The invention discloses a preparation method of a phase change microcapsule. The preparation method comprises the following steps: using a solid-liquid phase change material as a core material and a polymer as a wall material, and preparing a white powdered phase change microcapsule by adopting synthesis of a prepolymer, emulsification of the phase change material and step-by-step dropwise addition of the prepolymer, wherein when the prepolymer is dropwise added each time, the pH value of the emulsion is controlled to enable the prepolymer to be sufficiently reacted. The prepared phase change microcapsule is excellent in properties, low in breakage rate, and low in residual free formaldehyde content; the preparation method of the phase change microcapsule is suitable for preparing the microcapsule by using melamine-formaldehyde, urea formaldehyde resin, phenolic resin, urea-melamine-formaldehyde resin and the like as the shell materials; the preparation method is simple, lower in cost, cheap and accessible in the used raw materials; the preparation method of the phase change microcapsule, disclosed by the invention can be used for effectively reducing the residual formaldehyde content in the phase change microcapsule and expanding the range of application of the phase change microcapsule.

Preparation method of phase change microcapsule

The invention relates to a water-based environment-friendly modified alkyd wood paint. The film forming matter is a modified alkyd emulsion which accounts for 50-80 wt% of the water-based wood paint; and the wood paint also comprises a dispersing agent, a wetting agent, a defoaming agent, a thickener, a pH regulator and the like. The modified alkyd wood paint can effectively enhance the permeability of the coating for the substrate, and can also use recyclable biological resources in wood paint industry, thereby reducing the environmental pollution and lowering the production and application cost. The modified alkyd wood paint has the characteristics of easy construction, plump coating and favorable decoration property in the alkyd paint, improves the characteristics of low-temperature quick drying (can quickly form a film at 0 DEG C without any film-forming assistant or cosolvent), yellowing resistance, wear resistance, water resistance and the like in the paint film, and has environment friendliness and economical efficiency.

Water-based environment-friendly modified alkyd wood paint

The invention discloses an n-tetradecanol phase change microcapsule. The n-tetradecanol phase change microcapsule comprises a polymer shell and an n-tetradecanol core material wrapped in the shell and is prepared by a suspension polymerization method, wherein the polymer shell is obtained by polymerizing monomers in the presence of an initiator and the monomers comprise nitrile, (meth)acrylate and carboxyl-containing monomers. According to the n-tetradecanol phase change microcapsule, nitrile monomers are introduced in the polymer shell so that the temperature resistance of the phase change microcapsule is improved and the application range of the phase change microcapsule is expanded; in addition, since the nitrile monomers has better film-forming property, the phase change microcapsule prepared from the nitrile monomers has better permeability resistance and the leakage of the phase change material can effectively prevented. The phase change microcapsule disclosed by the invention can have wide application prospects in such fields as textile, construction and paints. Since the monomers are free of formaldehyde, the production is safer and more conducive to environmental friendliness and human health.

N-tetradecanol phase change microcapsule and preparation method thereof

The invention provides water-based alkyd resin and modified acrylic emulsion metal paint which is prepared by the following components in parts by weight: 18-22 parts of water-based alkyd resin, 14-18 parts of iron oxide red, 14-18 parts of barium sulfate, 3.8-4.8 parts of deionized water, 1.5-2.0 parts of ethylene glycol monobutyl ether, 0.24-0.30 parts of neutralizing amine, and 36-49 parts of acrylic emulsion resin for water-based metal. The water-based alkyd resin and modified acrylic emulsion metal paint is low in cost and simple in preparation technology; by selecting the optimum proportion of the water-based alkyd resin to an acrylic emulsion for the water-based metal, the problems that paint prepared only by the emulsion has a plurality of pores, and is poor in moisture penetration protection are solved; the defects that paint prepared only by the water-based alkyd resin is slow in drying, low in rigidity and poor in water resistance are overcome; and the prepared metal protective paint is good in luster, excellent in adhesive force, high in water resistance, and outstanding in salt spray resistance.

Water-based alkyd resin and modified acrylic emulsion metal paint and preparation method thereof

Method for preparing microcapsule phase change material by using composite emulsifier

The invention relates to an aqueous alkyd acrylic resin paint and a preparation method thereof. According to the invention, high-molecular alkyd resin with main chain containing unsaturated double bond is synthesized through molecular design. Alkyd resin is subjected to free radical graft copolymerization with acrylic monomer. A reaction system is neutralized by using an amine compound, such that water-reducible alkyd acrylic resin is synthesized. Molecular chains of alkyd and acrylic resins are connected through chemical bond, such that the compatibility of the two resins is improved. In a material curing and shaping process, phase separation of the resin is avoided. Deionized water, a pigment, a filling material, an antifoaming agent, a dispersing agent, a siccative, and alkyd acrylic hybrid emulsion are uniformly dispersed, such that the aqueous alkyd acrylic resin paint is obtained. The aqueous alkyd acrylic resin paint comprises the components of: aqueous alkyd acrylic resin 65%-80%, the pigment 3%-4%, the filling material 6-10%, deionized water 10%-20%, the dispersing agent 0.05%-0.5%, the antifoaming agent 0.10%-0.30%, and the siccative 0.9%-3.5%.

Aqueous alkyd acrylic resin paint and preparation method thereof

The invention provides n-tetradecyl alcohol phase-change microcapsule and a preparation method thereof. According to the invention, a melamine-formaldehyde resin is used as a wall material, n-tetradecyl alcohol is used as a core material, and an emulsification method of combined liquid crystalline phase emulsification method of microemulsion and phase inversion temperature method is utilized to prepare n-tetradecyl alcohol emulsion; prepared melamine-formaldehyde performed polymers and n-tetradecyl alcohol emulsion are utilized to prepare the n-tetradecyl alcohol phase-change microcapsule by using in situ polymerization. The n-tetradecyl alcohol phase-change microcapsule has the advantages of no residual formaldehyde, an uniform particle size, great latent heat of phase change, resistance to organic solvents and good water resistance, and is easy to blend with cement concrete and a variety of resins to form composite high-molecular phase-change materials with more excellent performance.

N-tetradecyl alcohol phase-change microcapsule and preparation method thereof

The invention discloses infrared camouflage paint and a preparation method thereof. The infrared camouflage paint uses three different phase change materials with different phase transition temperature ranges as the core materials and melamine-formaldehyde resin as the wall material; and the in-situ polymerization method is adopted to prepare phase change microcapsules which are used as the temperature controlling material to be added in the infrared camouflage paint, thus the temperature of the target can be regulated, the thermal infrared radiation intensity of the target can be controlled, the aim of infrared camouflage can be achieved and the infrared camouflage requirement of the protected target can be met at about 10-60 DEG C. By adopting the paint, the defects of the low emissivity infrared camouflage material that the paint and the visible light are difficult in compatibility, especially in the radar frequency band, the tolerance of the paint on the pollution is poor, the emissivity can be obviously increased owning to dust and water and the camouflage effect is lowered, can be overcome.

Infrared camouflage paint and preparation method thereof

The invention relates to phase-change energy-saving coating and a preparation method thereof. The phase-change energy-saving coating is prepared by using dodecanol as a core material, using melamine-urea formaldehyde resin as a wall material and using phase-change microcapsules synthesized by an in-situ polymerization method as temperature-controlled materials, wherein the indoor temperature can be adjusted through heat absorption and heat release of the phase-change microcapsules. An ultraviolet absorbent is added into the coating, so the ageing resistance of the coating is improved greatly. The phase-change energy-saving coating and the preparation method thereof have the characteristics of readily available raw materials, simple process and the like, and are suitable for large-scale industrialized production.

Phase-change energy-saving coating and preparation method thereof

The invention relates to an alkyd acrylic graft copolymer paint and a preparation method thereof. According to the invention, high-molecular alkyd resin with main chain containing unsaturated double bond is synthesized through molecular design. Alkyd resin is subjected to free radical graft copolymerization with acrylic monomer. Molecular chains of alkyd and acrylic resins are connected through chemical bond, such that the compatibility of the two resins is improved. In a material curing and shaping process, phase separation of the resin is avoided. A solvent, a pigment, a filling material, an antifoaming agent, a dispersing agent, and the alkyd acrylic graft copolymer are grinded and dispersed; a siccative is uniformly dispersed in the mixture, such that the alkyd acrylic graft copolymer paint is obtained. The paint comprises the components of: alkyd acrylic graft copolymer 65%-80%, the pigment 3%-4%, the filling material 6-10%, xylene 10%-20%, the dispersing agent 0.45%-0.7%, the antifoaming agent 0.10%-0.32%, and the siccative 0.9%-3.5%.

Alkyd acrylic graft copolymer paint and preparation method thereof

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