48results about How to "Meet friendly request" patented technology

The invention discloses a conformal coating for protecting a printed circuit board, a preparation method and a curing method thereof, belonging to the field of printed circuit board protection materials. The conformal coating comprises the following components in percentage by weight: 31-63 percent of polyurethane-acrylic ester resin, 30-60 percent of active diluent, 4-8 percent of photoinitiator and o.55-1.55 percent of auxiliary agent. The conformal coating contains no solvent, cannot cause pollution due to solvent volatilization and is environmentally-friendly. Moreover, after the conformal coating is irradiated and quickly cured through ultraviolet light, the conformal coating can be continuously subjected to moisture curing, thus the optimal property of the conformal coating can be ensured even if the conformal coating is in a place with a shadow.

The invention relates to a preparation method and applications of an aqueous reflective radiation type composite heat insulation paint. The aqueous reflective radiation type composite heat insulationpaint is of a double layer paint layer structure composed of a radiation thermal-insulation paint and a reflective thermal-insulation paint; the radiation thermal-insulation paint is sprayed onto a lower layer; the reflective thermal-insulation paint is sprayed onto an upper layer; the high radiation performance of convenience carbon nanotube and the reflective performance of rutile type titaniumdioxide are combined, reflective thermal insulation effect is achieved by the titanium dioxide at the upper layer; the radiation thermal insulation effect is achieved by the carbon nanotube at the bottom layer. Compared with simple blended single-layer structures, the double-layer structure possesses a following advantage: the reflective effect of rutile type titanium dioxide can be ensured effectively. The aqueous reflective radiation type composite heat insulation paint is low in VOC, is friendly to the environment. The aqueous reflective radiation type composite heat insulation paint possesses excellent reflective performance on visible light and near infrared light, is high in hemispherical emissivity, and excellent in thermal insulation effect, is green, and is friendly to the environment; the preparation method is simple and controllable; construction is convenient; and the aqueous reflective radiation type composite heat insulation paint can be applied on building exterior wallsand petroleum chemical storage tanks based on different requirements.

The invention provides graphene waterborne super-wear-resisting floor paint and a preparation method thereof. The floor paint is prepared from the following components in parts by weight: 60 to 75 parts of polyurethane resin, 8 to 11 parts of modified graphene, 7 to 11 parts of hydroxyethyl cellulose, 15 to 20 parts of dimethylaminoethyl acrylate, 5 to 9 parts of nano zinc oxide, 9 to 17 parts ofnano silicon dioxide, 15 to 26 parts of curing agent, 0.5 to 1.5 part of dispersant, 0.9 to 1.8 parts of flatting agent, 0.4 to 0.8 part of de-foaming agent, 3 to 5 parts of active diluting agent, 30to 60 parts of pigment and filler and 15 to 30 parts of water. According to the graphene waterborne super-wear-resisting floor paint provided by the invention, the wear-resisting performance and mechanical performance of a coating paint film are enhanced; a preparation technology is simple and a prepared product meets the environment-friendly requirements; the graphene waterborne super-wear-resisting floor paint is safe and environmentally friendly and has a wide applicable range.

The invention discloses Bacillus subtilis capable of producing broad spectrum and efficient antibacterial peptide and an application of the Bacillus subtilis and belongs to the technical field of microorganisms, wherein the Bacillus subtilis is Bacillus subtilis BRT39 concretely with the preservation number of CGMCC NO. 5702. Antibacterial peptide in metabolic products of a BRT39 bacterial strain has stronger anti-bacterial effect, a fermentation liquor can inhibit gram positive bacteria and also has stronger inhibiting effect on multiple gram negative bacteria and fungi, and the antibacterial peptide in the fermentation liquor has strong acid-base stability, good thermal stability, strong light stability and high organic solvent tolerance. The antibacterial peptide produced by the BRT39 bacterial strain belongs to a natural antibacterial agent, has no side or toxic effect, can be used as a food preservative, a feed additive, an agricultural biological control agent and an animal disease prevention agent and has the advantages of no toxicity, no residue, no drug resistance and high safety.