Preparation method of a polyester particle dispersion and polyester particle dispersion prepared by the same
First Claim
1. A preparation method of a polyester particle dispersion, the method comprising:
- under predetermined depolymerization conditions, mixing a polyester resin, a resin dissolvent and a polycondensation catalyst to depolymerize the polyester resin to form a first reaction mixture;
adding a first monomer to the first reaction mixture to form a second reaction mixture;
under predetermined polymerization conditions, adding a second monomer to the second reaction mixture to polymerize the depolymerized polyester resin with the first and second monomers to form a polymerized reaction product;
adding a neutralizing agent to neutralize the polymerized reaction product and form a neutralized mixture;
adding a reverse-neutralizing agent to reverse neutralize the neutralized mixture and form a reverse neutralized mixture; and
adding a mixture of an anionic surfactant and a nonionic surfactant to the reverse-neutralized mixture.
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Abstract
A preparation method of a polyester particle dispersion includes: under predetermined depolymerization conditions, mixing a polyester binder resin, a resin dissolvent and a polycondensation catalyst to depolymerize the polyester resin and form a first reaction mixture; adding a first monomer to the first reaction mixture to form a second reaction mixture; under predetermined polymerization conditions, adding a second monomer to the second reaction mixture to polymerize the depolymerized polyester resin and form a third reaction mixture; adding a neutralizing agent to neutralize the polymerized reaction product of the third reaction mixture; (e) adding a reverse-neutralizing agent to reverse neutralize the neutralized mixture; and adding a mixture of an anionic surfactant and a nonionic surfactant to the reverse-neutralized mixture.
51 Citations
32 Claims
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1. A preparation method of a polyester particle dispersion, the method comprising:
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under predetermined depolymerization conditions, mixing a polyester resin, a resin dissolvent and a polycondensation catalyst to depolymerize the polyester resin to form a first reaction mixture;
adding a first monomer to the first reaction mixture to form a second reaction mixture;
under predetermined polymerization conditions, adding a second monomer to the second reaction mixture to polymerize the depolymerized polyester resin with the first and second monomers to form a polymerized reaction product;
adding a neutralizing agent to neutralize the polymerized reaction product and form a neutralized mixture;
adding a reverse-neutralizing agent to reverse neutralize the neutralized mixture and form a reverse neutralized mixture; and
adding a mixture of an anionic surfactant and a nonionic surfactant to the reverse-neutralized mixture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of preparing polyester resin particles for a dry toner, comprising:
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mixing a polyester binder resin, a resin dissolvent and a polycondensation catalyst to form a mixture to depolymerize the polyester resin, stirring at approximately 150-350 rpm and reacting at a temperature between 235°
C. and 245°
C. for a predetermined period of time until the mixture becomes transparent;
cooling the mixture to a predetermined temperature in a temperature range between 100°
C. and 200°
C. and adding a first monomer;
performing a secondary depolymerization reaction by heating the mixture with the first monomer at approximately 235°
C. to 245°
C. for a predetermined period of time;
forming a polycondensed product by adding a second monomer to the secondary depolymerization reaction and continuing to heat at approximately 235°
C. to 245°
C. for a predetermined period of time;
cooling the polycondensed product to a predetermined temperature in a temperature range between 50°
C. and 100°
C. and adding a basic solution to neutralize the polycondensed product and stirring for less than an hour at about 300-500 rpm; and
adding, to the neutralized polycondensed product, a mixture of an anionic surfactant and a nonionic surfactant, a predetermined amount of acid, and a predetermined amount of distilled water and stirring in a temperature range of 15°
C. to 35°
C. to prepare a dispersion of particles having a predetermined volume average particle diameter. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification