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:
Oct. 22, 1991
Filed:
Feb. 26, 1990
Karl W Wikelski, Odessa, TX (US);
Shinji Kojima, Yokohama, JP;
Resene Products Company, Odessa, TX (US);
Nippon Petrochemicals Co. Ltd., Tokyo, JP;
Abstract
A method for producing ethylene copolymer using ethylene and at least a comonomer of unsaturated glycidyl monomer in the presence of a polymerization initiator, wherein the undesirable thermal polymerization of the unsaturated glycidyl monomer in the preparation system can be avoided and the operation can be continued for a long period of time in a stable condition. The method is characterized in that at least two kinds of polymerization inhibitors are used and the inhibition factor of one polymerization inhibitor added to the unsaturated glycidyl monomer is smaller than that of another polymerization inhibitor added to the lubricating oil for compressors and the unsaturated glycidyl monomer containing 100 to 2000 ppm of a polymerization inhibitor is introduced from the inlet side of a high pressure compressor into the reaction system and the lubricating oil containing 0.1 to 10% by weight of a polymerization inhibitor is used for the high pressure compressor.