Abstract: An ultraviolet-absorbing composite powder comprising a plurality of composite powder particles, wherein the composite powder particle consists of an inorganic or organic core particle having an average particle diameter of 0.5-100 ?m, and a compound of formula (1): which is adsorbed to the surface of the core particle is provided. The composite powder of the invention exhibits an excellent UV ray protecting property as well as smooth and comfortable texture, and is useful for manufacturing cosmetic products.

Abstract: A two stage emulsion polymerization process for preparing resins having both weather resistance and impact resistance. In the first step, there are copolymerized 100 to 80% by weight of an alkyl acrylate having alkyl containing 2 to 8 carbon atoms; 0 to 20% by weight of a monomer containing a vinylidene group copolymerizable therewith and cross-linking monomer to produce an aqueous dispersion of cross-linked copolymer having degree of swelling above 10, gel content above 80% and average particle size of 0.15 to 0.5 microns. Emulsifier in an amount of 0.05 to 1 % by weight is used. In the second step, 5 to 50 parts by weight of the solid copolymer of the cross-linked polymer of step 1 is polymerized in the presence of 50 to 95 parts by weight of a monomer mixture of at least 50% by weight of aromatic vinyl monomer and less than 50% by weight of vinyl monomer copolymerizable therewith.