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:
Nov. 18, 1997
Filed:
Sep. 20, 1995
Frederick Herbert Walker, Doylestown, PA (US);
Air Products and Chemicals, Inc., Allentown, PA (US);
Abstract
An amine hardener composition for curing epoxy resin based coatings and related products comprising (A) from 5 to 75% of a diamine which possesses a vapor pressure less than about 133 Pascals at 20.degree. C., contains both a primary and a tertiary amine and corresponds to either of the structures: ##STR1## where R.sub.1 and R.sub.2 are independently C.sub.1 -C.sub.8 alkyl; X is --CH.sub.2 --CH.sub.2 --, --CH.sub.2 --CH.sub.2 --CH.sub.2 --, or --CH.sub.2 --O--CH.sub.2 --; and n is 2-6, (B) from 5 to 95% of a polyamide, amidoamine, Mannich base or cycloaliphatic amine curing agent; and (C) from 0 to 50% of other active hydrogen containing dismines or polyamines. Coatings based on the composition can be formulated at up to 100% solids, and have an excellent combination of pot life and dry speed.