Sanyo Chemical Industries, Ltd.

Tsuyosi Izumi

Takashi Akutagawa

Yasuhiro Ono

Tadao Takikawa

Masakazu Iwata

Shuhei Yahiro

Disclosed is a heat-fusible electrostatic image developing toner which has an excellent balance between fixability at low temperatures and grindability and is excellent in glossiness after fixing. Also disclosed is a resin for toners. A polyester resin for toners which is obtained by polycondensing a polyol component and a polycarboxylic acid component is characterized by containing 20-100 weight % of one or more polyester resins (A1) having a storage elastic modulus from 2.5 x 10Pa to 5 x 10Pa at 150&#xb0; C. wherein the molar average cohesive energy of the polyol component is between 7.0 x 10and 1.4 x 10J.

Polyester resin for toner, toner composition and resin particle

Disclosed is a heat-fusible electrostatic image developing toner which has an excellent balance between fixability at low temperatures and grindability and is excellent in glossiness after fixing. Also disclosed is a resin for toners. A polyester resin for toners which is obtained by polycondensing a polyol component and a polycarboxylic acid component is characterized by containing 20-100 weight % of one or more polyester resins (A1) having a storage elastic modulus from 2.5&#xd7;10Pa to 5&#xd7;10Pa at 150&#xb0; C. wherein the molar average cohesive energy of the polyol component is between 7.0&#xd7;10and 1.4&#xd7;10J.

Growing community of inventors

Kyoto, Japan

Tsuyosi Izumi