76 results about "Dual cure" patented technology

The invention discloses a dual-curing 3D printing resin, the dual-curing 3D printing resin comprises an acrylate oligomer containing a dynamic covalent bond and a blocked isocyanate cross-linking agent, and the acrylate oligomer containing the dynamic covalent bond is obtained by reacting an isocyanate-terminated oligomer with acetoacetic acid ethylene glycol methacrylate. The internal molecular structure and the crosslinking density of the dual-curing 3D printing resin can be changed through heat treatment after light curing, and the dual-curing 3D printing resin has excellent stability and can be stored and used in a single-component mode.

An adhesive composition is shown and described herein. The composition comprises a silylated polyurethane, an epoxy functional compound, and an amine functional compound. The compositions are provided to control the molar ratio of amine active hydrogen (AH) to epoxy (E) groups. By controlling the amine active hydrogen to epoxy molar ratio, an adhesive with excellent adhesion and strength on a variety of types of substrates is provided.

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.

Provided are dual cure resin compositions useful for additive manufacturing that include an elastomer-producing light polymerizable monomer and / or prepolymer; a monomer and / or prepolymer that is solidified by exposure to heat, microwave irradiation, and / or moisture; a photoinitiator; optionally, one or more additional light polymerizable monomers and / or prepolymers; and optionally, a thiol crosslinker. Methods of forming a polymer and / or three-dimensional object with the resin, and polymers and / or three-dimensional objects produced are also described.

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 provides a dual-curable polyoxazolidinone prepolymer and a resin composition for 3D printing, and particularly relates to the technical field of 3D printing materials. The dual-curable polyoxazolidinone prepolymer is prepared by the following steps: carrying out first reaction on dihydric alcohol and diisocyanate to generate an isocyanate-terminated polyurethane prepolymer; carrying out second reaction on the polyoxazolidinone and epoxy resin to generate polyoxazolidinone with isocyanate at two ends; and finally, carrying out third reaction on the polyoxazolidinone and a sealing agent to obtain the dual-cured polyoxazolidinone prepolymer. And the sealing agent is an aminomethacrylate compound. The polyoxazolidinone prepolymer provided by the invention provides excellent toughness through a polyurethane part synthesized by dihydric alcohol, and photo-thermal dual curing is realized through metacrylic acid ester end capping. The dual-curing mode not only improves the crosslinking density and uniformity, but also significantly enhances the mechanical properties, including strength, toughness and durability, of the material, so that the material can be efficiently cured under illumination or heating conditions to form a uniform three-dimensional network structure.

This disclosure relates to polysiloxanes and polysiloxane compositions having dual-curable properties, to methods for forming articles from such compositions, and to articles formed thereby. In one embodiment, the polysiloxane comprises at least about two alkenyl groups and at least about two (meth)acryloyl groups.

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.

An adhesive composition is shown and described herein. The composition comprises a silylated polyurethane, an epoxy functional compound, and an amine functional compound. The compositions are provided to control the molar ratio of amine active hydrogen (AH) to epoxy (E) groups. By controlling the amine active hydrogen to epoxy molar ratio, an adhesive with excellent adhesion and strength on a variety of types of substrates is provided.

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 present invention discloses a preparation method and a curing method of deep curing and photochromic ink. The preparation method specifically comprises the following steps: step 1, modifying nano calcium carbonate; step 2, preparing spiropyrile nano material according to the product obtained in step 1; step 3, modifying carbon black; step 4, preparing photochromic ink according to the products obtained in step 2 and step 3. The present invention also discloses a curing method of deep curing and photochromic ink, which enables the ink to be dual cured by light and hydroxyl induction, thereby improving the curing depth of the ink; at the same time, it can also rearrange and aggregate the photochromic molecules on the surface of the ink, so that the ink can achieve photochromic change.

The invention discloses a blocked isocyanate prepolymer, a preheat-treated dual-curing 3D printing resin and a molding method. The 3D printing resin comprises, by total weight 100%, 25-74% of a photocurable resin monomer and / or prepolymer, 0.5-6% of a photoinitiator, 21-72% of a blocked isocyanate prepolymer, 3-23% of a chain extender, and 0.02-1.8% of an auxiliary agent; the blocked isocyanate prepolymer has a structural formula as shown in Formula I, and by introducing a fluorine-containing group, hydrogen bonds and intermolecular forces can be greatly enhanced through nucleophilic action, and after being applied to the preheat-treated dual-curing 3D printing resin molding, the long-term stability of mechanical properties can be ensured and the deformation amount can be reduced.

Provided herein is a resin composition useful for the production of a three-dimensional object by additive manufacturing, said resin composition including one or more of: (a) a reactive blocked prepolymer including at least one ether subunit; (b) a multifunctional amine chain extender including at least one amide subunit; (c) a photoinitiator; and (d) optionally, a reactive and / or non-reactive diluent. Methods of forming a three-dimensional object with the resin composition and three-dimensional objects formed from the resin composition are also provided.

A curable composition contains: (a) a first organopolysiloxane comprising at least two trialkoxy silyl groups per molecule and that is free of alkenyl groups and mercapto groups; (b) a second organopolysiloxane containing at least one alkenyl group and that is free of mercapto groups and alkoxysilyl groups; (c) a third organopolysiloxane comprising on average 2 or more mercapto groups per molecule and that is free of alkenyl functionality and alkoxysilyl functionality; (d) a photoinitiator; (c) a condensation catalyst; and (f) optionally, alkoxy silane.

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.

A method of coating an article includes preparing a coating composition with an epoxy component; an amine component; and a catalyst; the epoxy component and the amine component being present in the coating composition at the ratio of 0.8:1 to 1.5:1; applying the coating composition onto the article; and within 60 minutes of the applying, curing the coating composition at a temperature of 135 degrees C to 250 degrees C to form a cured coating having a gloss rating of 60 Gloss Units (GU) or higher. Coating compositions and coated articles are also provided.

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.

The present application provides a method for preparing solder mask for a circuit board based on plugging hole treatment and a circuit board. The above-mentioned method for preparing solder mask for a circuit board based on plugging hole treatment, the present application provides a method for preparing solder mask for a circuit board based on plugging hole treatment, comprising the following steps: providing a board body, plugging the via hole with a dual-curing resin, and then performing a thermal curing operation to form a resin plug with an inner depression in the via hole, and performing a silk screen solder mask operation, a vacuum operation, a photocuring operation, and a baking operation on the first and second surfaces of the board body formed with the resin plug, respectively, to solidify the solder mask ink. Through this method, the bonding force between the board surface oil and the resin plug in the plug hole can be increased, the connection strength between the solder mask ink layer and the board body can be improved, and the via hole of the board body can be better protected, which is particularly suitable for the application of new energy vehicles in harsh environments.

The present invention lies in the field of 3D printing methods. In particular, the invention relates to 3D printing methods for the production of a 3D part in a layer-by-layer manner, wherein the printable composition is a pasty polyurethane composition comprising at least one polyisocyanate resin, at least one monomer and / or prepolymer that is polymerizable by exposure to radiation and at least one photoinitiator, wherein the pasty polyurethane composition has a viscosity factor (1.5 / 15) of at least 2 at application temperature.

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.