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. 13, 1981
Filed:
Feb. 14, 1980
James N Henderson, Hudson, OH (US);
The Goodyear Tire & Rubber Company, Akron, OH (US);
Abstract
There is disclosed copolymers of 2,3-dimethyl-1,3-butadiene with butadiene or isoprene in which the 2,3-dimethyl-1,3-butadiene content ranges from about 20 to about 80 mole percent, characterized in that the microstructure of the 2,3-dimethyl-1,3-butadiene segments range from about 55 to about 65 percent trans-1,4. Also disclosed are copolymers of 2,3-dimethyl-1,3-butadiene with butadiene or isoprene in which the 2,3-dimethyl-1,3-butadiene content ranges from about 20 to about 80 mole percent characterized in that the microstructure of the 2,3-dimethyl-1,3-butadiene segments range from about 40 to about 65 percent trans-1,4 and 1,2 content of said segments does not exceed 20 percent, said copolymers being prepared by bulk polymerization techniques.