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, 1985
Filed:
Jul. 20, 1984
Takayoshi Nagata, Hyogo, JP;
Mitsuaki Hashiyama, Shiga, JP;
Toyo Tire & Rubber Co., Ltd., Osaka, JP;
Abstract
A rubber composition, comprising from 20 to 150 parts by weight of carbon black incorporated in 100 parts by weight of rubber, said carbon black being a furnace carbon black having (1) a specific surface area (N.sub.2 SA) within the range of 75 to 105 as measured by the nitrogen adsorption technique, (2) the difference between said N.sub.2 SA value and the measured iodine adsorption (IA) being at least 15 (N.sub.2 SA-IA.gtoreq.15) and (3) the difference between said N.sub.2 SA value and the measured surface by the cetyltrimethylammonium bromide technique (CTAB) being not greater than 5 (N.sub.2 SA-CTAB.ltoreq.5), said furnace carbon black further having a dibutyl phthalate adsorption value (24M4 DBP) of not greater than 110 (ml/100 g) and a tinting strength (Tint) of 90 to 110, said carbon black having a storage elastic modulus E' of not greater than 12.5 MPa as specified by the ASTM-D 3191 method for carbon blacks.