Abstract: A core-shell copolymer, a method of making the same, and a thermoplastic resin composition including the same are disclosed herein. In some embodiments, a core-shell copolymer includes a core and a shell surrounding the core, the core includes a conjugated diene-based monomer-derived repeating unit and a phosphate-based cross-linking agent-derived cross-linking part represented by Formula 1, and the shell includes a first alkyl (meth)acrylate monomer-derived repeating unit, a second alkyl (meth)acrylate monomer-derived repeating unit, and a sulfonate-based ionic monomer-derived repeating unit represented by Formula 2. The core is 68 parts to 92 parts and the shell is 8 parts to 32 parts, based on 100 parts of the core-shell copolymer, the core has a swell index of 2.7 to 10.9, the shell includes 1 wt % to 16 wt % of the sulfonate-based ionic monomer-derived repeating unit, and the shell has a weight average molecular weight of 105,000 g/mol to 645,000 g/mol.

Abstract: A method for preparing a core-shell copolymer includes polymerizing a core by polymerizing 70 to 90 parts by weight of a methyl (meth)acrylate monomer and 1 part to 20 parts by weight of a C2-C12 alkyl (meth)acrylate monomer, based on 100 parts by weight of the total content of the monomer; at a point when a polymerization conversion ratio is 70% to 90% in the polymerization of the core, polymerizing the core by adding and polymerizing 1 part to 10 parts by weight of the methyl (meth)acrylate monomer and 0.04 to 0.7 parts by weight of a polyfunctional acrylic cross-linking agent; and polymerizing a core-shell copolymer by adding and polymerizing 1 to 10 parts by weight of the methyl (meth)acrylate monomer and 1 to 10 parts by weight of an aromatic vinyl monomer in the presence of the core.

Abstract: The present invention relates to a coolant heater comprising: a heating element for heating coolant; a first housing for accommodating the heating element; a cover plate for sealing the first housing in which the heating element is accommodated; a temperature fuse provided in an external space formed by coupling the first housing and the cover plate, and disposed to be adjacent to the cover plate; and a second housing for pressing the temperature fuse so as to pressurize the same toward the cover plate, wherein overheat sensing responsiveness of the heating element is improved such that the overheat of the heating element can be prevented, and failure factors in a part in which the temperature fuse is coupled are reduced such that a durability is improved.

Abstract: Disclosed is a graft copolymer, and a graft copolymer including a rubbery polymer, wherein the rubbery polymer includes a conjugated diene-based monomer unit, and one or more compound units selected from the group consisting of compounds represented by Formula 1, wherein the graft copolymer includes an alkyl (meth)acrylate-based monomer unit and an aromatic vinyl-based monomer unit, the content of the one or more compound units selected from the group consisting of the compounds represented by Formula 1 is from 0.1 wt % to 5.0 wt % with respect to the graft copolymer, the alkyl (meth)acrylate-based monomer unit is crosslinked from a crosslinking agent, and a weight average molecular weight of the aromatic vinyl-based monomer unit is from 20,000 g/mol to 100,000 g/mol. Also disclosed is a method for preparing a graft copolymer and a resin composition including same.

Abstract: The present invention relates to a coolant heater. The purpose of the present invention, a coolant heater which effectively heats coolant of a vehicle by means of a heating unit, is to provide a coolant heater having improved sensitivity and responsiveness to over-heating and assured stability by utilizing a temperature fuse to prevent over-heating. Another purpose of the present invention is to provide a coolant heater having enhanced durability of the temperature fuse coupling part by improving the structure by which the temperature fuse is fixed.

Abstract: A vehicular air conditioning system includes an air conditioner case, a blower configured to blow an air to an internal air flow path of the air conditioner case, a microphone provided in the internal air flow path on a downstream side of the blower and configured to detect noise, and a speaker configured to output sound waves having a phase opposite to a phase of the noise detected by the microphone.

Abstract: The present invention relates to a coolant heater. The purpose of the present invention, a coolant heater which effectively heats coolant of a vehicle by means of a heating unit, is to provide a coolant heater having improved sensitivity and responsiveness to over-heating and assured stability by utilizing a temperature fuse to prevent over-heating. Another purpose of the present invention is to provide a coolant heater having enhanced durability of the temperature fuse coupling part by improving the structure by which the temperature fuse is fixed.

Abstract: A vehicular air conditioning system includes an air conditioner case, a blower configured to blow an air to an internal air flow path of the air conditioner case, a microphone provided in the internal air flow path on a downstream side of the blower and configured to detect noise, and a speaker configured to output sound waves having a phase opposite to a phase of the noise detected by the microphone,

Abstract: A core-shell copolymer, a method of making the same, and a thermoplastic resin composition including the same are disclosed herein. In some embodiments, a core-shell copolymer includes a core and a shell surrounding the core, the core includes a conjugated diene-based monomer-derived repeating unit and a phosphate-based cross-linking agent-derived cross-linking part represented by Formula 1, and the shell includes a first alkyl (meth)acrylate monomer-derived repeating unit, a second alkyl (meth)acrylate monomer-derived repeating unit, and a sulfonate-based ionic monomer-derived repeating unit represented by Formula 2. The core is 68 parts to 92 parts and the shell is 8 parts to 32 parts, based on 100 parts of the core-shell copolymer, the core has a swell index of 2.7 to 10.9, the shell includes 1 wt % to 16 wt % of the sulfonate-based ionic monomer-derived repeating unit, and the shell has a weight average molecular weight of 105,000 g/mol to 645,000 g/mol.

Abstract: A method for preparing a core-shell copolymer includes polymerizing a core by polymerizing 70 to 90 parts by weight of a methyl (meth)acrylate monomer and 1 part to 20 parts by weight of a C2-C12 alkyl (meth)acrylate monomer, based on 100 parts by weight of the total content of the monomer; at a point when a polymerization conversion ratio is 70% to 90% in the polymerization of the core, polymerizing the core by adding and polymerizing 1 part to 10 parts by weight of the methyl (meth)acrylate monomer and 0.04 to 0.7 parts by weight of a polyfunctional acrylic cross-linking agent; and polymerizing a core-shell copolymer by adding and polymerizing 1 to 10 parts by weight of the methyl (meth)acrylate monomer and 1 to 10 parts by weight of an aromatic vinyl monomer in the presence of the core.

Abstract: A method for preparing a core-shell copolymer includes: preparing a core by polymerizing a conjugated diene-based monomer and adding an initiator including two or more peroxide-based functional groups when a polymerization conversion rate is 95% or more and less than 100%; and preparing a core-shell copolymer by polymerizing an alkyl (meth)acrylate monomer in the presence of the core and a macro initiator having a weight average molecular weight of 4,000 g/mol to 50,000 g/mol, wherein the initiator is added in an amount of more than 0 parts by weight and less than 2.5 parts by weight based on 100 parts by weight of the conjugated diene-based monomer, and the macro initiator is added in an amount of more than 0 parts by weight and less than 3.5 parts by weight based on 100 parts by weight of the alkyl (meth)acrylate monomer.

Abstract: Provided is a method for preparing an acrylic copolymer, and more specifically, provided are a method for preparing an acrylic copolymer including: i) adding and polymerizing 50 to 80 parts by weight of a methyl (meth)acrylate monomer and 10 to 49 parts by weight of a C2-C12 alkyl (meth)acrylate monomer, based on 100 parts by weight of a total monomer content, in a reactor (S1); and ii) adding and polymerizing 1 to 10 parts by weight of the methyl (meth)acrylate monomer, more than 0.01 part by weight to less than 1 part by weight of an acrylic cross-linking agent, and a surfactant, based on 100 parts by weight of the total monomer content, in which a polymerization conversion ratio of the polymerization in step (S1) is 70% to 90% (S2), an acrylic copolymer prepared therefrom, and a resin composition including the same.

Abstract: The present invention relates to a coolant heater comprising: a heating element for heating coolant; a first housing for accommodating the heating element; a cover plate for sealing the first housing in which the heating element is accommodated; a temperature fuse provided in an external space formed by coupling the first housing and the cover plate, and disposed to be adjacent to the cover plate; and a second housing for pressing the temperature fuse so as to pressurize the same toward the cover plate, wherein overheat sensing responsiveness of the heating element is improved such that the overheat of the heating element can be prevented, and failure factors in a part in which the temperature fuse is coupled are reduced such that a durability is improved.

