The present disclosure provides a method for preparing a polymerization initiator composition, including (a) a step of mixing water and a water-soluble initiator to prepare an aqueous initiator solution having a concentration of 1 to 10%; and (b) a step of activating the aqueous initiator solution, wherein the step of activating is performed by (b-1) a step of heat treating the aqueous initiator solution for 0.5 to 4.5 hours at a temperature of 48 to 62 C.; and (b-2) a step of treating the aqueous initiator solution to achieve pH of 1 to 7, where the steps above are performed in no particular order.

The present disclosure provides a method for preparing a polymerization initiator composition, including (a) a step of mixing water and a water-soluble initiator to prepare an aqueous initiator solution having a concentration of 1 to 10%; and (b) a step of activating the aqueous initiator solution, wherein the step of activating is performed by (b-1) a step of heat treating the aqueous initiator solution for 0.5 to 4.5 hours at a temperature of 48 to 62 C.; and (b-2) a step of treating the aqueous initiator solution to achieve pH of 1 to 7, where the steps above are performed in no particular order.

The present invention relates process for preparing an aqueous polymer dispersion by radically initiated aqueous emulsion polymerization, which comprises polymerizing, in an aqueous polymerization medium a) in a first polymerization stage 0.5 and 15 wt % of at least one ,-monoethylenically unsaturated C.sub.3 to C.sub.6 monocarboxylic or dicarboxylic acid (monomers A1), 5 and 40 wt % of at least one monoethylenically unsaturated compound having at least one hydroxyl group (monomers B1), 0-40 wt % of carboxyl-free (meth)acrylic esters with a cycloaliphatic structure (monomers C1), 15 and 94.5 wt % of at least one ethylenically unsaturated compound which is different from the monomers A1, B1 and C1 (monomers D1), the amounts of the monomers A1 to D1 adding up to 100 wt %, in the presence of at least one radical initiator and at least one chain transfer agent, and also, optionally, in the presence of a dispersing assistant, with the provisos that the amount of chain transfer agent is selected such that the polymer 1 obtained from the first polymerization stage has a weight-average molecular weight in the range of 5000 and 40000 g/mol, the nature and amounts of the monomers A1 to D1 are selected such that the resulting polymer 1 has a glass transition temperature Tg.sup.1 as measured to DIN EN ISO 11357-2 (2013 September) 15 C., and thereafter polymerizing, in the presence of the polymer 1 b) in a second polymerization stage 0 and 1.0 wt % of at least one ,-monoethylenically unsaturated C.sub.3 to C.sub.6 monocarboxylic or dicarboxylic acid (monomers A2), 0.1 and 40 wt % of at least one monoethylenically unsaturated compound having at least one hydroxyl group (monomers B2), 0-40 wt % of carboxyl-free (meth)acrylic esters with a cycloaliphatic structure (monomers C2) 30 and 99.9 wt % of at least one ethylenically unsaturated compound which is different from the monomers A2, B2 and C2 (monomers D2), the amounts of the monomers A2 to D2 adding up to 100 wt %, in the presence of at least one radical initiator and at least one chain transfer agent, and also, optionally, in the presence of a dispersing assistant, with the provisos that the weight ratio of the sum of the total amounts of monomers A1 to D1 (total monomer amount 1) to the sum of the total amounts of monomers A2 to D2 (total monomer amount 2) is in the range 25:75 to 50:50, the amount of chain transfer agent in the second polymerization stage is selected such that the overall polymer obtained after the second polymerization stage has a weight-average molecular weight 5000 and 75000/mol, and the amount of the dispersing assistant is 3.0 wt %, based on the sum of total monomer amount 1 and total monomer a

The present invention relates to a thermoplastic polymer, a method of preparing the thermoplastic polymer, and a thermoplastic polymer composition including the thermoplastic polymer. More particularly, the present invention provides a thermoplastic polymer reducing the amount of gas generated in high-temperature extrusion and injection-molding processes to improve surface gloss and definition of a resin and provides superior latex stability when a chain-type fatty acid or a salt thereof having a specific branch group or functional group is included as an emulsifier during shell polymerization of a thermoplastic polymer including a core-shell structure, a method of preparing the thermoplastic polymer, and a thermoplastic polymer composition including the thermoplastic polymer.

The present invention relates to a thermoplastic polymer, a method of preparing the thermoplastic polymer, and a thermoplastic polymer composition including the thermoplastic polymer. More particularly, the present invention provides a thermoplastic polymer reducing the amount of gas generated in high-temperature extrusion and injection-molding processes to improve surface gloss and definition of a resin and provides superior latex stability when a chain-type fatty acid or a salt thereof having a specific branch group or functional group is included as an emulsifier during shell polymerization of a thermoplastic polymer including a core-shell structure, a method of preparing the thermoplastic polymer, and a thermoplastic polymer composition including the thermoplastic polymer.

The present invention relates to a process for preparation of superabsorbent polymer with high fluid absorptivity. The present invention also relates to a composition comprising said superabsorbent polymer and their use for absorbing aqueous fluids, for example in the agricultural industry.

The present disclosure relates to a composition for preparing a vinyl chloride-based polymer and a method of preparing a vinyl chloride-based polymer using the same, and provides the composition giving excellent productivity for preparing a vinyl chloride-based polymer includes while maintaining excellent foaming and viscosity properties of a plastisol including the prepared vinyl chloride-based polymer, by including a pH regulator composed of a carbonate-based metal salt, and a transition metal catalyst in the composition, and controlling an amount of the transition metal catalyst, and controlling an amount of a reducing agent such that a trace amount or none of the reducing agent is included, and the method of preparing a vinyl chloride-based polymer using the same.

The present disclosure relates to a composition for preparing a vinyl chloride-based polymer and a method of preparing a vinyl chloride-based polymer using the same, and provides the composition giving excellent productivity for preparing a vinyl chloride-based polymer includes while maintaining excellent foaming and viscosity properties of a plastisol including the prepared vinyl chloride-based polymer, by including a pH regulator composed of a carbonate-based metal salt, and a transition metal catalyst in the composition, and controlling an amount of the transition metal catalyst, and controlling an amount of a reducing agent such that a trace amount or none of the reducing agent is included, and the method of preparing a vinyl chloride-based polymer using the same.

The present invention provides a method for preparing an anode slurry used in a lithium ion battery. The method includes the following steps: providing at least one anode active material, at least one conductive agent, at least one monomer or a prepolymer and at least one solvent. Mixing the anode active material, the conductive agent and the monomer or the prepolymer with the solvent; dispersing uniformly to form a mixture. Adding an initiator into the mixture; polymerizing the monomer or the prepolymer at a certain temperature; and yielding the anode slurry. Besides, the present invention also provides an anode slurry prepared by the above method, and an anode plate prepared by the anode slurry, and a lithium ion battery including the anode plate.

The present invention provides a method for preparing an anode slurry used in a lithium ion battery. The method includes the following steps: providing at least one anode active material, at least one conductive agent, at least one monomer or a prepolymer and at least one solvent. Mixing the anode active material, the conductive agent and the monomer or the prepolymer with the solvent; dispersing uniformly to form a mixture. Adding an initiator into the mixture; polymerizing the monomer or the prepolymer at a certain temperature; and yielding the anode slurry. Besides, the present invention also provides an anode slurry prepared by the above method, and an anode plate prepared by the anode slurry, and a lithium ion battery including the anode plate.