32results about "Paints for electrolytic applications" patented technology

This invention belongs to the technical field of water-based cathodic electrophoretic coatings, specifically relating to a low-temperature curing cathodic electrophoretic coating with high edge coverage and its preparation method. The preparation method includes: firstly, synthesizing a cationic epoxy resin with allyl double bonds in the side chain as the main resin; then pre-incorporating a phenolic resin oligomer and a quaternary phosphine salt latent base into the resin, followed by neutralization and emulsification to obtain a mother liquor; simultaneously, preparing thermally triggered microcapsules with melamine-formaldehyde as the shell, encapsulating a multifunctional thiol compound and a thermal initiator; finally, incorporating the microcapsules into the resin mother liquor to obtain the final product. This invention successfully solves the technical challenge of simultaneously achieving low-temperature curing and high edge coverage in cathodic electrophoretic coatings. The coating can be completely cured at a low temperature of 148-152℃, with an edge film thickness ratio exceeding 82%, and also exhibits excellent salt spray corrosion resistance exceeding 790 hours, significantly improving the edge protection performance and coating efficiency of the workpiece.

This application relates to a highly water-mark-resistant cathodic electrophoretic emulsion and its preparation method, belonging to the field of electrophoretic coating technology. The preparation method of the highly water-mark-resistant cathodic electrophoretic emulsion includes the following steps: S1. Blocking some isocyanate groups of toluene diisocyanate with a mixture of n-butanol and PEG400, and then reacting and bonding the unblocked isocyanate groups with oleamide resin and polyamine to obtain a polyamine-modified isocyanate curing agent; S2. Performing a ring-opening amination reaction between epoxy resin and a first amine compound, and then adding a second amine compound to continue the reaction to obtain an amine-modified epoxy resin; S3. Grafting the polyamine-modified isocyanate curing agent onto the amine-modified epoxy resin to obtain a cationic epoxy resin; S4. Neutralizing the cationic epoxy resin with an organic acid, adding deionized water for emulsification and dispersion to obtain the highly water-mark-resistant cathodic electrophoretic emulsion. After electrophoretic film formation, the emulsion exhibits good hydrophilicity on the wet film surface, thereby significantly reducing the formation of watermarks during rapid baking.

To provide a cationic electrodeposition coating composition that achieves excellent insulation and edge covering performance suitable for electronic components, and an electronic component having a coating film coated with the cationic electrodeposition coating composition.SOLUTION: The foregoing problem is solved by a cationic electrodeposition coating composition comprising a cationic epoxy resin (A), an organic acid zinc compound (B), and a phenolic compound (C).SELECTED DRAWING: None

The application discloses a kind of artificial sweat-resistant weather-resistant cathode electrophoretic paint and preparation method thereof.The artificial sweat-resistant weather-resistant cathode electrophoretic paint includes the following components by weight: modified acrylic resin 40-50 parts, curing agent 25~30 parts, artificial sweat-resistant auxiliary agent 5~7 parts, weather-resistant auxiliary agent 3~4 parts, acid 2~3 parts, deionized water 2~4 parts.The working solution prepared by the composition of the application is cathodically electrophoretically coated, and the coating film after heat curing has both artificial sweat-resistant performance and weather-resistant performance, with artificial sweat-resistant performance of 96 hours, achieving high-end glasses frame and other materials requiring high weather resistance, artificial sweat resistance and other properties.

The present invention discloses an article comprising a substrate and a corrosion inhibiting coating present on at least part of a surface of the substrate, wherein the corrosion inhibiting coating is a cross-linked inorganic organic hybrid coating comprising at least one functional group R1, wherein R1 comprises one or more functional groups selected from the group consisting of C1-C20 alkyl, C1-C20 cycloalkyl, C1-C10 aryl, amide, amine, mercapto, and epoxy, and substituted with at least one halogen atom, wherein the coating comprises silicon and / or titanium, and is covalently bonded to the metallic element or the alloy thereof by oxygen-silicon bonds or oxygen-titanium bonds, respectively. The invention further discloses a method for producing such an article.

