A method of preparing a graft copolymer includes a step of performing coagulation by adding an acid coagulant to 100 parts by weight (based on solids) of graft copolymer latex prepared by graft-polymerizing an aromatic vinyl compound and a vinyl cyanide compound onto conjugated diene rubber latex; and a step of performing coagulation once more by adding a salt coagulant thereto. In a resulting graft copolymer, coagulation efficiency may be improved and the gloss of the prepared graft copolymer may be increased. In addition, since a b-value measured using a Hunter lab colorimeter and a b-value measured after being left at 250° C. for 15 minutes are low, the graft copolymer may have excellent color characteristics. In addition, since heating loss is low and scorch time is long, the graft copolymer may have excellent processing characteristics.

A method of preparing a graft copolymer includes a step of performing coagulation by adding an acid coagulant to 100 parts by weight (based on solids) of graft copolymer latex prepared by graft-polymerizing an aromatic vinyl compound and a vinyl cyanide compound onto conjugated diene rubber latex; and a step of performing coagulation once more by adding a salt coagulant thereto. In a resulting graft copolymer, coagulation efficiency may be improved and the gloss of the prepared graft copolymer may be increased. In addition, since a b-value measured using a Hunter lab colorimeter and a b-value measured after being left at 250° C. for 15 minutes are low, the graft copolymer may have excellent color characteristics. In addition, since heating loss is low and scorch time is long, the graft copolymer may have excellent processing characteristics.

Free-standing non-fouling polymers and polymeric compositions, monomers and macromonomers for making the polymers and polymeric compositions, objects made from the polymers and polymeric compositions, and methods for making and using the polymers and polymeric compositions

Free-standing non-fouling polymers and polymeric compositions, monomers and macromonomers for making the polymers and polymeric compositions, objects made from the polymers and polymeric compositions, and methods for making and using the polymers and polymeric compositions

Free-standing non-fouling polymers and polymeric compositions, monomers and macromonomers for making the polymers and polymeric compositions, objects made from the polymers and polymeric compositions, and methods for making and using the polymers and polymeric compositions

A method for producing a polymer from a first component and a second component using a reactor (50) offers technical advantages, wherein reaction heat produced in the reactor (50) is discharged via a boiling cooler (40) by supplying gaseous vapors produced in the reactor (50) to the boiling cooler (40). A product flow containing condensed vapors is returned to the reactor (50) from the boiling cooler (40) via a separation vessel (60), and an aqueous phase is separated from the product flow in the separation vessel (60). A system is provided for producing a polymer from a first component and a second component, comprising a reactor (50) and a boiling cooler (40) for discharging reaction heat produced in the reactor (50). A separation vessel (60) is arranged between the boiling cooler (40) and the reactor (50) such that a product flow containing condensed vapors is returned to the reactor (50) from the boiling cooler (40) via the separation vessel (60).

A method for producing a polymer from a first component and a second component using a reactor (50) offers technical advantages, wherein reaction heat produced in the reactor (50) is discharged via a boiling cooler (40) by supplying gaseous vapors produced in the reactor (50) to the boiling cooler (40). A product flow containing condensed vapors is returned to the reactor (50) from the boiling cooler (40) via a separation vessel (60), and an aqueous phase is separated from the product flow in the separation vessel (60). A system is provided for producing a polymer from a first component and a second component, comprising a reactor (50) and a boiling cooler (40) for discharging reaction heat produced in the reactor (50). A separation vessel (60) is arranged between the boiling cooler (40) and the reactor (50) such that a product flow containing condensed vapors is returned to the reactor (50) from the boiling cooler (40) via the separation vessel (60).

Provided is a positive electrode for a secondary battery that can cause a secondary battery to display excellent battery characteristics. The positive electrode for a secondary battery includes a positive electrode mixed material layer and a current collector. The positive electrode mixed material layer contains a positive electrode active material, a conductive material, a polymer A including a nitrogen-containing heterocycle and having a weight-average molecular weight of not less than 300 and not more than 70,000, and a polymer B including a nitrile group. The positive electrode mixed material layer has a degree of nitrogen segregation of 1.4 or less as determined using an electron probe microanalyzer.

Provided is a positive electrode for a secondary battery that can cause a secondary battery to display excellent battery characteristics. The positive electrode for a secondary battery includes a positive electrode mixed material layer and a current collector. The positive electrode mixed material layer contains a positive electrode active material, a conductive material, a polymer A including a nitrogen-containing heterocycle and having a weight-average molecular weight of not less than 300 and not more than 70,000, and a polymer B including a nitrile group. The positive electrode mixed material layer has a degree of nitrogen segregation of 1.4 or less as determined using an electron probe microanalyzer.

Disclosed are a battery binder, a lithium-ion battery negative electrode plate and a lithium-ion battery. The adhesive contains a polymer having both hydrophillic and hydrophobic units. In addition, in the polymer, a medium-to-low molecular weight polymer is less than 5 wt % or less based on total amount of the polymer, and the molecular weight of the medium-to-low molecular weight polymer is less than 10000. The adhesive has a strong adhesive force, and the preparation method therefor is simple and low cost. Compared with an exiting negative electrode plate adhesive amount of 2.5%-5%, an adhesive amount of 1.5-2% can not only show a higher bonding force, but also the proportion of active material can be increased, thereby increasing the energy density of a battery.