US4397998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable epoxy compositions suitable for use in RIM processes
Assignee: Resolution Performance Products LLC
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Filing: 1981-12-14
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Granted: 1983-08-09
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Expires: 2001-12-14
Abstract
Abstract The present invention provides a rapid curing epoxy composition, suitable for RIM processes, which exhibits unexpectedly high modulus and strength and stability which comprises (1) an epoxy resin, (2) a polyamine or polyamide, (3) a catalyst selected from the group consisting of alkali and alkaline earth metal salts of selected acids, and (4) a polyalkylene ether glycol.
Inventors
- 👤 Harold E. De La Mare
- 👤 Thomas F. Brownscombe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:37
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08F; C08F283/00; C08F283/10; C08G59/40; C08G59/44; C08G59/50; C08L; C08L63/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
76 words
A rapid curing, storage stable, thermosetting composition, especially suitable for use in reaction injection molding processes comprising (1) an epoxy compound containing more than one vicinal epoxy group, (2) a curing amount of at least one amino compound containing at least three amino hydrogens, (3) a catalytic amount of lithium nitrate or calcium nitrate, and (4) from about 0.1 to about 3 parts of a polyalkylene ether glycol per 100 parts by weight of epoxy compound.
Claim 2
Dependent Claim
76 words
A rapid curing, storage stable, thermosetting composition, especially suitable for use in reaction injection molding processes comprising (1) an epoxy compound containing more than one vicinal epoxy group, (2) a curing amount of at least one amino compound containing at least three amino hydrogens, (3) a catalytic amount of lithium nitrate or calcium nitrate, and (4) from about 0.1 to about 3 parts of a polyalkylene ether glycol per 100 parts by weight of epoxy compound.
Claim 3
Dependent Claim
17 words
The composition of claim 1 wherein the epoxy compound is a glycidyl polyether of a polyhydric phenol.
Claim 4
Dependent Claim
15 words
The composition of claim 2 wherein the epoxy compound is a glycidyl polyether of 2,2-bis(4-hydroxyphenyl)propane.
Claim 5
Dependent Claim
27 words
The composition of claim 2 wherein the epoxy compound is a blend of (a) a glycidyl polyether of 2,2-bis(4-hydroxyphenyl)propane and (b) a glycidyl polyether of hydrogenated 2,2-bis(4-hydroxyphenyl)propane.
Claim 6
Dependent Claim
13 words
The composition of claim 1 wherein the amino compound is a cycloaliphatic amine.
Claim 7
Dependent Claim
13 words
The composition of claim 5 wherein the cycloaliphatic diamine is hydrogenated methylene dianiline.
Claim 8
Dependent Claim
11 words
The composition of claim 5 wherein the cycyloaliphatic diamine is 1,2-diaminocyclohexane.
Claim 9
Dependent Claim
12 words
The composition of claim 1 wherein the amino compound is a polyamide.
Claim 10
Dependent Claim
22 words
The composition of claim 8 wherein the polyamide is an adduct of a polymeric fatty acid and triethylamine tetramine or diethylene triamine.
Claim 11
Dependent Claim
30 words
The composition of claim 1 wherein the amino compound is a blend of hydrogenated methylene dianiline and an adduct of a polymeric fatty acid and triethylene tetramine or diethylene triamine.
Claim 12
Dependent Claim
14 words
The composition of claim 1 wherein the catalyst is Ca(NO 3 ) 2 .
Claim 13
Dependent Claim
12 words
The composition of claim 1 wherein the catalyst is LiNO 3 .
Claim 14
Dependent Claim
14 words
The composition of claim 1 wherein the polyalkylene ether glycol is a polyethylene glycol.
Claim 15
Dependent Claim
20 words
The composition of claim 13 wherein the polyethylene glycol has an average molecular weight of from about 200 to 600.
Claim 16
Dependent Claim
27 words
The composition of claim 1 wherein the catalyst is employed in amounts from about 0.05 to about 5.0 parts per 100 parts by weight of epoxy compound.
Claim 17
Dependent Claim
22 words
The composition of claim 1 wherein the weight ratio of catalyst to polyalkylene ether glycol is from about 1:1 to about 1:5.
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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) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |