34 results about "Dual cure" patented technology

The invention relates to the technical field of polyurethane acrylate, and particularly discloses dual-curing polyurethane acrylate resin and a preparation method thereof. Wherein the dual-curing polyurethane acrylate resin is prepared from the following raw materials: polyester polyol, polyether polyol, diisocyanate, hydroxyl acrylate, a chain extender, a photoinitiator, cardanol glycidyl ether, a polymerization inhibitor and modified nanoparticles. Wherein the citric acid and the polyethyleneimine are adopted to carry out synergistic modification on the nano particles, the dispersion stability of the nano particles is improved, so that the mechanical property of the resin is improved, the cardanol glycidyl ether and the photoinitiator generate a synergistic effect, and the resin can be quickly shaped through photocuring promoted by the photoinitiator; the cardanol glycidyl ether participates in the subsequent thermocuring reaction, so that the curing effect is improved, and the adhesive force between the film layer and the base material is enhanced.

The invention relates to the technical field of adhesive tapes, in particular to a convex ball-mounting wafer thinning adhesive tape, a preparation method thereof and a wafer thinning machine, the thinning adhesive tape comprises a base material film, a viscosity-reducing adhesive layer and a release film; the preparation method comprises the following steps: preparing a first polymer network; preparing a second polymer network; the adhesive composition is obtained; forming a liquid film; covering the base material film on a liquid film; covering a release film on the upper surface of the fixed module in the wafer thinning machine; in a wafer thinning machine, the wafer with the base material film is installed on a release film, and heating treatment is carried out on the laminated wafer so as to directly form a solidified thinning adhesive tape on the wafer; by constructing a thermal / optical dual-curing interpenetrating polymer network with a dual visbreaking mechanism and combining with a special preparation method of the thinning adhesive tape in a thinning machine, the probability that a convex ball-mounting wafer generates microcracks or warps in a specific area when the adhesive tape is used for thinning operation is reduced.

The invention relates to a normal-temperature curing high-corrosion-resistance self-lubricating composite coating which is prepared from the following components in parts by weight: 25 to 35 parts of modified epoxy resin, 12 to 22 parts of waterborne polyurethane-acrylate copolymer, 6 to 14 parts of lubricating filler, 4 to 9 parts of corrosion-resistant filler, 10 to 18 parts of composite curing agent, 1 to 4 parts of dispersing agent, 0.5 to 3.5 parts of flatting agent, 0.8 to 2.5 parts of defoaming agent and 35 to 55 parts of auxiliary solvent. According to the coating disclosed by the invention, an interpenetrating network matrix is constructed through modified epoxy resin and a waterborne polyurethane-acrylate copolymer, and is matched with components such as a nano molybdenum disulfide / graphene composite lubricating filler and a nano titanium dioxide-zinc oxide composite corrosion-resistant filler, and a photoinitiator-amine composite curing agent is combined, so that dual curing is realized. The coating has excellent properties of rapid curing at normal temperature, high corrosion resistance, self-lubrication and the like, is low in VOC content and wide in application range, and provides an innovative solution for the field of surface protection.

The present disclosure describes a method of making a composite product (20) by additive manufacturing. The method includes providing an additive manufacturing apparatus having a build platform, the build platform having a planar face on which the product is formed; securing a fabric (22) sheet to the planar face (11) to provide a planar fabric surface thereon; additively manufacturing an intermediate object on the planar fabric surface in the apparatus (12) by light polymerizing a dual cure resin to produce an intermediate object on the build platform, the intermediate object including the fabric (22) sheet having the three-dimensional object (21) adhered thereto; and concurrently with or following the additively manufacturing step, further curing the intermediate object to produce a composite object including the fabric sheet having the three-dimensional object adhered thereto. Composite object and products are also described herein.

The invention relates to the field of printing ink, and particularly discloses high-weather-resistance dual-curing UV printing ink and a preparation method thereof. Comprising the following raw materials in parts by mass: 15 to 20 parts of aliphatic polyurethane acrylate, 10 to 20 parts of polybutadiene diacrylate oligomer, 10 to 20 parts of polyurethane and 10 to 15 parts of epoxy acrylate. 20 to 25 parts of a reactive diluent; 7-10 parts of an initiator, 8-12 parts of an auxiliary agent and 1-20 parts of a pigment; the initiator comprises a free radical initiator and a cationic initiator, the free radical initiator comprises one or more of TPO and 819, and the cationic initiator comprises one or more of 261 and 250; the reactive diluent is prepared from one or more of dipropylene glycol diacrylate and propylene oxide glycerol triacrylate. The high-weather-resistant dual-curing UV printing ink is fully cured and has good low-temperature and weather-resistant performance.

To provide a curable composition that can be cured by two types of external stimuli, that is, can undergo dual curing.SOLUTION: A curable composition contains (A) an organic polymer having a (meth)acryloyl group, (B) a compound X represented by a specific formula, and (C) a radical polymerization initiator, where, relative to 100 pts.wt. of (A), a content of (B) is 0.01 pt.wt. to 100.00 pts.wt., and a content of (C) is 0.001 pt.wt. to 20.000 pts.wt.SELECTED DRAWING: None

The invention relates to dual curable oligomers comprising a segment a) comprising at least one ethylenic unsaturation, a segment b) comprising at least one epoxy group and a segment c) comprising at least one urethane bond, the segments a) and b) being connected to each other by means of the segment c). The invention also relates to curable compositions comprising such dual curable oligomers and their use as adhesives, inks, printing masks, coloring systems, 3D printing resins, sealants, coatings and other potential applications.

The application belongs to the technical field of solder resist ink resins, and particularly relates to an alkali-soluble photo / thermal dual-curing aliphatic polyester acrylate resin as well as a preparation method and application thereof. The application discloses an aliphatic polyester acrylate resin as shown in formula I. The preparation method of the aliphatic polyester acrylate resin is as follows: first, an intermediate product with an epoxy group at the end is prepared by reacting an aliphatic diepoxy compound with an aliphatic diacid; then, the obtained intermediate product is reacted with acrylic acid to obtain an intermediate product with an acrylate group at the end; finally, the obtained intermediate product is reacted with an aliphatic cyclic diacid anhydride to obtain a target product. The aliphatic polyester acrylate resin prepared by the method has excellent photo / thermal curing performance and alkali etching developing property, and since the resin does not contain an aromatic structure, the application of the resin in the preparation of solder resist ink can overcome the defect of poor yellowing resistance, so that the aliphatic polyester acrylate resin has a good application prospect in the field of low-yellowing solder resist ink.

A composition comprising: a) an ethylenically unsaturated monomer constituent comprising: a1) at least one (meth)acrylate-functionalized macromonomer having a weight average molecular weight (Mw) of from 1000 to 100000 daltons; and, a2) at least one monomer having at least two ethylenically unsaturated groups and having a weight average molecular weight (Mw) of at most 600 Daltons; and, b) at least one ester peroxide in accordance with Formula P1, wherein: Rp is C1-C12 alkyl, C6-C18 aryl, C7-C18 aralkyl or C7-C18 alkaryl.

This invention provides a single-component, dual-curing 3D printing photosensitive resin, elastomer material, and preparation method incorporating a "latent" reaction source, relating to the field of 3D printing technology. The photosensitive resin, by weight, comprises the following raw materials: 70-90 parts of methacrylate-terminated polyurethane prepolymer, 1-5 parts of a dehydrating compound under heating conditions, 5-15 parts of an reactive diluent, and 1-5 parts of a photoinitiator. The structural formula of the methacrylate-terminated polyurethane prepolymer is shown in Formula II. The photosensitive resin of this invention introduces a dehydrating substance that can be heated to a specific temperature as a "latent" reaction source. In the post-printing processing stage, dehydration is triggered by heating, and the released water molecules react with some isocyanate groups in the system, generating a highly active diamine chain extender in situ, which then undergoes a highly efficient chain extension reaction with the remaining isocyanate.

According to the flexible material processing method based on the removable filler, the phase change salt serves as a strengthening component, strengthening supporting during flexible material processing and efficient and convenient removal after processing are achieved by controlling the phase state of the phase change salt, the problem that a honeycomb material is prone to deformation during processing can be effectively solved, and the processing quality of the honeycomb material is improved. And operation is simple, cost is low, and removal is easy. Furthermore, a controllable initiation curing system is added into the filling solution at the same time, the supporting strength of the filler is greatly improved through a dual curing and strengthening synergistic mechanism, the process is simple and convenient, removal is efficient, environmental protection is achieved, and the problem that the flexible material is prone to deformation in the machining process is effectively solved.

A dual cure process for forming a solid polymeric structure is provided. An end-capped terminal imide prepolymer is combined with at least one photopolymerizable ethylenic monomer, at least one photoinitiator, and a diamine to form a curable resin composition. The resin composition is irradiated in a first step under conditions effective to polymerize the at least one ethylenic monomer, thereby forming a scaffold composed of the prepolymer and polyolefin, wherein the diamine is entrapped within the scaffold. The irradiated composition is then heat treated at a temperature effective to cause a transimidization reaction between the prepolymer and the diamine, thereby releasing the terminal groups of the prepolymer to provide the solid polymeric structure. Also provided is a curable resin composition comprising an end-capped terminal imide prepolymer, at least one photopolymerizable ethylenic monomer, at least one photoinitiator, and a diamine, and related methods of use.

The embodiment of the invention provides printing ink for gravure embossing of a veneer as well as a preparation method and application of the printing ink, and belongs to the technical field of printing ink. The printing ink is prepared from the following components in parts by weight: 20 to 30 parts of a solvent, 4 to 6 parts of a monomer, 3 to 6 parts of a photoinitiator, 0.1 to 0.2 part of an oxygen polymerization inhibitor, 35 to 55 parts of special modified dual-cured alicyclic polyurethane acrylate, 15 to 25 parts of fluorosilicone modified aliphatic polyurethane acrylate, 8 to 16 parts of nano-hybrid modified high-functionality acrylate, 0.3 to 1 part of a defoaming agent and 6 to 10 parts of filler; the second component is 5-10 parts of a curing agent; the first component and the second component are mixed before coating, and after coating, the ink coating is formed through secondary curing. The printing ink provided by the invention has embossing flexibility and plasticity and wear resistance and stain resistance after curing.

Disclosed herein are a two-component polyurethane adhesive and a dual cure polyurethane-based adhesive for use in laminated films. The adhesives are particularly useful for producing photochromic and clear-to-polarized laminates for ophthalmic lens applications.

The disclosure provides a dual-cured photosensitive resin, a preparation method and an application thereof, and belongs to the technical field of polymer materials. Raw materials of the dual-cured photosensitive resin according to the disclosure include a polyurethane acrylate prepolymer bearing hindered urea bonds, a blocked diamine chain extender, a reactive diluent and a photoinitiator; and the blocked diamine chain extender is obtained by reacting a diamine chain extender with one of di-tert-butyl dicarbonate, acid and inorganic salt.

The present application relates to a photonic crystal composition based on a double curing system, a film and a preparation method thereof, raw materials of the photonic crystal composition comprising the following components by mass fraction: nanomicrospheres 50-80 parts; acrylate reactants 10-30 parts; photoinitiators 0.5-1.5 parts; thermally cured amino resins 1-10 parts; the photonic crystal composition has good adhesion on a plastic substrate and has high solvent resistance.

Compositions that are curable by free radical redox reactions are disclosed. Free radical curing reactions between polythiols and polyalkyenyls are initiated by the reaction of metal complexes and organic peroxides. The compositions are useful as sealants.

A coating has dual curing mechanisms wherein the first cure reaction and second cure reaction become active due to differing reaction mechanisms.

