13 results about "Dual cure" patented technology

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.

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 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.

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

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.

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 invention belongs to the technical field of coatings, and particularly relates to a dual-curing coating as well as a preparation method and application thereof. The dual-curing coating provided by the invention is prepared from the following raw materials in parts by mass: 15-35 parts of a polyurethane acrylate oligomer containing an isocyanate group; 30 to 60 parts of hydroxyl resin; 15 to 25 parts of a reactive diluent; 1 to 7 parts of a photoinitiator; 0.5 to 5 parts of an adhesion promoter; the polyurethane acrylate oligomer containing the isocyanate group is prepared from the following raw materials in parts by mass: 65 to 350 parts of isocyanate; 25 to 40 parts of acrylic acid hydroxyl ester; 3 to 30 parts of dihydric alcohol and / or polymer polyol with two functional groups; 0.003 to 1 part of a catalyst; 0.0005 to 10 parts of a polymerization inhibitor; the paint has excellent solvent wiping resistance and good paint film adhesion and flexibility.

The present disclosure provides a coating composition formed from a dual cure chemistry. The dual cure chemistry may comprise ATRP and epoxy-polysiloxane or ATRP and polyurea. The coating composition may include a first coreactive component and a second coreactive component. The first coreactive component may include a first catalyst, a ligand, and either an epoxy-polysiloxane resin or an amine. The second coreactive component may include a reducing agent and either a polyamine / aminosilane and a second catalyst or an isocyanate. Either or both of the first and second coreactive components may include an initiator and a monomer.

A two-part adhesive is provided that combines light curing and redox curing to reduce processing time when bonding components onto a substrate. A fluorescent dye is added to the adhesive to increase the light-curing rate without affecting the final bonding strength by redox curing. The adhesive may be used to bond magnets to substrates such as C5 coasted steel, stainless steel, aluminum, or anodized aluminum.