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One
Rapid curing intumescent coating composition
Publication No.: cn110945088a publication date: March 31, 2020 patentee: PPG coatings Europe Co., Ltd
Abstract: the invention relates to an expandable coating composition, which comprises: (a) polycyclic oxygen functional compound; (b) β - hydroxy ester of (meth) acrylic acid containing a plurality of β - hydroxy (meth) acrylate groups; (c) compound with a plurality of functional groups having reactivity with the following groups: epoxy group of polycyclic oxygen functional compound (a) and (meth) acrylate group containing a plurality of β - hydroxy (meth) acrylate groups ）(meth) acrylate group of β - hydroxy ester of acrylic acid; and (d) compounds providing expansion gas during thermal decomposition, wherein compounds (a) to (d) are different from each other, relating to a method of coating a substrate with the expansion coating composition and a substrate at least partially coated with a coating deposited by the expansion coating composition.
Two
Polyimide varnish and its manufacturing method
Publication No.: cn110945079a publication date: March 31, 2020
Patentee: Asahi Chemical Co., Ltd
Abstract: the purpose of the invention is to provide a polyimide film with high transparency and improved bending resistance against multiple bending, and a varnish capable of providing the polyimide film. The varnish of the invention comprises a polymer (α) and a solvent (β). The polymer (α) is a polyimide or a polyimide precursor. The varnish further comprises a main group metal element with an atomic weight of more than 26 but less than 201, or at least one metal element belonging to a transition metal element with an atomic weight of more than 26 but less than 201, except alkali metal and alkaline earth metal. At least one of the metal elements contained in the varnish is present in an amount of 0.05 to 500 ppm relative to the polymer (α).
Three
Method of improving the antibacterial property of polyurethane coating by hydrophilic chain extender
Publication No.: cn110938359a publication date: March 31, 2020
Patentee: Tianjin University
Abstract: the method of using hydrophilic chain extender to improve the antibacterial performance of polyurethane coating is disclosed, which takes polytetrahydrofuran glycol as the soft segment, isophorone diisocyanate as the hard segment, dibutyltin dilaurate as the catalyst, n? Methyldiethanolamine as hydrophilic chain extender, adjusts the content of hydrophilic chain extender, neutralizes with glacial acetic acid, and carries out the test in aqueous solution containing antibacterial agent The polyurethane antibacterial coatings with different hydrophilicity were obtained by emulsification. The invention overcomes the disadvantages of the prior art and obtains a method for controlling the antibacterial performance of the cationic waterborne polyurethane coating without increasing the content of the antibacterial agent, which can improve the antibacterial ability of the coating and reduce the use amount of the antibacterial agent.
Four
A kind of high performance waterborne polyurethane top coat with wet touch and its preparation method
Publication No.: cn110938363a publication date: March 31, 2020 patentee: Jiangsu Jiunuo Building Materials Technology Co., Ltd
Abstract: the invention relates to the technical field of top coat, in particular to a wet and wet high-performance waterborne polyurethane top coat and its preparation method, which comprises component A and component B. the percentage composition of component A is as follows: hydroxy acrylic resin a50%? 60%, polyester resin B10%? 15%, titanium dioxide 10%? 15%, carbon black 1%? 3%, dispersant 1%? 1.5%, base material wetting agent 2%? 10% Defoamer 2%? 6%, deionized water 8%? 18%; the invention adopts hydroxy acrylic dispersion resin with hydroxyl content of 3.0 as the main film-forming material, the resin with hydroxyl content has excellent flexibility compared with the high hydroxyl resin, the drying speed is relatively fast, and can meet the requirements of offline drying, and the resin crosslinking density with hydroxyl content can ensure that the paint film is resistant to chemical medium It can not only wet the pigment in the system, but also play a good role in the substrate. It can reduce the surface tension under the condition of wet film, so that the liquid coating has better leveling, permeability and defoaming.
Five
An ultra fast drying epoxy primer and its preparation method
Publication No.: cn108047892b publication date: March 31, 2020
Patentee: Yatu high tech materials Co., Ltd
Abstract: the invention discloses an ultra fast drying epoxy primer and a preparation method thereof. The super fast drying epoxy primer is prepared by mixing two components a and B at a mass ratio of 5:1, wherein component a includes elastomer modified epoxy resin 15-30 by weight, coupling agent 1-3 by weight, dispersant 0.1-0.6 by weight, anti settling agent 0.2-0.8 by weight, cosolvent 10-20 by weight and pigment filler 23.2-80.5 by weight; component B includes curing agent 2 0-50 by weight, 1-3 by weight of adhesion promoter and 20-50 by weight of cosolvent. After spraying for 2 hours, polishing can be carried out. After polishing, atomic ash can be scraped without undercutting. The primer has excellent adhesion, and the adhesion to zinc plate, steel plate and aluminum plate reaches 0? 1 level without polishing the base material. At the same time, it has good water resistance and salt spray resistance. The adhesion to atomic ash reaches 6.5? 8.3mpa.
Six
A PDMS super hydrophobic composite coating and its preparation method
Publication No.: cn107057562b publication date: March 31, 2020
Patentee: Hunan University
Abstract: the invention provides a preparation method of PDMS super hydrophobic composite coating and coating, the coating includes the following components, diatomite, graphite fluoride, polyamide, polydimethylsiloxane, curing agent, and the mass ratio of them is (16-24): (0.8-1.2): (0.8-1.2): (16-24): (1.5-2.5); the solvent is organic solvent, and the concentration of diatomite is 90-130mg / ml. The coating provided by the invention has simple preparation process, does not need complex material pre modification, only needs to be mixed according to the ratio and solidified at 50 ℃ ~ 70 ℃, and can be used. The super hydrophobic coating can be obtained on the small area plate material and pipeline by the dip pull method, and the large area plate material can be sprayed by the high-pressure spraying method, which is suitable for industrial production.
Seven
A special transparent primer for solid wood and its preparation method
Publication No.: cn107916062b publication date: March 31, 2020
Patentee: Guangdong Huilong coating Co., Ltd
Abstract: the invention discloses a special transparent primer for solid wood and a preparation method thereof. The special transparent primer for solid wood is made of two special saturated polyester resins and epoxy resins plus a certain amount of talcum powder and other auxiliary raw materials to form a transparent primer as component A; butyl acetate and polyisocyanate curing agent are prepared as component B; butyl acetate, propylene glycol methyl ether acetate and carbon are used as components Dimethyl acid, xylene and so on are compounded into component C. during the construction, the three components of methyl ethyl propylene are mixed evenly in a certain proportion and then coated on the surface of high-grade solid wood furniture to form a coating. The test and practical results show that the coating not only has strong adhesion, good flexibility, high hardness, good transparency, but also has the ability of reinforcement, filling, anti sinking, highlighting the natural texture of wood (clarity) , three-dimensional sense), greatly improving the texture and grade of solid wood furniture.
Eight
A wear-resistant and anticorrosive coating for inner wall of thermal pipeline and its preparation method
Publication No.: cn110922889a publication date: March 27, 2020
Patentee: Shanghai Hailong saineng New Material Co., Ltd
Abstract: the invention discloses a wear-resistant and anti-corrosion coating for the inner wall of thermal pipeline, the coating includes component A and component B, the component a includes phenolic epoxy resin, silicone epoxy hybrid resin, methyl isobutyl ketone, inorganic filler and assistant, the component B includes modified alicyclic amine and aminoalkoxysilane, wherein the inorganic filler includes modified zinc phosphate and trimer Aluminum phosphate, mica powder, silicon carbide, carbon fiber and titanium dioxide. The invention also discloses a preparation method of a wear-resistant and anti-corrosion coating for the inner wall of a thermal pipeline. The anti-wear and anti-corrosion coating for the inner wall of the thermal pipeline of the invention not only has high temperature and high pressure resistance, protects the pipeline from the corrosion of the hot water medium, but also has good wear resistance and stain resistance. The coating of the invention reduces the friction damage of the pipeline caused by the iron scraps, welding slag and other impurities in the hot water transportation, greatly prolongs the service life of the thermal pipeline 。
Nine
Preparation and products of a hydrophobic polyurea / graphene oxide protective coating material
Publication No.: cn110922871a publication date: March 27, 2020
Patentee: Hunan University of science and technology
Abstract: the invention relates to a preparation method of a hydrophobic polyurea / graphene oxide protective coating material: (1) preparation of a dihydroxy fluoropolymer containing trifluconate; (2) modification of graphene oxide (go) by hexamethylene diisocyanate (HDI) and polyaspartic acid ester; (3) dihydroxy fluoropolymer, polyaspartic acid ester, HDI Trimer and modified oxide The graphene protective coating material with hydrophobic property was obtained by coating the graphene with a certain proportion. By introducing hydrophobic monomer and modified graphene oxide, a polyurea coating material with both hydrophobic and high corrosion resistance is prepared, and its static water contact angle is up to 151.7 °. The hydrophobic polyurea / graphene oxide protective coating material has excellent hydrophobic performance, anticorrosive performance and low VOC emission, and can be applied to the protection of offshore wind power blades.
Ten
A super weather resistant PVDF double layer powder coating and its preparation method
Publication No.: cn108047836b publication date: March 27, 2020
Patentee: Guangdong Huajiang Powder Technology Co., Ltd
Abstract: the invention provides a super weather resistant PVDF double-layer powder coating and a preparation method thereof. Firstly, the acrylic resin or saturated carboxyl terminated polyester resin or saturated hydroxy terminated polyester resin is matched with the corresponding curing agent, auxiliary agent, pigments and fillers and other materials, and the single-component powder coating is made by melting extrusion and crushing to the appropriate particle size, and then the PVDF resin is matched with the corresponding auxiliary agent, pigments and fillers and other materials The two single-component powders are bonded and agglomerated by controlling the spindle frequency, temperature and holding time of the agglomerating and dispersing equipment to produce a high-performance PVDF double-layer powder coating. The invention improves the adhesion and powder stability of PVDF fluorocarbon powder coating significantly through the optimization of formula and the innovation of semi melting and semi bonding process, and solves the problems of poor surface flatness, impact resistance and industrialization difficulty of existing PVDF fluorocarbon powder coating in China. If you want to get more patent information of domestic coatings, scan QR code and edit wechat message "patent" more open patent information and so on!
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