The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 09, 1979
Filed:
Oct. 07, 1976
Tetsuji Kato, Otake, JP;
Mitsubishi Rayon Co., Ltd., Tokyo, JP;
Abstract
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.degree. 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.