262results about How to "High degree of curing" patented technology

Thermoset polymer particles are used in many applications requiring lightweight particles possessing high stiffness, strength, temperature resistance, and/or resistance to aggressive environments. The present invention relates to the use of two different methods, either each by itself or in combination, to enhance the stiffness, strength, maximum possible use temperature, and environmental resistance of such particles. One method is the application of post-polymerization process steps (and especially heat treatment) to advance the curing reaction and to thus obtain a more densely crosslinked polymer network. In general, its main benefits are the enhancement of the maximum possible use temperature and the environmental resistance. The other method is the incorporation of nanofillers, resulting in a heterogeneous “nanocomposite” morphology. In general, its main benefits are increased stiffness and strength. Nanofiller incorporation and post-polymerization heat treatment can also be combined to obtain the benefits of both methods simultaneously. The present invention relates to the development of thermoset nanocomposite particles. It also relates to the optional further improvement of the heat resistance and environmental resistance of said particles via post-polymerization heat treatment. Furthermore, it also relates to processes for the manufacture of said particles. Finally, it also relates to the use of said particles in the construction, drilling, completion and/or fracture stimulation of oil and natural gas wells; for example, as a proppant partial monolayer, a proppant pack, an integral component of a gravel pack completion, a ball bearing, a solid lubricant, a drilling mud constituent, and/or a cement additive.

The invention discloses a low-shrinkage medium-temperature-cured high-efficiency flame-retardant unsaturated polyester fiberglass reinforced plastic board and a preparation method thereof. The low-shrinkage medium-temperature-cured high-efficiency flame-retardant unsaturated polyester fiberglass reinforced plastic board is prepared from the following components in parts by weight: 50-60 parts of unsaturated polyester resin, 20-30 parts of a low-shrinkage additive, 1-3 parts of an accelerant, 0.5-2 parts of an initiator, 2-5 parts of a medium-temperature curing agent, 0.1-0.5 part of a thickening agent, 8-15 parts of a novel halogen-free flame retardant, 100-130 parts of inorganic filler, 2-3 parts of a release agent and 100-150 parts of fiberglass. The curing degree, the bending strength and the flexibility of the low-shrinkage medium-temperature-cured high-efficiency flame-retardant unsaturated polyester fiberglass reinforced plastic board can be improved; residual styrene in the fiberglass reinforced plastic board is reduced.

The invention discloses a novel UV-cured adhesive for plastic and a preparation method thereof. The UV-cured adhesive is prepared by the following steps of: adding polyurethane acrylate and a monomer diluent into an epoxy acrylate resin, stirring at the constant temperature of between 50 and 55 DEG C for 3 to 4 hours, and adding a photoinitiator, an accelerating agent and a polymerization inhibitor; and regulating the temperature to between 60 and 70 DEG C, stirring at the constant temperature for 1 to 2 hours and discharging to prepare the novel UV-cured adhesive. The UV-cured adhesive comprises the following components in percentage by weight: 30 to 60 percent of polyurethane acrylate, 10 to 30 percent of epoxy acrylate resin, 4 to 5 percent of photoinitiator, 25 to 65 percent of monomer diluent, 0.1 to 0.9 percent of accelerating agent and 0 to 0.2 percent of polymerization inhibitor. The product is mainly applied to adhesion of PVC, ABS, PC, PMMA and other plastics, and has the advantages of no solvent, simple and easy operation and suitability for mass production.

The invention relates to the display field, in particular to a seal agent and a display device. The seal agent comprises an epoxy resin, acrylic ester and scatterers. According to the seal agent and the display device, the scatterers are added in the seal agent, when ultraviolet light radiates the seal agent, the scatterers in the seal agent scatter the incident ultraviolet light irregularly in all directions, the scattered and incident ultraviolet light radiates on the surfaces of scatterers in other positions, and further scattering occurs, so that areas which cannot be directly radiated by the ultraviolet light in the seal agent can be radiated by the ultraviolet light, and the curing degree of the seal agent is increased.

The invention relates to a method for forming a grating for machine tool measurement in a two-step solidifying rolling pressing forming manner, which comprises the following steps: 1) coating an ultraviolet light solidifying adhesive layer on a grating blank substrate; 2) manufacturing a rolling mould having a prototype grating structure on the surface of a cylindrical mould, making an alignment mark, and polishing and performing low surface energy treatment on the surface of the rolling mould; 3) coating a flexible film on the adhesive layer on the grating blank substrate, carrying out primary exposure and peeling the film; 4) comparing the alignment mark on the grating blank substrate with an acquired alignment mark image on the surface of the rolling mould, adjusting and calibrating; 5) gluing the rolling mould with the grating, applying a pressing force, and compounding the prototype grating structure on the surface of rolling mould on the adhesive layer on the surface of the substrate; 6) carrying out exposure on the compounded ultraviolet light solidifying adhesive layer; and 7) collecting and packaging the grating. According to the method, the required pressing force is small, and thus, the substrate deformation and stress concentration are avoided. The method has high production efficiency and can be used for realizing the mass production of the grating for large-area and altitude machine tool measurement.

The invention relates to electronic materials and preparation, and aims to provide a halogen-free flame-retardant solvent-free double-curing ink composition and a preparation method thereof. The composition comprises the following components: low-viscosity epoxy resin, epoxy resin containing phosphorus or nitrogen, glycidyl acrylate reactive diluent, partially-esterified phenolic epoxy acrylate, imidazole curing agent, free radical polymerizing initiator, halogen-free flame retardant, inorganic filler and additives. The preparation method comprises the following steps of: mixing, dispersing and grinding the raw materials until the viscosity reaches 40 to 50 Pa.s per 25 DEG C, dispersing and uniformly agitating the raw materials after the grinding is stopped, and finally filtering, filling and packaging the raw materials. The halogen-free flame-retardant solvent-free double-curing ink composition has the advantages that the possibility of fire hazards caused by ink introduction when a hole is blocked can be reduced by virtue of halogen-free and flame-retardant performance; with adoption of a double-curing technology with free radical polymerizing and epoxide ring-opening addition polymerization, the halogen-free flame-retardant solvent-free double-curing ink composition has a high curing degree, a high temperature in thermal deformation, a low expansion coefficient, low water absorption and high heat resistance; the viscosity of the ink is easy to adjust, and thus the requirements on the use of the ink in different seasons can be ensured; and the curing material is moderate in rigidity and has the characteristic of grindability.

The invention particularly provides a visible-light-quick-curing vinyl ester resin composite prepreg, and a preparation method and application method thereof, belonging to the field of repair of a fiber-reinforced resin-base structure with certain thickness. A special vinyl ester resin is used as a matrix; the proper visible light initiator, thermal initiator and other aids are selected to constitute the light-thermal composite initiation system; magnesium oxide is used as a thickener; different types of fabrics are selected as fiber-reinforcing materials according to performance requirements; and a proper composite technique is utilized to prepare the composite prepreg with certain thickness. The visible-light-curing prepreg material can be cured within 5 minutes under the single-side irradiation of visible light, and the once-time photocuring thickness can reach 10mm or above, thereby basically solving the problems of poor operability, poor safety and insufficient film thickness under ultraviolet light. The visible-light-curing prepreg can be subjected to mass application in the field of structure repair.

Hardeners are provided for curing epoxies at lower temperatures than currently available hardeners while retaining superior mechanical and thermal properties. A first component is selected from imidazole, dicyandiamide, or a mixture of polyamines and tertiary amines. A poiyol mixture is then selected. The first component is combined with the polyol mixture to form a hardener. The hardener is combined with epoxy resin and is cured. A method for selecting a hardener to yield an epoxy-hardener system with good properties after curing at a specified temperature and time includes selecting components for the hardener so the glass transition temperature of the cured epoxy-hardener system is not significantly lower than 45° C. above the cure temperature. The method includes steps for adjusting and controlling the ultimate glass transition temperature to maximize the mechanical properties of the epoxy-hardener system. The method regularly produces hardened epoxy systems having about 90% or more epoxy groups reactect.

The invention discloses a resin anchoring agent for an initiation system. In the invention, cobalt octoate or cobalt naphthenate is used as a promoter, or cobalt octoate or cobalt naphthenate and tertiary amine promoters are mixed to form a compound promoter. A novel initiator is hydroperoxides, particularly methyl ethyl ketone peroxide and cyclohexanone peroxide. In the invention, resin anchoring agent of all models can be designed and produced, the longest gelation time can be adjusted to 10 hours or even a longer time, the curing can be continued later on when the curing of a reaction is inadequate, the curing degree is high, and the final strength is high. Moreover, the period of validity of the resin anchoring agent can be prolonged for over 1 time.

The invention provides an efficient anti-sticking UV release paint applied to a pressure-sensitive adhesive as well as preparation and application of the efficient anti-sticking UV release paint. The paint comprises the following ingredients in percentage by weight: 3-8% of a photoinitiator, 3-5% of an auxiliary initiator, 20-40% of an active diluent, 15-45% of organic silicon-acrylic resin and 25-45% of non-silicon acrylic resin. The system of free radicals and the cationic composite initiator is adopted, a sensitization effect realized through the synergistic effect of the free radicals and the cationic composite initiator better solves the problems of oxygen inhibition and slow curing caused by the single initiator, meanwhile, the photo-curing speed is high, the solubility is good, the absorption wavelength reaches 390 nm and the paint is an efficient, energy-saving and environment-friendly photo-cured release paint.

A curable composition, including: a polymerizable compound (a) including an ethylenically unsaturated bond; a binder polymer (b); a radical polymerization initiator (c); and an alicyclic compound (d) including a urea bond is provided.

Aresin matrix with strong microwave absorbability and a preparation method thereof belong to the field of composite materials. In the invention, high-performance epoxy resin with strong polarity is selected as matrix resin, a microwave absorptioncomponent is added for adjusting microwaveresponsiveness and viscosity of a resin system to adapt to liquid molding by winding and the like, a curing agent is selected for adjusting themicrowaveresponse activity of the resin system, and the mechanical property, the heat resistance and thedimensional stability of the resin matrix are achieved; on the basis, an ionic liquid modified nanometer component is adopted for further enhancing the microwaveresponsiveness of the resin matrix. By adjusting the component structure and thematch ratio of the matrix resin, the microwave absorption component, the curing agent,theionic liquid modified nanometer componentand the like, a microwave curing resin system with good microwave absorbability, good dispersity of the nanometer component, proper viscosity, uniform curing, excellent comprehensive mechanical property, good heat resistance and high dimensional stability is developed. The resin matrix has great guiding significance for preparation of fiber composite materials and can be widely applied to the fields of aerospace and the like.

The invention discloses a high-covering black UV silkscreen printing ink. A preparation method for the high-covering black UV silkscreen printing ink comprises the following steps: preheating acrylate and then mixing the preheated acrylate with a part of active monomer; then adding a dispersant and carrying out primary dispersion; then successively adding pigment and a filling material and carrying out secondary dispersion; carrying out grinding to obtain color paste; mixing a phosphine oxide photoinitiator with residual active monomer; and adding the color paste, an organosilicon antifoaming agent and an organosilicon leveling agent and carrying out uniform dispersion so as to obtain the high-covering black UV silkscreen printing ink. The high-covering black UV silkscreen printing ink provided by the invention is reasonable in composition; all the components are in good compatibility; and the prepared printing ink has excellent comprehensive properties and good storage performance, and the viscosity of the printing ink is suitable for silkscreen printing. The printing ink does not need increase in the usage amounts of components like carbon black, prevents unfavorable influence of the components on the appearance and light shading performance of a product, and can meet light shading requirements of the product after only one printing and under the condition of a thickness of 7 to 8 micrometers, so unexpected technical effects are obtained.

Novel catalyst systems in cationically curable compositions provide colorless cationically cured compositions with improved degree of cure and thermal stability. The curable composition comprises at least one cationically curable monomer and a curing agent comprising Photocurative A or Photocurative B. Photocurative A comprises an effective amount of an accelerating photochemically active salt comprising a photochemically active cation and an accelerating anion, and an effective amount of an inhibiting non-photochemically active salt comprising a non-photochemically active cation and an inhibiting anion. Photocurative B comprises an effective amount of an inhibiting photochemically active salt comprising a photochemically active cation and an inhibiting anion, and an effective amount of an accelerating non-photochemically active salt comprising a non-photochemically active cation and an accelerating anion. The inhibiting and accelerating salts in photocuratives A and B are defined by photo differential scanning calorimetry (pDSC) and thermal differential scanning calorimetry (tDSC). The compositions are useful, for example, as optically colorless or low color coatings, adhesives, encapsulants, and sealants for optical and electronic applications.

The invention discloses a penetrating type liquid hardening agent and a preparation method thereof. The penetrating type liquid hardening agent comprises the following components in percentage by weight: 30 to 70 percent of water, 0.5 to 2.0 percent of complexing components, 0.4 to 1.0 percent of a promoting component, 20 to 60 percent of a lithium silicate solution, 2 to 8 percent of a penetration-resistant agent and 0.02 to 0.1 percent of a surfactant. According to the penetrating type liquid hardening agent, the gelatinization time of the hardening agent is prolonged by adopting an ionic complex method, so that the hardening agent can penetrate deeply into the surface of concrete and generate more thorough reaction with calcium ions. The penetrating type liquid hardening agent is a strongly alkaline solution and can greatly reduce the water absorption amount of the surface after being brushed on the surface of the concrete, thus enhancing the wear resistance of the surface of the concrete. The penetrating type liquid hardening agent does not contain VOC, belongs to an environment-friendly product and can be used for enhancing indoor and outdoor concrete surfaces.

The invention belongs to the technical field of mine conveying pipe bodies, and discloses an anti-static flame-retardant steel skeleton fiber reinforced resin pipe and a preparation technology of the anti-static flame-retardant steel skeleton fiber reinforced resin pipe. The anti-static flame-retardant steel skeleton fiber reinforced resin pipe is technically characterized in that the anti-static flame-retardant steel skeleton fiber reinforced resin pipe comprises a pipe body which comprises a seepage-proof flame-retardant conductive inner lining layer and a pressure-bearing flame-retardant conductive structural layer from inside to outside, wherein the seepage-proof flame-retardant conductive inner lining layer comprises glass fiber solidified on an inner base body, and the pressure-bearing flame-retardant conductive structural layer comprises an outer base body which is synchronously provided with a zinc-coated steel wire and glass fiber direct roving in a winding mode, wherein epoxy resin is coated on the outer surface of the zinc-coated steel wire. According to the anti-static flame-retardant steel skeleton fiber reinforced resin pipe, matching among all layers of fiber is reasonable, mechanical property is strengthened, meanwhile, weight of the tube body is lightened, multi-wall carbon nanotubes and nanometer aluminium hydroxide are filled, fine structures of all layers are changed, meanwhile, bending resistant strength and shock resistance capability are enhanced, wear-resisting property and conductivity are largely improved, service life is prolonged, and cost is reduced.

An antireflective film comprising: a support; and at least one layer including an antireflective layer, wherein at least one of said at least one layer laminated on the support is a layer formed by ionizing radiation curing of a composition containing a combination of a radical polymerization initiator with at least one compound selected from two or more kinds of initiator assistants and further containing an ionizing radiation curable compound.

The invention discloses heat-resistant flame-retardant powder coating. The coating comprises the following raw materials: epoxy resin, carboxyl-terminated unsaturated polyester resin, nitrogen-containing phenolic resin, polyamide resin, thermoplastic styrene-butadiene rubber, ammonium polyphosphate, pentaerythritol, melamine, expansible graphite, nano-zirconia, titanium dioxide, talcum powder, diphenyl silanediol, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, octadecendioic acid, tetrahydro-1,3,4,6-tetrakis(methoxymethyl)imidazo[4,5-d]imidazole-2,5(1H,3H)-dione, benzoyl peroxide and auxiliaries. The heat-resistant flame-retardant powder coating has good heat resistance and excellent flame retardant performance, can be used for coating surfaces of kitchen ware, instrument shells, display stands, electromechanical equipment, automobile components and parts and the like, and has the advantages of good comprehensive performance and long service life.

