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:
Mar. 25, 1997
Filed:
Apr. 23, 1996
Takeshi Hashimoto, Shizuoka, JP;
Akira Tezuka, Shizuoka, JP;
Takeshi Nishigaya, Shizuoka, JP;
Fumiyoshi Yamanashi, Shizuoka, JP;
Tomoegawa Paper Co., Ltd., Tokyo, JP;
Abstract
This invention provide an adhesive tape by which adhesion to a metal spreader is not required and a cutting process is not necessary. The adhesive tape comprises an adhesive layer provided on at least one surface of metal sheet, said adhesive layer being semi-cured into a B-stage and comprised of: (a) a piperazinylethylaminocarbonyl-containing butadiene-acrylonitrile copolymer of the formula (I): ##STR1## wherein, k, m, and n are molar ratios and taking n as l, k is a number of 3-175, and m is a number of 0.3 to 93; and (b) a compound having at least two maleimide groups, the ratio of component (b) based on 100 parts by weight of component (a) being in a range of 10 to 900 parts by weight, and said adhesive layer being composed of at least two semi-cured layers having each a different status of semi-cure.