41results about How to "Meet the requirements of ecological environment protection" patented technology

The invention relates to a phosphorus-containing flame-retardant epoxy resin having undergone hydrophobic modification by silane, and a preparation method thereof, belonging to the field of preparation of high-performance high polymer materials. The preparation method comprises the following steps: adding 20 to 40 g of DOPO-VTS, 100 to 150 g of DOPO type epoxy resin, 0.8 to 1.6 g of dibutyltin dilaurate (DBTL) and 0.5 to 4 g of deionized water into a 250-mL round-bottom flask equipped with a condenser tube; carrying out a reaction at 80 to 110 DEG C under stirring for 2 to 6 h; and then carrying out a vacuumized reaction for 0.5 to 2 h so as to obtain the yellow gummy phosphorus-containing flame-retardant epoxy resin (DV-m-DE) having undergone hydrophobic modification by silane. The epoxy resin prepared in the invention has excellent hydrophobicity and flame resistance; the vertical combustion grade of the epoxy resin reaches V-0 grade; the surface contact angle of the epoxy resin is increased to 92.7 to 106.3 DEG; and the epoxy resin has the characteristics of excellent compatibility, nontoxicity and environment friendliness, can be applied to outdoor or wet severe environments and has wide application prospects.

The invention provides a method for preparing an insecticidal activity substance from secondary metabolism products of long shoot trichoderma strains. The method comprises the following steps of: step 1: performing liquid fermentation on the long shoot trichoderma strains capable of producing the insecticidal activity substance so as to obtain a culture solution containing insecticidal activity metabolism products; and step 2: performing a crude extraction operation on the obtained culture solution containing the insecticidal activity metabolism products so as to obtain a crude extract of the insecticidal activity substance. The invention further provides the application of the insecticidal activity substance prepared by the preparation method in the respects of preventing and treating bemisia tabaci and strawberry red spiders. The insecticidal activity substance and the preparation method and the application thereof disclosed by the invention have the advantages that preventing and treating trialeurodes uaporariorum and the strawberry red spiders through the strains are safe and reliable, phytotoxicity is not produced, human health is not endangered, and environment is not polluted.

The present invention relates to floor tile, and is especially floor tile made of oil field sludge and curing agent and its production process. The floor tile has the main material comprising oil field sludge 30-60 wt%, river sand 15-40 wt%, cement 15-30 wt%, flyash 0-35 wt% and curing agent 1-8 wt%. The floor tile of the present invention has high strength and no pollution and reaches the requirement of protecting ecological environment. The present invention solves the problem of pollution caused by oil field sludge, and the floor tile producing process is simple.

The invention relates to a multi-sound-channel plastic-plate erhu. A neck comprises a phoenix-shaped neck tip stick, a tuning peg erecting stick and a tubular stick which are sheathed together. Sound outlets which are communicated with the cavity of the tubular stick are drilled in sheathed sections of the tuning peg erecting stick and the tubular stick. A fine tuning device is installed at the sheathed sections. The lower section of the tubular stick is inserted into a sound box. A rectangular hole is arranged in the section of the tubular stick in the sound box. Air which is excited to vibrate in the sound box can enters the cavity of the tubular stick from the rectangular hole. Generated resonant sounds come out from the sound outlets in the tubular stick. The skin of the sound box is a thin plastic plate. Pairs of small holes are symmetrically arranged in the circumference of the thin plastic plate and are used as sound outlets. A spring is fixedly arranged at the central part of the internal surface of the thin plastic plate. A thin plastic disc is connected onto the moving end of the spring. By taking a vibration balance position of the thin plastic disc as a starting point, a front resonant box of the sound box is formed between the vibration balance position and the thin plastic plate, and a rear resonant box of the sound box is formed between the vibration balance position and a sound window. Compared with the prior art, the texture of the skin is even, the skin is easy to install, the probability of generating impure sounds is small, the skin is not influenced by climate and temperature, multiple sound channels can be formed and a fine-sounding effect is taken during playing.

The invention discloses epoxy silicone oil modified phosphorus-containing flame-retardant epoxy resin and a preparation method thereof, belonging to the preparation field of high-performance high-polymer materials. According to the preparation method, epoxy silicone oil is taken as a water repellent agent, KH550 is taken as a compatilizer, and the epoxy silicone oil, KH550 and DOPO-type phosphorus-containing flame-retardant epoxy resin are connected together through chemical bonding by virtue of a vacuum stirring manner and are cured so as to prepare the epoxy silicone oil modified phosphorus-containing flame-retardant epoxy resin. The obtained epoxy silicone oil modified phosphorus-containing flame-retardant epoxy resin has excellent compatibility, hydrophobicity, flame retardance and mechanical properties, the vertical burning grade reaches the V-0 level, a surface contact angle is increased to 95.1-99.3 degrees, the tensile strength is 41.5-55.5MPa, and the impact strength is 2.7-14.6kJ / m<2>; and meanwhile, the epoxy resin has the characteristics of no toxicity and environmental friendliness, can be applied to outdoor or moist severe environments, and has wide application prospects.

The invention relates to the field of textile auxiliary agent, especially relates to a method for preparing a low temperature crosslinking resin for textiles. The method is carried out according to the following steps: mixing raw materials, stirring and controlling temperature, adding a monomer mixture, adding a monomer mixture and discharging. The method has high environmental performance, and can effectively save energy and achieve energy saving and environmental protection.