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:
May. 31, 1988
Filed:
Jun. 08, 1987
Yuichi Orikasa, Yokohama, JP;
Shinji Kojima, Yokohama, JP;
Takashi Inoue, Yokohama, JP;
Kaoru Yamamoto, Tokyo, JP;
Atsushi Sato, Tokyo, JP;
Shigenobu Kawakami, Ichikawa, JP;
Abstract
The present invention provides a method for improving impulse destructive strength of an electrical insulating material which is characterized by employing, as the electrical insulating material, a random copolymer of a styrene series monomer and ethylene or a combination of ethylene and another ethylenic unsaturated monomer, or a composition in which the copolymer is blended with an ethylene series polymer, the copolymer being prepared by introducing, into a reaction system, the styrene series monomer selected from the group of styrene and single-ring substituted styrenes, ethylene or the combination of ethylene and the ethylenic unsaturated monomer and a polymerization initiator, the latter being introduced thereinto separately from at least the styrene series monomer, and subjecting these monomers to a high-pressure radical copolymerization under a polymerization pressure of 500 to 4,000 kg/cm.sup.2 at a polymerization temperature of 50.degree. to 400.degree. C., the aforesaid polymer or composition satisfying the following (a) and (b):
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile