Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate
2005-11-08
2005-11-08
Zimmer, Marc S (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
C525S406000, C528S123000, C528S124000, C528S407000, C564S305000, C564S306000, C564S315000, C564S330000, C564S448000, C564S451000, C564S457000, C564S462000
Reexamination Certificate
active
06962964
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.
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Boyce Stephen Michael
Dubowik David Alan
Ulman Michael
Vedage Gamini Ananda
Air Products and Chemicals Inc.
Bongiorno Mary E.
Brewer Russell L.
Zimmer Marc S
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