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. 08, 2005
Filed:
Feb. 06, 2003
Michael Ulman, Alburtis, PA (US);
Gamini Ananda Vedage, Bethlehem, PA (US);
David Alan Dubowik, Allentown, PA (US);
Stephen Michael Boyce, Bath, PA (US);
Michael Ulman, Alburtis, PA (US);
Gamini Ananda Vedage, Bethlehem, PA (US);
David Alan Dubowik, Allentown, PA (US);
Stephen Michael Boyce, Bath, PA (US);
Air Products and Chemicals, Inc., Allentown, PA (US);
Abstract
This invention relates to improved polyepoxide resins cured with a mixture of methylene bridged poly(cycloaliphatic-aromatic)amines and a process for preparing such polyepoxide resins as well as to the methylene bridged poly(cycloaliphatic-aromatic)amine compositions and a method of making them. The improvement resides in using a curative (herein referred to as 'Heavy MPCA') comprised of the partially hydrogenated condensation product of formaldehyde and aniline or methyl substituted aniline containing a substantial amount (from 35 to 85% by weight, preferably 40 to 60% by weight) of oligomers in the form of 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15 aniline or methyl substituted aniline derivatives.