US4136086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable epoxide resin mixtures
Assignee: BASF Corp
•
Filing: 1978-02-21
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Granted: 1979-01-23
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Expires: 1998-02-21
Abstract
Abstract Curable mixtures of (a) epoxide compounds, (b) adducts containing mercapto groups, which adducts are produced by an advancement reaction of dimercapto compounds with diglycidyl compounds in an amount less than the equivalent amount, and (c) carboxylic anhydrides. The curable mixtures are suitable as casting resin mixtures, particularly for producing moulded articles of large volume.
Inventors
- 👤 Dieter Baumann
- 👤 Heinz Rembold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:00
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4284; C08G59/182; C08G59/66
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
119 words
A curable mixture based on epoxide compounds, dimercapto compounds and polycarboxylic anhydrides, which mixture comprises (a) an epoxide compound having on an average more than one 1,2-epoxide group in the molecule, (b) an adduct containing mercapto groups, which is obtained by reaction of n mol of a diglycidyl compound with n+1 mols of an aliphatic or aromatic dimercapto compound, where n denotes an integer, and (c) a polycarboxylic anhydride, the amounts contained being such that there are present in the curable mixture 0.1 to 0.5 equivalent of mercapto groups of the adduct (b) and 0.9 to 0.5 equivalent of an anhydride group of the polycarboxylic anhydride (c) per 1 equivalent of an epoxide group of the epoxide compound (a).
Claim 2
Dependent Claim
119 words
A curable mixture based on epoxide compounds, dimercapto compounds and polycarboxylic anhydrides, which mixture comprises (a) an epoxide compound having on an average more than one 1,2-epoxide group in the molecule, (b) an adduct containing mercapto groups, which is obtained by reaction of n mol of a diglycidyl compound with n+1 mols of an aliphatic or aromatic dimercapto compound, where n denotes an integer, and (c) a polycarboxylic anhydride, the amounts contained being such that there are present in the curable mixture 0.1 to 0.5 equivalent of mercapto groups of the adduct (b) and 0.9 to 0.5 equivalent of an anhydride group of the polycarboxylic anhydride (c) per 1 equivalent of an epoxide group of the epoxide compound (a).
Claim 3
Dependent Claim
44 words
A mixture according to claim 1, which contains 0.2 to 0.4 equivalent of mercapto groups of the adduct (b) and 0.8 to 0.6 equivalent of an anhydride of the polycarboxylic anhydride (c) per 1 equivalent of an epoxide group of the epoxide compound (a).
Claim 4
Dependent Claim
15 words
A mixture according to claim 1, which contains a polyglycidyl compound as epoxide compound (a).
Claim 5
Dependent Claim
16 words
A mixture according to claim 1, which contains a liquid epoxide compound as epoxide compound (a).
Claim 6
Dependent Claim
27 words
A mixture according to claim 1, which contains an adduct (b) containing mercapto groups, which adduct has been produced with the use of a liquid diglycidyl compound.
Claim 7
Dependent Claim
27 words
A mixture according to claim 1, which contains an adduct (b) containing mercapto groups, which adduct has been produced with the use of an aromatic diglycidyl ether.
Claim 8
Dependent Claim
26 words
A mixture according to claim 1, which contains an adduct (b) containing mercapto groups, which adduct has been produced with the use of an N-diglycidyl compound.
Claim 9
Dependent Claim
38 words
A mixture according to claim 1, which contains an adduct (b) containing mercapto groups, which adduct has been produced by reaction of 1 mol of a diglycidyl compound with 2 mols of an aliphatic or aromatic dimercapto compound.
Claim 10
Dependent Claim
27 words
A mixture according to claim 8, which contains an adduct (b) containing mercapto groups, which adduct has been produced with the use of an aliphatic dimercapto compound.
Claim 11
Dependent Claim
37 words
A mixture according to claim 9, which contains an adduct (b) containing mercapto groups, which adduct has been produced with the use of an aliphatic dimercapto compound having not more than 12 C atoms in the molecule.
References Cited (Backward Citations)
US2849416A
Cited
US3355512A
Cited
US3472913A
Cited
US3670046A
Cited
US3746685A
Cited
US3978151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |