Toner compositions and processes for making same
First Claim
Patent Images
1. A toner composition comprising:
- a branched amorphous polyester resin; and
a crystalline polyester resin;
wherein the toner composition possesses a Newtonian loss modulus (G″
) of about 60,000 to about 120,000 Pascal at a temperature of about 65°
C. to about 80°
C. at a shear rate of about 0.05 to about 0.5 hertz and a G″
of about 30 to about 400 Pascal at a temperature of about 150°
C. to about 165°
C. at a shear rate of about 0.05 to about 0.5 hertz; and
wherein the toner composition possesses a storage modulus (G′
) of about 40,000 to about 90,000 Pascal at a temperature of about 65°
C. to about 80°
C. at a shear rate of about 0.05 to about 0.5 hertz and a G′
of about 10 to about 130 Pascal at a temperature of about 150°
C. to about 165 °
C. at a shear rate of about 0.05 to about 0.5 hertz.
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Abstract
A toner composition is provider including a branched amorphous polyester resin and a crystalline polyester resin, wherein the toner possesses rheological properties yielding desired characteristics.
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Citations
30 Claims
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1. A toner composition comprising:
-
a branched amorphous polyester resin; and
a crystalline polyester resin;
wherein the toner composition possesses a Newtonian loss modulus (G″
) of about 60,000 to about 120,000 Pascal at a temperature of about 65°
C. to about 80°
C. at a shear rate of about 0.05 to about 0.5 hertz and a G″
of about 30 to about 400 Pascal at a temperature of about 150°
C. to about 165°
C. at a shear rate of about 0.05 to about 0.5 hertz; and
wherein the toner composition possesses a storage modulus (G′
) of about 40,000 to about 90,000 Pascal at a temperature of about 65°
C. to about 80°
C. at a shear rate of about 0.05 to about 0.5 hertz and a G′
of about 10 to about 130 Pascal at a temperature of about 150°
C. to about 165 °
C. at a shear rate of about 0.05 to about 0.5 hertz. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An imaging method comprising:
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forming an image on an electrostatic latent image carrier; and
developing the image using a toner composition;
wherein the toner composition possesses a Newtonian loss modulus (G″
) of about 60,000 to about 120,000 Pascal at a temperature of about 65°
C. to about 80°
C. at a shear rate of about 0.05 to about 0.5 hertz and a G″
of about 30 to about 400 Pascal at a temperature of about 150°
C. to about 165°
C. at a shear rate of about 0.05 to about 0.5 hertz; and
wherein the toner composition possesses a storage modulus (G′
) of about 40,000 to about 90,000 Pascal at a temperature of about 65°
C. to about 80°
C. at a shear rate of about 0.05 to about 0.5 hertz and a G′
of about 10 to about 130 Pascal at a temperature of about 150°
C. to about 165 °
C. at a shear rate of about 0.05 to about 0.5 hertz.
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19. An electrophotographic developer, comprising:
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a carrier;
a branched amorphous polyester resin and a crystalline polyester resin forming a toner composition wherein the toner composition possesses a Newtonian loss modulus (G″
) of about 60,000 to about 120,000 Pascal at a temperature of about 65°
C. to about 80°
C. at a shear rate of about 0.05 to about 0.5 hertz and a G″
of about 30 to about 400 Pascal at a temperature of about 150°
C. to about 165°
C. at a shear rate of about 0.05 to about 0.5 hertz; and
wherein the toner composition possesses a storage modulus (G′
) of about 40,000 to about 90,000 Pascal at a temperature of about 65°
C. to about 80°
C. at a shear rate of about 0.05 to about 0.5 hertz and a G′
of about 10 to about 130 Pascal at a temperature of about 150°
C. to about 165 °
C. at a shear rate of about 0.05 to about 0.5 hertz.
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20. A xerographic apparatus comprising:
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a charging component;
a photoreceptor component;
a development component;
a transfer component; and
a cleaning component;
wherein the developer contains a toner composition comprising a branched amorphous polyester resin and a crystalline polyester resin;
wherein the toner composition possesses a Newtonian loss modulus (G″
) of about 60,000 to about 120,000 Pascal at a temperature of about 65°
C. to about 80°
C. at a shear rate of about 0.05 to about 0.5 hertz and a G″
of about 30 to about 400 Pascal at a temperature of about 150°
C. to about 165°
C. at a shear rate of about 0.05 to about 0.5 hertz; and
wherein the toner composition possesses a storage modulus (G′
) of about 40,000 to about 90,000 Pascal at a temperature of about 65°
C. to about 80°
C. at a shear rate of about 0.05 to about 0.5 hertz and a G′
of about 10 to about 130 Pascal at a temperature of about 150°
C. to about 165 °
C. at a shear rate of about 0.05 to about 0.5 hertz.
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21. A toner composition comprising:
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a branched amorphous polyester resin; and
a crystalline polyester resin;
wherein the toner composition has a Newtonian loss modulus (G″
) of about 60,000 to about 120,000 Pascal at a temperature of about 65°
C. to about 80°
C. at a shear rate of about 0.05 to about 0.5 hertz; and
wherein the toner composition has a storage modulus (G′
) of about 40,000 to about 90,000 Pascal at a temperature of about 65°
C. to about 80°
C. at a shear rate of about 0.05 to about 0.5 hertz. - View Dependent Claims (22, 23, 24, 25)
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26. A toner composition comprising:
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a branched amorphous polyester resin; and
a crystalline polyester resin;
wherein the toner composition has a Newtonian loss modulus (G″
) of about 30 to about 400 Pascal at a temperature of about 150°
C. to about 165°
C. at a shear rate of about 0.05 to about 0.5 hertz; and
wherein the toner composition has a storage modulus (G′
) of about 10 to about 130 Pascal at a temperature of about 150°
C. to about 165 °
C. at a shear rate of about 0.05 to about 0.5 hertz. - View Dependent Claims (27, 28, 29, 30)
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Specification