48results about How to "Good air drying" patented technology

The invention discloses flame-retarding lacquer putty and a preparation method thereof, and aims to provide air-dried organic silicon-modified unsaturated flame-retarding lacquer putty which has good comprehensive performance, long-term use at the temperature of below 250 DEG C and self-drying property at normal temperature to meet special requirements of subway vehicles and casthouse vehicles, wheel shafts, smoke (steam) passages and the like in other high temperature places. The air-dried organic silicon-modified unsaturated flame-retarding lacquer putty is characterized by being prepared by mixing raw material nano-montmorillonite not containing a halogen element compound, reactive diluent, a heat-resistant unsaturated polyester resin, an organic silicon resin, a special filler, a flame retardant, a low shrinkage additive, a stabilizer, dimethylaniline, a dispersant, titanium dioxide, hollow glass micro-beads, a drier, molybdenum disulfide, talcum powder, ketone peroxide, a curing agent filler, quinacridone bluish red and polyvinylpyrrolidone in a certain proportion, dispersing and grinding the mixture to prepare a main agent and a curing agent, and mixing the main agent with the curing agent. The flame-retarding lacquer putty is mainly used as a bottom coating material for subway vehicles.

The invention provides jointing glue for stone, which at least comprises the following components in parts by weight: 100 parts of an air-dried unsaturated polyester resin, 1-5 parts of hydrogenated castor oil, 0-60 parts of micron-sized silica and 1-15 parts of an antishrinking agent. The jointing glue overcomes the defects of taking the existing common marble glue as the jointing glue such as poor air-drying properties, poor antishrinking capability, poor permeability and the like. The jointing glue for stone has the advantages of good permeability, no tackiness after curing, strong antishrinking capability, glue brightness after polishing and the like. The jointing glue enriches varieties of the marble glue and solves the problem of jointing difficulty among the stone.

The invention relates to a synthesis process of air-drying epoxy vinyl ester resin, which consists of bisphenol A type epoxy resin with low epoxy equivalent and high epoxy equivalent, and organic monobasic unsaturated carboxylic acid with a catalyst at 120-160 ° C. React in the presence of a polymerization inhibitor, and then be diluted with a cross-linkable monomer to synthesize. The resin has good air-drying property, surface dry ≤ 0.5 hours, solid dry ≤ 4 hours, moderate viscosity, good wettability with glass fiber and glass felt, excellent physical and mechanical properties, excellent chemical corrosion resistance, suitable for such as hand lay-up, winding, stretching Extrusion, injection and other FRP molding processes. In the synthesis process of the invention, the production process is simplified, the production energy consumption is reduced, and the product has good stability.

The invention belongs to the technical field of macromolecule polymer and relates to a synthesis method of modified epoxy vinyl ester resin. The synthesis method includes the following steps: according to mass percent, adding 35-50% of epoxy resin, 8-20% of unsaturated monocarboxylic acid, 4-18% of dicyclopentadiene maleic acid, 0.1-1.0% of catalyst and 0.01-0.1% of flame retardant in a reactor. The mixture reacts at 90-120 DEG C until the acid value reduces to below 10mg KOH / g at end point of reaction. When cooled below 110 DEG C, 25-40% of crosslinking agent is added. Uniform stirring is conducted at below 70 DEG C to get modified epoxy vinyl ester resin. The advantages of the method are as follows: by replacing the unsaturated monocarboxylic acid partially or wholly with dicyclopentadiene maleic acid to react with epoxy resin, being simple in operation, little of side reaction, easy control on reaction end point, environment-friendly; and producing products fine in air drying property, quick in curing speed, high adhesion of film painting, low contractibility rate and good in corrosion resistance. The synthesis method is applicable to making various products of composite materials and dies.

The present invention relates to the technical field of polymer material preparation, and especially to an air-drying unsaturated polyester resin for an easy-polishing gel coat, and a preparation method thereof. The resin is prepared by the following steps, wherein the steps comprise that: an organic polyol and a renewable vegetable oil are subjected to an ester exchange reaction, and then are subjected to a condensation polymerization with a small molecule dihydric alcohol or a dibasic acid, tetrahydrophthalic anhydride and allyl ether; the formed polymer is dissolved in styrene to prepare the resin. The air-drying unsaturated polyester resin of the present invention has the following advantages that: (1) the renewable vegetable oil is selected as the main component, such that the use of the toxic and harmful chemical engineering raw materials is reduced so as to meet the green environmental protection concept; (2) the vegetable oil, the tetrahydrophthalic anhydride, the allyl ether and the like in the resin component provide good air-drying properties, such that the resin can be widely applicable for the fields with high air-drying requirements. The resin of the present invention is mainly applicable for the easy-polishing gel coat with the high air-drying requirements, and has characteristics of excellent toughness, excellent adhesion, excellent weather resistance, excellent polishing property and the like. In addition, the resin of the present invention has good air-drying property, and the gel coat prepared by the resin of the present invention has characteristics of good adhesion, low porosity, easy polishing and the like.