505 results about "Dual curing" patented technology

Polymer compositions capable of a high degree of curing at relatively low temperatures, and prepregs, adhesives, films and composites formed therefrom are discussed. The polymer compositions include epoxy resin systems and a dual curing system including one or more curing agents containing one or more hydrazine-based curing agents having hydrazine functional groups and one or more amine-based curing agents containing one or more amine functional groups. The hydrazine-amine curing systems enable the polymer composition to achieve elevated levels of gelation or degree of cure at lower temperatures than are achievable with amine functional curing agents alone. Furthermore, this elevated degree of curing of the polymer composition may be achieved with substantially no reduction in tack life and/or out life of the prepreg, adhesive or film or cured state mechanical properties of composites, adhesives or other products fabricated therefrom, such as open hole compression strength and compressive strength after impact. The glass transition temperature of the cured polymer compositions is similarly unaffected.

The invention discloses a flexible substrate used for optoelectronic devices and comprises a flexible substrate; the invention is characterized in that a bonding layer and a conductive thin film are arranged on the surface of the flexible substrate; the conductive thin film is deposited on the surface of the bonding layer; and the material of the bonding layer is an adhesive with a double-curing system comprising UV curing-thermal curing or UV curing-microwave curing or UV curing-anaerobic curing or UV curing-electron beam curing. The substrate solves the problem of poor adhesion between the deposited conductive thin film and the substrate due to low surface energy of the flexible substrate and improves the barrier properties of the substrate on water and oxygen, and also achieves good smoothing effect on the surface of the substrate; besides, the preparation method is simple and effective, which can significantly reduce the substrate production cost and process difficulty and increase the substrate yield rate in the etching process.

The invention discloses a dual-curing composition which comprises addition type silicone oil, hydrogen-containing silicone oil, an inhibitor, a catalyst, a (methyl) acrylic ester compound, a light initiator and an auxiliary, and selectively comprises silicon modified (methyl) acrylic ester, a filler, a reinforced silica resin and a solvent. Due to adoption of the composition disclosed by the invention, dual-curing of heating and ultraviolet light can be conveniently achieved, materials of different properties such as rubber and plastics can be prepared, and materials with different physical characteristics and different color effects can be prepared.

The invention discloses a siloxane modified urethane acrylate hyperbranched oligomer and a preparation method thereof and a multi-curing coating obtained therefrom. The siloxane modified urethane acrylate hyperbranched oligomer is short for Si-PUA aligomer and the weight percentage composition thereof is as follows: 20 wt percent to 50 wt percent of vulcabond, 5 wt percent to 40 wt percent of polylol, 20 wt percent to 50 wt percent of hydroxyl acrylate, 1 wt percent to 20 wt percent of heperbranched polyester, 0.5 wt percent to 10 wt percent of diamino siloxane, 0.001 wt percent to 1 wt percent of catalyst, 0.001 wt percent to 1 wt percent of inhibitor and 5 wt percent to 50 wt percent of reactive diluent. The multi-curing coating containing such Si-PUA aligomer can not only realize ultraviolet light-heat dual curing but also realize moisture curing, thus improving the hardness and enhancing adhesive force of the film thereof and having better properties of water resistance, chemical agent resistance and friction resistance.

The invention discloses a double-curing varnish paint which is prepared from the following components in parts by mass: 3-6 parts of double-curing varnish, 1 part of curing agent and 0.5-1 part of diluter. The double-curing varnish comprises the following components in percentage by mass: 10-60% of hydroxy acrylic resin, 10-30% of UV (ultraviolet) resin, 1-30% of active diluter, 0.5-4% of photoinitiator, 1-3% of antiaging agent, 1-3% of leveling agent, 1-3% of drying agent and 10-30% of solvent. The double-curing varnish paint uses the free-radical polymerization-polycondensation curing system; under the irradiation of UV, the UV resin in the double-curing varnish forms free-radical polymerization under the action of the photoinitiator, and the -OH group contained in the hydroxy acrylic resin in the double-curing varnish and the -NCO group contained in the isocyanate resin in the curing agent are subjected to addition polymerization under the action of heat energy; and the polymers formed by the two polymerization reactions become an mutually-wound endosmosis network structure, thereby enhancing the weather resistance and chemical corrosion resistance of the paint film.

Disclosed herein are dual cure compositions, methods to cure dual cure compositions, the dual cure compositions comprising at least one filler, at least one curable monomer comprising at least one of an ethylenic unit or cyclic ether unit or mixture thereof; at least one photoinitiator; and at least one thermal initiator. The method comprises the step of photocuring by exposing the compositions to radiation to at least partially photocure the composition, which in turn generates an exotherm which initiates thermal curing. The methods may be used to make cured thick compositions and sandwich structures. Articles made by the methods are also described.

The invention discloses dual-curable polysiloxane acrylate resin and a preparation method thereof, belonging to the technical field of ultraviolet light/moisture dual-curing of organosilicone. The dual-curable polysiloxane acrylate resin has a structural formula (shown as a drawing), wherein R1 is a formula (shown as a drawing), and R2 is OCH3. The preparation method comprises the following stepsof: under the protection of N2, mixing terminal hydroxyl polydimethylsiloxane with methacryloxy propyl trimethoxy silane, adding a solvent and a catalyst, and carrying out an ester exchange reaction to obtain a preproduct; carrying out rotary steaming to remove the solvent, and obtaining a mixture; and at room temperature, extracting by using anhydrous methanol, carrying out centrifugation, further, removing a solvent, and obtaining the dual-curable polysiloxane acrylate resin. The resin is clear and transparent and has good stability for reserving at normal temperature; and the preparation method is simple, short in cycle, and low in cost, and the resin per se does not contain an organic solvent.

The present invention provides a preparation method for a light-heat dual-cured woodware UV varnish coating. The method comprises: uniformly mixing an acrylic acid monomer, a catalyst and a polymerization inhibitor; adding the resulting mixture to epoxy resin with a temperature of 90-120 DEG C to carry out a reaction at a certain temperature; adopting acid value detecting to monitor the extent of the reaction, wherein the epoxy acrylate (EA) is obtained when the acid value is reduced to less than 5 mg/g; adding a thermal initiator, a photoinitiator, an antifoaming agent, a wetting and dispersing agent, a thickening agent and a leveling agents to the EA, then mixing and stirring to obtain the UV varnish coating. The prepared UV varnish coating through the method provided by the present invention has the dual functions of light curing and heat curing, the surface dry can be rapidly achieved in 4-8 seconds under the light intensity of 250-400 mJ/cm<2>, the film forming and the curing can be achieved in 1-5 hours at the temperature of 50-70 DEG C. In addition, the prepared UV varnish coating has characteristics of high adhesion, good chemical corrosion resistance, high film hardness and low cost, and provides more excellent construction performance, curing method and film performance than ordinary UV-cured coatings.

The invention discloses ultraviolet-anaerobic dual-curing adhesive which is made from the following raw materials of corresponding part by weight: 100 to 135 portions of prepolymer, 10 to 75 portions of diluent, 1 to 4 portions of light initiator, 0.3 to 0.6 portion of accelerant, 0.2 to 0.5 portion of reducing agent, 0.5 to 1.1 portions of oxidant, 0.5 to 1.5 portions of chelating agent and 0.2 to 0.5 portion of polymerization inhibitor. The adhesive of the invention has fast curing speed and can obtain initial bonding strength after being irradiated by ultraviolet for seconds; by means of anaerobic curing mechanism, crosslinking curing is continued after the ultraviolet is removed, thereby further improving the bonding strength of the adhesive so as to meet the requirements of bonding strength of devices in the electronic and electric appliance industries.

The invention relates to a flexible circuit conductive composition for a flexible printed circuit board (FPC), a preparation method and a using method thereof. The preparation method comprises the following steps of: adding photocurable resin and an optical activity monomer into a conductive nanometer material dispersion liquid and then preparing the composition by adopting a double-curing mode such as firstly photocuring and then thermal treatment. The photocuring leads the surface coating to be rapidly cured so as to achieve good mechanical property; and the thermal curing leads the coatingto be cured completely so as to reach the deep curing requirements. The thermal treatment leads nanometer metals to be sintered together so as to achieve good conductive performance. The prepared conductive system obtains a predesigned pattern in the specific area of a base material in a screen printing or nanometer impressing mode; the conductive pathway is obtained after the double curing and has the advantages of short curing time, low curing temperature, good electrical conductivity, high resolution ratio; and the prepared conductive film has the advantages of good adhesiveness, high hardness and good flexibility.

The invention relates to an optically-transparent dual-curing adhesive, and a preparation method and a use thereof, and concretely relates to an optically-transparent, ultraviolet-curable and heat-curable adhesive, for example, the adhesive can be used for bonding the touch screen and the substrate of an electronic product.

The invention provides a water-dilutable ultraviolet-thermal double curing coating composition and a preparation method thereof. The components of the double curing coating composition in percentage by weight are: 3.5 to 60 percent of water-dilutable urethane acrylate oligomer, 17 to 47 percent of water-dilutable polyurethane polylol, 20 to 49 percent of water-dilutable curing agent, 0.4 to 9 percent of light trigger and 0.4 to 1.6 percent of auxiliary agent. The preparation method for the double curing coating is simple and does not require complex equipment; and the working life of the coating is long and reaches as long as 9 hours; the coating obtained can be used for preparing a coating by the functional methods of spray coating, brush coating and roller coating; ultraviolet curing can be completed within a short period of time between 10 and 30 seconds, and thermal curing can be completed within a period of time between 1 and 3 minutes at a temperature of between 40 and 60 DEG C; a paint film obtained after double curing has good leveling property, flexibility, shock resistance and adhesion and high hardness; and the coating does not contain an organic solvent and a reactive diluent, and is an environment-friendly coating.

The invention belongs to the technical field of insulating paint, in particular relates to an insulating paint belonging to the dual-curing field of ultraviolet curing and thermocuring. The invention is applied for motor insulation processing and has the advantages of long storage life, high curing speed, no smell, being convenient in operation, no volatilization of organic matters during curing and the like. Compared with the common dipping paint technology, the dipping technology overcomes the problems of loss and small sagging amount in the baking and solidifying process of the dipping paint; in addition, the dipping technology saves material, improves product quality and lightens environment pollution. The dipping and insulating paint has good thermostability and is suitable for common or vacuum pressure dipping paint for H and C-grade motor and electrical appliances.

The invention provides a dual-curing adhesive composition, comprising a) (methyl)-acrylics oligomer with at least an unsaturated group; b) monofunctional monomer, multifunctional monomer or mixture thereof; c) (methyl)-acrylate resin with isocyanate group; d) polyester polyol resin; e) an initiator; and f) a plasticizer with refractive index of more than 1.49. The dual-curing adhesive composition has themocuring and photocuring properties at the same time, and has good translucency and high refraction index. The dual-curing adhesive composition can be used in optical products, and preparing process is simplified. The dual-curing adhesive composition has good adhesiveness, good optical property, and good reprocessing property.

The invention discloses humidity and ultraviolet dual-cured polyurethane woodware coating and a preparation method thereof. A synthesis method includes synthesizing initial polyurethane polymer I, polyurethane pre-polymer II, polyurethane pre-polymer III, polyurethane acrylate oligomer and ultraviolet cured woodware coating. The humidity and ultraviolet dual-cured polyurethane woodware coating is mainly prepared by aliphatic diisocyanate, dihydric alcohol pre-polymer, polyhydroxy acid, epoxy resin and hydroxy acrylic ester and the like, and by adding auxiliaries such as photoinitiators, flatting agents, defoamers, substrate wetting agents and catalysts, the ultraviolet cured woodware coating is prepared. The ultraviolet cured woodware coating can form films and be cured under irradiation of ultraviolet, also can be cured by humidity in the air within 5 hours at the room temperature, and has the advantages of high solid, NCO (isocyanate) group content and adhesion force, fine resistance to chemical corrosion, high film coating hardness and fine storage stability and the like, can be used for irregular coating surfaces, hone finished UV (ultraviolet) paint and UV colored paint and the like where cannot be irradiated by the ultraviolet.

