3053results about "Polyester coatings" patented technology

The invention discloses a high-bio-based PHA-acrylate emulsion paint as well as a preparation method and application thereof, and belongs to the technical field of water-based paints. The film former of the latex paint comprises 60% to 90% of polyhydroxyalkanoate (PHA) with a moderate crystallinity of 40% to 60%, and 10% to 40% of a specific bio-based acrylate copolymer with a Tg of not higher than 5 DEG C. According to the invention, a core-shell microstructure in which a rigid PHA phase is wrapped by a flexible acrylate phase is constructed through a key process including ultrasonic treatment. According to the structure, low-temperature film forming can be achieved without a VOC coalescing agent, the bio-based content of an obtained paint film is higher than 70%, the VOC content is lower than 0.5 g / L, the scrub resistance is larger than 7000 times, and the technical problem that high bio-based content and high performance of a PHA coating are difficult to achieve at the same time is solved.

The invention discloses a green preparation process of a microwave-assisted synthesized perovskite semiconductor material, which aims at solving the problems of long reaction period, large reagent dosage, heavy pollution and the like of the traditional perovskite preparation process, adopts a novel organic-inorganic hybrid precursor and green solvent system, and accelerates the reaction by microwave radiation. The rapid and environment-friendly synthesis of the material is realized by accurately regulating and controlling microwave parameters and combining multiple processes such as intermittent and collaborative ultrasonic processes. Novel compounds such as nitrogen-containing heterocyclic borate and organic phosphonate are introduced to optimize the performance of the material. The process significantly shortens the preparation period, reduces reagent consumption, improves photoelectric properties, and enhances material stability.

The present invention relates to the technical field of water-based coatings, and specifically to a PHA water-based coating, a preparation method and application thereof. The PHA water-based coating comprises the following raw materials: a PHA water-based dispersion, an emulsifier, a thickener, a film-forming aid and a leveling agent; wherein the PHA water-based dispersion is obtained by a PHA fermentation broth through a wall-breaking treatment. The present invention directly prepares the PHA water-based coating by using the PHA water-based dispersion obtained by fermentation and wall-breaking treatment upstream, and can prepare a PHA water-based coating that is not easy to settle, has good storage stability, is uniformly dispersed and has a small particle size.

The invention discloses a pure bio-based PHA aqueous dispersion as well as a preparation method and application thereof, and belongs to the technical field of pure bio-based polymer aqueous dispersion. According to the dispersion, polyhydroxyalkanoate is used as a unique film forming matter, Pickering solid particles and a natural surfactant are adopted for synergistic stabilization, and a bio-based plasticizer can be selected. The emulsion or slurry with the polyhydroxyalkanoate content of 40-85wt% and the particle size of 0.2-3m is prepared through a melting high-pressure homogenization method, a low-temperature wet grinding method or a solvent replacement method. The coating does not contain petrochemical polymer protective colloid and perfluorinated and polyfluoroalkyl substances, and the bio-based content is greater than or equal to 99%. Due to the excellent stability, rheological property and film-forming property of the modified starch, the modified starch becomes an ideal basic material for constructing a multi-layer programmable controlled release and degradation functional coating system, can be used in the fields of paper-based barrier coatings, adhesives, advanced crop seed coats and the like, realizes excellent barrier, bonding and controlled release properties, meets the industrial compost and repulping property standards, and has wide application prospects. The method has green, environment-friendly and industrial potential.

The invention discloses a multi-layer controllable degradation coating composition as well as a preparation method and application thereof, and belongs to the field of biodegradable high polymer materials and coating compositions. The coating composition comprises an outer protective layer and an inner functional layer, and the inner functional layer is arranged between a substrate and the outer protective layer and comprises a plurality of microcapsules. The key innovation lies in that the microcapsule encapsulates an enzyme capable of catalytically degrading the outer protective layer and is configured to be released after a predetermined delay time. The pH buffer system is integrated in the inner functional layer, and an optimal catalytic microenvironment is created for released enzyme, so that the outer protective layer is actively and quickly degraded, and programmable time-controlled removal is realized. The problem that the degradation rate of an existing biodegradable material is passive and uncontrollable is solved, and the coating has a remarkable application value in the field of seed coating or fertilizer controlled release by endowing the coating with a unique two-stage degradation characteristic.