Abstract: A method for preparing a core-shell copolymer includes: preparing a core by polymerizing a conjugated diene-based monomer and adding an initiator including two or more peroxide-based functional groups when a polymerization conversion rate is 95% or more and less than 100%; and preparing a core-shell copolymer by polymerizing an alkyl (meth)acrylate monomer in the presence of the core and a macro initiator having a weight average molecular weight of 4,000 g/mol to 50,000 g/mol, wherein the initiator is added in an amount of more than 0 parts by weight and less than 2.5 parts by weight based on 100 parts by weight of the conjugated diene-based monomer, and the macro initiator is added in an amount of more than 0 parts by weight and less than 3.5 parts by weight based on 100 parts by weight of the alkyl (meth)acrylate monomer.

Abstract: Provided is a method for preparing an acrylic copolymer, and more specifically, provided are a method for preparing an acrylic copolymer including: i) adding and polymerizing 50 to 80 parts by weight of a methyl (meth)acrylate monomer and 10 to 49 parts by weight of a C2-C12 alkyl (meth) acrylate monomer, based on 100 parts by weight of a total monomer content, in a reactor (S1); and ii) adding and polymerizing 1 to 10 parts by weight of the methyl (meth) acrylate monomer, more than 0.01 part by weight to less than 1 part by weight of an acrylic cross-linking agent, and a surfactant, based on 100 parts by weight of the total monomer content, in which a polymerization conversion ratio of the polymerization in step (S1) is 70% to 90% (S2), an acrylic copolymer prepared therefrom, and a resin composition including the same.

Abstract: The present invention relates to an acrylic processing aid and a vinyl chloride resin composition comprising the same. Specifically, the present invention relates to a core-shell structured acrylic processing aid which can play both roles as a lubricant and a processing aid at the same time by using monomers having a certain composition for the core and shell, respectively, and controlling their specific viscosity, and to a vinyl chloride resin composition comprising the same.

Abstract: The present invention relates to an acrylic processing aid which may enhance the processability and dispersibility of a resin, a method of producing the same, a vinyl chloride-based resin composition including the same, and a vinyl chloride-based resin formed product derived from the vinyl chloride-based resin composition. An acrylic processing aid according to the present invention may be used as a processing aid for a resin (e.g., a vinyl chloride-based resin) to promote gelation of the resin to enhance the processability, thus suppressing generation of fish-eye, and in a forming processing (e.g., a calendar forming), may promote melting of the resin to suppress the generation of air marks and flow marks, thereby enhancing the surface characteristics of the produced resin.

Abstract: The present invention relates to an acrylic processing aid and a vinyl chloride resin composition comprising the same. Specifically, the present invention relates to a core-shell structured acrylic processing aid which can play both roles as a lubricant and a processing aid at the same time by using monomers having a certain composition for the core and shell, respectively, and controlling their specific viscosity, and to a vinyl chloride resin composition comprising the same.

Abstract: The present invention relates to an acrylic processing aid which may enhance the processability and dispersibility of a resin, a method of producing the same, a vinyl chloride-based resin composition including the same, and a vinyl chloride-based resin formed product derived from the vinyl chloride-based resin composition. An acrylic processing aid according to the present invention may be used as a processing aid for a resin (e.g., a vinyl chloride-based resin) to promote gelation of the resin to enhance the processability, thus suppressing generation of fish-eye, and in a forming processing (e.g., a calendar forming), may promote melting of the resin to suppress the generation of air marks and flow marks, thereby enhancing the surface characteristics of the produced resin.

Abstract: There is provided an actuator unit including: a support member supporting a first lens so that the first lens is maintained in a non-contact state with a second lens adjacent thereto; and a piezoelectric member connected to the support member, deforming the support member so that the lenses are movable in an optical axis direction, and including a plurality of piezoelectric elements and a plurality of internal electrodes. The actuator unit configured as described above may improve driving reliability of the lens.