ETHYLENE-(METH)ACRYLATE-BASED ELASTOMER AND METHOD FOR PRODUCING THE SAME

• Main Authors: TOGE DAICHI, SAOTOME IKUO, WATANABE DAIKI, ABE KAZUNARI
• Format: Patent
• Language: English; Japanese
• Published: 04.10.2022
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

To provide an ethylene-(meth)acrylate-based elastomer which gives a vulcanizate excellent in heat resistance and moldability, and a method for producing the same.SOLUTION: The ethylene-(meth)acrylate-based elastomer has a structure obtained by copolymerization in a ratio of 40-79.9 mol% of ethylene, 20.0-50.0 mol% of an alkyl (meth)acrylate having a C1-8 alkyl group and/or an alkoxy (meth)acrylate having a C2-8 alkoxyalkyl group, 0.05-20.0 mol% of an unsaturated dicarboxylic acid monosaturated ester, and 0-20.0 mol% of an unsaturated dicarboxylic acid anhydride. The monosaturated esterification rate of the acid anhydride measured by IR is 70% or more.SELECTED DRAWING: None 【課題】耐熱性および成形加工性にすぐれた加硫物を与えるエチレン－(メタ)アクリレート系エラストマーおよびその製造法を提供する。【解決手段】エチレン40～79.9モル％、炭素数1～8のアルキル基を有するアルキル(メタ)アクリレートおよび/または炭素数2～8のアルコキシアルキル基を有するアルコキシ(メタ)アクリレート20.0～50.0モル％、不飽和ジカルボン酸モノ飽和エステル0.05～20.0モル％および不飽和ジカルボン酸無水物0～20.0モル％の割合で共重合された構造を有し、IRで測定した酸無水物のモノ飽和エステル化率が70％以上であるエチレン－(メタ)アクリレート系エラストマー。【選択図】なし