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. 16, 1976
Filed:
Feb. 12, 1975
Frederick C Loveless, Cheshire, CT (US);
Uniroyal, Inc., New York, NY (US);
Abstract
This invention relates to a solution process for preparing copolymers of a conjugated diene hydrocarbon and a vinyl-substituted aromatic hydrocarbon using a potassium-modified organolithium catalyst. The Li/K molar ratio is varied depending upon whether a random or pseudorandom copolymer is desired and depending on whether an aliphatic hydrocarbon or aromatic hydrocarbon solvent or a mixture of such solvents is used. The invention includes the pseudorandom copolymers formed by the process of the invention, such copolymers being characterized, in part, by having blocks with two to four units of the vinyl-substituted aromatic hydrocarbon interspersed throughout the copolymer chain.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile