39results about How to "Increased double bond content" patented technology

The invention discloses a high-solid-content UV-curing aqueous urethane acrylate dispersion liquid and a preparation method thereof, wherein the method comprises the following steps of: firstly carrying out the monoesterfication reaction on the partial hydroxide group at the tail end of hyperbranched polyester and the anhydride group of dicarboxylic anhydride to obtain an intermediate I; carryingout the end capping reaction on an isocyanate group in diisocyanate and the hydroxide group in a hydroxyalkyl methacrylate monomer to obtain a reaction intermediate II; carrying out the reaction on the residual hydroxide group of the intermediate I and the residual isocyanate group of the reaction intermediate II to obtain a reaction intermediate III; and carrying out alkali neutralization, aqueous dispersion and reduced-pressure distillation on the reaction intermediate III to remove an organic solvent to obtain the UV-curing urethane acrylate aqueous dispersion liquid. The dispersion liquidhas the characteristics of high solid content, relatively low viscosity, UV curability, good mechanical performance of a paint film and the like, conforms to the concept of environmental protection, can be applied to the fields of environment-friendly coatings, aqueous ink, aqueous adhesives, fabric coating agents and the like and has broad prospect.

The invention relates to a temperature-resistant thickening light-curable epoxy vinyl ester resin and a preparation method thereof. Specifically, the present invention discloses an epoxy vinyl ester resin composition comprising components (A) to (G). Also disclosed are a preparation method of the resin composition and a resin product comprising the resin composition.

The present invention relates to the technical field of antistatic agents, and more particularly, to an antistatic agent and a preparation method and application thereof. The preparation raw materials of the antistatic agent include acid anhydride grafted polyether and polypropylene. The acid anhydride grafted polyether is grafted to polypropylene by chemical reaction. Compared with the traditional physical blending method, the polyether is not easy to be precipitated, and the time of antistatic effect is increased. The antistatic agent after grafting is in The distribution in polypropylene is better and uniform, and the antistatic effect is better. Select polyether and polypropylene grafting with appropriate chain length to promote the dispersion of the antistatic agent during the polyolefin processing, while maintaining a certain dispersed phase structure, further promoting the improvement of antistatic properties. Use dianhydride and vinyl polyether grafting to increase the double bond content on the acid anhydride grafted polyether, promote the possibility of grafting polypropylene at lower temperature and time in the process of blending and extrusion, and improve the antistatic agent. Stability and processing efficiency to facilitate large-scale production and applications.

The invention discloses a reactive emulsifier for emulsion polymerization, a preparation method and application thereof. The reactive emulsifier includes the compound(s) shown as formula (I) and / or formula (II) in the specification. The preparation method includes: carrying out ring-opening reaction on fatty primary amine and a glycidyl ether compound with unsaturated double bond, then conducting alkoxylation on the product to obtain a nonionic reactive emulsifier with a reactive double bond and an anionic reactive emulsifier derived therefrom. The emulsifier provided by the invention employs the reaction of primary amino and the glycidyl ether compound to introduce the double bond, the reaction activity and selectivity are stronger, and the reaction conditions are milder, the double bond loss in the reaction can be reduced, and the reactive double bond content of the final emulsifier product can be increased. In the process of emulsion polymerization, the emulsifier has higher reactivity with monomers, and can improve the water resistance of emulsion products more effectively.

The invention discloses an unsaturated alkenyl polyether monomer for water reducer of cement and a preparation method thereof. The polyether monomer has a structural formula shown in HO-(R1)m-(R2)n-R3-CH=CH2, wherein R1 is CH2CH2O, R2 is CH2CH2CH2O, m and n are both integers between 0 and 100 and the sum of m and n is equal to or greater than 50 and less than or equal to 100 and R3 is hydrocarbyl with 2-4 carbon atoms. According to the invention, since alkynol is adopted to have ring-opening polymerization reaction with ethylene oxide and / or propylene oxide under the action of a basic catalyst, the generation of polyethylene glycol and polyethylene glycol mono-alcohol ether which are by-products of an ethoxylation reaction can be effectively reduced and the phenomenon that the molecular weight distribution of the product is broadened is avoided.

The invention discloses a photocurable resin based on epoxy vegetable oil and gallic acid, a preparation method and application thereof. The present invention first uses gallic acid and acrylic anhydride compounds to react to obtain a gallic acid triacrylate / acrylic acid compound mixed intermediate; then uses epoxy vegetable oil to perform epoxy ring-opening reaction with the obtained mixed intermediate to obtain a novel bio-based ring Oxyacrylate prepolymer; finally add diluting monomer, photoinitiator, polymerization inhibitor, etc., and disperse evenly to obtain bio-based photocurable resin. The obtained resin has the advantages of low viscosity, fast curing speed and the like, and the mechanical and thermodynamic properties of the cured material are excellent. Therefore, it can be used as matrix resin applications such as photocurable 3D printing materials, coatings and inks. The process of the invention is simple and environment-friendly, and most of the raw materials come from renewable resources, so it has great significance for promoting the sustainable development of light-curing materials.