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:
May. 17, 1988
Filed:
Aug. 23, 1985
William F Burgoyne, Jr, Allentown, PA (US);
Jeremiah P Casey, Emmaus, PA (US);
Dale D Dixon, Kutztown, PA (US);
Barton Milligan, Coplay, PA (US);
Air Products and Chemicals, Inc., Allentown, PA (US);
Abstract
This invention relates to a class of tertiary-alkyltoluenediamines having alkyl groups ortho to an amine group. More particularly the aromatic diamines are represented by the formulas: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are C.sub.1-3 alkyl groups or R.sub.2 and R.sub.3 are combined to form a C.sub.5-6 membered ring. The above described alkylated aromatic diamines have been found to be well suited for use as a chain extender in forming polyurethane/urea elastomer systems and the mono tert-butyltoluenediamine isomers have been found to be nonmutagenic in the Ames test.