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401results about How to "Good water resistance" patented technology

Environment-friendly type alkali lignin modified phenolic resin adhesive and preparation method thereof

The present invention relates to an environment-friendly alkali-lignin-modified phenolic resin adhesive and a preparation method thereof. The method includes the following steps: water is added into alkali lignin powder, acid is then added, and under a temperature between 100 DEG C and 120 DEG C, acidolysis lasts for one to three hours; desugarized alkali lignin is obtained; the desugarized alkali lignin powder, sodium hydroxide and water are uniformly mixed, oxidant and 2-naphthol are added for reaction, the temperature is reduced to 45 DEG C to 50 DEG C, formaldehyde and phenol are added so that polycondensation reaction occurs, and the environment-friendly alkali-lignin-modified phenolic resin adhesive is prepared. The method adopts acidolysis desugarization to reduce a great deal of alcoholic hydroxyl content in the alkali lignin and modifies the alkali lignin by alkaline hydrolysis, degradation and nucleophilic addition reaction, thus greatly increasing the chemical reaction activity of the alkali lignin, the amount of toxic phenol required in the technique of preparing modified phenolic resin is little, and the residual phenol and formaldehyde are less, so the environment-friendly alkali-lignin-modified phenolic resin adhesive has the advantages of green production technique and product properties.
Owner:SOUTH CHINA UNIV OF TECH

High weather resistance environment-friendly cable fire-refractory coating and preparation process thereof

InactiveCN101597454AGood film forming effectGood water resistanceFireproof paintsSolventAmmonium polyphosphate
The invention discloses high weather resistance environment-friendly cable fire-refractory coating and a preparation process thereof, belonging to the technical field of coating. The process adopts a base material, namely acrylic ester elastic emulsion, as a main film-forming substance, dopes high polymerization degree ammonium polyphosphate into the base material, has good film-forming effect and water resistance. The method particularly selects Number 70 chlorcosane and diantimony trioxide as synergistic flame-retardant to greatly improve the fire retardant performance, has low proportion of pigment and the base material, optimizes compatibility of a fire retardant system; the coating has weather resistance and has oil resistance for selecting fluorocarbon surfactant. The process improves water resistance and weather resistance of the coating, and adopts titanate coupling agent to improve the combining firmness of the pigment, the base material and cable base materials, and the weather resistance of the coating is further improved. Green and environment-friendly water is used as solvent to reduce cost, and as the solvent is removed in preparation or construction, the coating does not pollute the environment and not hurt the health of operators.
Owner:ZHEJIANG TIANHUA FIREPROOF MATERIAL

Room-temperature self-crosslinked aqueous polyurethane-polyacrylate containing fluoroalkyl groups in lateral chains and preparation method thereof

InactiveCN101792592AGood water resistanceAnti-pollution mechanical propertiesPolyurea/polyurethane coatingsPrepolymerChemistry
The invention discloses a room-temperature self-crosslinked aqueous polyurethane-polyacrylate containing fluoroalkyl groups in lateral chains and a preparation method thereof. The preparation method comprises following steps: vacuum-dehydrating polyether glycol containing fluorine, and reacting with polyisocyanate to obtain FPU prepolymer containing -NCO end groups; chain-extending with dimethylolpropionic acid to obtain FPU prepolymer containing carboxyl groups; neutralizing with triethylamine to obtain hydrophilic FPU prepolymer, adding water, stirring, and dispersing at high speed to obtain an emulsion; adding a water solution containing a chain extender ADH to obtain chain-extended FPU; orderly adding diacetone acrylamide and vinyl monomer, and initiating by stirring to obtain the PUA copolymerized emulsion; and finally, uniformly mixing the chain-extended FPU with the PUA copolymerized emulsion, coating the mixture on a teflon plate, and drying and crosslinking at room temperature to form the film. The invention can be widely used for surface protection for plastics, rubber, leather, fabrics, ceramics, glass, high-rise building external walls, solar batteries and other materials and devices.
Owner:SHANGHAI APPLIED TECHNOLOGIES COLLEGE

Compound calcium sulfonate base lubricating grease and preparation method thereof

The invention discloses compound calcium sulfonate base lubricating grease and a preparation method thereof. The key points of the technical scheme of the invention lie in that the compound calcium sulfonate base lubricating grease is prepared by adding calcium sulfonate in an inorganic substance and an organic substance compound calcium soap and thickening base oil, and an arylamine antioxidant is added in a thickening procedure. The high-performance compound calcium sulfonate base lubricating grease is prepared and acquired in a certain raw material ratio and operation condition. By using the compound calcium sulfonate base lubricating grease and the preparation method, the cost of a user is reduced; a product has favorable water resistance, lubricating property and high temperature resistance, cannot be emulsified and degreased, and is not easy to run off; the service life of mechanical equipment is prolonged; the maintenance time of the equipment is decreased; the production efficiency of the equipment is improved; a raw material formula is reasonable; the cost is low; the emission of three wastes does not exist in a production procedure; the compound calcium sulfonate base lubricating grease and the preparation method are environment-friendly while an industrial requirement is met; and the preparation method is a green production process.
Owner:XINXIANG HENGXING TECH CO LTD

UV cured strippable water-based coating and preparing method thereof

The invention relates to a UV cured strippable water-based coating. The UV cured strippable water-based coating is prepared from, by weight, 60-70 parts of UV cured water-based polyurethane resin, 0.05-0.1 part of flatting agent, 1-10 parts of wetting agents, 1-3 parts of thickening agents, 0.2-1 part of antifoaming agent, 2-5 parts of film coalescing agents, 3-6 parts of photoinitiator, 3-8 parts of rust-proof resist, 0.10-0.30 part of mould-proof antibacterial agent, 10-20 parts of functional filler and 10-20 parts of water-based stripping agents. The invention further provides a preparing method of the coating. The preparing method includes the steps that a part of the wetting agents, the antifoaming agent, the rust-proof resist and deionized water are added into a high-speed dispersion machine and dispersed through stirring, the functional filler is added and dispersed through stirring, and the UV cured water-based polyurethane resin, the remaining antifoaming agent, the remaining wetting agents, the flatting agent, the film coalescing agents, the water-based stripping agents, the photoinitiator and the mould-proof antibacterial agents are added and uniformly stirred, continue to be dispersed and are filtered after being mixed to obtain the UV cured strippable water-based coating.
Owner:SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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