EP0106635A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Latent curing agents for epoxy resins
Assignee: Ajinomoto Co Inc
•
Filing: 1983-10-06
•
Granted: —
•
Expires: 2003-10-06
Abstract
Abstract Hydrazides of the formula (I) or (II) are good latent curing agents for epoxy resin, in the formula (II) R is divalent hydrocarbon residue having 2-24 carbon atoms. The curing agents are useful in formulating novel storable one-package, heat-curable epoxy resin-based compositions.
Inventors
- 👤 Kiyomiki Hirai
- 👤 Koji Takeuchi
- 👤 Nobuo Ito
- 👤 Masahiro Abe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 08:42
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4035; C07; C07C; C07C243/00; C07C243/24; C07C243/26; C07C243/34
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
17 words
A compound having the formula: or wherein R is a divalent hydrocarbon residue having 2-24 carbon atoms.
Claim 2
Dependent Claim
17 words
A compound having the formula: or wherein R is a divalent hydrocarbon residue having 2-24 carbon atoms.
Claim 3
Dependent Claim
15 words
A compound as claimed in claim 1, wherein R is -(CH 2 ) 12 -.
Claim 4
Dependent Claim
20 words
A curing agent suitable for use with epoxy resin compositions, comprising a compound as claimed in claim 1 or 2.
Claim 5
Dependent Claim
35 words
A curable epoxy resin composition comprising (a) an epoxy resin having an average of more than one. epoxy group per molecule and (b), as curing agent, a compound as claimed in claim 1 or 2.
Claim 6
Dependent Claim
31 words
A curable epoxy resin composition as claimed in claim 4, wherein the amount of said compound is enough to provide 0.5-1.5 times active hydrogen equivalent weight based on epoxy equivalent weight.
Claim 7
Dependent Claim
25 words
A curable epoxy resin composition as claimed in claim 4 or 5, wherien said epoxy resin is a polygly- cidyl ether of a polyhydric phenol.
Claim 8
Dependent Claim
33 words
A cured resin obtained by contacting an epoxy resin having an average of more than one epoxy group per molecule with, as curing agent, a compound as claimed in claim 1 or 2.
Claim 9
Dependent Claim
29 words
A cured resin as claimed in claim 7, wherein the amount of said compound is enough to provide 0.5-1.5 times active hydrogen equivalent weight based on epoxy equivalent weight.
References Cited (Backward Citations)
CH338844A
Cited
US3467707A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.