An electrophotographic photosensitive member includes: a conductive support; a charge generation layer disposed on the conductive support, the charge generation layer including a charge generating material and a vinyl copolymer, the vinyl copolymer including a structural unit including a chlorine atom, a structural unit including an acyloxy group, and a structural unit including an aromatic polycarboxylic acid structure, a proportion of the structural unit including a chlorine atom to all the structural units being 80% by mass or more, a proportion of the structural unit including an aromatic polycarboxylic acid structure to all the structural units being 0.5% by mass or more; and a charge transport layer disposed on the charge generation layer, the charge transport layer including a charge transporting material and a binder resin.

To provide a water/oil repellent article which presents little burden on the environment, while being excellent in water/oil repellency, washing durability of the water repellency and friction durability of the water repellency; a method for producing such a water/oil repellent article; and a water/oil repellent composition and a water/oil repellent kit to be used for producing such a water/oil repellent article. A water/oil repellent article that comprises a substrate and, as adhered to the surface of the substrate, a fluorinated polymer having structural units based on monomer (a) having a C.sub.1-6 perfluoroalkyl group, and a specific fluorinated ether compound; a method for producing the water/oil repellent article, which comprises letting the fluorinated polymer and fluorinated ether compound be adhered to the substrate; a water/oil repellent composition which comprises the fluorinated polymer and fluorinated ether compound; and a water/oil repellent kit which comprises a first container accommodating a first liquid containing the fluorinated polymer and a second container accommodating a second liquid containing the fluorinated ether compound.

To provide a water/oil repellent article which presents little burden on the environment, while being excellent in water/oil repellency, washing durability of the water repellency and friction durability of the water repellency; a method for producing such a water/oil repellent article; and a water/oil repellent composition and a water/oil repellent kit to be used for producing such a water/oil repellent article. A water/oil repellent article that comprises a substrate and, as adhered to the surface of the substrate, a fluorinated polymer having structural units based on monomer (a) having a C.sub.1-6 perfluoroalkyl group, and a specific fluorinated ether compound; a method for producing the water/oil repellent article, which comprises letting the fluorinated polymer and fluorinated ether compound be adhered to the substrate; a water/oil repellent composition which comprises the fluorinated polymer and fluorinated ether compound; and a water/oil repellent kit which comprises a first container accommodating a first liquid containing the fluorinated polymer and a second container accommodating a second liquid containing the fluorinated ether compound.

Disclosed are a copolymerized PVDF resin for lithium battery binders and its preparation method. 300 to 600 parts of deionized water, 0.04 to 0.25 part of a pH buffer regulator, 85 to 99.5 parts of a vinylidene fluoride (VDF) monomer, 0.5 to 15 parts of a comonomer, 0.3 to 3 parts of a metallocene synergist, 0.2 to 1.0 part of an initiator, 0.08 to 0.35 part of a dispersant react at 40 to 65° C., 5.5-8.0 Mpa. At the end of the reaction, the unreacted monomers are recovered, and then the operations of washing, filtering, and drying are carried out to obtain the copolymerized PVDF resin. For the copolymerized PVDF resin for lithium battery binders, the binding of PVDF resin to a positive electrode active material and current collector is improved, and the rotational viscosity of the NMP solution and the preparation and dispersion requirements for PVDF resin slurry are reduced.

Disclosed are a copolymerized PVDF resin for lithium battery binders and its preparation method. 300 to 600 parts of deionized water, 0.04 to 0.25 part of a pH buffer regulator, 85 to 99.5 parts of a vinylidene fluoride (VDF) monomer, 0.5 to 15 parts of a comonomer, 0.3 to 3 parts of a metallocene synergist, 0.2 to 1.0 part of an initiator, 0.08 to 0.35 part of a dispersant react at 40 to 65° C., 5.5-8.0 Mpa. At the end of the reaction, the unreacted monomers are recovered, and then the operations of washing, filtering, and drying are carried out to obtain the copolymerized PVDF resin. For the copolymerized PVDF resin for lithium battery binders, the binding of PVDF resin to a positive electrode active material and current collector is improved, and the rotational viscosity of the NMP solution and the preparation and dispersion requirements for PVDF resin slurry are reduced.

A husk plastic composite comprises a composition including: PVC 10˜20 wt %; vinyl chloride/vinyl acetate (VC/VAC) copolymer 10˜30 wt %; styrene-acrylonitrile copolymer (SAN) 1˜5 wt %; chlorinated polyethylene (CPE) 1˜5 wt %; rice husk powder 10˜40 wt %; inorganic filler 10˜40 wt %; internal lubricant 0.1˜1 wt %; external lubricant 0.1˜1 wt %, and heat stabilizer 1˜5 wt %. The VC/VAC copolymer in the husk plastic composition provided by the present invention can allow the composition to be processed by relatively lower processing temperature to save energy consumption. It will also prevent the husk powder from being burnt or decomposed due to high temperature during the heating process to allow this natural material being added in a large amount in the composition. The present invention can reduce the amount of PVC through a large amount of filling additives but still maintain in good product mechanical properties. The particle size of the husk is preferably in the range of 0.10˜0.60 mm for better hardness, stiffness and wood-like texture in the final product.

A husk plastic composite comprises a composition including: PVC 10˜20 wt %; vinyl chloride/vinyl acetate (VC/VAC) copolymer 10˜30 wt %; styrene-acrylonitrile copolymer (SAN) 1˜5 wt %; chlorinated polyethylene (CPE) 1˜5 wt %; rice husk powder 10˜40 wt %; inorganic filler 10˜40 wt %; internal lubricant 0.1˜1 wt %; external lubricant 0.1˜1 wt %, and heat stabilizer 1˜5 wt %. The VC/VAC copolymer in the husk plastic composition provided by the present invention can allow the composition to be processed by relatively lower processing temperature to save energy consumption. It will also prevent the husk powder from being burnt or decomposed due to high temperature during the heating process to allow this natural material being added in a large amount in the composition. The present invention can reduce the amount of PVC through a large amount of filling additives but still maintain in good product mechanical properties. The particle size of the husk is preferably in the range of 0.10˜0.60 mm for better hardness, stiffness and wood-like texture in the final product.

Provided is a method of preparing a vinyl chloride-acrylic copolymer latex.

Specifically, in one embodiment of the present invention, provided is a method of preparing a latex including vinyl chloride-acrylic copolymer particles with a high degree of polymerization and high molecular weight by performing an emulsion polymerization of a vinyl chloride monomer and an acrylic monomer in the presence of an aqueous dispersion medium and an emulsifier while optimizing a feeding mode of the monomers and the emulsifier.

Provided is a method of preparing a vinyl chloride-acrylic copolymer latex.

Specifically, in one embodiment of the present invention, provided is a method of preparing a latex including vinyl chloride-acrylic copolymer particles with a high degree of polymerization and high molecular weight by performing an emulsion polymerization of a vinyl chloride monomer and an acrylic monomer in the presence of an aqueous dispersion medium and an emulsifier while optimizing a feeding mode of the monomers and the emulsifier.

Provided is a method of preparing a vinyl chloride-acrylic copolymer latex.

Specifically, in one embodiment of the present invention, provided is a method of preparing a latex including vinyl chloride-acrylic copolymer particles with a high degree of polymerization and high molecular weight by performing an emulsion polymerization of a vinyl chloride monomer and an acrylic monomer in the presence of an aqueous dispersion medium and an emulsifier while optimizing a feeding mode of the monomers and the emulsifier.