4results about How to "Improve transparency" patented technology

The invention belongs to the technical field of contact lenses, and provides a high-oxygen-permeability silica hydrogel and a silica hydrogel contact lens. The product is prepared from the following raw materials in parts by mass: 20 to 90 parts of organic silicon monomer, 20 to 80 parts of hydrophilic monomer, 0.1 to 5 parts of cross-linking agent, 0.2 to 7 parts of initiator and 20 to 50 parts of solvent. Symmetrical monomethacryloyloxy propyl modified polydimethylsiloxane, methyl-di (trimethylsiloxy)-silyl propyl glyceryl methacrylate and 2-(trimethylsiloxy) ethyl methacrylate are selected as organic silicon monomers together, and the three organic silicon monomers cooperate with one another, so that the viscosity of the organic silicon resin is improved; the oxygen permeability of the lens is improved; and the three organic silicon monomers and the hydrophilic monomer have good solubility. In addition, the sample is soaked in an isopropanol solution, so that the transparency of the lens is improved, and meanwhile, a channel on the lens is opened, so that the oxygen permeation coefficient of the lens is improved.

The invention discloses a high-hardness anti-fog UV (ultraviolet) curing protective film and a preparation process, and belongs to the technical field of inorganic nano materials, the high-hardness anti-fog UV curing protective film comprises a base material layer and a high-hardness anti-fog UV curing layer arranged on the upper end surface, and is characterized in that the high-hardness anti-fog UV curing layer comprises the following components in parts by weight: 30-50 parts of organic resin oligomer, 10-20 parts of organic solvent, 10-20 parts of solvent, 1-5 parts of antioxidant, 1-5 parts of coupling agent and 1-5 parts of coupling agent. 10-30 parts of inorganic nanoparticles, 5-15 parts of an anti-fogging agent, 1-5 parts of a photoinitiator, 10-20 parts of a reactive diluent, 0.1-2 parts of a leveling agent, 0.1-2 parts of a defoaming agent and 0.1-1 part of a stabilizer, and the coating has the beneficial effects that the inorganic nanoparticles are uniformly introduced into a single-layer coating, so that the hardness and scratch resistance of the coating are remarkably improved; the hardness of the coating can reach 3H-5H, the scratch resistance is excellent, no obvious scratches exist on the surface, and the problem that a traditional single-layer protective film is difficult to give consideration to both high hardness and flexibility is effectively solved.

The utility model discloses a novel anti -static VCM structure, including base, the inner wall of base is fixed with the locating block, the locating block is provided with four groups and is held and arranges, the inside slide of base is equipped with the front leaf spring, the upper end surface of front leaf spring and the fixed magnet on four corners, the middle position of front leaf spring is equipped with the carrier, the outer end of carrier is equipped with the coil, the upper end of carrier is equipped with the rear leaf spring, rear leaf spring and locating block slide installation, the recess is all set up on locating block, the inside of recess all is equipped with fixed axle, the fixed axle all is equipped with the pressure block that rotates, thereby, the user can install the front leaf spring, carrier and rear leaf spring in the base through the locating block, then rotates the pressure block to make its bottom and the upper end surface of rear leaf spring abut, then tightens the fixed effect of pressure block to carry out the fixed effect of pressure block to carry out the fixed effect of pressure block to carry out the fixed effect of pressure block to carry out the fixed effect of pressure block to carry out the fixed effect of pressure block to carry out the fixed effect of pressure block to carry out the fixed effect of pressure block to make the variety of spare parts in the structure convenient to fixed installation.

The invention belongs to the field of isocyanate, and particularly relates to blocked polyisocyanate as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, adding polyisocyanate and other sealant components in the sealant composition into a reaction device, then respectively and continuously mixing a malonic acid diester compound and a basic catalyst in the sealant composition through a mixing device, and continuously adding the mixture into a reaction system; after the reaction is finished, the blocked polyisocyanate is obtained; the sealing agent composition is prepared from a malonic acid diester compound and other sealing agent components. The enclosed polyisocyanate prepared by the invention has the advantage of high transparency, and can improve the appearance of a paint film when being applied to downstream paint.