A toner comprising a toner particle containing a binder resin containing at least 50 mass % of a polyester resin, wherein the polyester resin contains a polyester resin A having a silicone segment, and in XPS analysis, when X is a ratio of the number of silicon atoms attributable to silicone segments relative to a total number of measured atoms, X1 is a value of the X on the toner particle surface, X2 is a value of the X at a depth of 30 nm from the surface, Z is a ratio of the number of carbon atoms attributable to ester bonds relative to a total number of measured atoms, Z1 is a value of the Z on the toner particle surface and Z2 is a value of the Z at a depth of 30 nm from the toner particle surface, X1, Z1, X2 and Z2 satisfy a specific relationship.

Provided is a hybrid-type polyester resin which, when used in processing a base material such as textile or PET film, can impart excellent flame retardance to the base material. The hybrid-type polyester resin can be inhibited from scattering high-temperature drips, even if the hybrid-type polyester resin burns. The hybrid-type polyester resin comprises both a polyester resin and a siloxane prepared from silica and an alkoxysilane. Therefore, the hybrid-type polyester resin retains the excellent properties inherent in polyester resin and exhibits extremely excellent flame retardance by virtue of hybridization with the siloxane. Even if the hybrid-type polyester resin burns, the hybrid-type polyester resin is less susceptible to deformation, and is therefore inhibited from scattering high-temperature drips.

A composition contains an organosilyl-functional polyester, where the organosilyl-functional polyester is characterized by having multiple terminal carbon-carbon double bonds bound to the polyester through a carbon-oxygen-silicon linkage.