# US 2019/0169336 A1 · Vinyl polymer powder, thermoplastic resin composition, and molded body thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0169336 A1 - Document ID: US20190169336A1 - Status: Published application - Kind: A1 - Application number: 16/249,660 - Filed: 2019-01-16 - Published: 2019-06-06 - Earliest claimed: 2014-03-20 - Assignees: Mitsubishi Chemical Corporation - Applicants: Mitsubishi Chemical Corporation - Inventors: Masahiro UEDA; Shinji MATSUOKA - Web page: https://patentgrep.com/patent/US20190169336A1 ## CPC - C08F 212/08: Styrene - C08J 3/16: by coagulating dispersions {(C08J3/122 takes precedence)} - C08L 25/14: with unsaturated esters - C08L 67/00: Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain (of polyester-amides C08L77/12; of polyester-imides C08L79/08); Compositions of derivatives of such polymers - C08L 69/00: Compositions of polycarbonates; Compositions of derivatives of polycarbonates - C08L 77/00: Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain (of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08); Compositions of derivatives of such polymers - C08L 101/00: Compositions of unspecified macromolecular compounds - C08F 220/1806: {C6-(meth)acrylate, e.g. (cyclo)hexyl (meth)acrylate or phenyl (meth)acrylate} - C08J 2325/14: with unsaturated esters - C08L 33/06: of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical - C08L 77/02: Polyamides derived from omega-amino carboxylic acids or from lactams thereof (C08L77/10 takes precedence) - C08L 77/06: Polyamides derived from polyamines and polycarboxylic acids (C08L77/10 takes precedence) - C08L 77/10: Polyamides derived from aromatically bound amino and carboxyl groups of amino-carboxylic acids or of polyamines and polycarboxylic acids - C08L 2201/54: Aqueous solutions or dispersions - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract This vinyl polymer powder, which contains a vinyl polymer, has a glass transition temperature of at least 0° C. (where if there are a plurality of glass transition points, all of the glass transition temperatures are at least 0° C.), has no greater than 350 ppm of the total content of magnesium ions, calcium ions, aluminum ions, barium ions, and zinc ions, has no greater than 100 ppm of the content of ammonium ions, has an acid number of no greater than 2.5 mgKOH/g, and has a bulk density of 0.10-0.60 g/cm3. ## Claims ### Claim at position 1 1-11. (canceled) ### Claim 12 A method for producing a vinyl polymer powder, the method comprising the following Step (1) and Step (2): Step (1): a step of obtaining a vinyl polymer latex having a glass transition temperature of 0° C. or higher (provided that, when there are a plurality of glass transition points, all of the glass transition temperatures are 0° C. or higher) by subjecting a vinyl monomer to emulsion polymerization in the presence of a non-ionic/anionic emulsifier; and Step (2): a step of preparing a slurry having a pH of 6 or less by coagulating the vinyl polymer latex, then generating a precipitate, and recovering the precipitate as a vinyl polymer powder. ### Claim 13 (depends on 12) The method for producing a vinyl polymer powder according to claim 12, wherein an ionic hydrophilic moiety of the non-ionic/anionic emulsifier is carboxylic acid or a salt thereof, or phosphoric acid or a salt thereof. ### Claim 14 (depends on 12) The method for producing a vinyl polymer powder according to claim 12, wherein the vinyl polymer latex is coagulated using an acid in Step (2). ### Claim 15 (depends on 12) The method for producing a vinyl polymer powder according to claim 12, wherein a pH of the slurry in Step (2) is 4 or less. ### Claim 16 (depends on 12) The method for producing a vinyl polymer powder according to claim 12, wherein the vinyl polymer powder comprises a vinyl polymer, a glass transition temperature of the vinyl polymer is 0° C. or higher (provided that, when there are a plurality of glass transition points, all of the glass transition temperatures are 0° C. or higher), the total content of magnesium ions, calcium ions, aluminum ions, barium ions, and zinc ions in the vinyl polymer powder is 350 ppm or less with respect to the total mass of the vinyl polymer powder, the content of ammonium ions is 100 ppm or less with respect to the total mass of the vinyl polymer powder, an acid value is 2.5 mgKOH/g or less, and a bulk density is 0.10 to 0.60 g/cm3. ### Claim 17 (depends on 12) The method for producing a vinyl polymer powder according to claim 12, wherein free flow property of the vinyl polymer powder as measured by the following method is 15 g/10 sec or more; [Measurement Method for Free Flow Property] a measurement instrument, which includes a seat on which a tray is set, a funnel provided with a shutter at a cylindrical opening thereof which has an inner diameter of an upper part at 8 mm and an inner diameter of a lower part at 20 mm, a support holding the funnel above the seat, and a support rod to which the support is fixed, is placed in a horizontal site; the shutter of the funnel is closed, and 120 cm3 of powder is uniformly put into the funnel; subsequently, the shutter is opened to drop the powder, and immediately, the tray is set on the seat; at the same time of setting the tray, the counting of time starts by using a stopwatch, and after 10 seconds, the tray is removed from the measurement instrument; the tray containing the powder is weighed to obtain the amount of the powder dropped for 10 seconds; and the above measurement is carried out two times, and an average value of the amounts of the powder dropped for 10 seconds is obtained and this value is designated as the free flow property (g/10 sec). ### Claim 18 (depends on 12) The method for producing a vinyl polymer powder according to claim 12, wherein the total content of sodium ions and potassium ions in the vinyl polymer powder is 100 ppm or less with respect to the total mass of the vinyl polymer powder. ### Claim 19 (depends on 12) The method for producing a vinyl polymer powder according to claim 12, wherein the vinyl polymer powder comprises: 0.5 to 99.5% by mass of a (meth)acrylate ester unit which contains an alkyl group having 1 to 4 carbon atoms or an aromatic group in an ester moiety; 0.5 to 99.5% by mass of an aromatic vinyl monomer unit; and a vinyl polymer having a glass transition temperature of 0° C. or higher (provided that, when there are a plurality of glass transition points, all of the glass transition temperatures are 0° C. or higher), wherein the vinyl polymer powder satisfies the following Conditions [1] and [2]; Condition [1]: a bulk density as measured according to JIS K6720 is 0.30 to 0.60 g/cm3; Condition [2]: free flow property as measured by the following method is 20 g/10 sec or more; [Measurement Method for Free Flow Property] a measurement instrument, which includes a seat on which a tray is set, a funnel provided with a shutter at a cylindrical opening thereof which has an inner diameter of an upper part at 8 mm and an inner diameter of a lower part at 20 mm, a support holding the funnel above the seat, and a support rod to which the support is fixed, is placed in a horizontal site; the shutter of the funnel is closed, and 120 cm3 of powder is uniformly put into the funnel; subsequently, the shutter is opened to drop the powder, and immediately, the tray is set on the seat; at the same time of setting the tray, the counting of time starts by using a stopwatch, and after 10 seconds, the tray is removed from the measurement instrument; the tray containing the powder is weighed to obtain the amount of the powder dropped for 10 seconds; and the above measurement is carried out two times, and an average value of the amounts of the powder dropped for 10 seconds is obtained and this value is designated as the free flow property (g/10 sec).