52results about How to "Control curing time" patented technology

The invention discloses a high-transparency and high-strength room temperature vulcanization organosilicon electron pouring sealant, which comprises two components of A and B, wherein the component A comprises: hydroxyl terminated polydimethylsiloxane, simethicone and synthetized strengthening agent, and the weight ratio thereof is 100:20-60:10-40; the component B comprises vulcanizer and catalyst, the weight ratio thereof is 4-20:0.8-2.4; and the weight ratio of the component A to the component B is 1-9:9-1. The invention ensures that the room temperature vulcanization pouring sealant forms a super large three-dimensional skeleton structure after the vulcanization by adopting the synthetized strengthening agent, effectively improves the mechanical property and optical property of the pouring sealant; at the same time the preparation method of the pouring sealant is simple, is suitable for the industry production, saves energy consumption and reduces the cost.

The invention relates to a gel injection molding technology of a large-sized and complicated-shape silicon carbide ceramic biscuit, belonging to the technical field of a material preparation. In the technology, the large-sized and complicated-shape SiC ceramic biscuit can be prepared by seven steps of preparing premixing liquid, preparing slurry, defoaming the slurry, adding an initiating agent and a catalyst, injecting and molding, drying a biscuit body and degreasing the biscuit. The invention can ensure that a plurality of technological difficulties of difficult preparation of high-solid-phase content slurry, difficult gelation time control of the slurry, difficult demolding and drying and the like in the course of preparing the large-sized and complicated-shape SiC ceramic biscuit by adopting the gel injection molding technology are solved; and the preparation of the complicated-shape SiC ceramic biscuit of 1m of magnitude order is realized.

The invention discloses an abietic resin allyl propionate photo-curing material, which comprises the following components in parts by mass: 1 part of abietic resin allyl propionate, 0.01 to 0.1 part of conventional photoinitiator, 5 to 100 parts of diluent or active diluent, wherein the abietic resin propionate uses colophony as a structure unit and contains vinyl double bonds. When the material is matched with monomer for conventional photo-curing, dosage of the monomer for conventional photo-curing is between 0 and 99 parts, and is not equal to zero. When the abietic resin allyl propionate is applied in photo-curing material prepolymer, the curing time and the surface effect can be controlled by regulating the photo-curing condition. The prepolymer has the characteristic of high curing speed, and the obtained film has good flexibility, impact strength resistance and adhesion, and has high hardness, acid resistance, alkali resistance, salt resistance and water resistance.

The invention provides a preparation method for porous silicon nitride ceramic. The preparation method comprises the following steps: preparation of gel; addition of a pore forming agent; molding of a green body; drying of the green body; sintering of the green body; etc. The method combines a gel-casting and a pore forming agent addition process together and has the advantages of simple process, low cost and substantially shortened gel discharge time; and the prepared porous silicon nitride ceramic has great porosity, high bending strength and good mechanical properties.

The invention discloses shadowless glue with high adhesion and a preparation method thereof. The shadowless glue comprises the following components in parts by mass: 10-35 parts of polyurethane modified acrylic resin, 20-45 parts of unsaturated polyester resin, 35-60 parts of a diluent and 2-10 parts of a photosensitizer. Since polyurethane modified acrylic resin and unsaturated polyester resin are blended, such advantages of polyurethane modified acrylic resin as high adhesion and good flexibility and such advantages of unsaturated polyester resin as room-temperature curing and normal-pressure molding properties as well as good processing property are combined; therefore, after being cured, the shadowless glue has excellent adhesion and can be operated under simple and convenient conditions.

The two-component liquid joint glue for normal temperature prepared by the present invention is polyurethane two-component A and B type liquid joint glue, wherein the A component is composed of diphenylmethane diisocyanate (MDI), polyether polyol, chlorine Prepolymer obtained by chemical synthesis of various materials such as paraffin wax and dioctyl phthalate; component B is asphalt, polyether polyol, chlorinated paraffin, polyisobutylene, crosslinking agent, coupling agent, catalyst , Drying agent, light calcium powder and other materials. When using, fully mix A and B components according to a certain proportion, and pour directly into the cracks of the road surface to obtain a road surface pouring with high cohesive force, high adhesion, high wear resistance, high weather resistance and fast curing. Seam, seam material. It can be used for various types of cracks in asphalt and cement pavement.

The invention relates to a polymer supported coagulant, a preparation method thereof and cement paste containing the polymer supported coagulant in the field of petroleum drilling and production. Thepolymer supported coagulant is prepared from a polymer supported organic component and inorganic matter in the weight ratio being 1:(0.1-100), preferably 1:(0.5-10). The polymer supported coagulant can be used as a cement coagulant for oil well cementation, particularly in a low-temperature environment. The polymer supported coagulant has good adaptability in the temperature range of 5-10 DEG C, has good dosage linearity, is compatible with multiple additive systems, has good compatibility, has the compressive strength larger than 3.5 MPa within 24 h for set cement and has no effects on comprehensive performance of the cement paste.

The invention provides a device and method for promoting curing of a fiberglass product. The device for promoting curing of the fiberglass product comprises a constant-temperature water tank and a circulation device. A water outlet of the constant-temperature water tank is connected with a water inlet of the circulation device. The device for promoting curing of the fiberglass product further comprises a supporting device, a curing box and a rotating device. The rotating device is fixedly arranged at the bottom of a die frame and used for driving a drive shaft to rotate. The curing box comprises a box body, an opening and closing door arranged on one side of the box body and supporting feet arranged at the bottom of the box body. A box plate of the box body is of a double-layer structure, and a cavity is formed between an inner-layer plate body and an outer-layer plate body. The outer-layer plate body is fixedly provided with a water inlet pipe and a water outlet pipe which communicate with the cavity, wherein the water inlet pipe is connected with a water outlet of the circulation device, and the water outlet pipe is connected with a water inlet of the constant-temperature water tank. A channel for the drive shaft to get in and get out is formed in a bottom plate. The device for promoting curing of the fiberglass product has the beneficial effects that the structure is simple, the investment is small, heating is uniform, maintenance is convenient, and the heat energy utilization rate is high.

The invention relates to a bridge expansion joint protective pouring system which is a mixture of a component A, a component B and a component C. The component A comprises, by mass, 30-60 parts of a polyurethane prepolymer, 5-10 parts of a plasticizer, 1-5 parts of a catalyst, 1-5 parts of a defoaming agent, 0.5-2 parts of a water removal agent and 7-20 parts of filler. The component B comprises 10-20 parts by mass of epoxy resin, 1-8 parts by mass of a diluent and 1-3 parts by mass of a thixotropic agent; the component C comprises 1-5 parts by mass of a high-activity curing agent; 1-5 parts by mass of a medium-activity curing agent; and 0.5-2 parts by mass of a coupling agent. After the component B and the component C are mixed, epoxy groups can react with amino groups for curing; the epoxy resin and the metal have excellent bonding performance, so that the component B and the component C can be firmly bonded with a steel structure of the expansion joint after being cured.

The present invention relates to the technical field of coatings, in particular to the technical field of water-based coatings, and specifically discloses a low-VOC moisture-heat-resistant zinc-containing water-based paint for engineering machinery. By selecting two water-based epoxy resins with different epoxy values ​​and different reaction speeds and two Mixing water-based epoxy curing agents with different active hydrogen equivalents, and adding flaky zinc powder and shielding fillers, the prepared water-based paint is a zinc-rich primer, which has good ease of construction and good adhesion of the paint film. It has excellent physical and chemical properties, low VOC content, safety and environmental protection, can be used without intermediate coating, and reduces the construction process of construction machinery coating.

The invention relates to a highway environment-friendly epoxy biological asphalt material and a preparation method thereof, in particular to an epoxy biological asphalt material to repair a pavement and a preparation method thereof in order to solve the problem that existing biological asphalt materials have difficulty in balancing high- and low-temperature properties. The highway environment-friendly epoxy biological asphalt material is made from, by weight, 100 parts of biological asphalt, 35-60 parts of a curing agent, 1-2 parts of a strong base, 0.5-1 part of a defoaming agent, and 20-34 parts of epoxy resin. The preparation method includes: I, mixing the biological asphalt, the curing agent, the strong base and the defoaming agent to obtain biological asphalt mixture; II, mixing the epoxy resin with the biological asphalt mixture. The combination of the biological asphalt with the epoxy resin herein can balance the high- and low-temperature properties; the cured cross-linked epoxyresin is used to improve the high-temperature performance; the biological asphalt is used to fill the epoxy resin to provide toughening and to improve low-temperature performance; the curing time ofthe combination is well controlled, so that quick pavement repairing is achieved.