Toner for developing an electrostatic latent image

Details Toner for developing an electrostatic latent image Toner for developing an electrostatic latent image

1996-07-11

1997-06-10

Martin, Roland

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

430111, G03G 9087, G03G 9097

Patent

active

056374330

ABSTRACT:
Disclosed is a toner for developing an electrostatic latent image, comprising a binder resin, a colorant and a releasing agent, wherein said toner has:
(1) a storage modulus (G') having a falling starting temperature of 45.degree. to 65.degree. C., when a visco-modulus of said toner is measured by a rheometer,
(2) a first inclination represented by (1/3).times.(log (.eta.'.sub.121)-log (.eta.'.sub.118)) is -0.065 to -0.035 at 120.degree. C. wherein said log (.eta.'.sub.121) represents a common logarithm of a fusion viscosity (.eta. ) of said toner at 121.degree. C., said log (.eta.'.sub.118) represents a common logarithm of a fusion viscosity (.eta. ) of said toner at 118.degree. C., and said first inclination represented by (1/3).times.(log (.eta.'.sub.121)-log (.eta.'.sub.118)) represents an inclination of a tangent at 120.degree. C., when said logarithm of said fusion viscosity (.eta. ) is plotted as a function of degree of Celsius, and
(3) a second inclination represented by (1/3).times.(log (G'.sub.200)-log (G'.sub.197)) is not less than -0.025 at 200.degree. C., wherein said log (G'.sub.200) represents a common logarithm of said storage modulus (G') at 200.degree. C., said log (G'.sub.197) represents a common logarithm of said storage modulus (G') at 197.degree. C., and said second inclination represented by (1/3).times.(log (G'.sub.200)-log (G'.sub.197)) represents an inclination of a tangent at 200.degree. C., when said logarithm of said storage modulus (G') is plotted as a function of degree of Celsius.

REFERENCES:
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patent: 5225308 (1993-07-01), Sasaki et al.
patent: 5384224 (1995-01-01), Tanikawa et al.
patent: 5478686 (1995-12-01), Kawakami et al.
patent: 5514510 (1996-05-01), Hayakawa
patent: 5547800 (1996-08-01), Nishimori et al.
patent: 5578408 (1996-11-01), Kohtaki et al.

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