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. 26, 1995
Filed:
May. 04, 1993
Applicant:
Inventors:
Kevin R Lassila, Allentown, PA (US);
Michael E Ford, Coopersburg, PA (US);
Kenneth M Kem, Emmaus, PA (US);
Susan M Clift, Lansdale, PA (US);
Assignee:
Air Products and Chemicals, Inc., Allentown, PA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528 64 ; 528 52 ; 528 61 ; 528 68 ; 528 76 ; 528 80 ; 528 85 ; 521155 ; 521159 ; 521163 ; 25218212 ; 25218213 ; 564307 ; 564309 ;
Abstract
This invention relates to o-tolidines which have a tert-butyl substituent ortho to an amine group. These compositions are represented by the formula: ##STR1## where R.sub.1 =i-propyl, or t-butyl, and where R.sub.2 =hydrogen, i-propyl, or t-butyl. The compositions are useful in the preparation of polyepoxide resins as well as polyurethanes, polyamides and polyimides.