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:
Jul. 15, 1997
Filed:
Jan. 30, 1995
Applicant:
Inventors:
Gary S Mistry, Sugarland, TX (US);
Kuan J Wang, Lake Jackson, TX (US);
Benjamin S Ehrlich, League City, TX (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ; C08G / ; C08L / ;
U.S. Cl.
CPC ...
524189 ; 524186 ; 524222 ; 524223 ; 524721 ; 524728 ; 528 49 ; 528 51 ; 528 52 ; 528 58 ; 528 77 ; 528 85 ;
Abstract
A rigid thermoplastic polyurethane with improved melt strength can be prepared by deactivating the catalyst for the polymer subsequent to the onset of urethane bond formation. Catalyst deactivation is accomplished either with a latent deactivator for the catalyst, or an active deactivator. The further addition of a crosslinker to the reaction mixture can provide an even greater improvement of melt strength.