This application relates to the field of electrophoretic coating technology, and discloses a low-temperature curing epoxy cathodic electrophoretic coating and its preparation method. The low-temperature curing epoxy cathodic electrophoretic coating comprises 40-60 parts of cationic epoxy main resin, 10-25 parts of low-temperature blocked isocyanate curing agent, 15-30 parts of pigment and filler paste, 0.5-3 parts of neutralizing agent, 20-40 parts of deionized water, and 0.2-2 parts of additives; the cationic epoxy main resin is an amine-modified bisphenol A type epoxy resin with a number average molecular weight of 2500-5000; the unblocking temperature of the low-temperature blocked isocyanate curing agent is 90-120℃. The preparation method includes a first neutralization, pre-emulsion formation, pre-emulsion maturation, a second neutralization, and a second dispersion step. The low-temperature curing epoxy cathodic electrophoretic coating of this application has good dispersion and stability, and can form a continuous coating film.

This invention discloses a method for preparing a TiB2 coating that inhibits particle agglomeration during electrophoretic deposition, comprising the following steps: First, a fluoride salt mixture is prepared and divided into two parts. One part of the fluoride salt is mixed with boron powder and titanium dioxide powder, heated to form a molten salt, and the upper layer of molten salt is extracted. After rapid cooling, crushing, and grinding, TiB2-fluoride salt composite powder is obtained. Then, the other part of the fluoride salt is heated to form a base molten salt, and the TiB2-fluoride salt composite powder is added to the base molten salt. Electrophoretic deposition is then performed using a ring-shaped graphite anode and a cathode to be deposited. This method prepares highly dispersed TiB2-fluoride salt composite powder through in-situ synthesis, and then uses a ring-shaped anode to reduce the probability of TiB2 particle agglomeration during electrophoresis, effectively inhibiting particle agglomeration and improving the TiB2 electrophoretic deposition efficiency.

This invention relates to the field of coating technology, and more particularly to an electrophoretic coating and a method for low-temperature integrated coating of vehicles. The electrophoretic coating provided by this invention significantly reduces the curing temperature to 130-140℃ by optimizing the resin and curing agent systems, resulting in energy savings of over 15% compared to traditional electrophoretic coating curing systems. Furthermore, the curing agent system of this invention is stable at room temperature, avoiding the storage safety hazards of traditional isocyanate systems. It can also synergistically catalyze at low temperatures, achieving rapid cross-linking and excellent film performance. In addition, the B1B2-based low-temperature integrated coating process for vehicles provided by this invention, utilizing the aforementioned electrophoretic coating in combination with low-temperature adhesive materials, low-temperature first-layer color paint, and low-temperature second-layer color paint, not only solves the problem of color difference between the vehicle body and plastic parts, but also reduces energy consumption, saves time, achieves cost reduction and efficiency improvement, and promotes green transformation, demonstrating promising application prospects.

Disclosed is a method for forming an electrodeposition coating film using a cationic electrodeposition coating material, the method comprising: immersing a metal article to be coated in a cationic electrodeposition coating material containing a cationic resin (A) to perform electrodeposition coating, thereby forming an electrodeposition coating film on the metal article; and heating the electrodeposition coating film to form an electrodeposition coating film having a dry film thickness of 60 μm or more on the metal article.

A method includes: manufacturing an automotive crashworthiness energy absorbing part; and assembling an automotive body by attaching the manufactured automotive crashworthiness energy absorbing part to the automotive body, wherein the manufacturing the automotive crashworthiness energy absorbing part includes: manufacturing a pre-coated part including a tubular member formed using a hat-shaped section member including a top portion and a side wall portion, and a coating part having quality of material with a strength lower than that of the tubular member, the coating part being disposed with a gap of 0.2 mm to 3 mm on an outer surface of a portion including a corner connecting the top portion and the side wall portion in the tubular member to form a coating film; and forming a coating film by forming a coating layer by electrodeposition coating in at least the gap in the pre-coated part, and thermally curing the coating layer.

To provide a modified epoxy resin which is excellent in curability and storage stability at low temperatures when a catalyst of low activity is used, and coating film finishing property and anticorrosion property (throwing power) when constituting a coating; an aqueous resin dispersion where the modified epoxy resin or its modified product is dispersed in an aqueous medium; and a cationic electro-deposition coating containing the modified epoxy resin.SOLUTION: A modified epoxy resin is obtained by reacting compounds containing a compound (α) having one or more epoxy groups, a compound (β) which is used as necessary, has functional groups reactive with an epoxy group, and has the total of functional valences of the functional groups of 3 or more, and a compound (γ) which has functional groups reactive with an epoxy group and has the total of functional valences of the functional groups of 1 or 2, wherein an average polyfunctional degree (X1) represented by the following formula (1) per one molecule of a modified epoxy resin is 0.10 or more. Expression (1): average functional degree (X1)=terminal number per one molecule of modified epoxy resin-2.SELECTED DRAWING: None

To form a coating film on a sealer part without applying dry processing of the sealer part when laminating the coating film on the sealer part, improve adhesion between the sealer part and the coating film, and suppress slipping of the coating film.SOLUTION: A method according to the present invention comprises: a process in which an electro-deposition film 2 is formed on a coated object 1; a process in which a sealer coating film 3 containing a plasticizer 8 is formed on the electro-deposition film; and a process in which an undercoat coating film 4 is formed on the sealer coating film in a non-dry state. In the process in which the undercoat coating film is formed on the sealer coating film, a paint for forming the undercoat coating film contains a dilution solvent, the dilution solvent has a functional group same as the plasticizer which the sealer coating film contains, an SP value, which is a solubility parameter, falls within a range of ±0.6 with respect to an SP value of the plasticizer, and an evaporation rate (a relative evaporation rate when a standard butyl acetate evaporation rate is 100) is 100 or more.SELECTED DRAWING: Figure 1

To provide an article comprising a substrate comprising a corrosion-inhibiting coating having excellent adhesion to the substrate. do. The present invention relates to a substrate and a corrosion-inhibiting coating present on at least a portion of the surface of the substrate. and the corrosion-inhibiting coating comprises at least one functional group R 1 Contains Crosslinked inorganic-organic hybrid coating, R 1 is C1-C 20 Alkyl, C1-C 20 S alkyl, C1-C 10 Aryl, amide, amine, mercapto, and epoxy and further comprising at least one halogen atom. The coating contains silicon and / or titanium and has oxygen-silicon bonds or oxide bonds. The present invention further provides a method for producing a titanium-based alloy comprising the steps of: This application discloses a method for making such an article.

Disclosed is a method for forming an electrodeposition coating film using a cationic electrodeposition coating material, the method comprising: immersing a metal article to be coated in a cationic electrodeposition coating material containing a cationic resin (A) to perform electrodeposition coating, thereby forming an electrodeposition coating film on the metal article; and heating the electrodeposition coating film to form an electrodeposition coating film having a dry film thickness of 60 μm or more on the metal article.

This invention discloses a method for preparing amphoteric electrodeposition photoresist on a metal surface, specifically including the following steps: Step 1, synthesizing cashew nut shellac monomer; Step 2, preparing an amphoteric resin; Step 3, preparing an electrophoretic coating; Step 4, electrophoretically depositing photoresist on a conductive substrate. This invention also discloses the preparation method and application of amphoteric electrodeposition photoresist on a metal surface. This invention solves the problems of existing photoresists causing complex formation due to strong alkalis, corrosion of metal circuits by strong acids, and swelling of the photoresist film.

The present disclosure relates to a cationic, fire-resistant, electrolytically depositable coating composition comprising: a film-forming component; a hybrid organic-inorganic material; and an inorganic pigment. Also disclosed are methods for using such fire-resistant, electrolytically depositable coating compositions to coat at least a portion of a substrate and substrates coated by such methods.

This invention relates to a cathodic electrophoretic emulsion with gloss retention after baking and its preparation method, belonging to the field of electrophoretic coating technology. The preparation method of the electrophoretic emulsion includes the following steps: S1, reacting an aliphatic or alicyclic diisocyanate with a hydroxyl-containing compound and then blocking it with an oxime blocking agent to obtain a blocked isocyanate crosslinking agent; S2, modifying a bisphenol-type epoxy resin through ring-opening chain extension with mixed amines, fatty acid amidation modification, and crosslinking enhancement with phenolic resin to obtain a multi-modified resin; S3, blending the two and neutralizing with an organic acid; S4, emulsifying and dispersing to obtain the cathodic electrophoretic emulsion. After electrophoretic coating, the obtained emulsion exhibits a gloss retention rate of ≥95% after baking at 200℃ for 30 minutes, while also possessing excellent mechanical properties and corrosion resistance.

Provided is a cationic electrodeposition coating composition having good anti-cratering performance. A cationic electrodeposition coating composition comprising a coating film-forming resin (A), a metal compound (B) containing a trivalent metal element, and a silicone compound (C), wherein a content of the metal compound (B) is 0.03 parts by mass or more and less than 4 parts by mass in terms of a metal element based on 100 parts by mass of a resin solid content of the coating film-forming resin (A), and a content of the silicone compound (C) is 0.005 parts by mass or more and 4.5 parts by mass or less based on 100 parts by mass of the resin solid content of the coating film-forming resin (A).

This application relates to a low-heat-weight-loss cathodic electrophoretic emulsion, its preparation method, and its application, belonging to the field of electrophoretic coating technology. The preparation method includes the following steps: S1. Blocking some isocyanate groups of toluene diisocyanate with a mixture of n-butanol and polyether polyol, then reacting and bonding the unblocked isocyanate groups with a polyamide resin to obtain a self-crosslinking polyamide resin; S2. Performing an esterification polycondensation reaction between a diester compound and a polyol component to obtain a polyester resin; S3. Performing a ring-opening amination reaction between an epoxy resin and an amine compound to obtain an amine-modified epoxy resin; S4. Grafting the self-crosslinking polyamide resin onto the amine-modified epoxy resin; S5. Physically mixing the polyester resin with the product of step S4, neutralizing with an organic acid, and dispersing with water to obtain the low-heat-weight-loss cathodic electrophoretic emulsion. The electrophoretic emulsion provided by this application has a low-heat-weight-loss effect, making it more environmentally friendly and efficient.

To provide a method for analyzing quality defects in workpieces, which are vehicle bodies and / or vehicle add-on parts, particularly after and / or during a production process in process engineering plants, preferably after and / or during a painting process in painting plants, by means of which quality defects can be avoided and / or by means of which the causes of quality defects in the production process can be identified, avoided and / or remedied, it is proposed according to the invention that the method comprises the following: - Creating a workpiece-specific data set uniquely assigned to a vehicle body and / or a vehicle add-on part at the beginning of a production process, particularly at the beginning of a painting process, and / or creating a workpiece carrier-specific data set uniquely assigned to a workpiece carrier at the beginning of a production process.especially at the beginning of a painting process; - Supplementing the workpiece-specific data set while a vehicle body and / or a vehicle add-on part undergoes the production process, especially the painting process, with process data that is particularly relevant to quality; and / or supplementing the workpiece carrier-specific data set while a workpiece carrier undergoes the production process, especially the painting process, with process data that is particularly relevant to quality; - Storing the workpiece-specific data set in a database; and / or storing the workpiece carrier-specific data set in a database, wherein the process data that is particularly relevant to quality, by means of which a workpiece-specific data set and / or a workpiece carrier-specific data set is supplemented, includes, in particular, quality-relevant process data.One or more of the following process parameters are used: - Target time overruns in process steps of the production process; - Events occurring during the execution of a process step of the production process; - Body-in-white quality data of a respective vehicle body and / or a respective vehicle add-on part; - Anomalies and / or deviations in the production process; - Weather data; - Personal data of persons who were involved in the process step during the execution of a process step of the production process, and wherein the procedure is carried out in a process engineering plant, in particular in a paint shop, which comprises several different treatment stations in which one or more process steps of the production process, in particular the painting process, can be carried out.

