PRODUCTION PROCESS OF ACRYLONITRILE (CO)POLYMERS AND A POLYMERIZATION REACTION TANK THEREFOR

• Main Authors: IWAMOTO, MUNE, UCHIDA, MUTSUKO, KAWANO, KOJI, MORITA, HISAO, NAKAJIMA, AKIHIKO, TAKAKU, MASATO
• Format: Patent
• Language: English; Korean
• Published: 15.06.1999
• Edition: 6
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; THEIR RELEVANT APPARATUS; TRANSPORTING

본 발명은, 적어도 아크릴로니트릴계 단량체를 필수성분으로서 함유한 단량체를 괴상 또는 용액중합에 의해 단량체를 증발시키면서 80℃이상의 온도에서 (공)중합하는 방법에 있어서, 반응조내부에, 하부중합액에 대하여 상부에 기상부분을 형성할때, 이 기상의 온도를 30℃∼65℃로 유지하고, 실질적으로 하부중합액으로부터의 증발증기를 반응조밖으로 내보내지 않고 중합하는 것을 특징으로 하는 (공)중합체의 제조방법을 제공하는 것으로서, 본 발명의 방법에 의해, 반응조의 기상부를 냉각하고, 특정한 온도로 유지함으로써 기상부에서의 미반응모노머의 중합을 억제하고, 겔화한 폴리머가 제품속에 혼입하는 일없이, 또한 중합시의 반응열을 효율적으로 제거할 수 있다. A process for the (co)polymerization of a monomer material, which includes at least an acrylonitrile monomer as an essential component, is performed at a temperature of 80 DEG C or higher by bulk or solution polymerization. The (co)polymerization is conducted in a reaction tank while allowing said monomer material to evaporate and form a vapor phase over the polymerization mixture. During the (co)polymerization, the temperature of the vapor phase is maintained in a range of from 30 DEG C to 65 DEG C and the polymerization is conducted without substantially releasing vapor, which is evaporated from the polymerization mixture, to an outside of the reaction tank. By cooling the valor phase of the reaction tank and maintaining its temperature in the 30 DEG C to 65 DEG C range, it is possible to avoid mixing of a gelled polymer in the product and also to effectively remove reaction heat at the time of the (co)polymerization.