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3814results about How to "High solid content" patented technology

High solid content latent curing polyurethane acroleic acid hybrid emulsion

The invention relates to a method for preparing a high solid content latent cured polyurethane acrylic acid heterozygous latex and an application thereof. The preparation method comprises the following steps: pre-polymerizing polyester polyalcohol, hydrophilic chain extender and diisocyanate monomer to obtain the polyurethane prepolymer containing a hydrophilic group (carboxyl or sulfo group) and a terminal NCO group; then, neutralizing the polymer into salt and dispersing the salt in water to prepare the polyurethane water dispersoid; finally, using the dispersoid as macro molecular emulsifying agent and reactant to emulsify and disperse the acrylic ester monomer, initiating the polymerization by heating, dropping initiator to perform the latex polymerization, and regulating the pH of the latex by adding a latent curing agent to obtain the high solid content latent cured polyurethane acrylic acid heterozygous latex. The high solid content latent cured polyurethane acrylic acid heterozygous latex has a solid content of above 45%; the storage of the high solid content latent cured polyurethane acrylic acid heterozygous latex is stable; and high hardness film coating can be formed at the room temperature. Compared with acrylic acid latex and polyurethane latex, the high solid content latent cured polyurethane acrylic acid heterozygous latex has better film forming performance, water resistance, alcohol resistance, pollution resistance, dry/wet cleaning resistance and chemical solvent resistance, as well as high hardness.
Owner:SOUTH CHINA UNIV OF TECH

Thick paste quick-drying type weather-resistant and wear-resistant coating for wind turbine blades and preparation method thereof

The invention discloses a thick paste quick-drying type weather-resistant and wear-resistant coating for wind turbine blades and a preparation method thereof, the coating takes poly-asparaginic acid ester and elastic resin-modified aliphatic isocyanate as base materials, a nano-material is adopted for being effectively bonded with a resin matrix, and appropriate auxiliaries and additives for enhancing the performances of the coating. The thickness of a film which is formed by the coating for the wind turbine blades once can achieve 300 mu m; furthermore, the drying speed is fast and the coating is less prone to bubbling; the weather resistance is excellent, and the coating has higher tensile strength and elongation at break, and prominent wear resistance and impact resistance; the performances of water resistance, chemical product resistance, wet heat resistance, salt mist resistance and high and low temperature resistance are excellent; and the coating has certain anti-pollution and anti-icing properties. The construction efficiency of the coating is high, the performances of the coating are particularly suitable for wind field environments in China, the service life of a unit can be prolonged and the maintenance cost can be reduced.
Owner:洛阳双瑞防腐工程技术有限公司

Bicomponent high-strength sprayed polyurethane waterproof paint

The invention provides bicomponent high-strength sprayed polyurethane waterproof paint. The paint consists of a component A and a component B according to the volume ratio of 1 to 1, wherein the component A is a semi-prepolymer synthesized by polyisocyanate with low functionality and polyether glycol; according to weight portion, the component A comprises 50 to 80 portions of the polyisocyanate with functionality of between 2.0 and 2.4 and 20 to 50 portions of the polyether glycol with functionality of between 2 and 4; and the component B comprises 40 to 84 portions of the polyether polyol or amino-terminated polyether or mixture of the polyether polyol and the amino-terminated polyether, 10 to 40 portions of amine chain extender or alcohol chain extender or mixture of the amine chain extender or the alcohol chain extender and 0 to 20 portions of pigment filler and additive. The bicomponent high-strength sprayed polyurethane waterproof paint has mechanical performance close to or even higher than that of a waterproof coiled material, adopts a spraying construction method, is convenient and high-efficient and greatly prolongs the service life of the waterproof material; and a solvent-free system also greatly ensures the environment-friendly requirement of the material, so that the performance is more reliable, high efficient and environment-friendly. Compared with a conventional waterproof material, the bicomponent high-strength sprayed polyurethane waterproof paint has high strength and elongation rate.
Owner:CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP

Preparation method of high-solid-content aqueous polyurethane for leather

The invention relates to the field of synthetic leather material polyurethane, in particular to a preparation method of high-solid-content aqueous polyurethane for leather. The method comprises the process steps of: prepolymerization reaction: reacting polyol, a hydrophilic chain extender and isocyanate monomer; monomer modification: adding polyhydroxy monomer to be modified together with polyurethane prepolymer; salt formation by neutralization: adding a neutralizing agent so that an emulsion forms salt ion groups; and chain extension subsequent to emulsification: dissolving an external emulsifying agent and a sulfonic acid chain extender in water to obtain a solution and adding the solution to the system for performing emulsification. In the invention, the emulsification property of theemulsion is improved by using carboxylic acid type and sulfonic acid type chain extenders, so that polyurethane and water are fully emulsified; simultaneously, due to the employment of the method in which self emulsification and external emulsification are combined, not only the stable emulsion can be synthesized, but also the solid content can be increased; in addition, the use of water as the solvent in emulsification is consistent with the requirement of clean production process; and the finally-synthesized emulsion has good film forming performance, high drying speed, no yellowing, excellent mechanical properties and short process flow, is suitable for the synthesis of leather substrates or surface materials, and can take the place of solvent-type products.
Owner:溧阳常大技术转移中心有限公司

Preparation method of water-based polyurethane adhesive

The invention discloses a preparation method of a water-based polyurethane adhesive, which is characterized by comprising the following steps: mixing adipic acid and dibasic alcohol according to a certain ratio, and performing esterification reaction and polycondensation reaction in the presence of catalyst and stabilizer to synthesize polyester diol; performing prepolymerization on the obtained polyester diol and diisocyanate, reacting for a certain time, and then adding carboxylic acid type hydrophilic monomer, chain extender, crosslinking agent trimethylolpropane and hydroxyl-terminated silicone oil to perform chain extension; adding acetone, cooling, and then adding aliphatic diamine sulfonate to perform chain extension; performing neutralization, dispersion, emulsification and chain extension, and performing reduced pressure distillation to remove the acetone so as to obtain water-based polyurethane emulsion having a high solid content; and adding leveling agent, thickener, defoaming agent and bactericide into the obtained emulsion to obtain the water-based polyurethane adhesive having a high solid content. According to the invention, the water resistance and the heat resistance of the water-based polyurethane adhesive are improved, and the bonding strength is high, thereby ensuring that the water-based polyurethane adhesive is suitable for bonding on shoe materials and leather.
Owner:广东多正树脂科技有限公司

Graphene conductive slurry as well as preparation method and application method of graphene conductive slurry

The invention belongs to the technical field of graphene materials. Graphene conductive slurry is prepared from the following raw materials in parts by weight: 0.5 to 15.0 weight percent of oligegraphene, 0.1 to 0.5 weight percent of a dispersant, 80 to 99.4 weight percent of a diluent and 10 to 40 weight percent of organic resin. According to the graphene conductive slurry disclosed by the invention, by screening the dispersant in the early stage, the graphene can be more easily dispersed in the diluent during a mixing process of graphene powder and the diluent, and an obtained dispersion solution is good in stability; by adding the selected dispersant and using a technology adopted by the invention, stripping of the graphene in the diluent can be promoted; in the graphene conductive slurry, a part of solvent is replaced with a part of resin, so that the solid content of the graphene conductive slurry is increased, the stability of the graphene conductive slurry is increased, re-overlaying of the graphene is prevented, and very good compatibility is also provided for application in the late. The graphene conductive slurry which is good in performance and high in stability can be prepared, the cost is low, the technology is feasible, and the graphene conductive slurry is suitable for industrial production.
Owner:SHENZHEN GUOCHUANG JIAWEI GRAPHENE TECH CO LTD
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