57results about How to "Excellent surface curing" patented technology

The invention relates to the field of coatings and particularly discloses an ultraviolet-thermal curable coating. The ultraviolet-thermal curable coating is prepared from the following raw materials in percentage by weight: 17.5-25% of aliphatic polyurethane acrylate, 5-12.5% of hydroxy acrylic resin, 7-17.5% of reactive diluent, 1.8-4.5% of photoinitiator, 0.2-0.6% of leveling agent, 0.05-0.2% of defoamer, 40-60% of inert solvent and 2-5% of aliphatic polyurethane acrylate containing an NCO group. The ultraviolet-thermal curable coating provided by the invention has the advantages that 1. the curing depth is not limited by the light transmission capacity; 2. curing is easy to perform in a colored system; and 3. curing can be performed in a shadow zone at which ultraviolet rays can not arrive.

An object of the present invention is to provide an artificial nail composition having improved curability. Another object of the present invention is to provide an artificial nail composition which causes less yellowing and has excellent internal curability.

The artificial nail composition comprises:

• • a component (a): a compound having at least one radical polymerizable unsaturated double bond in the molecule, and a component (b): a photopolymerization initiator selected from (i) an acylphosphine oxide-type photopolymerization initiator and (ii) a mixture of an acylphosphine oxide-type photopolymerization initiator and an α-hydroxyalkylphenone-type photopolymerization initiator, wherein the amount of the component (b) is 0.05 to 4.00 parts by weight with respect to 100 parts by weight of the component (a). It is preferred that the acylphosphine oxide-type photopolymerization initiator is monoacylphosphine oxide and/or bisacylphosphine oxide, and the α-hydroxyalkylphenone type polymerization initiator is 1-hydroxy-cyclohexyl-phenyl-ketone or 2-hydroxy-2-methyl-1-phenyl-propan-1-one.

The present invention discloses a photocurable composition for forming an anti-fogging coating, comprising: (A) a urethane compound containing at least two (meth)acryloyl groups and a polyoxyalkylene chain in a molecule thereof, (B) a compound having at least two (meth)acryloyl groups and at least two hydroxyl groups in a molecule thereof, obtained by reacting at least two components consisting of an epoxy compound and (meth)acrylic acid, (C) a compound having an ethylenic unsaturated group other than the components (A) and (B), and (D) a photopolymerization initiator, and also discloses a method for forming an anti-fogging coating using this composition.

A photocurable and thermosetting resin composition developable with a dilute alkaline solution containing: (A) an ethylenic unsaturated group-containing and carboxylic acid-containing resin, (B) a coumarin skeleton-containing sensitizer having a maximum absorption wavelength of 360 to 410 nm, as represented by the following Formula (I):

(C) a photopolymerization initiator, (D) a compound having two or more ethylenic unsaturated groups in the molecule, (E) a filler, and (F) a thermosetting component.

The purpose of the present invention is to provide a hardenable resin composition which can have superior surface hardenable property by irradiation with an active energy beam of 350 to 420 nm in wavelength. The hardenable resin composition contains: a compound (A) having at least one unsaturated double bond; a compound (B) having an oxime ester group; and a benzophenone compound (C ) containing sulfur atoms and hardened with an active energy beam of 350 to 420 nm in wavelength.

The present invention discloses a photocurable composition that is combinable with a thermally curable clearcoat composition to form a dual curable composition that is useful for forming clearcoats with improved sag resistance. The photocurable composition of the invention includes at least one photocurable oligomer; a first photoinitiator that absorbs light in a first spectral region such that curing of the photocurable composition preferentially occurs near the surface of the of the coating; and a second photoinitiator that absorbs light in a second spectral region such that curing of the photocurable composition occurs throughout the coating. The present invention also provides a method of coating a substrate with a dual curable composition.

The invention provides a photo/thermal initiation fast curing adhesive which comprises the following components by mass: 40-70 parts of one or more epoxy resin matrixes, 20-40 parts of a latent thermal initiation curing agent, 0.5-5 parts of one or more photo initiation curing agents, 0.1-2.5 parts of one or more photosensitizers, 15-35 parts of one or more flexibilizers, and 20-40 parts of one or more fillers. A preparation method of the photo/thermal initiation fast curing adhesive comprises the following steps: at first, under the action of ultraviolet light, the photo initiation curing agents are used for initiating part of epoxy resin to perform a curing reaction, under the action of heat released during the curing reaction and an external heat source, the temperature of the cured part reaches the latent imidazole initiation reaction temperature of 70-90 DEG C, a latent imidazole complex is activated, epoxy resin is initiated to be quickly cured within 3 min, the automatic, high-quality and fast-cementing connection requirements of a car composite material are met, and the technical problems such as mismatch between the traditional adhesive curing initiation condition and the connection working condition of the car composite material are solved.

