US3625918A
Expired / Lapsed
US
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Adducts of polyepoxides and cycloaliphatic diprimary diamines and as curing agents in epoxy resin compositions
Assignee: BASF Schweiz AG
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Filing: 1968-06-18
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Granted: 1971-12-07
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Expires: 1988-06-18
Abstract
Abstract Process for the manufacture of new adducts of polyepoxides and polyamines suitable for use as curing agents for epoxy resins characterized in that (1) a 1,2-polyepoxide compound is reacted with (2) a cycloaliphatic-aliphatic diprimary diamine in which the first primary amino group is located on an aliphatic sidechain and the second primary amino group is bonded to an endocyclic carbon atom of the cycloaliphatic ring, in a quantity ratio of 0.6 to 1.2 mols, preferably 0.7 to 1.0 mols, of the diamine (2) per 1 epoxide equivalent of the polyepoxide compound (1), with heating.
Inventors
- 👤 Alfred Heer
- 👤 Peter Ruf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:33
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/182; C08G59/184
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
18 words
An adduct according to claim 1, wherein the diamine (2) used in the adduct formation is a 1,8-diamino-p-methane.
Claim 2
Dependent Claim
27 words
An adduct according to claim 1, where the diamine (2) used in the adduct formation is a member selected from the group consisting of 3-aminomethyl-3,5,5-trimethylcyclo-hexylamine and 2-aminomethyl-cyclopentylamine.
Claim 3
Dependent Claim
20 words
An adduct according to claim 1, wherein the 1,2-polyepoxide compound (1) used in the adduct formation is an alicyclic polyepoxide.
Claim 4
Dependent Claim
23 words
An adduct according to claim 1, wherein the 1,2-polyepoxide compound (1) used in the adduct formation is a polyglycidyl ether of a polyphenol.
Claim 5
Dependent Claim
34 words
An adduct according to claim 1 which is formed from a blend where about 0.7 to 1.0 mol of the diamine (2) is present for one epoxide group equivalent of the polyepoxide compound (1).
Claim 6
Dependent Claim
34 words
An adduct according to claim 1 which is formed by heating a blend of (1) a 1,2-polyepoxide compound and (2 ) a cycloaliphatic-aliphatic diprimary diamine in the temperature range of 60* to 180* C.
Claim 7
Dependent Claim
96 words
A curable composition of matter which comprises (a) a 1,2-polyepoxy resin and (b) as curing agent an adduct prepared by heating a blend of (1) a 1,2-polyepoxide compound and (2) a cycloaliphatic-aliphatic diprimary diamine in which the first primary amino group is located on an aliphatic side-chain and the second primary amino group is bonded to an endocyclic carbon atom of the cycloaliphatic ring, with the proviso that in the blend used for the adduct formation 0.6 to 1.2 mol of the diamine (2) are present for one epoxide group equivalent of the polyglycidyl compound (1).
Claim 8
Dependent Claim
29 words
A curable composition according to claim 8 which contains as further ingredient a member selected from the group consisting of a monophenol and a polyphenol as a curing accelerator.
Claim 9
Dependent Claim
103 words
A storage-stable single component system capable of curing by forming moulding compositions, which comprises (a) an 1,2-polyepoxy resin and (b) as curing agent an adduct prepared by heating a blend of (1) a 1,2-polyepoxide compound and (2) a cycloaliphatic-aliphatic diprimary diamine in which the first primary amino group is located on an aliphatic side-chain and the second primary amino group is bonded to an endocyclic carbon atom of the cycloaliphatic ring, with the proviso that in the blend used for the adduct formation 0.6 to 1.2 mol of the diamine (2) are present for one epoxide group equivalent of the polyglycidyl compound (1).
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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |