8results about How to "Good anti-cracking effect" patented technology

The invention discloses a radiation refrigeration coating and a preparation method thereof. The radiation refrigeration coating comprises a first filler and a second filler, the mass ratio of the first filler to the second filler is (1-3): (1-5), and the first filler comprises the following components in percentage by weight: 50-70% of a polyurethane emulsion, 10-15% of a silane coupling agent, 8-10% of multi-mesoporous nano-silica and 5-8% of talcum powder; the second filler comprises the following components in percentage by weight: 60%-70% of polyethylene glycol, 10%-15% of a dispersing agent and 5%-8% of nano barium oxide; 5%-8% of tannic acid; 3%-5% of nano silver; the viscosity of the polyurethane emulsion ranges from 300 cps to 800 cps. The radiation refrigeration coating disclosed by the invention has the advantages that a refrigeration film has larger infrared radiation refrigeration capacity in an atmospheric window, better ultraviolet light absorption capacity and long service life.

The invention discloses quick-hardening cement mortar and an application method thereof, and relates to the technical field of building materials, the quick-hardening cement mortar is composed of the following components: quick-hardening sulphoaluminate cement, common Portland cement, aggregate, an additive and a fiber composition; the fiber composition comprises galvanized steel fibers and polymer fibers, and the polymer fibers comprise PVA fibers; a film layer modified by a silane coupling agent is formed on the surfaces of the galvanized steel fiber and the polymer fiber, and the silane coupling agent is selected from at least one of aminopropyltriethoxysilane and diamino type functional group silane. The galvanized steel fibers and the polymer fibers are adopted in the cement mortar, the polymer fibers generate pressure stress in a cement block by utilizing an environment that the cement is severely hydrated in a short time, and the polymer fibers and the galvanized steel fibers generate a synergistic effect, so that the overall anti-dry-crack effect of the cement block is achieved; through a silane coupling agent surface modification scheme, the anti-cracking effect is enhanced, and the effect of common long fibers is achieved through short fibers.

The invention discloses a cooling anti-radiation coating and a preparation method thereof. The cooling anti-radiation coating comprises a surface coating, a middle coating and a bottom coating, the surface coating comprises the following components in percentage by weight: 40-60% of polyethylene, 1-5% of carbon nanotubes, 1-5% of graphene oxide, 10-15% of a dispersant, 5-8% of polyethylene glycol, 3-8% of nano barium oxide and 3-10% of nano boron nitride. The intermediate coating comprises the following components in percentage by weight: 50%-70% of polyurethane, 20%-30% of a silane coupling agent and 5%-10% of aluminum oxide; the bottom coating comprises the following components in percentage by weight: 70%-80% of resin, 7%-9% of talcum powder, 2%-4% of aluminum oxide and 3%-10% of hydroxyethyl cellulose. The cooling anti-radiation coating formed by the synergistic cooperation of the components has high electromagnetic shielding performance and long service life.

The invention provides an application of a sustained-release film coating premix in preparation of methylphenidate hydrochloride tablets. The provided slow-release film coating premix is prepared from the following components in parts by weight: 35-55 parts of a film forming material, 18-32 parts of a plasticizer, 14-22 parts of a coloring agent, 1-4 parts of a dispersing agent, 5-15 parts of an anti-sticking agent and 40-60 parts of a solvent, and the film forming material is prepared from hydroxypropyl methylcellulose, polyvinyl alcohol and povidone K30; the plasticizer comprises polyethylene glycol 6000 and propylene glycol; the solvent is water. The sustained-release film-coated premix is used for preparing the methylphenidate hydrochloride sustained-release tablet, the release speed of the medicine can be controlled, and the stability, safety and effectiveness of the medicine are improved.

The utility model discloses a double-T-shaped concrete prefabricated part which comprises a prefabricated assembly, a locking assembly is arranged on the inner wall of the prefabricated assembly, and a transverse rod assembly is arranged on the inner wall of the prefabricated assembly. The prefabricated assembly comprises a prefabricated plate, a plurality of reinforcing steel bars are arranged on the inner wall of the prefabricated plate, an upper positioning groove is formed in the inner wall of the prefabricated plate, a lower positioning groove is formed in the bottom of the prefabricated plate, a matching groove is formed in the inner wall of the prefabricated plate, and a connecting hole is formed in the outer wall of the prefabricated plate; according to the concrete prefabricated part, through the arrangement of the prefabricated assembly and the arrangement of the upper positioning groove and the lower positioning groove, during installation, the better matching and limiting effects between the prefabricated plate and the installation base can be achieved, after the prefabricated assembly is installed, accurate installation is achieved, the prefabricated assembly is used in cooperation with the locking assembly, and through the positioning drill rod or the screw rod, the prefabricated plate and the installation base can be fixed. And the locking assembly is fixed on the base, so that the installation of the prefabricated assembly can be completed, the use effect of the device is improved, and convenience is provided for a user.

The utility model discloses a concrete formwork with water cooling and anti-cracking effects. The concrete formwork comprises a formwork body, a supporting rod and a box body fixed to the inner wall of the formwork body. A plurality of transverse rib plates are fixed in the box body at intervals in a staggered manner; the transverse rib plates which are fixed in a staggered manner at intervals form a snake-shaped water passing channel in the box body; a water inlet is formed in the upper portion of the box body, and a water outlet is formed in the lower portion of the box body. When the concrete is poured, cooling water with certain water temperature and pressure is injected into the box body along with the pouring of the concrete, and the cooling water flows along the snake-shaped water passing channel to take away heat generated by the hydration reaction of the concrete. According to the utility model, the problem that the cooling and anti-cracking effects are not ideal due to the fact that surface water flowing or spraying cooling cannot be carried out when the internal temperature of the lining concrete reaches the highest before the template of the traditional lining concrete is removed is solved. The device has the advantages of being timely in cooling, high in speed and remarkable in cooling and anti-cracking effect.

This invention discloses a roller-compacted concrete (RCC) for hydraulic engineering and its preparation method, belonging to the field of concrete technology. The RCC for hydraulic engineering of this invention incorporates a basalt fiber-modified micro-expansion component. The preparation method of the basalt fiber-modified micro-expansion component involves cutting basalt fibers into 6-12mm fibers, dry-mixing them uniformly with steel slag powder and magnesium oxide expanding agent, and then spraying emulsified asphalt for surface coating and granulation. This invention's RCC for hydraulic engineering avoids cracking by innovatively adding the basalt fiber-modified micro-expansion component. Simultaneously, this RCC meets the actual needs of hydraulic engineering, exhibiting high compressive strength, good crack resistance, high durability, and high reliability.

The invention discloses a base material strength attenuation resistant protective film material, a preparation process and a use process. The base material strength attenuation resistant protective film material is prepared from the following components in percentage by mass: 60 to 80 percent of dimethyl silicone rubber, 10 to 30 percent of Y-glycidyl ether oxypropyl trimethoxy silane, 1 to 5 percent of neodecanoic acid, 1 to 5 percent of abietic acid and 1 to 5 percent of triethylene diamine. By adopting the formula materials and cooperating with the preparation process and the use process, the whole production process is simple, the dependence on complex spraying equipment is not needed, the evaporation-resistant coating process is adopted in one step, the production procedure is only evaporation-resistant coating, compared with the traditional spraying, baking and cleaning process, the production period is greatly shortened, the yield is as high as 98%, and the production cost is reduced. And the production cost is obviously reduced.