47 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 provides a methacrylate-terminated polyurethane prepolymer, a preparation method and two-component dual-curing photosensitive resin, and relates to the technical field of 3D printing new materials. The structure of the methacrylate-terminated polyurethane prepolymer is shown as a formula IV, and the invention also provides a two-component dual-curing photosensitive resin which comprises the methacrylate-terminated polyurethane prepolymer shown as the formula IV, the bi-component dual-curing photosensitive resin is prepared by the following steps: firstly, fully mixing a methacrylate-terminated polyurethane prepolymer as shown in a formula IV, a reactive diluent and a photoinitiator as a component A and diamine as a component B at room temperature to form the bi-component dual-curing photosensitive resin. According to the invention, the methacrylate-terminated polyurethane prepolymer generates a mismatched supramolecular effect through the molecular structure design of'rigid main chain-flexible side chain ', so that the strength and toughness of the material are synergistically improved, and a 3D printed product shows ultrahigh mechanical properties.

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 invention discloses a photo-thermal dual-curing resin composition as well as a preparation method and application thereof. The photo-thermal dual-curing resin composition is prepared from the following raw material components in percentage by mass: 40 to 70 percent of blocked polyurethane oligomer, 30 to 50 percent of reactive diluent, 2 to 15 percent of diamine chain extender with multiple hydrogen bonds and 0.5 to 3 percent of photoinitiator. The photo-thermal dual-curing resin composition provided by the invention is low in viscosity and good in stability, and can meet the printing requirements of a photo-curing 3D printer at normal temperature, and a printed product has the characteristics of high strength and high toughness.

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.

Provided is a method of additively manufacturing an object having a particle surface coating thereon, using an intermediate object produced in an additive manufacturing process by light polymerization of a dual cure resin, the intermediate object having residual dual cure resin from which it was produced remaining on a surface portion thereof in unpolymerized form; forming a solid particle coating adhered to the resin coating film; and then further curing the intermediate object.

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.

The present invention relates to an inkjet composition having 1.0-5.0 mol / kg acryloyl groups comprising:i) photo polymerization reactive compound (M) containing exactly one acryloyl group,ii) photo polymerization reactive compound (N) containing at least two acryloyl groups,iii) radical photoinitiator (R),iv) cyanate ester compound (D) containing at least two cyanate groups andv) cyanate ester curing catalyst (C), wherein(M) is different from (D) and (N) is different from (D),25-50 mol % of the contained acryloyl groups are provided by the reactive compound (N) and the molar ratio of contained acryloyl groups to contained cyanate groups of compound (D) is 0.30 to 0.95.

The invention relates to the technical field of hydrogel, in particular to a dual-curing hydrogel precursor solution, 3D printing hydrogel and application thereof. The dual-cured hydrogel precursor solution is prepared from the following raw materials in parts by weight: 0 to 2 parts of acrylic resin, 8 to 10 parts of acrylic monomer, 0.02 to 0.05 part of thermal initiator, 0.14 to 0.15 part of water-soluble photoinitiator and 1 to 1.2 parts of solvent; wherein the acrylic acid monomer comprises N-acryloyl glycine amide and N-acryloyl semicarbazide; the solvent comprises a phosphate buffer solution. The hydrogel prepared from the hydrogel precursor solution provided by the invention has excellent tensile strength and micro-nano processing precision.

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.

Apparatus for, and associated method of, making a three-dimensional object from a light polymerizable resin by inkjet additive manufacturing are described. The methods and apparatus employ dual precursor resins, including but not limited to dual cure resins having a first component photopolymerizable and a second component polymerizable by a mechanism different from the first component.

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 invention provides a low-temperature fast-curing water-based paint and a preparation method thereof, and relates to the technical field of paints.The low-temperature fast-curing water-based paint comprises modified epoxy emulsion, a dual curing agent and auxiliaries, the dual curing agent comprises a microcapsule accelerant and an ionic liquid modifier, the preparation method of the low-temperature fast-curing water-based paint comprises the following steps: respectively preparing the modified epoxy emulsion and the dual curing agent, dispersing the modified epoxy emulsion and the dual curing agent with the auxiliaries at a high speed, and defoaming and filtering the modified epoxy emulsion and the dual curing agent. The paint has the advantages of low-temperature quick curing property, high adhesive force and excellent wear resistance, and is suitable for quick coating of metal and plastic substrates.

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.

Provided is method of making a three-dimensional object comprising polyurea, which may include: (a) dispensing a one part (1K) dual cure resin into a stereolithography apparatus, the resin comprising or consisting essentially of a photoinitiator, a reactive blocked polyisocyanate, optionally a catalyst such as a polyurethane blowing catalyst, and optionally a polyepoxide; (b) additively manufacturing from said resin an intermediate object comprising the light polymerization product of said reactive blocked polyisocyanate; (c) optionally cleaning said intermediate object; and (d) reacting said polymerization product in said intermediate with water in the presence of a catalyst such as a polyurethane blowing catalyst (which may be included in the resin, the water, or both) to generate polyamine in situ that sequentially reacts with the remainder of the polymerization product to form urea linkages and thereby produce a three-dimensional object comprising polyurea. Dual cure resins useful for the method are also provided.

The invention provides a dual-curing anti-sliding coating as well as a preparation method and a use method of the dual-curing anti-sliding coating, and belongs to the technical field of anticorrosive coatings. The coating comprises the following components in percentage by weight: 2%-5% of a phosphate acrylate monomer, 3%-5% of metal-based modified bentonite, 0.05%-0.2% of an emulsifier, 1.5%-3% of an alkali metal oxide solution, 10%-14% of a bisphenol A epoxy acrylate emulsion, 0.5%-1.2% of a coalescing agent, 52%-58% of zinc powder, 6%-8% of filler, 0.05%-0.5% of a drier and the balance of water. According to the invention, an inorganic / organic interpenetrating polymer network is formed by combining drying and curing of the inorganic silicate at normal temperature and curing of the organic vinyl oligomer through catalytic oxidation, so that the coating has excellent adhesive force, corrosion resistance and anti-sliding ability by virtue of a dual-curing mechanism, the obtained coating has low VOC content, and the environmental protection performance is improved.

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

The present invention provides a methacrylate-terminated polyurethane prepolymer, a preparation method thereof, and a two-component dual-curing photosensitive resin, relating to the technical field of new materials for 3D printing. The structure of the methacrylate-terminated polyurethane prepolymer is shown in Formula IV. The present invention also provides a two-component dual-curing photosensitive resin, which includes the methacrylate-terminated polyurethane prepolymer shown in Formula IV. The two-component dual-curing photosensitive resin is prepared by using the methacrylate-terminated polyurethane prepolymer shown in Formula IV, an active diluent, and a photoinitiator as Component A, and diamine as Component B. The two components are fully mixed at room temperature to form the two-component dual-curing photosensitive resin. In the present invention, through the molecular structure design of "rigid main chain - flexible side chain" for the methacrylate-terminated polyurethane prepolymer, a mismatched supramolecular interaction is generated, thereby realizing the synergistic improvement of the strength and toughness of the material, and enabling the 3D printed product to exhibit ultra-high mechanical properties.