公开(公告)号：KR100441407B1

公开(公告)日：2004-07-23

申请号：KR1020020013210

申请日：2002-03-12

Applicant: 한국화학연구원

Inventor： 김광주 ,  이정민 ,  김철웅 ,  손희정

IPC: C08F6/16

Abstract: PURPOSE: Provided is a method for producing a globular powder of polymethylmethacrylate with high efficiency and high productivity, in which crystal is formed in solution by simple production equipment and process without polymerization additives such as emulsifier and dispersant. CONSTITUTION: The method comprises the steps of (i) stirring a mass polymethylmethacrylate resin at temperature of its boiling point or 20deg.C lower than the boiling point, in phase-separation solvent, so as to form transparent homogeneous solution; (ii) cooling the heated homogeneous solution to 0-30 deg.C in a rate of 0.001-200 deg.C/min., to perform a phase-separation of solvent and polymethylmethacrylate, thereby forming a nucleus of polymer crystal, and adjusting a growth velocity of the formed nucleus to form an inhomogeneous solution(from which polymethylmethacrylate is removed as a separate globular particle); and (iii) dissolving, washing and removing only the phase-separation solvent by using washing solvent, and isolating and filtrating the phase-separated polymethylmethacrylate, so as to globular polymethylmethacrylate powder having uniform size distribution.

Abstract translation: 目的：提供一种高效且高生产率的聚甲基丙烯酸甲酯球状粉末的制造方法，其中通过简单的生产设备和工艺在没有聚合添加剂如乳化剂和分散剂的情况下在溶液中形成结晶。 构成：该方法包括以下步骤：（i）在相分离溶剂中，在沸点或低于沸点20℃的温度下搅拌聚甲基丙烯酸甲酯树脂，以形成透明均匀溶液; （ii）以0.001〜200℃/ min的速度将加热后的均匀溶液冷却至0〜30℃，进行溶剂与聚甲基丙烯酸甲酯的相分离，形成聚合物晶体的核， 形成的核的生长速度以形成不均匀的溶液（聚甲基丙烯酸甲酯作为单独的球形颗粒从中移除）; （iii）通过使用洗涤溶剂仅溶解，洗涤和除去相分离溶剂，并分离和过滤相分离的聚甲基丙烯酸甲酯，从而得到具有均匀尺寸分布的球状聚甲基丙烯酸甲酯粉末。

公开(公告)号：KR1020030073576A

公开(公告)日：2003-09-19

申请号：KR1020020013210

申请日：2002-03-12

Applicant: 한국화학연구원

Inventor： 김광주 ,  이정민 ,  김철웅 ,  손희정

IPC: C08F6/16

CPC classification number: C08F120/14 ,  C08F2/02 ,  C08J3/12

Abstract: PURPOSE: Provided is a method for producing a globular powder of polymethylmethacrylate with high efficiency and high productivity, in which crystal is formed in solution by simple production equipment and process without polymerization additives such as emulsifier and dispersant. CONSTITUTION: The method comprises the steps of (i) stirring a mass polymethylmethacrylate resin at temperature of its boiling point or 20deg.C lower than the boiling point, in phase-separation solvent, so as to form transparent homogeneous solution; (ii) cooling the heated homogeneous solution to 0-30 deg.C in a rate of 0.001-200 deg.C/min., to perform a phase-separation of solvent and polymethylmethacrylate, thereby forming a nucleus of polymer crystal, and adjusting a growth velocity of the formed nucleus to form an inhomogeneous solution(from which polymethylmethacrylate is removed as a separate globular particle); and (iii) dissolving, washing and removing only the phase-separation solvent by using washing solvent, and isolating and filtrating the phase-separated polymethylmethacrylate, so as to globular polymethylmethacrylate powder having uniform size distribution.

Abstract translation: 目的：提供一种以高效率，高生产率生产聚甲基丙烯酸甲酯的球状粉末的方法，其中通过简单的生产设备和不含聚合添加剂如乳化剂和分散剂的方法在溶液中形成晶体。 方案：该方法包括以下步骤：（i）在相分离溶剂中，在沸点或低于沸点的温度下搅拌聚甲基丙烯酸甲酯树脂，形成透明的均匀溶液; （ii）将加热的均匀溶液以0.001-200℃/分钟的速率冷却至0-30℃，进行溶剂和聚甲基丙烯酸甲酯的相分离，从而形成聚合物晶体的核，并调节 所形成的核的生长速度形成不均匀的溶液（聚甲基丙烯酸甲酯作为单独的球状颗粒除去）; 和（iii）通过使用洗涤溶剂仅溶解，洗涤和除去相分离溶剂，并分离并过滤相分离的聚甲基丙烯酸甲酯，从而具有均匀尺寸分布的球形聚甲基丙烯酸甲酯粉末。