The invention provides an ultraviolet-thermal double curing polyaniline anti-corrosive coating and a preparation method thereof. In the coating, polyaniline is adopted as a main anti-corrosive material, and oligomer, a reactive diluent, polyurethane polylol, polyaniline, filler, light trigger and an auxiliary agent are used for preparing filtrate of the coating; and the filtrate and a polyurethane curing agent are stored respectively and uniformly mixed in proportion for use. The anti-corrosive paint has good anti-corrosive effect on different metals, not only can perform ultraviolet curing crosslinking but also can perform thermal curing crosslinking, well overcomes the defect of incomplete curing of an ultraviolet curing anti-corrosive paint, has the characteristics of resisting acid medium corrosion and alkali medium corrosion, is suitable to be used under the condition of a severe environment and particularly suitable for corrosion protection under the condition of a marine environment, does not contain heavy metals such as plumbum, chromium and zinc, and simultaneously does not contain any organic solvent in a formula. Therefore, the coating does not have the problem of environmental pollution during the production process and the use process, and is a completely environment-friendly coating.

The invention discloses ultraviolet ray and moisture dual-cured modified polyurethane and a preparation method thereof, belonging to the technical field of high polymer materials. The structural formula of the modified polyurethane is represented by the general formula I in the specification. The ultraviolet ray and moisture dual-cured modified polyurethane disclosed by the invention has dual curing manners; the disadvantages of the single light curing manner are overcome; simultaneously, because designed resin molecules contain double-bond groups, the curing energy can be reduced; the crosslinking density is increased; the curing depth problem is solved; the weather fastness of the resin is increased; and the temperature-resistant property of the resin is improved.

The invention provides a dual-curing adhesive composition which comprises the following components: component (a): epoxy resin; at least one selected from component (b) and component (c), wherein the component (b) is a (methyl) acrylate monomer, and the component (c) is oligomer with a (methyl) acrylyloxy group; component (d): a thermopolymerization catalyst used for catalyzing a thermopolymerization reaction of the component (a); and component (e): a photopolymerization initiator used for initiating an photopolymerization reaction of the component (a) and at least one material selected from the component (b) and the component (c), wherein the component (e) is a mixture of a cationic photopolymerization initiator and a free radical photopolymerization initiator. The dual-curing adhesive composition of the invention is used for bonding or lamination between light transmitting substrates, or between a light transmitting substrate and a lightproof substrate. The invention also provides a method for bonding substrates.

The invention discloses a dual solidifying paint for wood and metal substrate, which is characterized by the following: the paint component A is ultraviolet solidifying composition, which contains 30-60% low-activity oligomer; the activity thinner is composed of 5-20% 1-alkylene unsaturated and doubly-bond compound, not more than 20% 2-alkylene unsaturated and doubly-bond compound, 5-20% not less than 3-alkylene unsaturated and doubly-bond compound, 1.0-10% photopolymer initiator, not more than 20% adhesion promotion resin, not more than 30% thinner; the composition B contains not less than 3 NCO hardener; the weight rate of component A and B is (85- 95):(5-15).

A dual curable, liquid adhesive composition capable of polymerization by exposure to actinic radiation and moisture. The composition is particularly useful for liquid adhesives for electronic applications. The composition comprises an alkoxysilane functional polyurethane acrylate oligomer; a free radical polymerizable reactive diluent; a free radical photoinitiator; a catalyst for moisture curing of silane groups; and an optional alkoxysilane functional oligomer having a polyolefin group; an optional acrylate or methacrylate functional polyurethane acrylate oligomer; an optional hydroxyl terminated monoacrylate or monomethacrylate functional reactive diluent; an optional UV-absorber and hindered amine light stabilizer antioxidant; an optional wax capable of reducing oxygen inhibition; an optional 1,3 dicarbonyl compound chelating agent; an optional thixotropic agent; and an optional adhesion promoter. optional adhesion promoter.

The invention discloses an ultraviolet-heat dual-curing adhesive composition and a preparation method thereof. The ultraviolet dual-curing adhesive composition comprises the following components in percentage by mass: 20-50% of polyurethane modified epoxy monoacrylate, 10-25% of reactive diluent, 5-40% of conductive filler, 1-5% of silane coupling agent, 1-5% of photoinitiator and 1-5% of heat curing agent. The ultraviolet-heat dual-curing adhesive is high in curing speed; after a few seconds of ultraviolet irradiation, the acrylate double-bond group in the system can be quickly cured, so that the adhesive has preliminary bonding strength; and then by means of heating, the epoxy group is further subjected to crosslinking and curing according to a heat curing mechanism, thus further improving the bonding strength of the adhesive. The adhesive has high bonding strength and favorable conductivity, and can meet the bonding requirements of devices in electronic industry and the like. Besides, the adhesive disclosed by the invention is solventless, simple to operate, high in curing speed, high in bonding strength and suitable for batch production on a production line.