The invention relates to the field of the coatings and in particular relates to an ultraviolet curable antifouling flame-retardant coating for a plastic circuit board. The ultraviolet curable antifouling flame-retardant coating for the plastic circuit board, namely an ultraviolet curable antibacterial coating for a metal building material, is characterized by being prepared from the following raw materials in percentage by weight: 30%-45% of mixed UV resin of aliphatic polyurethane diacrylate and bisphenol A epoxy diacrylate, 3%-5% of graphitized carbon nanofibers, 5%-12% of an initiator, 1%-3% of surface auxiliaries, 5%-10% of a cosolvent, 10%-20% of a reactive diluent, 1%-2% of a nano-silver antimicrobial agent and 10-30% of an inert solvent. The ultraviolet curable antifouling flame-retardant coating for the plastic circuit board has the antifouling and flame-retardant capability without affecting the intrinsic performance indexes of the coating.

The invention relates to an aromatic sulfonium salt compound and in particular relates to triaryl sulfonium salt containing 1-methyl-2-phenyl indole skeleton as well as a preparation method and application thereof. The preparation method of the triaryl sulfonium salt containing 1-methyl-2-phenyl indole skeleton comprises that 1-methyl-2-phenyl indole is taken as a raw material, diphenyl disulfide is taken as a sulfur source, a C-S bond coupling reaction is carried out for synthesizing aromatic sulfide, then a reaction is carried out on the aromatic sulfide and diaryl iodonium salt under the copper-catalyzed condition, so that the triaryl sulfonium salt containing 1-methyl-2-phenyl indole skeleton is obtained. Ultraviolet absorption wavelength of the triaryl sulfonium salt containing 1-methyl-2-phenyl indole skeleton can be more than 290nm in a red shift manner, the triaryl sulfonium salt containing 1-methyl-2-phenyl indole skeleton can be applied to an ultraviolet curing composition, especially ultraviolet curing coating, as a positive ion photoinitiator and has good reaction activity, surface curability and solubility, and the special group, namely 1-methyl-2-phenyl indole, is introduced, so that photo-initiation performance of the triaryl sulfonium salt containing 1-methyl-2-phenyl indole skeleton is effectively improved.

The invention discloses a photopolymerization monomer containing an active amine structure, and relates to the field of polymer material synthesis. The photopolymerization monomer is proposed based onthe problem that an initiator in an existing photocuring system is easy to migrate from a cured coating, and the photopolymerization monomer has the following chemical structural formula: (as described in the specification). The invention also discloses a preparation method of the photopolymerization monomer, which comprises the following steps: (1) reaction of glycidyl methacrylate and acrylic acid in the presence of a catalyst and a polymerization inhibitor; (2) dripping of secondary amine; and (3) purification of reaction products. The preparation method provided by the invention has the following beneficial effects: the reaction process is simple, the process conditions are easy to control, and an amine structure is introduced into a polymerization system, so that certain oxygen resistance and polymerization inhibition performance can be obtained, thereby obtaining better surface curing performance, avoiding migration of small molecular compounds, and preventing adverse effects onthe photocuring system.

An object of the present invention is to provide a dental composition with less change of color tone before and after curing and less color change after curing, and also with excellent thin-layer surface curability.

Disclosed is a dental composition comprising 0.01 to 10 parts by weight of at least one kind of (a) a visible light.-photopolymerization catalyst compound and one or more kinds of (b) di(meth)acrylate compounds represented by the general formula (I):

wherein R₁ and R₂ each independently represent hydrogen or a methyl group, and a repeating unit number n of an ethylene oxide group is from 9 to 50.

The invention relates to an amine co-initiator and a preparation method and application thereof. The structure of the amine co-initiator comprises amido and a triazine ring structure, the amine co-initiator is mixed with a hydrogen abstracting type photoinitiator for use, the curing rate can be effectively increased, yellowing after curing is relieved, oxygen inhibition is inhibited, and then the application effect of the amine co-initiator is improved; compared with EHA and EDB adopted by a traditional light curing system, the amine co-initiator has the advantages that the curing rate is obviously increased, and the curing effect is obviously improved; and the use amount of the amine co-initiator in a photocuring composition is small, and the cost is low.

The invention relates to the field of ink and particularly relates to water-resistant, scratch-resistant and ultraviolet-cured ink for glass. The water-resistant, scratch-resistant and ultraviolet-cured ink for glass is prepared from the following raw materials in percentage by mass: 30-45% of mixture of aliphatic polyurethane acrylate oligomer and carboxylic acid modified polyester acrylate, 5-12% of initiator, 1-3% of surface auxiliaries, 5-10% of cosolvent, 10-20% of activated thinner, 1-2% of nano-silver antibacterial agent and 10-30% of inert solvent. The water-resistant, scratch-resistant and ultraviolet-cured ink has an antibacterial function while having good water resistance and scratch resistance, meanwhile, cannot affect the performance indexes of a coating material, and has relatively high salt mist resistance, aging resistance, adhesive power and cold/hot impact resistance.