35results about How to "Good temperature and weather resistance" patented technology

The invention belongs to the technical field of paint, and particularly relates to modified polyester powder paint and a preparation method thereof. The modified polyester powder paint is prepared from the following ingredients in parts by weight: 55 to 65 parts of polyester resin, 4 to 8 parts of curing agents, 0.5 to 2 parts of leveling agents, 0.5 to 2 parts of benzoin, 2 to 5 parts of polydopamine and 30 to 40 parts of filling materials through viscose preparation, polyester resin melting, electrostatic cospinning, extrusion molding granulation and crushing sieving. Bubbles, shrinkage holes and particles on the coating can be effectively reduced; good film forming performance, weather resistant performance, luster degree and adhesion power are realized.

The invention discloses a normal temperature-curable composite coating based on modified 107 silicone rubber and a preparation method thereof. The coating comprises the following raw materials by weight: 35-50% of 107 silicone rubber, 15-20% of xylene, 2-10% of gama-methacryloxy propyl trimethoxyl silane, 5-25% of tetraethoxysilane, 5-10% of styrene, 5-10% of methyl methacrylate, 1-5% of fumed silica, 0.4-5% of azobisisobutyronitrile, and 0.05-0.1% of dibutyltin dilaurate. The preparation method comprises the following steps: firstly performing graft polymerization of acrylic resin with chain segments of 107 silicone rubber, then adding fumed silica and tetraethoxysilane into the system, and curing the composite coating to form a film under the action of a catalyst of dibutyltin dilaurate. The composite coating of the invention can be cured to form a film at normal temperature, and is suitable for protection and decoration of different metal substrates.

The invention relates to a mold release agent for a masking tape, and a preparation method of the mold release agent. The mold release agent is prepared from the following raw materials in parts by weight: 150-270 parts of ethyl acrylate, 0-90 parts of butyl acrylate, 0-110 parts of methyl methacrylate, 0-105 parts of styrene, 5-10 parts of succinic acid, 0-7 parts of crosslinking monomer, 500-600 parts of deionized water, 0.1-0.4 part of sodium bicarbonate, 3-5 parts of lauryl sodium sulfate, 1.2-3.0 parts of ammonium persulfate, 0.5-2 parts of a defoaming agent, 30-55 parts of zinc glycinate, 5-15 parts of ammonia water, 20-100 parts of long-chain alkyl surface active agent and 0-10 parts of modified polysiloxane. The mold release agent is a water-based mold release agent, is convenient to use and can be directly coated or can be coated after being diluted by water; a catalyst is not fed into the mold release agent, and the mold release agent is capable of crosslinking at low temperature and does not contain an organic solvent, so that the mold release agent is free from environmental pollution and harmless to the human health; furthermore, the mold release agent has good heat resistance and weather resistance, is capable of providing proper mold release force for the masking tape, and is lower in migration rate; the tape prepared by the mold release agent is free from residual glue after being used, so that the protected surface is not polluted.

The invention relates to a photothermal power generation composite material backplane and a preparation method thereof. The composite material backplane includes a backplane and a reflective mirror surface laid on the backplane, and the backplane is provided with a reinforcement integrally formed with it. Ribs and a plurality of connecting discs, the connecting discs are tightly connected with the reinforcing ribs, and the back plate and the connecting discs are both made of epoxy resin. Firstly, the connecting discs are prepared in the mold, and then on the back In the plate mold, the reinforcement layer auxiliary materials, reinforcement ribs, connecting discs and vacuum auxiliary materials are laid according to the requirements, epoxy resin is vacuum poured, and after cooling and forming, a back plate integrally formed with the reinforcing ribs and connecting discs is obtained, and then in the The reflective glass is glued on the back plate to obtain a composite material back plate. Compared with the prior art, the composite material backboard prepared by the invention has uniform structure, high strength, low cost, long service life, simple preparation process and convenient installation of the backboard.