Ricoh Company, Ltd.

Yutaka Sakai

Susumu Kawakami

Hironori Hata

Fumihiro Sasaki

Satoshi Mochizuki

Keishi Taniguchi

Shigeyuki Harada

Tohru Suganuma

Takahisa Kato

Hidefumi Gohhara

Shigekazu Teranishi

Yoichi Iwaki

Norio Yokoyama

A carrier for a dry two-component developer, includes a core material and a silicone-modified acrylic resin layer coated on the surface of the core material, the silicone-modified acrylic resin layer including a silicone-modified acrylic resin, with the ratio of the percentage transmission of infrared spectrum Si--O stretching vibrations (T.sub.Si) of the silicone-modified acrylic resin layer to the percentage transmission of infrared spectrum C.dbd.O stretching vibrations (T.sub.C) thereof, T.sub.Si /T.sub.C, being at least 1.0. The silicone-modified acrylic resin layer can be made from a water-soluble synthetic resin solution containing a silicone macromonomer (A) with a vinyl group being introduced into one terminal thereof, and a vinyl monomer (B) which is copolymerizable with the silicone macromonomer (A), with the molecular weight of the silicone macromonomer (A) of the silicone-modified acrylic resin being in the range of 1,000 to 10,000. Methods of producing such carriers are provided.

Carrier for dry two-component developer and method of producing the same

A thermal image transfer recording medium is composed of a support, a thermal image transfer ink layer formed thereon, and a heat resistant protective layer which is composed of a cellulose-modified polymer with a backbone polymer thereof being cellulose and/or a cellulose derivative and a branch polymer thereof being a copolymer of a reactive silicone oil and a vinyl monomer, and which is formed on the back side of the support opposite to the thermal image transfer ink layer with respect to the support.

Thermal image transfer recording medium

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Aichi, Japan

Yutaka Sakai