The present disclosure relates to a matting agent including polymer particles, a matting polymer composition including a matting agent, and a method of producing polymer particles. The polymer particles may be produced by a simple process using a suspension polymerization method, and is relatively easy to control a degree of crosslinking. In addition, in a case where a matting polymer composition is prepared using a matting agent including the polymer particles, it is possible to manufacture a molded article having excellent appearance and matting effect without deterioration of the existing mechanical properties such as impact strength and tensile strength of a thermoplastic polymer, and in particular, an excellent matting effect may be exerted even in the extrusion processing, which has been difficult to achieve in the related art.

A construction material includes a base material. The base material includes a low-gloss region having a 60° gloss value of smaller than and a high-gloss region having a 60° gloss value of larger than or equal to 8. The 60° gloss value of the low-gloss region and the 60° gloss value of the high-gloss region are different from each other by 5 or greater.

A construction material includes a base material. The base material includes a low-gloss region having a 60° gloss value of smaller than and a high-gloss region having a 60° gloss value of larger than or equal to 8. The 60° gloss value of the low-gloss region and the 60° gloss value of the high-gloss region are different from each other by 5 or greater.

The present invention relates to a composition comprising an aqueous dispersion of a) polymer particles having a z-average particle size in the range of from 50 nm to 500 nm; b) anion exchange resin particles having a D.sub.50 median particle size in the range of from 0.1 μm to 50 μm; and c) polymeric organic microspheres having a D.sub.50 median particle size in the range of from 1 μm to 20 μm, wherein the weight-to-weight ratio of polymer particles to microspheres is in the range of from 0.5:1 to 20:1. The composition of the present invention is useful for paint compositions that form matte finishes with an excellent balance of stain blocking and stain removal properties.

The present invention relates to a composition comprising an aqueous dispersion of a) polymer particles having a z-average particle size in the range of from 50 nm to 500 nm; b) anion exchange resin particles having a D.sub.50 median particle size in the range of from 0.1 μm to 50 μm; and c) polymeric organic microspheres having a D.sub.50 median particle size in the range of from 1 μm to 20 μm, wherein the weight-to-weight ratio of polymer particles to microspheres is in the range of from 0.5:1 to 20:1. The composition of the present invention is useful for paint compositions that form matte finishes with an excellent balance of stain blocking and stain removal properties.

The present invention relates to an aqueous dispersion of polymeric microspheres with a high surface Young's modulus and a relatively low core Young's modulus. The dispersion of the present invention is useful in paint formulations for providing improving hydrophobic stain resistance, for example, resistance to lipstick.

Disclosed are an optical structure, and a camera module and an electronic device including the same. The optical structure includes a transparent substrate; a first moisture-proof layer disposed on the transparent substrate and including a first organic material having moisture-proof properties; and a first near-infrared absorbing layer disposed between the transparent substrate and the first moisture-proof layer and including a copper complex, wherein the first organic material having moisture-proof properties has a water vapor transmission rate (WVTR) of less than or equal to about 100 g/m.sup.2/day measured at a thickness of 100 μm.

Disclosed are an optical structure, and a camera module and an electronic device including the same. The optical structure includes a transparent substrate; a first moisture-proof layer disposed on the transparent substrate and including a first organic material having moisture-proof properties; and a first near-infrared absorbing layer disposed between the transparent substrate and the first moisture-proof layer and including a copper complex, wherein the first organic material having moisture-proof properties has a water vapor transmission rate (WVTR) of less than or equal to about 100 g/m.sup.2/day measured at a thickness of 100 μm.

A process for preparing an aqueous polymer dispersion, wherein the process comprising free-radically initiated emulsion polymerization in an aqueous medium, in the presence of at least one vinyl polymer A, to obtain a polymer B comprising a vinyl polymer phase B1 with a glass transition temperature of from −20 to +15° C. and a vinyl polymer phase B2 with a glass transition temperature of from +50 to +110° C., with the proviso that the difference in glass transition temperature between polymer B1 and polymer B2 is at least 40° C., wherein the weight ratio of polymer B1 to polymer B2 is from 80:10 to 10:20, wherein the at least one polymer A is obtained by a process comprising: free-radically initiated bulk or solution polymerizing of: from 5 to 25 wt. % of at least one carboxylic acid functional ethylenically unsaturated monomer A1, and from 75 to 95 wt. % of at least one ethylenically unsaturated monomer A2 different than monomer A1, where the amounts are given relative to the total weight of monomers charged in the polymerization to prepare the vinyl polymer A, wherein the weight average molecular weight of the polymer A is lower than the weight average molecular weight of the polymer B, and wherein the weight ratio of polymer A to polymer B is from 10:90 to 40:60.

A process for preparing an aqueous polymer dispersion, wherein the process comprising free-radically initiated emulsion polymerization in an aqueous medium, in the presence of at least one vinyl polymer A, to obtain a polymer B comprising a vinyl polymer phase B1 with a glass transition temperature of from −20 to +15° C. and a vinyl polymer phase B2 with a glass transition temperature of from +50 to +110° C., with the proviso that the difference in glass transition temperature between polymer B1 and polymer B2 is at least 40° C., wherein the weight ratio of polymer B1 to polymer B2 is from 80:10 to 10:20, wherein the at least one polymer A is obtained by a process comprising: free-radically initiated bulk or solution polymerizing of: from 5 to 25 wt. % of at least one carboxylic acid functional ethylenically unsaturated monomer A1, and from 75 to 95 wt. % of at least one ethylenically unsaturated monomer A2 different than monomer A1, where the amounts are given relative to the total weight of monomers charged in the polymerization to prepare the vinyl polymer A, wherein the weight average molecular weight of the polymer A is lower than the weight average molecular weight of the polymer B, and wherein the weight ratio of polymer A to polymer B is from 10:90 to 40:60.