The invention relates to the technical field of printed circuit board manufacturing materials, in particular to black ink-jet ink and a preparation method and application thereof. The black ink-jet ink is prepared from the following components in parts by weight: 5 to 20 parts of modified epoxy acrylic resin, 5 to 15 parts of blocked isocyanate, 5 to 15 parts of hydroxyl-containing monomer, 5 to 10 parts of amide monomer, 30 to 60 parts of active diluting monomer, 5 to 10 parts of photo-initiation component, 5 to 10 parts of black nano color paste and 0.5 to 2 parts of auxiliary agent. A highly cross-linked compact network is formed through photo-thermal dual curing, and the problems that curing is slow, anti-sticking is prone to occurring, oil appears on the surface, adhesive force is poor, high temperature resistance is poor and stability is insufficient are solved.

The utility model discloses a transfer printing label which comprises a transfer printing label body, a printing device and a printer, the transfer printing label body comprises a printing ink pattern and a release film, the printing ink pattern is sprayed on the top of the release film, and the back face of the printer is provided with a pressing and holding mechanism for stably pressing and feeding materials. The outer end of the printer is further provided with a heating mechanism for rapid curing. The pressing mechanism comprises a pushing assembly and a pulling assembly. According to the utility model, through the matching arrangement of the ink pattern and the release film, the anti-counterfeiting effect is good, the carrier can be pressed and conveyed in the printing process by utilizing the pressing and holding mechanism so as to ensure the conveying stability and stable-pressure conveying of the carrier, and the carrier can be quickly cured by utilizing the matching of the heating mechanism, so that the anti-counterfeiting effect is good. After printing, thermocuring and irradiation curing can be carried out on the label body, and the required curing efficiency and curing effect are improved by adopting a top and bottom dual-curing mode.

Provided is a composition comprising: A) an aliphatic polyurethane which comprises a reaction product of a first aliphatic polyisocyanate, a first polyol, and a thiol, optionally in the presence of a catalyst, and B) a urethane (meth)acrylate prepolymer, optionally a reactive diluent, and a photoinitiator, wherein the urethane (meth)acrylate prepolymer comprises a reaction product of a second aliphatic polyisocyanate, a second polyol and an acrylate, wherein the reactive diluent comprises a (meth)acrylate monomer, wherein the first aliphatic polyisocyanate and second aliphatic polyisocyanate may be identical or different, and wherein the first polyol and the second polyol may be identical or different. Also provided is a process comprising combining: A) a polyurethane which comprises a reaction product of a first aliphatic polyisocyanate, a first polyol, and a thiol, optionally in the presence of a catalyst, and B) a urethane (meth)acrylate prepolymer, a reactive diluent, and a photoinitiator, wherein the urethane (meth)acrylate prepolymer comprises a reaction product of a second aliphatic polyisocyanate, a second polyol and an acrylate, wherein the reactive diluent comprises a (meth)acrylate monomer, wherein the first aliphatic polyisocyanate and second aliphatic polyisocyanate may be identical or different, and wherein the first polyol and the second polyol may be identical or different. The compositions of the invention may find use in 3D printing applications.

This invention discloses a dual-curing 3D printing resin, comprising an acrylate oligomer containing dynamic covalent bonds and a blocked isocyanate crosslinking agent. The acrylate oligomer containing dynamic covalent bonds is obtained by reacting an isocyanate-terminated oligomer with ethylene glycol acetoacetate methacrylate. The dual-curing 3D printing resin provided by this invention can have its internal molecular structure and crosslinking density altered through heat treatment after photocuring, and exhibits excellent stability, allowing for storage and use in single-component form.

The application provides a low-temperature curing high-refractive-index ink as well as a preparation method and application thereof. The ink comprises an epoxy monomer, an amine compound, a high-refractive-index dispersion liquid and a solvent, can be cured at low temperature, has a suitable viscosity in the case of high refractive index, and can be controlled to a film thickness of 5 mu m relatively easily. In particular, the ink added with a polyester acrylate oligomer and a photoinitiator is double-cured to form a film, the film material is lighter and thinner, can be designed in a pattern according to the requirements of panel design, is an excellent ink for display devices, and has a wide application prospect in OLED, Mini LED, Micro LED, LCD and other displays.

