate terminated compound, and the component B is a hydroxyl terminated compound. The component A and the component B are mixed according to that the isocyanate terminated group and the hydroxyl are in a mole ratio of 1.3-1.75, thus obtaining the bicomponent polyurethane laminating adhesive. The invention also discloses a preparation method of the low viscosity solvent-free polyurethane laminating adhesive. The low viscosity solvent-free polyurethane laminating adhesive prepared by the invention has the advantages of low viscosity, fast curing speed, high peel strength and resistance to 100DEG C cooking.

The invention relates to an acrylic modified polysiloxane resin and paint thereof. The acrylic modified polysiloxane resin is a compound resin of an acrylic resin with glycidyl and siloxane prepolymer with the number average molecular weight between 400 and 3,000. On the basis of counting solids, in the compound resin, the weight ratio of the acrylic resin with glycidyl and the siloxane prepolymer is between 10 and 40 to between 60 and 90. The paint containing the acrylic modified polysiloxane resin has a component A and a component B, wherein the weight ratio of the dosages of acrylic modified polysiloxane resin, pigment, filler, solvent and additives of the component A is 100:10-60:5-40:5-20:1-2; the component B is amino alkoxy silane as a curing agent; and when the coating is in use, the component A and the component B are well mixed in the weight ratio of 10 to between 0.8 and 1.5. Compared with the prior acrylic modified polysiloxane coating, the coating is fast in drying rate and excellent in weatherability.

An apparatus coupled to a low speed tester and a device is disclosed. The device may have a first speed faster than a second speed of the low speed tester. The apparatus may be configured to allow the low speed tester to perform high speed tests of the device at the first speed.

The invention discloses a preparation method of polyether glycol. The method comprises the following step: preparing the polyether glycol from compound initiator, polyether glycol synthetic catalyst and propylene oxide by using a conventional polyether glycol synthesis method, wherein the compound initiator comprises the following components in parts by weight: 0.04-0.08 part of glycerol, 0.2-0.4 part of dihydroxymethylphenol and 0.56-0.72 part of sucrose; and the mass ratio of the propylene oxide to the compound initiator is 1.7-2.3. The invention also discloses polyether glycol prepared by using the method, a method for preparing polyurethane rigid foamed plastic from the polyether glycol, and polyurethane rigid foamed plastic. The polyether glycol disclosed by the invention has the advantages of low viscosity and high functionality, and has favorable processing properties when being used as a raw material. The polyurethane rigid foamed plastic prepared from the polyether glycol has the advantages of excellent high-temperature resistance, high flame resistance and high compression strength.

The invention provides a hyperbranched water-based polyurethane coating and a preparation method thereof, belongs to the field of water-based coating, and is used for solving the problem that the existing hyperbranched water-based polyurethane is poor in waterproofness, solvent resistance and weather fastness. The coating comprises 35-68 parts of hyperbranched water-based polyurethane, 0.3-0.9 part of water-based wetting agent, 0.2-0.7 part of water-based flatting agent, 0.5-1.1 parts of water-based deformaer, 8-12 parts of water-based cosolvent and 2.5-4.3 parts of curing agent. The hyperbranched water-based polyurethane is prepared with hyperbranched polyester BoltornTMH40 as a soft segment and diaminosulfonate as a hydrophilic chain extender. A film formed by the cured hyperbranched water-based polyurethane coating provided by the invention has no phenomena of blushing, bubbling and falling even after being soaked in normal-temperature water for 60 hours, and also has no phenomena of blushing, facing and dulling even after being wiped 200 times by using ethanol and acetone.

The invention discloses high-functionality degree polyester polyol and a preparation method thereof. The high-functionality degree polyester polyol comprises the following components in parts by mass: 900-1200 parts of polyester alcoholysis liquid, 900 parts of phthalic anhydride, 400-600 parts of aliphatic dibasic acid, 800-1000 parts of dihydric alcohol, 550-900 parts of polyhydric alcohols, 0.3-0.5 part of esterification catalyst. The preparation method comprises the following steps: carrying out an esterification reaction, removing the moisture, performing condensation polymerization, thereby obtaining the product. According to the high-functionality degree polyester polyol, the average functionality degree is 2.4-2.5, the viscosity is less than or equal to 10000mPa.S at the temperature of 25 DEG C, the hydroxyl value is 300-350mgKOH/g, the acid value is less than or equal to 1mgKOH/g, and the polyester polyol is non-crystallizable after being stored for three months under the condition of 2 DEG C. The polyester polyol disclosed by the invention can be widely applied to the fields of rigid polyurethane foam plates, polyurethane elastomers and polyurethane adhesives.

The invention relates to a polyester resin used for TGIC curing high-toughness thermal transfer printing powder paints, and a preparation method thereof. The glass-transition temperature of the polyester resin is relatively high, so that prepared powder paint coating possesses high toughness at normal temperature and -15 DEG C. According to the preparation method, the polyester resin is obtained via melt polycondensation of following raw materials: a polyol, a polyacid, an acidolysis agent, an esterification catalyst, an antioxidant, and a curing accelerator. The preparation method comprises following steps: 1) the polyol is delivered into a reaction kettle at a needed ratio, rapid heating esterification is carried out, water is generated, and is removed via distillation; 2) temperature is increased gradually, and an obtained material is maintained to be clear; 3) sample examination is carried out; 4) one half of the antioxidant is added, and negative pressure polycondensation is carried out; and 5) cooling is carried out, one half of the antioxidant and the curing accelerator are added, stirring dispersing is carried out, and an obtained product is cooled, and is collected.

The invention discloses cashew nut shell oil-modified phenolic resin and a preparation method for cashew nut shell oil polyether polyol prepared from the cashew nut shell oil-modified phenolic resin. The method for preparing the cashew nut shell oil-modified phenolic resin comprises the following steps: adding cashew nut shell oil and an acidic catalyst in a reactor; then adding a coupling agent by stirring to enable the coupling agent to be completely dissolved; and raising the temperature, reacting and dehydrating to obtain a product. The method for preparing the cashew nut shell oil polyether polyol comprises the following steps: adding a basic catalyst and an epoxy compound into the product; and rising the temperature, reacting, cooling and filtering to obtain the cashew nut shell oil polyether polyol. The polyether polyol prepared by the preparation method disclosed by the invention has the advantages of low viscosity, moderate functionality degree, no toxicity, regeneration and the like. The phenolic resin disclosed by the invention is used as intermediate resin. The cashew nut shell oil polyether polyol disclosed by the invention is applied to polyurethane coating and is used as hydroxyl-containing resin to be matched with an isocyanatec component to form a polyurethane coating system. The cashew nut shell oil polyether polyol has the characteristics of favorable corrosion resistance, in particular to alkali resistance, excellent mechanical performance and the like.

The invention relates to an epoxy resin composition with excellent flexibility and flame retardance, and a preparation method thereof. The epoxy resin composition is powered and comprises the following ingredients in parts by mass: 20-40 parts of epoxy resin 5-25 parts of flexible flame-retardant polyester curing agent with a star-like branched structure, 0-8 parts of other curing agent, 0.05-0.3 parts of curing accelerant, 5-25 parts of flame-retardant synergist, and 30-50 parts of inorganic filler. The epoxy resin composition relating in the invention does not contain halogen and antimonous oxide, has excellent flexibility and flame retardance, not only can realize the halogen-free flame retardance of an electronic packaging material, but also can endow the electronic packaging material with excellent flexibility after being used for the field of the electronic packaging materials, so that the cold and hot impact resistance of the electronic packaging material can be improved greatly.

The invention discloses a production method of polyester polyol. According to the method, natural oil is modified by maleic anhydride and then reacts with small-molecule polyol, dicarboxylic acid or carboxylic ester to obtain a polyester polyol product with high cyclopentane solubility. According to the invention, the modified oil can be led into a polyester body relatively completely so as to improve the functionality of the whole product; the cost of the adopted raw materials is low, and the technology is easy to operate; and particularly in the process of producing low-density polyurethane foam, the solubility of the adopted cyclopentane in polyester polyol can be improved at least to 25%.

The invention discloses water dispersible hyperbranched polyisocyanate and a preparation method thereof. The preparation method comprises that hyperbranched polyester with different generation quantities is synthesized while polyalcohol is taken as a core molecule, dimethylolpropionic acid is taken as a monomer and dimethylbenzene is taken as a solvent, end group modification is carried out on the hyperbranched polyester, a high reactivity isocyanate group is introduced for synthesizing hyperbranched polyisocyanate, and then waterborne treatment is carried out on the hyperbranched polyisocyanate, so that the water dispersible hyperbranched polyisocyanate is obtained. The preparation method is low in production cost and simple in technological equipment, and the prepared water dispersible hyperbranched polyisocyanate has high functionality degree, high reactivity and low viscosity, can be dispersed in water and can be used for improving the physical and chemical properties of a coating when being applied to a waterborne alkyd paint, a waterborne polyurethane coating and a waterborne acrylic coating as a curing agent.

The invention discloses a preparation method for cross-linking waterborne polyurethane. The preparation method comprises the following steps that 1, polyester polyol and diisocyanate are mixed, then acatalyst of dibutyltin dilaurate is dropwise added, nitrogen is introduced, and reaction is carried out; 2, a hydrophilic chain extender is added for reaction, then a end-capping chain extender is added for reaction, and after a neutralizer is added for reaction, water is added for dispersing so as to obtain a waterborne polyurethane emulsion; and 3, a multi-double-bond castor oil solution is added into the waterborne polyurethane emulsion, an initiator is dropwise added, reaction is carried out, and after the reaction is finished, a solvent is removed so as to obtain the cross-linking waterborne polyurethane. According to the method, the waterborne polyurethane emulsion is firstly synthesized, then free radical copolymerization reaction is carried out on multi-double-bond castor oil andthe waterborne polyurethane, the multi-double-bond castor oil is connected into a waterborne polyurethane structure so as to form the cross-linking waterborne polyurethane with a spatial network structure, and therefore the mechanical performance of the cross-linking waterborne polyurethane is improved; and the spatial density inside a polymer is increased, so that the space is shrunk, water molecules are difficult to enter, and therefore the water resistance is improved.

The invention provides polyisocyanates containing diphenyl-methane-group diisocyanate, and a preparation method. The polyisocyanate has a structure ad follows. The preparation method comprises: taking diphenyl-methane-group diisocyanate monomers and trimer products thereof as main isocyanate raw materials; allowing the main isocyanate raw materials to react with functional organic silicon compounds; and obtaining a series of polyisocyanates. The polyisocyanates can be used as paint, ink and curing agents of adhesive, and have low viscosity, quick-drying property, high hardness, good adhesive force and other excellent performances.

The invention discloses a preparation method of waterborne polyurethane with excellent freeze-thawing stability. The preparation method specifically comprises the steps of: at 20-80 DEG C, adding amino type polyhedral oligomeric silsesquioxane into acetone of excessive isocyanate monomer, reacting to be clear, setting the temperature to be 60 DEG C, adding ethyoxyl-terminated polymer glycol, diol and polyol, and catalyst di-n-butyl tin dilaurate, reacting for one to two hours, and controlling the R value to be 1.50-3.00 in the prepolymerization reaction; then increasing the temperature to be 70-90 DEG C, continuously reacting for one to two hours, then cooling to room temperature, adding water for dispersion, adding a chain extender at 30-50 DEG C to conduct chain extension reaction for two to four hours, and cooling to room temperature to obtain waterborne polyurethane. Through tests, the waterborne polyurethane has favorable wear resistance property and bonding strength, as well as excellent freeze-thawing stability.

The invention belongs to the field of chemical synthesis, and particularly relates to high-temperature-resistant polyether polyol and a preparation method thereof. The high-temperature-resistant polyether polyol is characterized by being prepared from the following components in parts by weight: 600-1,000 parts of sorbierite, 300-600 parts of cane sugar, 3,300-3,800 parts of epoxy propane, 10-18 parts of potassium hydroxide, 20-36 parts of phosphoric acid and 140-200 parts of water. The method has the advantages: the prepared high-temperature-resistant polyether polyol is catalyzed by using potassium hydroxide; sorbierite is an ideal starting agent for preparing temperature-resistant polyether; and the polyether polyol synthesized by adopting sorbierite and cane sugar with high functionality has high functionality and low hydroxyl value. Hard urethane foam plastic prepared from polyether polyol has high heat resistance, high size stability, thermal oxidation resistance, oil resistance, bonding property and high size stability.

The invention relates to a flexible epoxy resin composition with a hyperbranched structure and a synthesis method thereof. The flexible epoxy resin composition comprises the following ingredients in parts by weight: 25-40 parts of epoxy resin, 15-20 parts of a hyperbranched polyester curing agent, 0-5 parts of other curing agents, 0.05-0.3 part of a curing accelerator and 30-55 parts of an inorganic filler. After the hyperbranched polyester curing agent is added, the synthesized polyester curing agent is applied to an epoxy electronic packaging material, the flexibility is excellent, the crosslinking density and the strength are large, the electronic packaging material is free of halogen, the machinability, the physical properties and the electrical property of the electronic packaging material are optimized, and the flexibility applied to the electronic packaging material is excellent, so that the cold and thermal shock resistances of the electronic packaging material is largely improved.

The invention relates to a preparation method of pure crystalline sorbitol polyether polyol, and belongs to the technical field of rigid-foam polyether polyol. The preparation method of pure crystalline sorbitol polyether polyol comprises the steps that pure crystalline sorbitol serves as an initiator, alkali metal serves as a catalyst, the initiator and epoxypropane are subjected to a three-stage polymerization reaction at the certain pressure and temperature, and pure crystalline sorbitol polyether polyol is obtained. The method is simple and easy to carry out, raw material supply is stable, safety and environment protection are achieved, and prepared polyether polyol has the advantages of being high in degree of functionality, low in cost, diversified and the like and can meet different user requirements.