The present invention provides a pre-coating agent capable of, without containing a polyvalent metal salt, preventing or reducing mottling and bleeding to improve the print image quality and preventing or reducing strike-through of an ink composition for inkjet recording during printing using the ink composition for inkjet recording, as well as being capable of preventing or reducing peeling and a decrease in hardness of an overcoat layer in the post-process (formation of the overcoat layer). Provided is a pre-coating agent for forming a precoat layer to receive an ink composition for inkjet recording, the pre-coating agent containing inorganic particles, an amine salt of an organic acid, a resin emulsion, and water, the inorganic particles having a particle size of 1 m to 10 m, the pre-coating agent being free from a polyvalent metal salt.

A calcium-magnesium composite fireproof and flame-retardant material, a preparation method and applications thereof, and a flame-resistant optical/electrical cable and a preparation method thereof are provided. The present disclosure only uses water as a solvent, VAE latex as a polymer matrix, a biomass calcium material and magnesium hydroxide as fillers, and the raw materials have low price and are easy to obtain. The calcium-magnesium composite fireproof and flame-retardant material has excellent flame retardancy and mechanical strength. The present disclosure utilizes the layered structure of the biomass calcium material, a gas generation mechanism, stable thermal decomposition products, and excellent mechanical properties, and can effectively enhance the flame retardancy and mechanical properties of the calcium-magnesium composite fireproof and flame-retardant material. The present disclosure enhances the flame-retardant performance, tensile strength and tensile rate of the calcium-magnesium composite fireproof and flame-retardant material through a synergistic effect of magnesium hydroxide and biomass calcium material.

The present invention provides a black light shielding component with low gloss and high blackness, capable of achieving a black color close to pure black. The black light shielding component comprises a substrate and a light shielding layer (3) formed on at least one surface of the substrate. The light shielding layer (3) contains black microparticles, chain-like structure materials (33), and a resin component (31). By using chain-like silica as the chain-like structure materials (33), an L value of 7 or less, a spectral reflectance of 0.8% or less for light at a wavelength of 360 nm, and a highly black, near-pure black color can be achieved.

A multilayer coating film comprising: a lustrous layer that is formed directly or indirectly on a surface of a coating target and contains a luster material; and a colored layer that is stacked on the lustrous layer, contains a coloring agent, and has translucency, and when a light incident angle is 45, and a lightness L* value and a chroma C* value of reflected light measured at a light receiving angle are L*() and C*(), respectively, the multilayer coating film satisfying the following formulae (1) to (3):

[00001]$\begin{array}{cc}5L^{*}\left(\right)25\left(1025\right)& \left(1\right)\end{array}$$\begin{array}{cc}20C^{*}\left(\right)65\left(1025\right)& \left(2\right)\end{array}$$\begin{array}{cc}2C^{*}\left(80\right).& \left(3\right)\end{array}$

An object of the present invention is to provide an adhesive composition and a coating composition that have storage stability, high adhesiveness, and excellent blocking resistance and water resistance. The present invention provides a crystalline polyester resin comprising: a polyvalent carboxylic acid component and polyhydric alcohol component as a copolymerization components, wherein, 30 to 70 mol % of terephthalic acid, 10 to 60 mol % of 1,4-cyclohexanedicarboxylic acid, 5 to 30 mol % of aliphatic dicarboxylic acid having 10 or smaller of carbon atoms, and less than 3 mol % of an aromatic dicarboxylic acid component having a sulfonate group are contained as the polyvalent carboxylic acid component; and 50 to 100 mol % of 1,4-butanediol is contained as the polyhydric alcohol; wherein, an acid value of the crystalline polyester resin is 100 to 600 eq/t; a glass transition temperature of the crystalline polyester resin is 30 to 30 C.; a melting point of the crystalline polyester resin is 70 to 160 C.; and a number-average molecular weight of the crystalline polyester resin is 5000 to 40000.