To provide a magnesium surface treatment process that can form a coating on magnesium materials that provides good appearance, corrosion resistance, and moisture resistance. [Solution] A magnesium material surface treatment process comprising: a pretreatment step of treating the magnesium material with a pretreatment agent; a chemical conversion step of chemically treating the magnesium material after the pretreatment step; and an anionic electrodeposition coating step of anionic electrodeposition coating the magnesium material after the chemical conversion step, wherein the pretreatment agent contains an amino group-containing compound and has a pH of 6.0 or more and less than 12.0; and the anionic electrodeposition coating step comprises an electrodeposition coating step of immersing the magnesium material in an anionic electrodeposition coating composition and applying a voltage to form an electrodeposited coating film, and a heat curing step of heating and curing the electrodeposited coating film formed in the electrodeposition coating step to form a cured electrodeposited coating film.

Disclosed herein are an aqueous dispersion including cationic polyvinyl alcohol modified polymer particles, an aqueous electrocoating material containing the dispersion and a process to produce an at least partially coated substrate using the aqueous electrocoating material. The aqueous dispersion can be prepared by reacting an intermediate including at least one polyvinyl alcohol polymer chain with a compound including at least one epoxide group and a least two blocked primary amino groups. Aqueous coating compositions including the aqueous dispersion result in improved leveling properties during film formation as well as an improved edge protection of the substrate without negatively influencing the surface roughness and adhesion as well as the deposition properties.

The application discloses a low-roughness dispersion resin for electrophoretic paint, preparation of the dispersion resin and an electrophoretic color paste, electrophoretic paint containing the dispersion resin. The dispersion resin comprises 8.91-9.60 parts by weight of aromatic epoxy resin, 12.00-13.09 parts by weight of aliphatic epoxy resin, 2.53-3.01 parts by weight of bisphenol A, 2.07-2.27 parts by weight of iso-octanoic acid, 0.06-0.08 parts by weight of a catalyst, 1.99-2.30 parts by weight of a primary amine, 0.85-0.96 parts by weight of a neutralizing agent and 66.56-73.80 parts by weight of pure water. The electrophoretic paint prepared from the dispersion resin has excellent edge protection capability and low surface roughness, and can meet the requirements of a whole vehicle body on a bottom electrophoretic coating under current zirconium or silane thin film pretreatment conditions.

A cationic electrodeposition coating composition may contain at least two or more different emulsions in a mixed state, in which one of the emulsions is an emulsion (A) of an amine-modified epoxy resin containing a primary amino group or a secondary amino group, and another one of the emulsions is an emulsion (B) of an epoxy compound not containing a primary amino group and a secondary amino group and containing two or more epoxy groups in one molecule. A method for producing said coating composition may include a step of mixing the emulsions (A) and (B). A coating method may be performed in conjunction with the producing method by immersing a metal object in said coating composition and then finishing the coating by drying.

A two-part polyurethane system is provided. The system includes a resin and a crosslinker component. The resin has units obtained from a polyol and a polyisocyanate. The polyol has free carboxyl groups and from 0.5% to 3% by weight of free hydroxyl groups. The polyisocyanate has ‑NCO groups reactive with the free hydroxyl groups of the polyol in amounts to provide a molar ratio of -NCO / -OH of from 0.1 to 0.3 such that the resin thus formed contains minimal free hydroxy groups and sufficient free carboxyl groups to provide an acidity from 5-50 KOH / g. The crosslinker component includes a carbodiimide compound, polyaziridine compound, or a combination thereof. The crosslinker component is configured to react with the free carboxyl groups of the resin to form a cured polyurethane coating.

This invention discloses a high weather-resistant polyurethane coating, comprising the following raw materials in parts by weight: 50-70 parts of component A polyurethane coating, 30-40 parts of component B polyurethane coating, and 4-11 parts of weather-resistant additives. The invention also discloses a method for preparing the high weather-resistant polyurethane coating, comprising the following steps: S1, preparing component A polyurethane coating; S2, preparing component B polyurethane coating; S3, mixing component A and component B polyurethane coatings, placing them in a constant-temperature reactor, filling the reactor with inert gas, starting the reactor for stirring and heating, ensuring thorough mixing and reaction, stirring until homogeneous, adding the weather-resistant additives, mixing and stirring again, filtering, and then dispersing the coating using a high-speed disperser to obtain the desired high weather-resistant polyurethane coating. This method for preparing the high weather-resistant polyurethane coating combines cathodic electrophoretic coating technology with weathering technology and is suitable for surface coating of metal substrates.

This disclosure relates to an electrodepositable coating composition comprising: an active hydrogen-containing ionic base-containing film-forming polymer; a curing agent; an organic resin component different from the active hydrogen-containing ionic base-containing film-forming polymer and the curing agent, wherein the organic resin component has an aliphatic content of at least 60% by weight based on the total weight of the organic resin component; a curing catalyst that is substantially, essentially, or completely tin-free, and / or includes a bismuth-containing curing catalyst, an amine-containing curing catalyst, a zinc-containing curing catalyst, a zirconium-containing catalyst, a cerium-containing catalyst, an amidine-containing catalyst, an imidazole-containing catalyst, and / or a titanium-containing catalyst; and a calcined clay pigment. Also disclosed are the electrodepositable coating composition, a method for coating a substrate, and the use of the electrodepositable coating composition.

The application belongs to the technical field of paint. The application relates to a kind of photo-polymerization self-initiation polyimide electrophoretic paint and a preparation method thereof, which comprises the following raw materials by weight: polyimide solution 25-35 parts; neutralizing agent 0.5-1.0 parts; alcohol or ketone 5.0-10.0 parts; water 70-85 parts; wherein, the polyimide contains a photo-polymerization self-initiation group. The above raw materials are mixed and stirred to prepare paint by paint preparation process, which can effectively solve the problem of corrosion caused by shrinkage and exposure to bottom when existing electrophoretic paint is used to coat complex metal components and is cured by high-temperature baking due to the reduction of resin viscosity, and has great application prospect.

This invention relates to a cathodic electrophoretic coating emulsion for preventing paint cracking during perforation and its preparation method, belonging to the field of electrophoretic coating technology. The preparation method includes the following steps: S1. Blocking some isocyanate groups of toluene diisocyanate, and then reacting and bonding the unblocked isocyanate groups with polyamide resin to obtain a self-crosslinking polyamide resin; S2. Amination reaction of epoxy-terminated polybutadiene rubber with a first amine compound to obtain amino-modified polybutadiene liquid rubber; S3. Ring-opening amination reaction of epoxy resin with a second amine compound to obtain amine-modified epoxy resin; S4. Grafting the self-crosslinking polyamide resin onto the amine-modified epoxy resin to obtain grafted resin; S5. Physically mixing the amino-modified polybutadiene liquid rubber and the grafted resin, neutralizing with organic acid, and dispersing with water to obtain the cathodic electrophoretic coating emulsion. This method solves the problem of edge cracking and peeling of existing electrophoretic coatings after secondary mechanical processing such as perforation.