US4614788A
Expired / Lapsed
US
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Thermosettable epoxy resin composition
Assignee: Dow Chemical Co
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Filing: 1985-08-28
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Granted: 1986-09-30
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Expires: 2005-08-28
Abstract
Abstract Disclosed are thermosettable compositions comprising (A) an epoxy resin such as the diglycidyl ether of bisphenol A; (B) boron trifluoride complexed with a primary, secondary or tertiary amine such as monoethanolamine and (C) at least one cyclic or acyclic phosphazene having at least one pendant ##STR1## group wherein Z is an alkyl or an aryl group such as hexa(n-propylamino)cyclotriphosphazene. When cured, these compositions have an increased glass transition temperature (Tg) value as compared to a similar composition without the phosphazene compound. These compositions are useful in potting compositions, wet lay-up and pre-impregnated laminate, adhesive, molding, coating, casting, encapsulation, filament winding and transfer molding applications.
Inventors
- 👤 Marvin L. Dettloff
- 👤 Dennis L. Steele
- 👤 Ross C. Whiteside, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:27
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4071; C08G59/50; C08G59/504; C08G59/68; C08G59/72
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
220 words
A thermosettable epoxy resin composition which comprises (A) an epoxy resin having an average of more than one vicinal 1,2-epoxy groups per molecule or a mixture thereof; (B) at least one boron trifluoride complex of a primary, secondary or tertiary amine or combination thereof; and (C) at least one acyclic or cyclic phosphazene compound having at least one pendant ##STR6## group wherein Z is a hydrocarbyl or a halogen substituted hydrocarbyl group having from about 1 to about 20 or a--Q--O--Q') n or a --Q--S--Q') n group wherein each Q and Q' is independently a divalent hydrocarbyl or halogen substituted hydrocarbyl group wherein the total number of carbon atoms in the Q and Q' groups is from 2 to about 20 and n has a value from 1 to about 10; wherein component (B) is employed in an amount of from about 2 to about 10 parts per one hundred parts by weight of component (A); component (C) is employed in an amount which provides an improvement in the glass transition temperature of the composition when cured but a quantity less than that quantity which results in decomposition of the resin mixture during cure and wherein a mixture consisting only of components (A), (B) and (C) forms a homogeneous composition at a temperature below which gelation of the mixture occurs.
Claim 2
Dependent Claim
220 words
A thermosettable epoxy resin composition which comprises (A) an epoxy resin having an average of more than one vicinal 1,2-epoxy groups per molecule or a mixture thereof; (B) at least one boron trifluoride complex of a primary, secondary or tertiary amine or combination thereof; and (C) at least one acyclic or cyclic phosphazene compound having at least one pendant ##STR6## group wherein Z is a hydrocarbyl or a halogen substituted hydrocarbyl group having from about 1 to about 20 or a--Q--O--Q') n or a --Q--S--Q') n group wherein each Q and Q' is independently a divalent hydrocarbyl or halogen substituted hydrocarbyl group wherein the total number of carbon atoms in the Q and Q' groups is from 2 to about 20 and n has a value from 1 to about 10; wherein component (B) is employed in an amount of from about 2 to about 10 parts per one hundred parts by weight of component (A); component (C) is employed in an amount which provides an improvement in the glass transition temperature of the composition when cured but a quantity less than that quantity which results in decomposition of the resin mixture during cure and wherein a mixture consisting only of components (A), (B) and (C) forms a homogeneous composition at a temperature below which gelation of the mixture occurs.
Claim 3
Dependent Claim
54 words
A composition of claim 1 wherein component (B) is employed in an amount of from about 3 to about 5 parts per one hundred parts by weight of component (A); component (C) is employed in an amount of from about 3 to about 25 parts per one hundred parts by weight of component (A).
Claim 4
Dependent Claim
139 words
A composition of claim 2 wherein component (B) is boron trifluoride complexed with (a) an alkylamine having from 1 to about 6 carbon atoms, (b) a dialkylamine having from 1 to about 6 carbon atoms in each alkyl group, (c) a trialkylamine having from about 1 to about 6 carbon atoms in each alkyl group, (d) an alkanolamine having from 1 to about 6 carbon atoms, (e) a dialkanolamine having from 1 to about 6 carbon atoms in each alkyl group, (f) a trialkanolamine having from about 1 to about 6 carbon atoms in each alkyl group, (g) an aryl amine having from about 6 to about 12 carbon atoms, (h) an N-alkyl aryl amine having a total of from about 7 to about 15 carbon atoms (i) any combination of any two or more of (a) through (h).
Claim 5
Dependent Claim
75 words
A composition of claim 3 wherein component (C) is employed in an amount of from about 10 to about 24 parts per one hundred parts by weight of component (A) and component (A) is a diglycidyl ether of bisphenol A, a diglycidyl ether of tetrabromobisphenol A or a mixture thereof; component (B) is boron trifluoride.2-aminoethanol complex, boron trifluoride.diethylamine complex, boron trifluoride.N,N-dimethylaniline complex or combination thereof and component (C) is hexa(n-propylamino)cyclotriphosphazene, octa(n-propylamino)cyclotetraphosphazene, chloropenta(n-butylamino)cyclotriphosphazene or combination thereof.
Claim 6
Dependent Claim
10 words
A product resulting from curing a composition of claim 1.
Claim 7
Dependent Claim
10 words
A product resulting from curing a composition of claim 2.
Claim 8
Dependent Claim
10 words
A product resulting from curing a composition of claim 3.
Claim 9
Dependent Claim
10 words
A product resulting from curing a composition of claim 4.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-09-29 | 1990-03-31 | 1990-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-29 | 1994-03-31 | 1994-09-30 | $3760.00 | Window Closed / Lapsed |
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