[특허]Color toner and two-component developer containing same

Color toner and two-component developer containing same 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G03G-009/09 G03G-009/107 G03G-009/113 G03G-009/097
출원번호	US-0813099 (1991-12-24)
우선권정보	JP-0009467 (1987-01-19)
발명자 / 주소	Kobayashi Hiroyuki (Yokohama JPX) Uchida Mitsuru (Chofu JPX) Okado Kenji (Yokohama JPX)
출원인 / 주소	Canon Kabushiki Kaisha (Tokyo JPX 03)
인용정보	피인용 횟수 : 20 인용 특허 : 0

초록 ▼

Four color toners of yellow, magenta, cyan and black, and four two-component developers containing the four color toners respectively in combination with a resin-coated ferrite carrier suitable for multi-color electrophotographic copying are provided Each of the four-color toners is strictly regulated in relation not only to the carrier but also to the other color toners. More specifically, each color toner is strictly controlled with respect to a particle size distribution, freeness from agglomeration, melting characteristics including heat-absorption peaks and apparent viscosity on melting, chromaticity, triboelectric chargeability and optical toner concentration detection characteristic. Because of the strict regulation of these various parameters, the resultant multi-color toner or developer system shows excellent performances at every stage of multi-color electrophotography including development, transfer and fixing (color-mixing) for a long period of successive copying.

대표청구항 ▼

A yellow developer for developing electrostatic latent images comprising: (1a) a yellow toner composition containing a yellow toner which in turn contains at least a binder resin and a yellow colorant, and a hydrophobic silica fine powder, and (2a) a ferrite carrier coated with a mixture of a fluorine-containing resin and a styrenic resin in a weight ratio of 9:10 to 20:80, wherein the binder resin comprises a styrene-acrylic acid ester resin, a styrene-methacrylic acid ester resin or a polyester resin, the ferrite carrier has an average particle size of 30 to 65 microns, and the ferrite carrier is coated with 0.01 to 5 wt. % based on the carrier of the mixture of the fluorine-containing resin and a the styrene type resin; the yellow toner having a volume-average particle size of 11.0 to 14.0 microns containing 30% by number or less of particles having sizes below 6.35 microns and containing 9% by weight or less of particles having sizes above 20.2 microns; the yellow toner composition having an agglomeration degree of 25% or below and an apparent density of 0.2 to 1.5 g/cm3; the yellow toner having an apparent viscosity at 100°C. of 104 to 5×105 poise, an apparent viscosity at 90°C. of 5×104 to 5×106 poise, a DSC heat-absorption peak at 58°to 72°C., and a gloss of 5.0% or higher; the yellow toner containing 0.5 to 7.0 wt. parts of the yellow colorant per 100 wt. parts of binder resin. the yellow toner having chromatically values of a*=-6.5 to -26.5, b*=73.0 to 93.0, and L*=77.0 to 97.0; the yellow toner showing a triboelectric charge of -5 to -20 micro-C/g with respect to the ferrite carrier coated with the mixture of the fluorine-containing resin and the styrenic resin containing 70 wt. % or more of carrier particles having sizes of 250 mesh-pass and 350 mesh-on; and the yellow toner having a spectral reflectance of 60% or more in an infrared region of 900 to 1000 nm. A yellow developer according to claim 1, wherein the yellow colorant is a colorant selected from the group consisting of C.I. Pigment Yellow 17, C.I. Pigment Yellow 15, C.I. Pigment Yellow 13, C.I. Pigment Yellow 14 and C.I. Pigment Yellow 12.

이 특허를 인용한 특허 (20)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
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연합인증

Color toner and two-component developer containing same 원문보기

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Color toner and two-component developer containing same 원문보기

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이 특허를 인용한 특허 (20)

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