US3914288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction products of polyepoxides, mercaptoalkanoic acid esters and amines
Assignee: Novartis AG
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Filing: 1972-03-15
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Granted: 1975-10-21
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Expires: 1992-03-15
Abstract
Abstract As curing agents for epoxy resins adducts obtained by reaction of A. A POLYEPOXIDE HAVING, PER AVERAGE MOLECULE, MORE THAN ONE 1,2-EPOXIDE GROUP OF THE FORMULA directly attached to oxygen, to nitrogen, or to sulphur, where R and R1 each represent hydrogen or together represent -CH2CH2, b. a polymercaptan containing at least one pair of -SH groups in which one -SH group is separated from the other by a chain of at least 6 carbon, or carbon and oxygen, atoms, and C. AN AMINE.
Inventors
- 👤 Edward William Garnish
- 👤 Clifford George Haskins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:09
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/66; C08G59/182; C08G59/50; C08G59/56
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
20 words
ADDUCTS OBTAINING BY REACTION OF A. A POLYEPOXIDE HAVING, PER AVERAGE MOLECULE, MORE THAN ONE 1,2-EPOXIDE GROUP OF THE FORMULA
Claim 2
Dependent Claim
20 words
ADDUCTS OBTAINING BY REACTION OF A. A POLYEPOXIDE HAVING, PER AVERAGE MOLECULE, MORE THAN ONE 1,2-EPOXIDE GROUP OF THE FORMULA
Claim 3
Dependent Claim
26 words
Adducts according to claim 1, wherein the polymercaptan (b) provides from 1.5 to 2.5 -SH equivalents per equivalent said 1, 2-epoxide group of the polyepoxide (a).
Claim 4
Dependent Claim
26 words
Adducts according to claim 1, wherein the amine (c) provides from 0.05 to 0.15 active hydrogen equivalent per equivalent said 1,2-epoxide group of the polyepoxide (a).
Claim 5
Dependent Claim
14 words
Adducts according to claim 1, wherein reaction is effected at from 50*C to 100*C.
Claim 6
Dependent Claim
21 words
Adducts according to claim 1, wherein the 1,2-epoxide groups of formula I in the polyepoxide (a) are further of the formula
Claim 7
Dependent Claim
22 words
Adducts according to claim 5, wherein the polyepoxide (a) is a polyglycidyl ether of a polyhydric phenol or of a polyhydric alcohol.
Claim 8
Dependent Claim
18 words
Adducts according to claim 5, wherein the polyepoxide (a) is a polyglycidyl ester of a cycloaliphatic polycarboxylic acid.
Claim 9
Dependent Claim
20 words
Adducts according to claim 1, wherein the polyepoxide (a) has a 1,2-epoxide content of at least 2 equivalents per kilogram.
Claim 10
Dependent Claim
37 words
Adducts according to claim 1, wherein the polymercaptan (b) is an ester of a polyoxypropylene glycol or a polyoxypropylene triol, having an average molecular weight within the range 300 to 2500, with thioglycollic acid or 3-mercaptopropionic acid.
Claim 11
Dependent Claim
17 words
Adducts according to claim 1 wherein the amine (c) contains at least one amino group of formula
Claim 12
Dependent Claim
15 words
Adducts according to claim 1 wherein the amine (c) is N,N-dimethylpropane-1,3-diamine, N,N-diethylpropane-1,3-diamine, n-butylamine, or triethylenetetramine.
Claim 13
Dependent Claim
16 words
Adducts according to claim 1, having a 1,2-epoxide content of less than 0.05 equivalent per kilogram.
Claim 14
Dependent Claim
16 words
Adducts according to claim 1, having a 1,2-epoxide content of less than 0.2 equivalent per kilogram.
Claim 15
Dependent Claim
30 words
Adducts according to claim 1 obtained by reaction of a. 20g of a polyglycidyl ether of bisphenol-A containing 5-5.2 epoxide equival/kg.; b. 80g of a thioalkanoic ester of the formula
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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |