Patents by Inventor Shunquan Zhu
Shunquan Zhu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11179822Abstract: A polishing pad, a polyurethane polishing layer and a preparation method thereof are provided, belonging to the technical field of polishing in chemical-mechanical planarization treatment. The polyurethane polishing layer having a coefficient of thermal expansion of 100-200 ppm/° C. comprises a reaction product produced by reacting of multiple components. The multiple components include an isocyanate-terminated prepolymer, a hollow microsphere polymer and a curing agent composition. The curing agent composition includes 5-55 wt % of an aliphatic diamine composition, 0-8 wt % of a polyamine composition and 40-90 wt % of an aromatic bifunctional composition. The polyurethane polishing layer has a density of 0.6-1.1 g/cm3, a Shore hardness of 45-70D and an elongation at break of 50-450%. The polyurethane polishing layer is prepared by a simple process with low cost and energy consumption.Type: GrantFiled: August 31, 2018Date of Patent: November 23, 2021Assignee: HUBEI DINGHUI MICROELECTRONICS MATERIALS CO., LTDInventors: Shunquan Zhu, Yijie Luo, Min Liu, Jiping Zhang, Liyuan Che
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Publication number: 20200215661Abstract: A polishing pad, a polyurethane polishing layer and a preparation method thereof are provided, belonging to the technical field of polishing in chemical-mechanical planarization treatment. The polyurethane polishing layer having a coefficient of thermal expansion of 100-200 ppm/° C. comprises a reaction product produced by reacting of multiple components. The multiple components include an isocyanate-terminated prepolymer, a hollow microsphere polymer and a curing agent composition. The curing agent composition includes 5-55 wt % of an aliphatic diamine composition, 0-8 wt % of a polyamine composition and 40-90 wt % of an aromatic bifunctional composition. The polyurethane polishing layer has a density of 0.6-1.1 g/cm3, a Shore hardness of 45-70D and an elongation at break of 50-450%. The polyurethane polishing layer is prepared by a simple process with low cost and energy consumption.Type: ApplicationFiled: August 31, 2018Publication date: July 9, 2020Applicant: HUBEI DINGHUI MICROELECTRONICS MATERIALS CO., LTDInventors: Shunquan ZHU, Yijie LUO, Min LIU, Jiping ZHANG, Liyuan CHE
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Patent number: 10414025Abstract: A weather-resistant polishing pad, including an upper layer operating for polishing, a buffer layer, and a transparent base. The buffer layer is disposed between the upper layer and the transparent base, and the upper layer, the buffer layer, and the transparent base are bonded via a pressure sensitive adhesive or an adhesive agent. The upper layer includes a weather-resistant polyurethane prepolymer, a curing agent, and a functional filler. The polyurethane prepolymer is a polymerization product of polyol and polyfunctional isocyanate. The polyfunctional isocyanate includes a first isocyanate containing no benzene ring, or the first isocyanate having an isocyanato group and a benzene group, and the isocyanato group and the benzene group are connected indirectly.Type: GrantFiled: August 10, 2016Date of Patent: September 17, 2019Assignee: HUBEI DINGLONG CO., LTD.Inventors: Shunquan Zhu, Lili Mei, Yunfeng Li
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Publication number: 20170043451Abstract: A weather-resistant polishing pad, including an upper layer operating for polishing, a buffer layer, and a transparent base. The buffer layer is disposed between the upper layer and the transparent base, and the upper layer, the buffer layer, and the transparent base are bonded via a pressure sensitive adhesive or an adhesive agent. The upper layer includes a weather-resistant polyurethane prepolymer, a curing agent, and a functional filler. The polyurethane prepolymer is a polymerization product of polyol and polyfunctional isocyanate. The polyfunctional isocyanate includes a first isocyanate containing no benzene ring, or the first isocyanate having an isocyanato group and a benzene group, and the isocyanato group and the benzene group are connected indirectly.Type: ApplicationFiled: August 10, 2016Publication date: February 16, 2017Inventors: Shunquan ZHU, Lili MEI, Yunfeng LI
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Patent number: 9012121Abstract: A method for preparing a colored toner. The method includes: 1) providing surface-treated colorant, polymerizing the colorant by atom transfer radical polymerization (ATRP) to produce polymer-grafted colorant particles and dispersing the colorant particles in an aqueous solution including a surfactant to yield a first emulsion; 2) providing surface-treated wax, polymerizing the wax by ATRP to produce polymer-grafted wax particles, and dispersing the wax particles in the aqueous solution including the surfactant to yield a second emulsion; and 3) agglutinating the first emulsion and the second emulsion.Type: GrantFiled: March 18, 2013Date of Patent: April 21, 2015Assignee: Hubei Dinglong Chemical Co., Ltd.Inventors: Shunquan Zhu, Guilin Xiao
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Patent number: 8822119Abstract: A two-component developer including at least a toner and a carrier. The toner includes a coloring particle prepared by agglutinating and fusing a resin particle having colorants and a resin particle having wax, and 0.2-2.0 wt. % hydrophobic silica and 0.01-1.0 wt. % a hydrotalcite-like compound as external additives. A shape coefficient of the toner is 0.93-0.99. The carrier includes at least a magnetic particle coated with a silicone resin layer, with a volume average particle diameter of 20-100 ?m.Type: GrantFiled: July 8, 2011Date of Patent: September 2, 2014Assignee: Hubei Dinglong Chemical Co., Ltd.Inventors: Shunquan Zhu, Yubin Wang
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Publication number: 20130344426Abstract: A method for preparing a colored toner. The method includes: 1) providing surface-treated colorant, polymerizing the colorant by atom transfer radical polymerization (ATRP) to produce polymer-grafted colorant particles and dispersing the colorant particles in an aqueous solution including a surfactant to yield a first emulsion; 2) providing surface-treated wax, polymerizing the wax by ATRP to produce polymer-grafted wax particles, and dispersing the wax particles in the aqueous solution including the surfactant to yield a second emulsion; and 3) agglutinating the first emulsion and the second emulsion.Type: ApplicationFiled: March 18, 2013Publication date: December 26, 2013Applicant: HUBEI DINGLONG CHEMICAL CO., LTD.Inventors: Shunquan ZHU, Guilin XIAO
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Patent number: 8445651Abstract: The invention discloses a method for producing a charge control agent and a toner containing the charge control agent. The preparation method includes the technical proposal that in aqueous medium, an azo compound is reacted with a salicylic acid chromium complex, which is used as a complexing agent to synthesize a specific azo chromium complex. The preparation method is characterized by complex synthesis engineering. The toner of the invention includes a charge control agent obtained from the method described herein. Provided is a method for obtaining a charge control agent and a toner with excellent chargeability in that no flying or fogging is observed, even during image formation at high printing speeds. The toner is relatively free from the influences of variations in the environmental temperature and humidity, which ensures stable image printing with high picture quality for long periods of time.Type: GrantFiled: February 26, 2009Date of Patent: May 21, 2013Assignee: Hubei Dinglong Chemical Co., Ltd.Inventors: Shunquan Zhu, Yubin Wang
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Publication number: 20120295189Abstract: A two-component developer including at least a toner and a carrier. The toner includes a coloring particle prepared by agglutinating and fusing a resin particle having colorants and a resin particle having wax, and 0.2-2.0 wt. % hydrophobic silica and 0.01-1.0 wt. % a hydrotalcite-like compound as external additives. A shape coefficient of the toner is 0.93-0.99. The carrier includes at least a magnetic particle coated with a silicone resin layer, with a volume average particle diameter of 20-100 ?m.Type: ApplicationFiled: July 8, 2011Publication date: November 22, 2012Applicant: HUBEI DINGLONG CHEMICAL CO., LTD.Inventors: Shunquan ZHU, Yubin WANG
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Publication number: 20110165511Abstract: A method for producing an electrostatic image developing toner by: a) adding a free radical polymerizable monomer to an aqueous medium comprising dispersed wax particles containing a colorant, b) polymerizing the free radical polymerizable monomer to yield a resin particle comprising the wax and colorant, and c) agglutinating and fusing the resin particle in the aqueous medium to yield a toner. The resultant toner exhibits uniform particle size, high roll viscosity resistance, and high durability.Type: ApplicationFiled: July 8, 2010Publication date: July 7, 2011Inventors: Shunquan ZHU, Yunfeng LI
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Patent number: 7943688Abstract: This invention teaches a charge control agent and a toner containing such a charge control agent. It solves the problem in current toner processing technique of inadequate electrification, unequal quantity of electricity, spreading and bottom ash. The charge control agent comprising metal complex of tannin acid in which metal atoms have 2 to 4 valences and tannin acid as coordination sub structure. The toners mentioned above at least contains resin, dyestuff and charge control agent of the invention. The powered carbon specializes in excellence in electrification, environment influence retardant. It can obtain stable and high definition image without spreading and bottom ash troubling.Type: GrantFiled: January 10, 2008Date of Patent: May 17, 2011Assignee: Hubei Dinglong Chemical Co., Ltd.Inventors: Delian Yi, Lin Wu, Shunquan Zhu
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Publication number: 20100105884Abstract: A method for producing a charge control agent or a toner containing the charge control agent comprising reacting in aqueous medium an azo compound with a salicylic acid chromium complex.Type: ApplicationFiled: February 26, 2009Publication date: April 29, 2010Applicant: HUBEI DINGLONG CHEMICAL CO., LTD.Inventors: Shunquan ZHU, Yubin WANG
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Publication number: 20090226832Abstract: The invention is related to a toner of static charge image and a method for manufacturing such a toner of static charge image, which solve the problems of existing toner of static charge image, namely easy detachment of colorant, the pollution of carriers and developing sleeves and low durability. For the toner of static charge image obtained by aggregation of at least polymer particles, the polymer particles at least contain polymer particles A with inner wax and polymer particles B with inner colorant. The toner of static charge image of the invention exhibits good effect of fixing characteristics, not causing the pollution of carriers and developing sleeves, and could maintain long-term stable performance.Type: ApplicationFiled: April 30, 2008Publication date: September 10, 2009Applicant: HUBEI DINGLONG CHEMICAL CO., LTD.Inventors: Shunquan ZHU, Xiukui WANG, Yubin WANG
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Publication number: 20080255282Abstract: This invention teaches a charge control agent and a toner containing such a charge control agent. It solves the problem in current toner processing technique of inadequate electrification, unequal quantity of electricity, spreading and bottom ash. The charge control agent comprising metal complex of tannin acid in which metal atoms have 2 to 4 valences and tannin acid as coordination sub structure. The toners mentioned above at least contains resin, dyestuff and charge control agent of the invention. The powered carbon specializes in excellence in electrification, environment influence retardant. It can obtain stable and high definition image without spreading and bottom ash troubling.Type: ApplicationFiled: January 10, 2008Publication date: October 16, 2008Applicant: HUBEI DINGLONG CHEMICAL CO., LTD.Inventors: Delian YI, Lin WU, Shunquan ZHU