Abstract: An aliphatic polyester resin composition, useful for producing molded articles without causing deformation at the mold release time, has a non-copolymerized mixture of an aliphatic polyester resin including one or more polylactic acid resins and a crystallization nucleating agent including one or more metal salts of an aromatic sulfonate of Formula 1: where X is a residual group obtained by removing three hydrogen atoms from benzene, R1 and R2 are each hydrocarbon group with 1-6 carbon atoms, M is one or more selected from the group of potassium atom, rubidium atom, barium atom, strontium atom and calcium atom, and n is 1 if M is alkali metal atom and 2 if M is alkali earth metal atom; the aliphatic polyester resin composition contains 0.01-5 weight parts of the one or more metal salts of aromatic sulfonate shown by Formula 1 for 100 weight parts of the aliphatic polyester resin.

Abstract: Organosilicone fine particles of size in the range of 0.1-20 ?m, each having 20 or more faces with indefinite shapes and a network of convex parts that surround these faces with indefinite shapes on its surface, and being spherical as a whole respond to highly advanced requirements of recent years including improvements in optical characteristics of resin compounds, usability and feeling of cosmetics and maintainability of fluidity of development toners. The invention further provides methods of producing such organosilicone fine particles.

Abstract: Non-spherical fine particles capable of responding to highly advanced requirements of recent years, including further improvements in optical characteristics such as total light transmittance and optical diffusible property related to resin molded products and further improvements in feeling, soft focus, coverage and durability related to cosmetic products, as well as methods of their production and their use are provided. These non-spherical fine particles each have a polyhedral general shape with six or more surfaces each of which is formed as a concave surface, satisfying all of the conditions that the average value of the maximum external diameters L1 of the non-spherical fine particles is in the range of 0.1-20 ?m, that the ratios between the minimum external diameters L2 and the maximum external diameters L1 of the individual non-spherical fine particles have an average value in the range of 0.60-0.

Abstract: Organosilicone fine particles of size in the range of 0.1-20 ?m, each having 20 or more faces with indefinite shapes and a network of convex parts that surround these faces with indefinite shapes on its surface, and being spherical as a whole respond to highly advanced requirements of recent years including improvements in optical characteristics of resin compounds, usability and feeling of cosmetics and maintainability of fluidity of development toners. The invention further provides methods of producing such organosilicone fine particles.

Abstract: Molded articles with improved physical characteristics are obtained under molding conditions for general resin without causing deformation at the mold releasing time if a composition containing aliphatic polyester resin and one or more metal salts of aromatic sulfonate of a specified kind is used. Such a composition is placed inside a mold maintained at a temperature below the crystallization-initiating temperature by differential scanning calorimetry and above the glass transition temperature is molded while it crystallizes.