Process for continuous manufacture of methyl methacrylate polymer plate

摘要

An improvement in the process for continuously manufacturing a methyl methacrylate polymer plate by polymerizing the monomer in a casting space defined by the confronting surfaces of two endless belts running in face-to-face relationship with each other is provided. The improvement is characterized in that the belts are first passed through a first polymerization zone wherein the belts are contacted by hot water, the belts leaving this zone are freed from water clinging to their surfaces, and the belts are then passed through a second polymerizing zone having a temperature above 100 DEG C and forming the polymer plate which is then cooled at a controlled rate prior to withdrawal from the belts. The plate product has an improved heat distortion temperature.