Abstract: The present invention provides: catalyst particles for use in producing a polyester which has a satisfactory color tone and, after having been molded, has satisfactory transparency (low haze); and a method for producing a polyester using the catalyst particles. The catalyst particles for polyester production according to the present invention comprise a product of reaction between the following titanium compound ingredient (A) and the following phosphorus compound ingredient (B) and have a particle diameter D50 of 10.0 or smaller and a particle diameter D90 of 20.0 ?m or smaller. Ingredient (A): A titanium compound ingredient comprising at least one compound selected from among titanium compounds (1) represented by formula (I) and titanium compounds (2) each obtained by reacting any of the titanium compounds of general formula (I) with either an aromatic polycarboxylic acid represented by general formula (II) or an anhydride thereof.

Abstract: A polymeric binder includes an ion-conducting polymer containing a polymer and a metal ion. The polymer is preferably selected from the group consisting of polyester, polyether, anionic polymer, polycarbonate, and silicone. An all-solid-state secondary battery includes an inorganic solid electrolyte, and the inorganic solid electrolyte in at least an electrode mixture layer or an inorganic solid electrolyte layer is bound together by the polymeric binder.

Abstract: A polymeric binder includes copolymerized aliphatic polycarbonate having structural units expressed by Formula (1) and Formula (2). In Formula (1) and Formula (2), R1 and R2 independently denote alkylene groups having 2 to 20 carbon atoms and being nonidentical to each other, and m and n independently denote integers equal to or greater than 3 and equal to or less than 60.