Patent US4500582A successfully refreshed from Google Patents.
US4500582A
Expired / Lapsed
US
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Modified amine hardener systems
Assignee: BASF Corp
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Filing: 1982-02-05
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Granted: 1985-02-19
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Expires: 2002-02-05
Abstract
Abstract A resinous hardener system comprising the reaction product of diamino diphenylsulfone compounds and diglycidyl ethers of polyhydric phenols. The hardener system can be incorporated into a variety of epoxy resins for use as improved prepreg or laminating resins, as resin molded castings, and the like.
Inventors
- 👤 John J. King
- 👤 Ralph F. Sellers
- 👤 Richard N. Castonguay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:45
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/182; C08G59/184; C08J; C08J5/00; C08J5/24; C08J5/241; C08J5/243; C08J5/249; C08J2363/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2971; Y10T428/30; Y10T428/31504; Y10T428/31511; Y10T428/31525
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
102 words
A honeycomb structure comprising skins bonded to each side of a honeycomb core, said skins comprising the cured product of a wound yarn impregnated with a curable mixture comprising a polyepoxide compound and a hardener comprising the adduct obtained from the reaction of a diamino diphenylsulfone corresponding to the formula ##STR3## wherein R 1 , R 2 , R 3 and R 4 are independently hydrogen, straight and branched chain alkyl of 1 to 12 carbon atoms or halogen, and a diglycidyl ether of a polyhydric phenol; said hardener having from about 2.5 to 100 equivalents of aminohydrogen per equivalent of epoxy.
Claim 2
Dependent Claim
102 words
A honeycomb structure comprising skins bonded to each side of a honeycomb core, said skins comprising the cured product of a wound yarn impregnated with a curable mixture comprising a polyepoxide compound and a hardener comprising the adduct obtained from the reaction of a diamino diphenylsulfone corresponding to the formula ##STR3## wherein R 1 , R 2 , R 3 and R 4 are independently hydrogen, straight and branched chain alkyl of 1 to 12 carbon atoms or halogen, and a diglycidyl ether of a polyhydric phenol; said hardener having from about 2.5 to 100 equivalents of aminohydrogen per equivalent of epoxy.
Claim 3
Dependent Claim
13 words
The honeycomb structure of claim 1, wherein said sulfone is diamino diphenyl sulfone.
Claim 4
Dependent Claim
34 words
The honeycomb structure of claim 1, wherein said diglycidyl ether is selected from the group consisting of diglycidyl ethers of bisphenols corresponding to the formula ##STR4## the diglycidyl ethers or resorcinol, catechol and hydroquinone.
Claim 5
Dependent Claim
17 words
The honeycomb structure of claim 3, wherein said diglycidyl ether is the diglycidyl ether of bisphenol A.
Claim 6
Dependent Claim
19 words
The honeycomb structure of claim 1, wherein said hardener and said polyepoxide compound are present in stoichiometric amounts ±50%.
Claim 7
Dependent Claim
37 words
The honeycomb structure of claim 1, wherein said polyepoxide compound is selected from the group consisting of epoxide resins based on polyhydric phenols, hydantoin epoxide resins, polyglycidyl esters, glycidylated aromatic amines, glycidylated aminophenols and cycloaliphatic epoxy resins.
Claim 8
Dependent Claim
14 words
The honeycomb structure of claim 6, wherein said polyepoxide compound is tetraglycidylated methylene dianiline.
Claim 9
Dependent Claim
43 words
The honeycomb structure of claim 1, wherein said curable mixture comprises (a) tetraglycidylated methylene dianiline and (b) a hardener comprising the reaction product of diamino diphenylsulfone and diglycidyl ether of bisphenol A; said hardener being present at 85% stoichiometry relative to said dianiline.
Claim 10
Dependent Claim
67 words
A laminate structure comprising the cured, compression molded product of a wound yarn impregnated with a curable mixture comprising polyepoxide compound and a hardener comprising the adduct obtained from the reaction of a diamino diphenylsulfone corresponding to the formula ##STR5## wherein R 1 , R 2 , R 3 and R 4 are independently hydrogen, straight and branched chain alkyl of 1 to 12 carbons or halogen,
Claim 11
Dependent Claim
67 words
A laminate structure comprising the cured, compression molded product of a wound yarn impregnated with a curable mixture comprising polyepoxide compound and a hardener comprising the adduct obtained from the reaction of a diamino diphenylsulfone corresponding to the formula ##STR5## wherein R 1 , R 2 , R 3 and R 4 are independently hydrogen, straight and branched chain alkyl of 1 to 12 carbons or halogen,
Claim 12
Dependent Claim
23 words
and a diglycidyl ether of a polyhydric phenol; said hardener having from about 2.5 to 100 equivalents of aminohydrogen per equivalent of epoxy.
Claim 13
Dependent Claim
23 words
and a diglycidyl ether of a polyhydric phenol; said hardener having from about 2.5 to 100 equivalents of aminohydrogen per equivalent of epoxy.
Claim 14
Dependent Claim
13 words
The laminate structure of claim 9, wherein said sulfone is diamino diphenyl sulfone.
Claim 15
Dependent Claim
34 words
The laminate structure of claim 9, wherein said diglycidyl ether is selected from the group consisting of diglycidyl ethers of bisphenols corresponding to the formula ##STR6## the diglycidyl ethers of resorcinol, catechol and hydroquinone.
Claim 16
Dependent Claim
17 words
The laminate structure of claim 11, wherein said diglycidyl ether is the diglycidyl ether of bisphenol A.
Claim 17
Dependent Claim
19 words
The laminate structure of claim 9, wherein said hardener and said polyepoxide compound are present in stoichiometric amounts ±50%.
Claim 18
Dependent Claim
37 words
The laminate structure of claim 9, wherein said polyepoxide compound is selected from the group consisting of epoxide resins based on polyhydric phenols, hydantoin epoxide resins, polyglycidyl esters, glycidylated aromatic amines, glycidylated aminophenols and cycloaliphatic epoxy resins.
Claim 19
Dependent Claim
14 words
The laminate structure of claim 14, wherein said polyepoxide compound is tetraglycidylated methylene dianiline.
Claim 20
Dependent Claim
43 words
The laminate structure of claim 9, wherein said curable mixture comprises (a) tetraglycidylated methylene dianiline and (b) a hardener comprising the reaction product of diamino diphenylsulfone and diglycidyl ether of bisphenol A; said hardener being present at 85% stoichiometry relative to said dianiline.
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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) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |