Patent US4485229A successfully refreshed from Google Patents.
US4485229A
Expired / Lapsed
US
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Epoxy resin containing a combination of high and low molecular weight polyoxyalkylene polyamine curing agents
Assignee: Huntsman Corp
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Filing: 1984-02-15
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Granted: 1984-11-27
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Expires: 2004-02-15
Abstract
Abstract The adhesion properties of amine cured epoxy resins are unexpectedly enhanced by addition of a certain combination of high and low molecular weight polyoxyalkylene polyamines. The adhesively superior epoxy resin composition comprises a vicinal polyepoxide, a curing amount of a combination of about 85 wt. % or more of certain polyoxyalkylene polyamines having a molecular weight of less than about 450 and 15 wt. % or less of a polyoxyalkylene polyamine of greater than two primary amine functionality and a molecular weight of about 5,000 and above.
Inventors
- 👤 Harold G. Waddill
- 👤 Richard J. G. Dominguez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:20
CPC Classifications
C; C08; C08L; C08L63/00; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/504; C08G2650/00; C08G2650/28; C08G2650/50; C08L71/00; C08L71/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
94 words
An epoxy resin composition having superior adhesion properties and being the cured reaction product of a curable admixture which comprises a vicinal polyepoxide having an epoxide equivalency of greater than 1.8 and a curing amount of a combination of polyamines comprising: an effective amount of about 15 wt.% or less of a polyoxyalkylene polyamine having an amine functionality greater than 2 and a molecular weight of about 5,000 or more and about 85 wt.% or more of a polyoxyalkylene polyamine of functionality 2 or greater and a molecular weight of about 200 to 450.
Claim 2
Dependent Claim
94 words
An epoxy resin composition having superior adhesion properties and being the cured reaction product of a curable admixture which comprises a vicinal polyepoxide having an epoxide equivalency of greater than 1.8 and a curing amount of a combination of polyamines comprising: an effective amount of about 15 wt.% or less of a polyoxyalkylene polyamine having an amine functionality greater than 2 and a molecular weight of about 5,000 or more and about 85 wt.% or more of a polyoxyalkylene polyamine of functionality 2 or greater and a molecular weight of about 200 to 450.
Claim 3
Dependent Claim
126 words
An epoxy resin composition as in claim 1 wherein the polyoxyalkylene polyamine of about 15 wt.% or less has the structure ##STR5## where Y is hydrogen, a methyl radical or an ethyl radical, Z is a hydrocarbon radical of 3-5 carbon atoms, n is a number sufficient to impart a molecular weight of about 5,000 or more of the molecule and r is a number greater than 2 and the polyoxyalkylene polyamine of about 85 wt.% or greater has the structure ##STR6## where Y is hydrogen, a methyl radical or a methyl radical, Z is a hydrocarbon radical of 2-5 carbon atoms, n is a number sufficient to impart a molecular weight of about 200-450 to the molecule and r is a number 2 or greater.
Claim 4
Dependent Claim
74 words
An epoxy resin composition as in claim 1 wherein the polyoxyalkylene polyamines of about 85 wt.% or greater have the general structures H.sub.2 NCH(CH.sub.3)CH.sub.2 [OCH.sub.2 CH(CH.sub.3)].sub.w NH.sub.2 wherein w is a finite number such that the molecular weight of said polyoxyalkylene polyamine is from about 200 to about 300 or the general structure ##STR7## wherein x+y+z are finite numbers having a total such that the molecular weight of said polyoxyalkylene polyamine is about 400.
Claim 5
Dependent Claim
44 words
An epoxy resin composition as in claim 1 wherein the polyoxyalkylene polyamine of about 15 wt.% or less has the general structure ##STR8## wherein x+y+z are numbers having a total such that the molecular weight of said polyoxyalkylene polyamine is about 5,000 or more.
Claim 6
Dependent Claim
114 words
An epoxy resin composition having superior adhesion properties and being the cured reaction product of a curable admixture which comprises a vicinal polyepoxide having an epoxide equivalency of greater than 1.8 and a curing amount of a combination of polyamines comprising an effective amount but about 15 wt.% or less of a polyoxyalkylene polyamine having the general structure ##STR9## wherein x+y+z are numbers having a total such that the molecular weight of said polyoxyalkylene polyamine is about 5,000 or more and about 85 wt.% or more of polyalkylene polyamines of the general structure ##STR10## wherein x+y+z are finite numbers having a total such that the molecular weight of said polyoxyalkylene polyamine is about 400.
Claim 7
Dependent Claim
114 words
An epoxy resin composition having superior adhesion properties and being the cured reaction product of a curable admixture which comprises a vicinal polyepoxide having an epoxide equivalency of greater than 1.8 and a curing amount of a combination of polyamines comprising an effective amount but about 15 wt.% or less of a polyoxyalkylene polyamine having the general structure ##STR9## wherein x+y+z are numbers having a total such that the molecular weight of said polyoxyalkylene polyamine is about 5,000 or more and about 85 wt.% or more of polyalkylene polyamines of the general structure ##STR10## wherein x+y+z are finite numbers having a total such that the molecular weight of said polyoxyalkylene polyamine is about 400.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-27 | 1988-05-28 | 1988-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-27 | 1992-05-28 | 1992-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-27 | 1996-05-28 | 1996-11-27 | $7700.00 | Window Closed / Lapsed |