The invention discloses a resin matrix applicable to microwave curing and a preparation method of the resin matrix, and belongs to the field of preparation of composite materials. Polar mulfunctional high-performance epoxy resin is used as main body resin; an active diluent is added to adjust the viscosity of a resin system so as to enable the resin to adapt to liquid forming processes such as winding; a novel compound curing agent is selected to adjust the curing activity of the resin matrix, and nanofiller is added to improve the microwave responsiveness of the resin matrix and realize the mechanical property, the heat resistance and the size stability of the resin matrix; by the adjustment of the structures and the proportions of components such as the main body resin, the curing agent, the diluent and the nanofiller, the resin system which is proper in microwave responsiveness and curing activity, excellent in comprehensive mechanical property, high in heat resistance, high in size stability and low in viscosity and is applicable to microwave curing is developed, has a great guidance significance for preparation of a fiber composite material, and can be widely applied to the field of aerospaces and the like.

The invention relates to a preparation method of a formaldehyde-free soybean meal-based wood adhesive for artificial boards, and belongs to the technical field of adhesives. According to the invention, renewable resources, namely soybean meal, are used as raw materials, a water phase is selected as a solvent, and a process step of an alkali-acid two-step method is adopted. Epoxy resin, dicyandiamide, low-molecular-weight polyamide and soybean protein are combined for modification, a chemical reaction is carried out at the same time, and therefore the formaldehyde-free soybean meal-based wood adhesive with very high water resistance and bonding strength is prepared; the adhesive has the advantages of no formaldehyde, low viscosity, good cold pressing performance, low cost, high adhesive strength and the like; the adhesive does not volatilize formaldehyde, phenol or other harmful substances, has the characteristic of no formaldehyde, and is safe and environment-friendly, and the preparedsoybean meal-based wood adhesive is low in viscosity, convenient for applying, good in coating and pre-pressing performance, easy to spray and apply, convenient for repairing of plywood and capable of preventing a shaving board from being scattered, and the problems that a soybean adhesive is high in viscosity and difficult to spray are solved.

The invention relates to a preparation method of a multilayer composite film for a backlight module set. The method includes the following steps that: (1) the base material of the multilayer composite film for the backlight module set is prepared; (2) a second prism film is prepared; and (3) a first prism is prepared. The preparation method of the invention is simple and efficient. With the preparation method of the invention adopted, the separate preparation of a diffusion film and prism films is avoided, and complicated steps such as winding, unwinding and cutting can be also avoided; production procedures are decreased; UV energy consumption is reduced; production costs are reduced; and production capacity is improved.

The invention relates to a friction material without an asbestos layer and a manufacturing method thereof. The friction material without the asbestos layer consists of an adhesive, reinforcing fibers and a friction performance regulating agent. The reinforcing fibers comprise glass fibers, aramid fibers, copper wires and friction spinning yarns. The manufacturing method of the friction material without the asbestos layer comprises the steps: acquiring the friction spinning yarns; twisting together for two times to obtain twisted threads; weaving the twisted threads to form a piece of mesh cloth; dipping the mesh cloth with the adhesive, and baking; clipping; carrying out press vulcanization after overlapping; and grinding the surface to obtain the finished product. The production cost of the friction material without the asbestos layer is low, the base material has better overall associativity, the metal wire distribution is more uniform, and the heat conductivity and the heat dissipation of the friction material are faster and better. The precision of the manufactured friction element size is higher than that of a friction element manufactured by a conventional method. Phenomena of blistering, swelling, stratifying and warping that often appear during the production of laminated products are completely avoided. The manufactured finished product has higher curing degree and more stable friction coefficient.