US4146701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyether diureide epoxy additives
Assignee: Huntsman Corp
•
Filing: 1978-03-27
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Granted: 1979-03-27
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Expires: 1998-03-27
Abstract
Abstract An epoxy resin having superior resistance to thermal shock comprises a vicinal polyepoxide, a curing amount of a certain bicyclic anhydride and an effective amount of an additive comprising a polyoxyalkylenepolyamine-maleic anhydride condensation product having thioureide, ureide or thioformamide or formamide end groups.
Inventors
- 👤 Harold G. Waddill
- 👤 Heinz Schulze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:28
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/44; C08G59/4007; C08G59/4014; C08G59/4021; C08G59/42; C08G59/4284
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
71 words
An epoxy resin composition having superior resistance to thermal shock and being the cured product of a curable admixture which comprises: a vicinal polyepoxide having an average of at least 1.8 reactive, 1,2-epoxy groups per molecule; a curing amount of a substituted bicyclic vicinal dicarboxylic anhydride curing agent; and, an effective amount of a succinimide additive comprising a polyoxyalkyleneopolyamine-maleic anhydride condensation product having thioureide, ureide or thioformamide or formamide end groups.
Claim 2
Dependent Claim
71 words
An epoxy resin composition having superior resistance to thermal shock and being the cured product of a curable admixture which comprises: a vicinal polyepoxide having an average of at least 1.8 reactive, 1,2-epoxy groups per molecule; a curing amount of a substituted bicyclic vicinal dicarboxylic anhydride curing agent; and, an effective amount of a succinimide additive comprising a polyoxyalkyleneopolyamine-maleic anhydride condensation product having thioureide, ureide or thioformamide or formamide end groups.
Claim 3
Dependent Claim
18 words
The composition of claim 1 further comprising an effective amount of a composition effective in accelerating the cure.
Claim 4
Dependent Claim
19 words
The composition of claim 1 wherein the anhydride is the Diels-Alder adduct of malic anhydride and a substituted cyclopentadiene.
Claim 5
Dependent Claim
21 words
The composition of claim 1 wherein said anhydride curing agents are of the formula: ##STR3## wherein R is a lower alkyl.
Claim 6
Dependent Claim
32 words
The composition of claim 1 wherein the succinimide additive is of the formula: ##STR4## where Y is S or O X is NH 2 or H and R is a polyoxyalkylene radical.
Claim 7
Dependent Claim
14 words
The composition of claim 5 wherein X is NH 2 and Y is O.
Claim 8
Dependent Claim
22 words
The composition of claim 1 wherein said vicinal polyepoxide is more than 80% by weight of a polyglycidyl ether of polyhydric phenols.
Claim 9
Dependent Claim
16 words
The composition of claim 7 wherein said vicinal polyepoxide is polyglycidyl ether of a polyhydric phenol.
Claim 10
Independent Claim
80 words
A method for increasing the adhesive strength of an epoxy resin composition, being the cured product of a curable admixture comprising a vicinal polyepoxide having an average of at least 1.8 reactive 1,2-epoxy groups per molecule; and, a curing amount of a substituted bicyclic vicinal dicarboxylic anhydride curing agent comprising the step of: adding to said curable admixture an effective amount of a succinimide additive comprising a polyoxyalkylenepolyamine-maleic anhydride condensation product having thiouride, ureide or thioformamide or formamide end groups.
Claim 11
Independent Claim
80 words
A method for increasing the adhesive strength of an epoxy resin composition, being the cured product of a curable admixture comprising a vicinal polyepoxide having an average of at least 1.8 reactive 1,2-epoxy groups per molecule; and, a curing amount of a substituted bicyclic vicinal dicarboxylic anhydride curing agent comprising the step of: adding to said curable admixture an effective amount of a succinimide additive comprising a polyoxyalkylenepolyamine-maleic anhydride condensation product having thiouride, ureide or thioformamide or formamide end groups.
Claim 12
Dependent Claim
32 words
The method of claim 9 wherein the succinimide additive is of the formula: ##STR5## where Y is S or O X is NH 2 or H and R is a polyoxyalkylene radical.
Claim 13
Dependent Claim
14 words
The method of claim 10 wherein X is NH 2 and Y is O.
Claim 14
Dependent Claim
11 words
The method of claim 10 wherein R is a polyoxypropylene radical.
Claim 15
Dependent Claim
22 words
The method of claim 10 wherein said curable admixture further comprises an effective amount of a composition effective in accelerating the cure.
Claim 16
Dependent Claim
22 words
The method of claim 10 wherein said vicinal polyepoxide is more than 80% by weight of a polyglycidyl ether of polyhydric phenols.
Claim 17
Dependent Claim
17 words
The method of claim 14 wherein said vicinal polyepoxide is a polyglycidyl ether of a polyhydric phenol.
Claim 18
Dependent Claim
46 words
A curable resin composition comprising a diglycidyl ether of 4,4'-isopropylidene bisphenol polyepoxide; a curing amount of a substituted bicyclic vicinal dicarboxylic anhydride curing agent and, an effective amount of an additive comprising a polyoxyalkylenepolyamine-maleic anhydride condensation product having thioureide, ureide or thioformamide or formamide end groups.
Claim 19
Dependent Claim
46 words
A curable resin composition comprising a diglycidyl ether of 4,4'-isopropylidene bisphenol polyepoxide; a curing amount of a substituted bicyclic vicinal dicarboxylic anhydride curing agent and, an effective amount of an additive comprising a polyoxyalkylenepolyamine-maleic anhydride condensation product having thioureide, ureide or thioformamide or formamide end groups.
Claim 20
Dependent Claim
42 words
The resin of claim 16 wherein said anhydride curing agent is present in about a stiochiometric amount and said anhydride additive is present in amount from about 2 to 50 parts by weight based on 100 parts by weight of said polyepoxide.
Claim 21
Dependent Claim
81 words
In an epoxy resin composition, being the cured product of a curable admixture comprising a vicinal polyepoxide having an average of at least 1.8 reactive, 1-2 epoxy groups per molecule; and a curing amount of a substituted bicyclo vicinal dicarboxylic anhydride curing agent, the improvement which comprises: increasing the thermal shock properties of said cured product by addition of an effective amount of a succinimide additive comprising a polyoxyalkylenepolyamine-maleic anhydride condensation product having thioureide ureide or thioformamide or formamide end groups.
Claim 22
Dependent Claim
81 words
In an epoxy resin composition, being the cured product of a curable admixture comprising a vicinal polyepoxide having an average of at least 1.8 reactive, 1-2 epoxy groups per molecule; and a curing amount of a substituted bicyclo vicinal dicarboxylic anhydride curing agent, the improvement which comprises: increasing the thermal shock properties of said cured product by addition of an effective amount of a succinimide additive comprising a polyoxyalkylenepolyamine-maleic anhydride condensation product having thioureide ureide or thioformamide or formamide end groups.
Claim 23
Dependent Claim
32 words
The method of claim 18 wherein the succinimide additive is of the formula: ##STR6## where Y is S or O X is NH 2 or H and R is a polyoxyalkylene radical.
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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) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |