Super low melt and ultra low melt toners containing crystalline sulfonated polyester
A technology of sulfonated polyester and toner, which is applied in the field of toner and can solve problems such as low projection efficiency
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Embodiment 1
[0059] A crystalline linear sulfonated polyester resin consisting of 0.549 parts of sebacic acid, 0.051 parts of lithium sulfo-isophthalate, and 0.400 parts of ethylene glycol was prepared as follows. Into a two liter Hoppes reactor equipped with a heated bottom discharge valve, a high viscosity twin turbine agitator and a distillation receiver with a cold water condenser was charged 900 grams of sebacic acid, 84 grams of lithium dimethylsulfoisophthalic acid Formic acid, 655.2 grams of ethylene glycol and 1.5 grams of butyltin oxide hydroxide as catalyst. The reactor was stirred and heated to 190°C for 3 hours, then to 210°C within one hour, after which the pressure was slowly reduced from atmospheric pressure to about 260 Torr over one hour, and then to 5 Torr over two hours, The pressure was then further reduced to about 1 Torr over 30 minutes. The polymer was discharged via bottom discharge onto a vessel filled with ice water to obtain 1000 grams of 3 mol % sulfonated pol...
Embodiment 2
[0063] 951.27 grams of the 11.0% solids crystalline polyester from Example 1 were blended with 17.2 grams of the above pigment dispersion and 30.8 grams of the 35% solids CARNUBA wax dispersion. To this mixture was added (i) 10 g of a 20% solution of anionic surfactant (1 wt% solids) and 2 g (1.2 wt% solids) of nonionic surfactant (70% active ingredients). The pH of the mixture was measured to be 5.5 by an Orion pH meter. 4% nitric acid was added to the mixture to lower the pH to about 4.0 while shearing at 5000 rpm. Then add polyaluminum chloride (PAC) solution (3g PAC / 25g HNO 3 ), thereby increasing the viscosity of the blend. 200 g of distilled water (DIW) was added to reduce the viscosity, allowing the blend to be controlled for shearing. The mixture was then heated to 55°C and allowed to stir for 1 h, then warmed to 65°C in 2°C increments in stages. The particle size obtained was 7.3 microns. The temperature was then slowly increased to 72°C (above the melting point ...
Embodiment 3
[0066] 951.27 grams of the 11.0% solids crystalline polyester from Example 1 were blended with 17.2 grams of the above pigment dispersion and 30.8 grams of the 35% solids CARNUBA wax dispersion. To this mixture was added (i) 15g of a 20% solution of anionic surfactant (1 wt% solids) and 2.5g (1.2 wt% solids) of nonionic surfactant (70% active ingredients). The pH of the mixture was measured to be 5.5 by an Orion pH meter. 4% nitric acid was added to the mixture to lower the pH to about 4.0 while shearing at 5000 rpm. Then add polyaluminum chloride (PAC) solution (2.5g PAC / 25g HNO 3 ), thereby increasing the viscosity of the blend. 200 g of distilled water (DIW) was added to reduce the viscosity, allowing the blend to be controlled for shearing. The mixture was then heated to 55°C and allowed to stir for 1 hr, then ramped to 65°C in 2°C increments in stages. The particle size obtained was 10.0 microns. The temperature was then slowly increased to 72°C (above the melting po...
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Abstract
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