Embodiments of the present application provide a printing ink for veneer intaglio embossing, a preparation method and applications thereof, and belong to the technical field of printing ink. The printing ink comprises, by weight parts, in the first component, solvent: 20-30 parts, monomer: 4-6 parts, photoinitiator: 3-6 parts, oxygen polymerization inhibitor: 0.1-0.2 parts, special modified dual-curing aliphatic polyurethane acrylate: 35-55 parts, fluorosilicon modified aliphatic polyurethane acrylate: 15-25 parts, nano-hybrid modified high-functionality acrylate: 8-16 parts, defoamer: 0.3-1 part, filler: 6-10 parts; the second component is a curing agent: 5-10 parts; the first component is mixed with the second component before coating, and the ink coating is formed after secondary curing after coating. The printing ink has the properties of embossing flexibility and plasticity and wear resistance and stain resistance after curing.

The present invention relates to an electronic component impregnating composition comprising at least one polymerizable ethylenically unsaturated monomer, an initiator system comprising at least one photolabile initiator and at least one thermolabile initiator and a reactive thiol as well as the use and the application thereof. The composition comprises an at least trifunctional (meth)acrylate, a poly(oxyalkylene glycol) di(meth)acrylate and a linear or branched diurethane di(meth)acrylate. The thermolabile initiator has a 10-hour half life temperature of ≤ 50 °C.

The invention discloses a high-toughness photo-thermal dual-curing anisotropic conductive film and a preparation method thereof, and relates to the technical field of conductive films. When the high-toughness photo-thermal dual-curing anisotropic conductive film is prepared, isophorone diisocyanate reacts with hydroxyl-terminated unsaturated polyether to generate a polyurethane prepolymer, and then the polyurethane prepolymer reacts with ethylenediamine to prepare modified polyurethane; the silver powder and vinyltriethoxysilane are subjected to a reaction, and modified silver powder is obtained; the preparation method comprises the following steps: enabling 3-(2, 3-epoxypropoxy) propyl trimethoxy silane and diphenyl silanediol to react to prepare organic silicon resin; mixing bisphenol A epoxy acrylic resin, modified polyurethane, organic silicon resin and modified silver powder to prepare conductive adhesive slurry; and coating a PET substrate with the conductive adhesive slurry, and curing to obtain the high-toughness photo-thermal dual-curing anisotropic conductive film. The prepared high-toughness photo-thermal dual-curing anisotropic conductive film has good conductive, self-repairing and mechanical properties.

The application relates to the technical field of polyurethane acrylate, and particularly discloses a double-curing polyurethane acrylate resin and a preparation method thereof. The raw materials for preparing the double-curing polyurethane acrylate resin include polyester polyol, polyether polyol, diisocyanate, hydroxy acrylate, chain extender, photoinitiator, cashew phenol glycidyl ether, polymerization inhibitor and modified nanoparticles. The nanoparticles are modified by citric acid and polyethylene imine in cooperation, the dispersion stability of the nanoparticles is improved, the mechanical properties of the resin are improved, the cashew phenol glycidyl ether and the photoinitiator produce a synergistic effect, the light curing promoted by the photoinitiator can make the resin quickly shape first, and the cashew phenol glycidyl ether participates in the subsequent heat curing reaction, the curing effect is improved, and the adhesion between the film layer and the base material is enhanced.

[Problem] It is an object of the present invention to provide a dual-cure organopolysiloxane composition that is capable of both photocuring and curing by exposure to moisture, that exhibits excellent curability and long-term storage stability at room temperature or ambient storage conditions, and that is preferably applied in a solventless form. [Solution] A dual-cure organopolysiloxane composition, (A) an organopolysiloxane having an average of one or more alkenyl groups per molecule and an average of one or more hydrolyzable groups per molecule; (B) an organopolysiloxane having an average of two or more photoreactive groups per molecule; (C) a condensation reaction catalyst; (D) The following photoinitiators (d1) to (d3): (d1) 2,4,6-trimethylbenzoylphenylphosphinate, (d2) bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide, and (d3) 2,2-dimethoxy-1,2-diphenylethan-1-one, (E) a silane having an average of two or more hydrolyzable groups per molecule, and optionally (F) a radical scavenger; A dual cure organopolysiloxane composition comprising: