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US4847233A
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Metal acetylacetonate/alkylphenol curing catalyst for polycyanate esters of polyhydric phenols
Assignee: Huntsman Advanced Materials Americas LLC
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Filing: 1988-08-05
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Granted: 1989-07-11
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Expires: 2008-08-05
Abstract
Abstract Polycyanate esters of polyhydric phenols are cured with a liquid solution of a metal acetylacetonate in an alkylphenol. Such cured compositions are useful in structural composites, transfer molded-encapsulants, filmed structural adhesives and printed wiring boards.
Inventors
- 👤 David A. Shimp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:22
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0622; C08G73/0638; C08G73/065; C08G73/0655; C08G73/0661
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
59 words
A curing catalyst for polycyanate esters of polyhydric phenols comprising a liquid solution of a metal acetylacetonate in an alkylphenol wherein the metal is a coordinating metal and wherein the alkylphenol has 1 or 2 alkyl substituents ortho or para to the phenol group and wherein the alkyl groups contain a total of one to about 22 carbon atoms.
Claim 2
Dependent Claim
59 words
A curing catalyst for polycyanate esters of polyhydric phenols comprising a liquid solution of a metal acetylacetonate in an alkylphenol wherein the metal is a coordinating metal and wherein the alkylphenol has 1 or 2 alkyl substituents ortho or para to the phenol group and wherein the alkyl groups contain a total of one to about 22 carbon atoms.
Claim 3
Dependent Claim
25 words
The catalyst of claim 1 wherein about 0.01 to about 25 weight percent metal acetylacetonate is present based on the total weight of the catalyst.
Claim 4
Dependent Claim
24 words
The catalyst of claim 1 wherein the coordinating metal is a transition metal having nine or more electrons in its next-to-outermost shell or aluminum.
Claim 5
Dependent Claim
33 words
The catalyst of claim 1 wherein the coordinating metal is selected from the group consisting of divalent copper, manganese, tin, lead, cobalt and nickel, trivalent iron, cobalt, manganese and aluminum, and tetravelent titanium.
Claim 6
Dependent Claim
12 words
The catalyst of claim 1 wherein the metal acetylacetonate is copper acetylacetonate.
Claim 7
Dependent Claim
21 words
The catalyst of claim 1 wherein the alkylphenol is selected from the group consisting of nonylphenol, dodecylphenol, o-cresol, 2-sec.butylphenol and 2,6-dinonylphenol.
Claim 8
Dependent Claim
10 words
The catalyst of claim 1 wherein the alkylphenol is nonylphenol.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |