48results about How to "Raw materials are environmentally friendly" patented technology

The invention belongs to the technical field of heat insulation materials, and discloses a preparation method of an alumina-silica airgel heat insulation composite material. The preparation method of the invention adopts alumina and silica sol with water as a solvent, and inorganic ceramic fibers as Reinforcement phase, through six simple process steps of preparing fiber prefabricated parts, preparing alumina-silica sol, vacuum impregnation, gel aging, hydrothermal assisted drying, and drying, a high-temperature resistant, low thermal conductivity, high-strength oxidation Aluminum-silica airgel thermal insulation composites. The preparation method of the material adopts raw materials without organic aluminum / inorganic aluminum / organosilicon compounds. During the preparation process, there is no organic solvent replacement and no flammable and explosive ethanol solvent is used as a drying medium. The raw materials and preparation process are green, environmentally friendly and safe. The manufacturing cost is low, and it is easy for mass production and large-scale application.

The invention discloses a crusting agent, a preparation method and application thereof. The crusting agent adopts modified cellulose, modified starch, surfactant, polyacrylamide and glycerin, and rationally configures the ratio of each raw material. After testing, the crusting agent is mixed with water and sprayed on coal After the water penetrates and volatilizes, it forms a protective layer on the surface of the coal powder to prevent the dust from being raised by the coal powder, and its dust suppression efficiency is greater than 90%. At the same time, the encrusting agent has good moisturizing performance, a moisture absorption rate of more than 15%, environmentally friendly raw materials, and a biodegradability of more than 99%.

The invention discloses a method for preparing organosilicone hybrid resin and a power type encapsulating material for light-emitting diodes (LED) thereof and application. According to the method, the organosilicone hybrid resin containing three functional groups of an epoxy group, a fluorin group and a phenyl group is prepared by a cohydrolysis condensation method, and the content of each group in the resin is optimized by controlling the ratios of fluoro alkyl silicane, epoxy alkyl silicane and phenyl silicane, so that the resin is applied to the power type encapsulating material for the LEDs. The prepared encapsulating material has the advantages of epoxy resin and organosilicone, has high performance of high light transmittance and refractive index, low hygroscopicity, high mechanical property and ageing-resistant performance and the like, and the problems of low light output rate, short service life and the like of the LEDs due to dropping caused by low bonding strength and poor mechanical property of the ordinary organosilicone material for encapsulating LEDs are solved. The method for preparing the organosilicone hybrid resin and the power type encapsulating material for the LEDs is simple, and raw materials are readily available and environment-friendly; and the organosilicone hybrid resin can also be used as the raw materials to be applied to processing and preparation of optical lens materials, photovoltaic conversion materials, integrated circuit encapsulating materials, insulating materials, coating materials, adhesives and the like.