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:
Apr. 09, 2019
Filed:
Mar. 11, 2015
Arakawa Chemical Industries, Ltd., Osaka-shi, JP;
Takashi Nakatani, Osaka, JP;
Yoshimasa Sato, Tsukuba, JP;
Tetsuya Kashihara, Tsukuba, JP;
Yasushi Funakoshi, Osaka, JP;
ARAKAWA CHEMICAL INDUSTRIES, LTD., Osaka-shi, JP;
Abstract
An object of the present invention is to provide an adhesive composition that is substantially odorless and has an extremely good color and excellent adhesive properties or tack at low temperatures of about 5° C. and in which deterioration over time caused by heat or light is suppressed. The present invention relates to an adhesive composition comprising a liquid rosin ester compound, the liquid rosin ester compound being obtained by reacting a rosin compound with a Cmonohydric alcohol compound and having a Gardner color of 1 or less, a glass transition temperature of −20° C. or less, a degree of esterification of 93 wt % or more, and a ratio (Y'/Y) of the total area of peaks in 16- to 22-min retention time region (Y′) to the total area of all the peaks (Y) measured by gas chromatography under the following conditions of 200 ppm or less.