The invention provides a PHA dispersion emulsion as well as a preparation method and application thereof, and belongs to the field of high polymer materials. The invention aims to solve the technical problem that the prior art cannot simultaneously meet the requirements of the polyhydroxyalkanoate water dispersion system on extremely low temperature natural film-forming property, excellent comprehensive performance after film formation and long-term storage stability. The method is characterized in that a polyhydroxyalkanoate polymer with specific molecular weight and polydispersity index range, a coalescing agent 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate with a specific chemical structure and a specific type of aliphatic polyisocyanate cross-linking agent compatible with water dispersion are strictly limited and combined. Through the synergistic effect generated by the unique ternary combination, the minimum film forming temperature of the prepared emulsion can be reduced to 6-10 DEG C, a film can be naturally formed without hot pressing, and the formed film has excellent mechanical property, water resistance and adhesive force and has excellent storage stability of at least one year.

The invention relates to a nano-diamond coating, a coating and application thereof, and belongs to the technical field of coatings and surface engineering. The nano-diamond coating provided by the invention is prepared from the following raw materials: resin, a curing agent and organic fluorosilane modified nano-diamond, the organic fluorosilane modified nano-diamond is prepared from raw materials including organic fluorosilane and nano-diamond. According to the invention, the organic fluorosilane is adopted to modify the nano-diamond, the unique physicochemical characteristics of the nano-diamond can be utilized to construct a firm and wear-resistant coating, and the application limitation of the existing amphiphobic coating, especially a super-amphiphobic coating, is broken through; meanwhile, the nano-diamond can spontaneously migrate to the surface in a resin system through modification of the organic fluorosilane, the surface of the coating is endowed with amphiphobic performance and even super-amphiphobic performance, the paint and the coating which are excellent in wear resistance, self-cleaning performance, corrosion resistance and antifouling performance are finally obtained, the preparation process is simple and rapid, and the preparation method is suitable for industrial production. The cost is low, and large-scale production can be realized.

The invention discloses a PHA nano aqueous suspension as well as a preparation method and application thereof, and belongs to the field of high polymer materials and processing and application thereof. The suspension takes PHA resin as a dispersion phase and water as a continuous phase, the total solid content is 23-65wt%, the PHA resin accounts for 80-98.5 wt% of the total solid, and the assistant accounts for 1.5-20wt% of the total solid. The average particle size of PHA particles is 30-140 nm, D90 is smaller than or equal to 150 nm, the polydispersity index PDI is smaller than 0.3, and when the pH is 6.5-7.5, the absolute value of Zeta potential is larger than 30 mV. The preparation method comprises the following steps: pretreating the PHA raw material, preliminarily dispersing in a water phase under the action of the dispersion stabilizing aid, and carrying out high-energy homogenization treatment. The obtained suspension is stable in storage, has excellent barrier property and mechanical property after film formation, and is suitable for preparing biodegradable food packaging barrier coatings, water-based environment-friendly coatings and water-based adhesives.

Provided is a laminate layered body capable of forming a laminate layered body configured from a type of resin that exerts a small environmental load, the laminate layered body being provided with gas barrier properties required for a packaging material and being capable of performing seal processing by heat seal processing in a short time.　This laminate layered body is composed of a gas barrier layered film and a sealant film, wherein the laminate layered body is characterized in that: the gas barrier layered film is provided with a stretched polypropylene resin substrate and a gas barrier layer comprising a thin inorganic film; and the laminate layered body has a seal strength of 20 N / 15 mm or greater when heat-sealed for 0.5 seconds at a temperature of 170°C, and has an oxygen permeability of 10 mL / m2·day·MPa or lower after retort treatment for 30 minutes at 120°C.

