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:
Sep. 03, 1991
Filed:
Apr. 07, 1989
Fredric L Buchholz, Midland, MI (US);
James W Ringer, Midland, MI (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
This invention relates to an improved process for polymerizing vinyl monomers, the improvement comprising using an amine having a functionally effective amount of .alpha.-hydrogens to act as an initiator site and as a crosslinking site for development of a polymer chain. The amine compound acts as a reducing agent in a redox pair initiator system and has a sufficient number of .alpha.-hydrogens available for oxidation to render polymer chain growth from more than two locations on the amine. Through the various available .alpha.-hydrogens and thus polymer chains, the amine compound imparts crosslinking in the polymer and simultaneously acts as an initiator site for polymerization. The crosslinking is therefore produced out from the initiator/crosslinker, instead of by linking existing or growing polymer chains together. The method by which the crosslinking occurs in the present invention is thought to decrease the number of dangling chains present when conventional polymerization methods are used.