25results about How to "Curing shrinkage is small" patented technology

The application belongs to the technical field of putty, and particularly relates to a high-temperature-resistant CHPO curing putty with good polishing performance and a preparation method thereof. The high-temperature-resistant CHPO curing putty with good polishing performance comprises an A component and a B component. The A component comprises the following raw materials in parts by weight: linseed oil modified unsaturated polyester resin 140-160 parts, oleic acid modified air-drying unsaturated polyester resin 40-60 parts, dicyclopentadiene modified unsaturated polyester resin 90-110 parts, styrene 30-40 parts, drier 5-8 parts, accelerator 0.1-1.2 parts, dispersant 3-5 parts, thixotropic agent 8-12 parts, titanium white powder 12-16 parts, talc powder 400-500 parts, and pre-expanded polymer microspheres 5-10 parts. The application effectively solves the problems of poor polishing performance, poor adhesion to water-based epoxy primer and poor high-temperature resistance of traditional CHPO curing putty.

The invention relates to the technical field of battery shell materials, and particularly discloses a high-temperature-resistant fireproof epoxy material for a composite battery shell material. The flame-retardant epoxy resin paint is prepared from the following raw materials: 20-30% of epoxy resin, 5-15% of a diluent, 35-45% of a flame retardant, 10-15% of polyamine, 1-5% of color paste and 1-2% of a release agent. The high-temperature-resistant flame-retardant glass fiber reinforced plastic is good in impact resistance and high temperature resistance, has good mechanical performance and manufacturability, is low in curing shrinkage rate, meets UL 94V0 fireproof combustion performance and is high in glass transition temperature.

The application discloses a resin composition and application thereof, and the resin composition comprises, in terms of solid weight, 10-70 parts of a benzoxazine resin containing unsaturated bonds, and 20-100 parts of a maleimide resin; wherein the benzoxazine resin containing unsaturated bonds is a mixture of a benzoxazine resin containing double bonds and a benzoxazine resin containing triple bonds. Compared with the prior art, the resin composition and application thereof can not only control the reactivity between the maleimide resin and the benzoxazine resin, improve the crosslinking network density, but also is beneficial to controlling the production speed of prepreg, and the prepreg has good apparent quality, and meanwhile has excellent high heat resistance, high modulus, low water absorption, low thermal expansion coefficient and low curing shrinkage.

The invention discloses self-lubricating flame-retardant epoxy resin for pultrusion of basalt fibers as well as a preparation method and application of the self-lubricating flame-retardant epoxy resin, and relates to the technical field of high polymer materials. The self-lubricating flame-retardant epoxy resin is prepared from the following raw materials in parts by mass: 100 parts of a phenolic aldehyde modified epoxy resin solution, 0.5-2 parts of a silane coupling agent, 2-8 parts of modified graphite powder, 20-30 parts of modified nano aluminum hydroxide, 0.5-1.0 part of a plasticizer, 0.2-0.8 part of an accelerant and 10-15 parts of a diluent. The modified graphite powder and the modified nano aluminum hydroxide are used as inorganic inert fillers to synergistically modify the epoxy resin, so that the basalt fiber pultrusion sectional material has the characteristics of low friction coefficient, good flame retardance, high strength, good toughness and low shrinkage rate, is simple in preparation process and easy for industrial production, and has wide application prospects in the field of basalt fiber pultrusion sectional materials.

The invention discloses a low-warping-degree copper-clad plate and a preparation process thereof, and belongs to the technical field of copper-clad plates. The low-warping-degree copper-clad plate disclosed by the invention is prepared by the following steps: firstly, completely and uniformly infiltrating glass fiber cloth with a copper-clad plate glue solution, and then drying to obtain a prepreg; stacking a plurality of prepregs which are flat in surface and uniformly coated, attaching copper foils on the upper and lower parts, and performing hot pressing; the copper-clad plate glue solution is characterized by comprising the following raw material components in parts by weight: 80-100 parts by mass of epoxy resin, 44-55 parts by mass of a low-shrinkage curing agent, 1.6-2 parts by mass of an accelerant, 10-30 parts by mass of a flame retardant and 90-110 parts by mass of a solvent.

The present invention aims to obtain an active energy ray-curable composition, characterized in that the formed coating film has excellent heat resistance and a high refractive index. As a solution, the present invention provides an active energy ray-curable composition, characterized in that it contains the following (A) and (B), and substantially does not contain a solvent, (A) zirconium oxide fine particles; (B) polysiloxane obtained by acetal-protecting the silanol group of the hydrolysis condensate of alkoxysilane.

The present invention relates to the technical field of solid-state batteries, and in particular to an additive manufacturing method for all-solid-state batteries, comprising: forming positive electrode slurry, negative electrode slurry, electrolyte slurry and current collector slurry; forming each primary solid-state battery assembly; post-processing each primary solid-state battery assembly to form a finished solid-state battery; obtaining several quality test results of the finished solid-state battery; determining the additive manufacturing state according to the proportion of the number of unqualified products in the quality test; if the additive manufacturing state is unstable, adjusting the cutting distance or determining whether the slurry solidification state meets the requirements in combination with the surface inclination of the primary solid-state battery assembly; if the slurry solidification state does not meet the requirements, adjusting the printing speed of the additive device according to the surface inclination of the primary solid-state battery assembly or adjusting the rising rate of the stirring blade according to the maximum average flow distance of the slurry. The present invention achieves the improvement of additive manufacturing accuracy and slurry stability.

This application relates to the field of silicone rubber, and more specifically, to a high-performance weather-resistant and anti-fouling silicone rubber for encapsulation / bonding of electronic components and its preparation method. It comprises the following raw materials in weight percentages: 50-65% base compound; 20-30% insulating filler; 5-8% A synergist; 2-5% B synergist; the balance being processing aids; A synergist is a hydrogen-containing silicone resin; B synergist is composed of cage-type polysilsesquioxane containing activating groups, tetravinyltetramethylcyclotetrasilazane, and silicone wax in a weight ratio of 1:(0.5-1):(1-3); and the compound system of synergist and B synergist can bond with the silicone rubber obtained from the base compound and insulating filler to form a dense and stable three-dimensional cross-linked network after curing. This not only possesses superior physical properties but also excellent bonding strength, low shrinkage, weather resistance, and anti-fouling properties, improving the structural stability and long-term reliability of electronic components.

The invention relates to the technical field of curing adhesives, and discloses a UV curing adhesive for an FPC and a preparation method of the UV curing adhesive. Comprising the following operation steps: mixing aliphatic polyurethane acrylate, a reactive diluent and a defoaming agent, heating to 50-60 DEG C, stirring for 1-2 hours, adding modified polyurethane acrylate, a photoinitiator and an antioxidant, uniformly mixing, and filtering to obtain the UV curing adhesive. Aliphatic polyurethane acrylate is used as a base material; the flexible adhesive has good flexibility and curing speed, but is high in shrinkage rate; in the scheme, trimethylolpropane triacrylate and siloxane ethylene glycol epoxy acrylate are taken as reactive diluents, so that the curing shrinkage rate and the thermal stability are reduced; and modified polyurethane acrylate with Schiff base is introduced to synergistically further improve the thermal stability of the UV curing adhesive.

The application relates to the technical field of heat-curable crosslinking agents, in particular to vinylbenzyl fluorene containing a benzocyclobutene group and a preparation method and application thereof, wherein the preparation method of the vinylbenzyl fluorene containing the benzocyclobutene group comprises the following reaction steps: S1. adding fluorene, a solvent, a strong base and a phase transfer catalyst into a reaction container, adding 4-bromobenzocyclobutene dropwise into the reaction container under inert atmosphere, continuous stirring and constant temperature conditions, sequentially performing treatment of solvent removal under reduced pressure, extraction, washing, solvent removal under reduced pressure in the organic phase, and obtaining a target intermediate product; S2. adding the target intermediate product, 4-vinylbenzyl chloride, a solvent, a weak base and a phase transfer catalyst into a reaction container, performing reaction under inert atmosphere, continuous stirring and constant temperature conditions, sequentially performing treatment of solvent removal under reduced pressure, extraction, washing, solvent removal under reduced pressure in the organic phase and recrystallization, and obtaining the vinylbenzyl fluorene containing the benzocyclobutene group.

The present application relates to the technical field of adhesive, in particular to a high-toughness anti-fatigue acrylic structural adhesive as well as a preparation method and application thereof.The high-toughness anti-fatigue acrylic structural adhesive comprises independently packaged component A and component B;in terms of mass fraction, component A comprises: 40-60 parts of acrylic ester main monomer, 5-20 parts of acrylic ester auxiliary monomer, 3-10 parts of first epoxy resin, 8-30 parts of composite toughening agent, 0.5-5 parts of accelerator, 0.1-5 parts of functional auxiliary agent, and 0.01-0.1 parts of molecular weight regulator; the composite toughening agent comprises core-shell nano toughening agent and rubber-based toughening agent; component B comprises: 5-25 parts of second epoxy resin, 5-30 parts of crosslinking agent, 5-30 parts of initiator, 5-25 parts of auxiliary toughening agent, and 2-10 parts of inorganic filler.The high-toughness anti-fatigue acrylic structural adhesive has low-temperature mechanical properties, anti-fatigue properties and toughening properties.

The invention discloses an anti-oil-spitting UV transparent primer as well as a preparation process and a test method thereof, and relates to the technical field of paints.The anti-oil-spitting UV transparent primer comprises the following components in parts by mass: 20-50 parts of hyperbranched polyester acrylate, 5-20 parts of trifunctional polyurethane acrylate resin, 5-20 parts of special modified acrylate adhesive force resin, 0.5-1 part of a dispersing agent, 0.1-0.3 part of a defoaming agent and 0.1-0.3 part of fumed silica. The coating is prepared from the following components in parts by weight: 20-30 parts of acrylic acid, 0.1-0.2 part of bentonite, 0.2-0.3 part of bis (2, 4, 6-trimethylbenzoyl) phenylphosphine oxide, 3-4 parts of 2-hydroxy-2-methyl-1-phenyl-1-acetone, 1-2 parts of zinc stearate, 0.2-0.3 part of an acrylate flatting agent, 0.1-0.3 part of a liquid rheological agent and 5-15 parts of trimethylolpropane triacrylate. The UV transparent primer is specially used for natural pine base materials in the calibration tool market, the problems that common UV transparent primer in the current market is free of adhesion, a paint film is prone to blistering, scabs are prone to whitening and falling off, and the storage time is short are solved, and meanwhile the practical problems of tolerance, paint film physical performance and the like brought forward by a user to a product are solved.

The application provides a sealant and a preparation method thereof, and relates to the technical field of sealants. The sealant comprises A component and B component. The A component comprises the following raw materials: bio-based polyaspartic ester resin, modified nano zinc oxide, tea polyphenol microcapsule, filler, dispersant and defoaming agent. The B component comprises the following raw materials: bio-based isocyanate prepolymer, HDI trimer, catalyst and light stabilizer. The sealant provided by the application has the comprehensive performances of weather resistance, anti-yellowing, mechanical balance, environmental protection, safety, antibiosis and durability, and is suitable for the sealing of building gaps in the environment exposed to light and moisture for a long time.

The application provides a low-shrinkage anti-cracking water-soluble all-inorganic salt core bonding glue and a preparation method thereof, and belongs to the technical field of inorganic adhesives.The bonding glue is prepared by compounding a paste-like inorganic mortar with silica sol as a liquid-phase film-forming matrix, aluminum oxide powder as a skeleton reinforcing filler and boric acid as a flexible anti-cracking water-soluble modifier.The Si-O-B flexible crosslinking network is constructed in situ by the boric acid, and the industry problems of the traditional silica sol glue layer, such as great brittleness, easy cracking due to shrinkage during cooling, and poor cold and hot cycle stability of the pure inorganic glue, are solved;meanwhile, the all-inorganic reversible water-soluble characteristics of the system are retained, the cured glue layer can be completely powdered and removed by hot water immersion, and there is no stubborn glue layer residue.The formula of the application is simple, the construction can be carried out at room temperature, the curing shrinkage rate is extremely low, the room-temperature bonding strength is high, the cold and hot impact resistance is excellent, and the application is suitable for the room-temperature splicing of die-casting salt cores and cast water-soluble salt core components, salt core repair and repair, salt core forming positioning and fixing and the like.

The object of the present invention is to provide a curable composition having both excellent photocurability and excellent thermal curability, low viscosity, and small curing shrinkage. The solution of the present invention is a curable composition comprising the following components (1) to (4): (1) a compound having a (meth)acryloyl group, (2) a polythiol compound having two or more mercapto groups in one molecule, (3) a photoradical generator, and (4) a latent curing agent, wherein the above-mentioned component (1) comprises component (1-1): (1-1) a compound having a poly(oxyalkylene) chain and a (meth)acryloyl equivalent of 300 or more.

