Abstract: A polysiloxane-polyalkylene glycol block copolymer is obtained by reacting a polysiloxane (A) having any functional group selected from a carboxylic anhydride group, a hydroxyl group, an epoxy group, a carboxyl group, and an amino group with a polyalkylene glycol (B) having any functional group selected from a carboxylic anhydride group, a hydroxyl group, a carboxyl group, an amino group, an epoxy group, a thiol group, and an isocyanate group, wherein a content of a structure derived from the polysiloxane (A) is 20% by mass or more and 90% by mass or less with respect to 100% by mass of the polysiloxane-polyalkylene glycol block copolymer.

Abstract: A polysiloxane-polyalkylene glycol block copolymer obtained by reacting a polysiloxane (A) having a functional group selected from the group consisting of a carboxylic anhydride group, a hydroxyl group, an epoxy group, an amino group, and a thiol group with a polyalkylene glycol (B) having a functional group selected from the group consisting of a carboxylic anhydride group, a hydroxyl group, an amino group, an epoxy group, and a thiol group to obtain a polysiloxane-polyalkylene glycol block copolymer intermediate, and further reacting a part of the carboxyl groups of the polysiloxane-polyalkylene glycol block copolymer intermediate with a compound reactive with a carboxyl group, wherein a content of a structure derived from the polysiloxane (A) is 30% by mass or more and 70% by mass or less with respect to 100% by mass of the entire polysiloxane-polyalkylene glycol block copolymer, and the polysiloxane-polyalkylene glycol block copolymer has a carboxyl group content of 0.1 mmol/g to 0.

Abstract: A polysiloxane-polyalkylene glycol block copolymer is obtained by reacting a polysiloxane (A) having any functional group selected from a carboxylic anhydride group, a hydroxyl group, an epoxy group, a carboxyl group, and an amino group with a polyalkylene glycol (B) having any functional group selected from a carboxylic anhydride group, a hydroxyl group, a carboxyl group, an amino group, an epoxy group, a thiol group, and an isocyanate group, wherein a content of a structure derived from the polysiloxane (A) is 20% by mass or more and 90% by mass or less with respect to 100% by mass of the polysiloxane-polyalkylene glycol block copolymer.

Abstract: A thermoplastic resin composition includes 100 parts by weight of at least one thermosplastic resin (A); and 0.1 to 50 parts by weight of a compound (B) intramolecularly including at least one functional group R (where a plurality of functional groups R optionally have structures identical with each other or structures different from each other) having a hydrogen bond donor and/or a hydrogen bond acceptor that are capable of intermolecularly forming at least two or more hydrogen bonds.