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US 5,397,668 AGranted
Developer composition for electrostatic latent images
AssigneeKao Corporation
InventorsYukiya Sato, Hisakazu Tajima, Yoshihiro Ueno, Kouji Kameyama, Masayoshi Nawa
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Abstract
A developer composition comprising a carrier, whose surface layer comprises a silicone resin having a urethane bond, and a toner, which is little affected by environmental factors, so that it can develop good electrostatic latent images even under low-temperature and low-humidity conditions and under high-temperature and high-humidity conditions, to give high-quality prints.
Claims12
A developer composition for electrostatic latent images which comprises:
- (A) a carrier comprising:
- (1) a core material, and
- (2) a surface layer coating said core material comprising a silicone-containing resin containing a urethane bond;
- and
- (B) a toner comprising:
- (1) a binder resin, and
- (2) a colorant.
4 more elements
A developer composition for electrostatic latent images which comprises:
- (A) a carrier comprising:
- (1) a core material;
- and
- (2) a surface layer coating said core material produced by the reaction of:
- (a) an organic resin having at least two groups selected from the group consisting of a hydroxyl group and a group giving a hydroxyl group in the reaction system;
- (b) a relatively low molecular weight silicone resin having at least two groups selected from the group consisting of a hydroxyl group and a group giving a hydroxyl group in the reaction system;
- (c) a crosslinking agent:
- and
- (d) a polyisocyanate compound;
- and
- (B) a toner comprising:
- (1) a binder resin;
- and
- (2) a colorant.
11 more elements
Dependencies are inferred from the claim text.