The invention relates to a photo-thermal dual-curing anisotropic conductive adhesive film and a preparation method thereof. The anisotropic conductive adhesive film is prepared from raw materials in percentage by mass as follows: 35%-45% of epoxy resin, 10%-25% of acrylic resin, 5%-10% of a cross-linking agent, 2%-7% of a diluent, 0.6%-1% of a photoinitiator, 2.5%- 4% of a thermal curing agent, 5%-10% of an accelerant, 0.5%-2% of a silane coupling agent and 20%-35% of conductive balls. The preparation method comprises steps as follows: the raw materials are blended, subjected to rotary coating and then subjected to ultraviolet exposure processing, and the anisotropic conductive adhesive film is prepared. The anisotropic conductive adhesive film has good conductive performance, excellent weather fastness, low curing temperature, long storage time, high curing degree and high bonding strength; the preparation process is simple, the cost is low, and the application prospect is broad.

The invention belongs to the technical field of adhesives, and particularly relates to an ultraviolet-heat dual curing optical adhesive containing epoxidized polybutadiene resin. The ultraviolet-heat dual curing optical adhesive comprises the following components in percentage by weight: 14.5%-45% of epoxidized polybutadiene resin, 10%-40% of alicyclic epoxy modified resin, 5%-15% of polyolefin liquid rubber, 25.5%-35% of an acrylic ester reactive diluent, 2.4%-3.4% of a free radical photoinitiator, 0.1%-0.2% of a cationic photoinitiator and 2%-2.5% of a peroxide initiating curing agent. The optical adhesive disclosed by the invention is relatively completely solidified at a shaded part, a dark adhesive layer part or a thick adhesive layer part, has excellent optical properties such as high refractive index and high transmittance after being solidified, has the advantages of shock resistance, low yellowing coefficient, low haze, low shrinking percentage, easiness in repairing and good flexibility, meets the requirements of optical, physical and chemical properties of display devices, and is suitable for fast-tempo and high-efficiency production processes.

The invention provides a coating which is formed under the condition of photo-thermal dual-curing and is good in hardness and high in wear resistance. The coating is obtained by performing UV (ultraviolet) curing at first and then performing thermal curing on the following materials in percentage by weight: 30-60% of a low polymer with -OH, 15-36% of a monomer with -OH, 19-30% of a closed type polyisocyanate curing agent with -NCO, 2-5% of a photoinitiator and 0.2-0.8% of an auxiliary agent, wherein the low polymer with -OH is bisphenol A epoxy acrylate, polyacrylate or polyurethane acrylate, and the monomer is one, two or three types of ethyl metrhacrylate, tri(propylene glycol) diacrylate or trimethylolpropane triacrylate. The polyurethane polymer and the polyacrylate polymer in the coating provided by the invention are crosslinked by virtue of chemical bonds, and a formed single-molecule space structure is more compact in structure, and is obviously improved on hardness and wear resistance. The invention also provides a preparation method of the coating.

The invention provides a high-light-transmittance UV-moisture dual-curing adhesive. The high-light-transmittance UV-moisture dual-curing adhesive is prepared from, by weight, 30-70 parts of polyurethane prepolymer, 1-20 parts of reactive diluent, 1-10 parts of photoinitiator, 0.01-0.5 part of flatting agent, 0.1-1 part of polymerization inhibitor and 0.1-10 parts of silane coupling agent. The polyurethane prepolymer is synthesized by aliphatic series diisocyanate, dihydric alcohol or polyhydric alcohol and hydroxy containing epoxy monoacrylate, and the molar ratio of aliphatic series diisocyanate to dihydric alcohol or polyhydric alcohol to hydroxy epoxy monoacrylate is (1-1.2):1(0.5-0.8). According to the adhesive, fast curing after UV initiation can be achieved, a stable state of moisture curing non-initiation before UV initiation can be achieved, and good comprehensive performance is achieved.