The invention discloses a concrete crack epoxy resin grouting repairing system and method based on the dialysis principle, and belongs to the technical field of concrete crack repairing. The concrete crack epoxy resin grouting repairing system comprises a grouting system, a slurry pumping system and a filtering system; the grouting system comprises a grouting pump, a grouting material storage tank and a grouting pipe; the slurry pumping system comprises a slurry pumping pump, an impurity collecting tank and a slurry pumping pipe; the inlet end and the outlet end of the filtering system are connected with the impurity collecting tank and the grouting material storage tank respectively, and the filtering system comprises a rough filtering unit, a fine filtering unit and an adsorption unit which are sequentially connected in series from the inlet end to the outlet end; the grouting system, the concrete crack, the slurry pumping system and the filtering system are connected through pipelines to form a circulating flow path. According to the method, impurities in the crack are synchronously taken out and filtered through the cyclic dialysis process of'filling-extracting-filtering-refilling ', integration of impurity removal and grouting reinforcement is achieved, the bonding strength of a grouting material and the concrete crack wall is greatly improved, the repairing quality is guaranteed, and the service life of a concrete structure is prolonged.

The present invention belongs to the technical field of ship propulsion system, and relates to a stern shaft sleeve structure of a ship propulsion system shaft system. The present invention also relates to a method for manufacturing a stern shaft sleeve structure of a ship propulsion system shaft system. A rear bearing seat (6) is arranged on the outer ring of a rear epoxy part (5), a front bearing seat (7) is arranged on the outer ring of a front epoxy part (9), an outer sleeve (8) is arranged between the rear bearing seat (6) and the front bearing seat (7), a cavity (16) is formed between the inner sleeve (4) and the outer sleeve (8), and circulating lubricating oil is injected into the cavity (16). The outer sleeve (8) includes a rear pre-installed section (10), a front pre-installed section (11), an embedded section (12), and two C-shaped sealing section assemblies (13). The stern shaft sleeve structure of a ship propulsion system shaft system described in the present invention can simplify the processing procedures, shorten the construction period, and avoid adverse effects and damage to the epoxy part, thereby improving the overall performance and service life.

The application discloses a transfer glue special for transfer high-gloss tipping paper and a preparation method thereof, and aims to solve the defects of poor environmental protection, insufficient water resistance, large curing shrinkage and the like of the existing transfer glue. The transfer glue is prepared from raw materials such as modified acrylate copolymer emulsion and epoxy modified polyurethane dispersion, wherein the modified acrylate copolymer emulsion is prepared through seed emulsion polymerization, and a composite emulsifier is prepared from an anion and a nonionic emulsifier. The preparation method comprises two steps of modified acrylate copolymer emulsion preparation and transfer glue finished product preparation. The transfer glue is environment-friendly and non-toxic, has high adhesive strength, low curing shrinkage and excellent flow leveling property, can realize complete transfer of an aluminized layer, and guarantees high-gloss texture of the tipping paper; and the preparation process is simple and controllable, and is suitable for industrial production.

The invention relates to the technical field of resistance reduction, and particularly discloses a high-precision bionic resistance reduction structure preparation process, a resistance reduction material and a resistance reduction structure. According to the method, polyurethane acrylate, fluorine-containing acrylate, epoxy acrylate and an active diluting monomer are used as main raw materials of a resistance reducing material, the resistance reducing material is injected into a placoid scale structure groove of a transparent flexible silica gel mold, a UV curing mode is adopted firstly, so that a resistance reducing structure is formed preliminarily, and then the resistance reducing material is formed; the drag reduction material can be directly and preliminarily cured on the surface of the ship; and then thermal curing treatment is carried out in the later period, the drag reduction material is fully crosslinked in the thermal curing treatment process, and the hardness, peel strength and wear resistance of the drag reduction material are improved. The technical blank of spraying a three-dimensional structure on the surface of a ship is filled, high pattern precision is ensured, the integrity of the three-dimensional pattern can still be ensured after long-term use, and the resistance reduction structure has a long-acting resistance reduction effect.

A compound for an optical element adhesive is represented by formula [1]. In formula [1], X1 represents a structure selected from formulae [1-a] to [1-g]. TA represents a hydrogen atom or a benzene ring, and * represents a bond. X2 represents a linear alkylene group having 2-14 carbon atoms, and the alkylene group may be substituted by at least one of (i) and (ii). (i) any-CH2-, which is not adjacent to X1 or X3, in the alkylene group is substituted by-O-,-CO-,-COO-,-OCO-,-CONH-,-NHCO-,-NH-, a benzene ring or a cyclohexane ring; (ii) Any-CH2-in the alkylene group is substituted by-CH (CH3)-. And X3 represents-CO <->,-COO <->,-OCO <->,-CONH <->,-NHCO <-> or-NH <->. And X4 represents a branched alkyl group having 12 to 40 carbon atoms.

This invention discloses a single-component photo- and thermally curable adhesive and its preparation method. The adhesive comprises the following components in parts by weight: 20–80 parts of a polymerizable acrylic compound; 1–10 parts of a macromolecular photoinitiator; 0.1–5 parts of a thermal initiator; 0.1–3 parts of a peroxide; 5–61 parts of filler; 0–5 parts of a light stabilizer; and 0.1–5 parts of additives. The macromolecular photoinitiator generates free radicals under ultraviolet light irradiation, achieving rapid curing of the irradiated area. The thermal initiator releases acid and promotes the decomposition of the peroxide under heating conditions, enabling the system to generate free radicals at a low temperature of 50–90 °C, thereby completing the curing of the light-shielded area. By introducing fillers and stabilizers into the system, the curing shrinkage rate can be reduced, and dimensional stability and long-term storage stability can be improved.

The invention relates to the technical field of coatings, in particular to a photo-thermal composite curing glass coating composition, a preparation method thereof and a coating. The invention discloses a photo-thermal composite curing glass coating composition which comprises epoxy resin, an epoxy flexibilizer, an acrylate monomer, a diluent, an acrylate cross-linking agent, a cationic photoinitiator, a free radical photoinitiator, a coupling agent, a sensitizer and other additives. The photo-thermal composite curing composition simultaneously contains a cationic system and a free radical system, free radical polymerization and cationic polymerization can be carried out, an interpenetrating network is formed in the curing process, and the photo-thermal composite curing composition has excellent adhesive force, flexibility, water soaking resistance, strong wine soaking resistance and boiling resistance when being used as a glass coating.

The present application relates to a kind of laminated optical films, it is sequentially laminated with the 1st optical film, the 1st adhesive layer, the 2nd optical film, the 2nd adhesive layer and the 3rd optical film, wherein, the 1st adhesive layer and the 2nd adhesive layer are the cured product layer of laminated optical film adhesive composition containing curable component and metal oxide particles.It is preferable that the refractive index of the 1st adhesive layer and the 2nd adhesive layer is 1.55 or more.It is preferable that the refractive index of the 1st optical film and the 2nd optical film is 1.55 or more.It is preferable that the 1st optical film and the 2nd optical film are both phase difference films of liquid crystal type, and it is preferable that the 3rd optical film is at least a polarizing film with polarizer.

The invention discloses a 3D printing rapid prototyping method based on a photocuring three-dimensional prototyping technology, and relates to the technical field of 3D printing. Photosensitive resin composed of a resin matrix, a photoinitiator and a filler is used as a core material for photocuring 3D printing; performing three-dimensional model design on the printing sample; checking and repairing the model file in the stereolithography format, and judging whether the printing sample model has an error problem or not; printing parameters are set in the slicing software, and a detachable supporting structure is designed through a seed filling algorithm and used for supporting a suspended or inclined part; the light source system irradiates the photosensitive resin in the resin tank layer by layer based on a printing sample model preset instruction; the detachable supporting structure is removed; and carrying out surface grinding, polishing, spraying and curing treatment on the to-be-treated 3D model. A detachable supporting structure is designed through a seed filling algorithm, and the stability and integrity of the model in the printing process are ensured.

This invention relates to the field of epoxy adhesive technology, and discloses an epoxy adhesive for semiconductor chip packaging and its preparation process; including the following steps: Step 1: Epoxy resin and 3-(perfluorohexyl)epoxypropane are added to ethanol and mixed evenly, then 2-imidazolium-1-ethylamine is added, and the mixture is reacted at 50~60℃ for 4~6 hours to obtain modified epoxy resin; Step 2: Modified epoxy resin, modified polyurethane, defoamer, and diluent are vacuumed and stirred at 800~1200 rpm / min for 40~50 minutes, then nano zinc oxide and curing agent are added sequentially, and the stirring speed is reduced to 200~400 rpm / min for 1~2 hours to obtain epoxy adhesive.