Patent ID: 6562936
Filing Date: 2003-05-13
Classification: B29C,C08G

Abstract:
A resin production apparatus having a vacuum resin treating apparatus for treating a polycarbonate produced by melt polymerizing an aromatic dihydroxy compound and an aromatic carbonic acid diester in the presence of a polymerization catalyst, wherein an opening is formed in the side surface of a horizontal cylindrical vacuum resin treating apparatus such that the angle formed by a line connecting the center of the treating apparatus and the lowest position of the opening and a horizontal line passing through the center of the treating apparatus is located above the horizontal plane and between 0Â° and 85Â° and the angle formed by a line connecting the center of the treating apparatus and the highest position of the opening and a horizontal line passing through the center of the treating apparatus is located above the horizontal plane and between 5Â° to 90Â° within a section perpendicular to the axial direction of the treating apparatus, and wherein at least the lower portion of a vacuum suction pipe connected to the opening has a falling gradient and wherein when the rotation of a rotor blade in the horizontal cylindrical vacuum resin treating apparatus is observed from the outside in the opening formed in the side surface of the horizontal cylindrical vacuum resin treating apparatus, the rotation direction of a rotating shaft is selected such that the rotor blade rotates from the bottom to the top.