METHOD FOR PREPARING VINYL CYANIDE COMPOUND-CONJUGATED DIENE RUBBER-AROMATIC VINYL COMPOUND GRAFT COPOLYMER, AND METHOD FOR PREPARING THERMOPLASTIC RESIN COMPOSITION COMPRISING SAME

• Main Authors: CHAI, Joo Byung, JEON, Taeyoung, JUNG, Yu Sung, KIM, Jong Beom, KIM, In Seok
• Format: Patent
• Language: English; French; Korean
• Published: 28.04.2022
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MAKING GRANULES OR PREFORMS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The present disclosure relates to a method for preparing a vinyl cyanide compound-conjugated diene rubber-aromatic vinyl compound graft copolymer, and a method for preparing a thermoplastic resin composition comprising same, and, more specifically, to a method for preparing a vinyl cyanide compound-conjugated diene rubber-aromatic vinyl compound graft copolymer, and a method for preparing a thermoplastic resin composition comprising same, the copolymer preparation method injecting a conjugated diene rubber latex with an average diameter of 2,400-2,800 Å into an enlarged conjugated diene rubber latex, which is obtained by enlarging a conjugated diene rubber latex with an average diameter of 2,400-2,800 Å by using a polymer coagulant, so as to prepare a bimodal conjugated diene rubber, and graft polymerizing same. According to the present disclosure, the preparation time of the enlarged conjugated diene rubber is reduced, and grafting efficiency is improved such that a synergistic effect in which both impact resistance and flowability are improved is provided. La présente divulgation concerne un procédé de préparation d'un copolymère greffé de composé vinylique aromatique-caoutchouc diénique conjugué-composé cyanure de vinyle, et un procédé de préparation d'une composition de résine thermoplastique comprenant celui-ci, et, plus particulièrement, un procédé de préparation d'un copolymère greffé de composé vinylique aromatique-caoutchouc diénique conjugué-composé cyanure de vinyle, et un procédé de préparation d'une composition de résine thermoplastique comprenant celui-ci, le procédé de préparation de copolymère comprenant l'injection d'un latex de caoutchouc diénique conjugué ayant un diamètre moyen de 2 400 à 2 800 Å dans un latex de caoutchouc diénique conjugué agrandi, qui est obtenu par l'agrandissement d'un latex de caoutchouc diénique conjugué ayant un diamètre moyen de 2 400 à 2 800 Å à l'aide d'un coagulant polymère, de sorte à préparer un caoutchouc diénique conjugué bimodal, et la polymérisation par greffage de celui-ci. Selon la présente divulgation, le temps de préparation du caoutchouc diénique conjugué agrandi est réduit, et l'efficacité de greffage est améliorée de sorte à fournir un effet synergique dans lequel à la fois la résistance aux chocs et l'aptitude à l'écoulement sont améliorées. 본 기재는 비닐시안 화합물-공액디엔 고무-방향족 비닐 화합물 그라프트 공중합체의 제조방법 및 이를 포함하는 열가소성 수지 조성물의 제조방법에 관한 것으로, 보다 상세하게는 평균입경이 2,400 내지 2,800 Å인 공액디엔 고무 라텍스를 고분자 응집제로 비대화시킨 비대화된 공액디엔 고무 라텍스에, 평균입경이 2,400 내지 2,800 Å인 공액디엔 고무 라텍스를 투입하여 바이모달 공액디엔 고무를 제조하고, 이를 포함하여 그라프트 중합시킨 비닐시안 화합물-공액디엔 고무-방향족 비닐 화합물 그라프트 공중합체의 제조방법 및 이를 포함하는 열가소성 수지 조성물의 제조방법에 관한 것이다. 본 기재에 따르면, 비대화된 공액디엔 고무 제조 시간을 단축하고 그라프트 효율을 높여 내충격성 및 유동성이 모두 향상된 시너지 효과를 갖는다. [대표도] 도 1