The present invention relates to a method for manufacturing a PHA (polyhydroxyalkanoate) coated fiber-based substrate, said method comprising the steps: a) providing a fiber-based substrate having a first main surface and a second 5 main surface and having a moisture content in the range of 4-10 wt%; b) forming a first PHA layer by applying a first aqueous coating composition comprising a first PHA having a melting point in the range of 120-180 °C on the first main surface and drying the first aqueous coating composition at a first drying temperature in the range of 90-130 °C and at least 20 °C below the melting point 10 of the first PHA.

The invention belongs to the technical field of iodine-resistant material preparation, and particularly discloses a high-barrier composite packaging material and a preparation method thereof.The high-barrier composite packaging material is composed of an aluminum foil layer, a vinyl resin heat-seal coating, a composite coating, a VC glue coating, a polyurethane heat-seal coating and a polyvinyl chloride sheet from top to bottom; wherein the composite coating is obtained by coating a coating liquid, and a preparation method of the coating liquid comprises the following steps: (1) adding PVA resin into deionized water, stirring, then adding a first part of functional particles, and heating and stirring to obtain a solution I for later use; (2) adding polylactic acid into the mixed solution, stirring, then adding the second part of functional particles, and heating and stirring to obtain a solution II; and (3) adding the obtained solution I into the obtained solution II, and uniformly stirring. The iodine-resistant packaging material prepared by the invention is good in iodine resistance, oxygen resistance and water vapor resistance, good in tensile strength and excellent in comprehensive performance.

The invention discloses a water-based weather-resistant mildew-proof coating and a preparation method and application thereof.The mildew-proof coating comprises a water-based coating, organic mildew-proof agent missible oil and an inorganic nano-material, the water-based coating comprises water-based acrylic resin and alkyd resin, the mass ratio of the water-based acrylic resin to the alkyd resin is (20-25): 1, the organic mildew-proof agent missible oil is 1: 1, and the inorganic nano-material is 1: 1. The inorganic nano material comprises at least one of nano titanium dioxide, nano zinc oxide and nano silicon dioxide. The preparation method comprises the following steps: mixing the water-based paint, the organic mildew preventive missible oil, the inorganic nano-material, the coalescing agent, the nonionic surfactant and the deionized water to form a mixed solution, and emulsifying the mixed solution under a water bath condition of 50-60 DEG C to obtain the water-based weather-resistant mildew-proof paint. The stability and the storage stability of the mildew-proof coating are at least doubled compared with those of an existing scheme, and the mildew-proof performance is improved by 80% or above.

The invention relates to the technical field of titanium dioxide, and discloses a preparation process of oil paint core-coated titanium dioxide, which comprises the following steps: a core layer is rutile type titanium dioxide particles with the particle size range of 0.1-0.5 mu m and the specific surface area of 8-15m < 2 > / g, an inorganic coating layer is composed of silicon dioxide and aluminum oxide according to the mass ratio of 1: (0.2-1.5), the coating thickness is 5-15% of the diameter of the core layer, and the inorganic coating layer is composed of silicon dioxide and aluminum oxide according to the mass ratio of 1: (0.2-1.5). Wherein the silicon dioxide is coated by a hydrolytic deposition method, the aluminum oxide is coated by a sol-gel method, the organic coating layer comprises a copolymer containing a silane coupling agent and organic silicon resin, the organic silicon resin is methyl phenyl silicon resin, the organic coating layer accounts for 1-8% of the total mass of the titanium dioxide, and the surface contact angle of the organic coating layer is greater than or equal to 110 degrees. According to the preparation process of the oil paint core-coated titanium dioxide, an inorganic-organic gradient coating system is constructed, so that the core-coated titanium dioxide has a gloss retention rate of more than 95% (ASTM D523) and a delta E color difference of less than 1.5 (ISO 7724) after 1000 hours in a QUV accelerated aging test, and the weather resistance of the core-coated titanium dioxide is improved by more than 3 times compared with that of the traditional titanium dioxide.

To provide a thermoplastic resin composition for fused deposition modeling, capable of obtaining a modeled body which is excellent in modeling performance and antistatic performance, which can be colored into various colors, and which has diverse design properties, a modeled body which is obtained with the thermoplastic resin composition by fused deposition modeling, and which not only is excellent in antistatic performance and but also has excellent design properties by coloration, and a method for producing the modeled body. A thermoplastic resin composition for fused deposition modeling, containing 3 to 45 parts by mass of one or more kinds of a polymeric compound (G) having the following polyether segment (A) and polymer segment (B), based on 100 parts by mass of a thermoplastic resin:Polyether segment (A): a polyether segment derived from a compound (a) having one or more ethyleneoxy groups and having a hydroxyl group at each of both ends;Polymer segment (B): one or more polymer segments selected from the group consisting of a polyester segment (D) and a polyamide segment (E).

The invention discloses a method for enhancing the interface performance of a carbon fiber composite coating through two-step chemical reaction synergistic modification, modified carbon fibers and application. The method comprises the following steps: carrying out silanization modification treatment and hyperbranched modification treatment on carbon fibers subjected to oxidation treatment to prepare the modified carbon fibers. The method for enhancing the interface performance of the carbon fiber composite coating through two-step chemical reaction synergistic modification is suitable for improving the interface performance of the carbon fiber composite coating, and the prepared modified carbon fiber is mixed with resin and a curing agent and cured; the obtained carbon fiber reinforced composite coating has excellent mechanical properties, wear resistance and erosive wear resistance, and can effectively reduce damages such as corrosion, erosive wear and the like of complex and harsh marine environments such as a spray splashing area and the like to steel structure facilities.

The invention provides a leather product and a method for manufacturing the leather product. The leather article comprises a substrate and a coating comprising a cellulose derivative with improved color fastness to rubbing, the cellulose derivative may be methylcellulose, ethylcellulose, ethylmethylcellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl methylcellulose, hydroxypropyl methylcellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose, or carboxymethyl cellulose. The cellulose acetate-cellulose acetate composite material is prepared from ethyl hydroxyethyl cellulose, cellulose acetate, cellulose triacetate, cellulose propionate, cellulose acetate propionate, cellulose acetate butyrate, microcrystalline cellulose, cellulose nitrate or cellulose sulfate.

A dispersion coated paperboard (1) for food packaging applications, the coated paperboard comprising a paper or paperboard substrate (2) having a first side (2a) and a second side (2b). The paper coated paperboard (1) further comprises a first layer (3) coated with a PHA dispersion, the first layer (3) being coated on at least one side (2a, 2b) of the paperboard substrate (2); and a second layer (4) coated with a PHA dispersion, said second layer (4) being coated on at least one of said first layers (3) wherein the crystallinity of the second layer (4) is higher than the crystallinity of the first layer (3).

The present invention relates to a biodegradable coating composition, a method for preparing same, and a biodegradable article using same. Particularly, according to an embodiment of the present invention, a biodegradable coating composition is a copolymerized polyhydroxyalkanoate (PHA) resin comprising a PHA resin, a surfactant, inorganic particles and a rheology modifier, and including 4-hydroxybutyrate (4-HB) repeating units. By using a PHA resin having a weight average molecular weight of 10,000-1,200,000 g / mol, the biodegradable coating composition is environmentally friendly due to excellent biodegradability and biocompatibility, and can have improved dispersibility, coatability, oil resistance and processability.

A wood preservative composition comprising 4,5-dichloro-2-octylisothiazol-3(2H)-one, a method of treating a wood substrate therewith, and a wood product produced therefrom are provided. The wood preservative composition comprises at least 0.5% by weight of DCOI based on the total weight of the composition and a retaining additive comprising a solvent-borne polymeric resin, N a wax, or a combination thereof. A weight ratio of the DCOI to the retaining additive in the composition is in a range of 1:5 to 5:1.

The invention discloses a PHA-acrylic acid structural unit water-based dispersion based on interface engineering regulation and control, a preparation method thereof and application of a paper-based barrier coating, and belongs to the technical field of high polymer materials, interface engineering and water-based coatings. The stable interface layer is constructed in situ between the crystalline PHA and the acrylic resin through the amphiphilic polymer, so that the problems of poor compatibility and film forming defects of a bio-based material are effectively solved. The dispersion can realize excellent waterproof, oil-proof and gas barrier effects by only needing a relatively low coating weight, and the material consumption is remarkably reduced. The unique gradient structure of the coating has excellent mechanical adhesive force and efficient re-pulping and recycling characteristics, and the technical defect that a traditional barrier coating is difficult to recycle is overcome. And an ideal solution with high performance and high safety is provided for green packaging.

A polyhydroxyalkanoate (PHA) water-based coating, a preparation method therefor, and a use thereof. The coating comprises a PHA suspension and an auxiliary agent, wherein the melting point of PHA is 100-120°C, and the PHA is a copolymer containing at least two polymerization monomers. By selecting the PHA meeting specific conditions, the obtained coating is environment-friendly and degradable, and the prepared coated paper can be directly pulped and recycled. The coated paper has good comprehensive performance in terms of stable standing, temperature resistance, oil resistance, environment friendliness, and coating flatness, and can meet the requirement for containing high-temperature liquids.

Provided herein are powder formulations for a primer coat and a topcoat, and methods of applying the powder formulations to at least a portion of a surface of a substrate. Such methods can include applying a powder formulation to a substrate for a topcoat alone or in combination with a primer coat, and then heating the substrate, thereby forming a cured coating on at least the portion of the surface of the substrate. Such heating can be conducted in a single cure step to provide the cured coating including a cured topcoat alone or in combination with a cured primer coat.

The present invention relates to a method of making a PHA (polyhydroxyalkanoate) coated fiber-based substrate, the method comprising the steps of: a) providing a fiber-based substrate having a first major surface and a second major surface; b) forming a first PHA layer by applying a foamed first aqueous coating composition comprising a first PHA and a blowing agent on the first major surface and drying the foamed first aqueous coating composition, wherein the foamed first aqueous coating composition is a foam having a foam density of 0.75 g / cm3 or less; c) forming a second PHA layer by applying a second aqueous coating composition comprising a second PHA on the first PHA layer and drying the second aqueous coating composition The invention also relates to a PHA coated fiber-based substrate and a packaging container comprising a PHA coated fiber-based substrate.

The invention relates to the technical field of food packaging materials, in particular to a cerium dioxide nano-enzyme modified antibacterial coating and application of the cerium dioxide nano-enzyme modified antibacterial coating in food packaging. The biomimetic mineralization layer comprises the following components in percentage by weight: 35-45% of a green base material, 8-12% of dopamine modified yttrium-doped cerium dioxide nano-enzyme, 4-6% of a composite antibacterial agent, 3-4% of a natural cross-linking agent, 2-3% of a degradable plasticizer, 1-2% of a biomimetic mineralization layer precursor and the balance of deionized water, the green base material is a blend of a chitosan-polyethylene glycol graft and polylactic acid; the doping amount of Y3 in the nano enzyme is 3-4at%. The antibacterial agent is excellent and lasting in antibacterial effect, has no migration risk of the antibacterial agent, and can guarantee food safety; a green base material and a degradable plasticizer are adopted, so that natural degradation is realized, and environmental pollution is avoided; the mechanical property is good, the aging resistance is realized, and the oxygen barrier property is strong; the food packaging box is suitable for various foods, effectively prolongs the shelf life, and meets the requirement of green packaging.

The invention relates to an ultraviolet deoxidizing and fresh-keeping packaging material and application thereof, and belongs to the technical field of packaging materials. According to the invention, trimethylolpropane triacrylate and ethylenediamine are used as raw materials, a hyperbranched polymer with terminal double bonds is constructed based on Michael addition, then a sulfydryl-containing hindered amine light stabilizer obtained by ester exchange of methyl thioglycolate and pentamethylpiperidinol is added, and the hindered amine light stabilizer and alkyl mercaptan are subjected to a sulfydryl-alkene click reaction together. The light stabilizer and plastic are subjected to melt blending and then subjected to curtain coating to form a film to serve as an outer layer, and one face of the outer layer is coated with coating liquid prepared from a dispersing agent, PET, an active substance capable of generating triplet excitons under irradiation of ultraviolet light, an antioxidant, an ultraviolet light absorber and a stabilizer. When the ultraviolet deoxidization fresh-keeping packaging material is applied to packaging of articles, deoxidization can be achieved through irradiation of ultraviolet light, and the degradation effect of the ultraviolet light on the outer layer is very little.

The invention discloses a high-corrosion-resistance powder coating and a preparation method thereof, and belongs to the technical field of powder coatings. Through modification of the resin system, the ultraviolet absorbent modified epoxy resin and the weather-resistant polyester resin are compounded, so that the ultraviolet resistance and the weather resistance of the resin system are remarkably improved, and the corrosion resistance reduction caused by light aging is avoided; the flake graphene forms an excellent physical barrier to block corrosion medium permeation, then chemical passivation of zinc phosphate is combined to inhibit electrochemical corrosion, the synergistic effect is achieved, the corrosion resistance is synergistically enhanced from the physical and chemical angles, the path of the corrosion medium is further prolonged in combination with the laminated structure of the glass flakes, and the corrosion resistance is improved. And meanwhile, the filler A and the filler B can also play a role in enhancing the mechanical strength of the coating, so that the powder coating with high corrosion resistance can be obtained on the whole.

The invention relates to the technical field of electroplating primers, and particularly discloses an anti-burst electroplating primer and a preparation method thereof. The invention relates to an anti-burst electroplating primer which comprises the following components in parts by weight: 8-12 parts of bifunctional polyurethane acrylate; 20 to 25 parts of trifunctional polyester acrylate; 10 to 15 parts of modified epoxy acrylic resin; 13 to 20 parts of a UV monomer; 4-6 parts of a photoinitiator; 0.1 to 0.2 part of a leveling agent; and 33-45 parts of a solvent. The anti-burst electroplating primer disclosed by the invention can be used for the surface of a plastic base material such as a PET material, has the advantages of no burst in a free falling body with the height of 80cm and adhesive force of more than level 1, endows a subsequent electroplated layer with good adhesive force and reduces the burst problem of a product under pressure.

A tape measure including an elongate tape blade is shown. The tape measure includes a relatively short protective polymer film coupled to an end of the tape blade adjacent to the hook end of the tape blade.

The present invention belongs to the technical field of alkyd resin coatings, and discloses an alkyd external enamel and a preparation method thereof. The present invention adopts a bio-based high flash point alkyd resin as a base resin, adopts nano titanium dioxide, nano zinc oxide, nano aluminum oxide and micron aluminum oxide with different particle size distributions for compounding, and adds isocyanate silane and glycerol ether silane in the system. After grinding, the pigments and fillers can be modified to improve the filling and modification effect of the pigments and fillers. At the same time, the active groups such as isocyanate groups, epoxy groups, and hydroxyl groups in the coupling agent can interact with the alkyd resin to improve the compatibility of the pigments and fillers with the alkyd resin, and give the coating film excellent adhesion to the inorganic substrate. With a high flash point solvent, a bio-based coating with high flash point, high adhesion, high aging resistance and high wear resistance can be prepared to meet the use requirements of the external enamel. The alkyd external enamel is environmentally friendly and safe, and can be stored and transported according to general chemicals.

The application belongs to the technical field of paint, and particularly relates to a high-weather-resistance acrylic paint and a preparation method thereof. The high-weather-resistance acrylic paint comprises the following components and weight fractions: 25-40 parts of water-based acrylic resin, 10-20 parts of functional resin, 10-25 parts of modified filler of shea butter oil, 0.1-0.5 parts of defoaming agent, and 20-40 parts of water; the functional resin is water-based polyurethane modified alkyd resin; and the filler at least comprises pyrophyllite powder and nano titanium dioxide. The acrylic paint provided by the application has excellent weather resistance, adhesion, wear resistance and good thermal stability.