THERMOPLASTIC POLYESTER ELASTOMER RESIN FOAM MOLDING AND METHO FOR MANUFACTURING THE SAME

• Main Authors: SHIMADA TAKESHI, UEMURA YUJI
• Format: Patent
• Language: English; Japanese
• Published: 17.10.2022
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

To provide a thermoplastic polyester elastomer resin foam molding which is excellent in light weight property and high expansion property while being flexible and having a low repulsion elastic modulus.SOLUTION: A resin foam molding is formed from a thermoplastic polyester elastomer resin composition obtained by blending 20-95 mass% of a polyester block copolymer (A) composed of a high melting point crystalline segment composed of a crystalline aromatic polyester unit and a low melting point polymer segment composed of an aliphatic polyether unit, and 5-80 mass% of a core-shell copolymer (B) having a polymer obtained by emulsion polymerization of butylacrylate, an alkyl (meth)acrylate having an alkyl group having 1 to 4 carbon atoms, a vinyl cyanide compound, a maleic acid monoalkyl ester and a crosslinking agent as a core, and a polymer obtained by polymerization of styrene, vinyl cyanide and a crosslinking agent as a shell, and has a density of less than 0.70 g/cm3 and an expansion ratio of 2.0 or more and a repulsion elastic modulus of 60% or less.SELECTED DRAWING: None 【課題】柔軟かつ低反発弾性率でありながら軽量性、高発泡性に優れる熱可塑性ポリエステルエラストマー樹脂発泡成形体を提供する。【解決手段】結晶性芳香族ポリエステル単位からなる高融点結晶性セグメントと、脂肪族ポリエーテル単位からなる低融点重合体セグメントからなるポリエステルブロック共重合体（Ａ）２０～９５質量％、ブチルアクリレート、炭素数１～４のアルキル基を有する（メタ）アクリル酸アルキルエステル、ビニルシアン化合物、マレイン酸モノアルキルエステルおよび架橋剤を乳化重合させてなる重合体をコアとし、さらにスチレン、ビニルシアン、架橋剤を重合させてなる重合体をシェルとしたコア・シェル共重合体（Ｂ）５～８０質量％とを配合してなる熱可塑性ポリエステルエラストマー樹脂組成物からなり、密度が０．７０ｇ／ｃｍ３未満、発泡倍率が２．０以上、且つ反発弾性率が６０％以下である樹脂発泡成形体。【選択図】なし