Patent US4178274A successfully refreshed from Google Patents.
US4178274A
Expired / Lapsed
US
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Casting resin compositions for sealing opto-electronic components
Assignee: Siemens AG
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Filing: 1978-03-14
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Granted: 1979-12-11
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Expires: 1998-03-14
Abstract
Abstract Casting resin compositions for sealing opto-electronic components on the basis of quick-setting casting resin compounds, consisting of at least one epoxy compound with a cycloaliphatic base with at least two oxiran rings in the molecule, at least one carbonic acid anhydride, a zinc octoate, a low-molecular polyol and/or a low-molecular acid ester and, optionally, an organic phosphorus compound and customary brighteners and light-scattering material in powder form and pigments. Especially suitable is a zinc octoate with a zinc content of 21 to 22% by weight. The compounds are used for covering and coating light-emitting diodes, photo transistors, photo diodes and light-emitting diode displays and as light guides for opto-electronic couplers.
Inventors
- 👤 Hans Denk
- 👤 Ulrike Reeh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:47
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/40; C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/24; C08G59/40; C08G59/42; C08G59/4284; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/49; C08K5/51; C08K5/53
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
65 words
An acid anhydride-hardenable, epoxy-based casting resin composition which is liquid at room temperature comprising: (a) at least one epoxy compound having a cycloaliphatic base and at least two oxiran rings; (b) at least one carbonic acid anhydride; (c) a zinc octoate; and (d) a solvent selected from the group consisting of a low molecular weight polyol, a low molecular weight acid ester and mixtures thereof.
Claim 2
Dependent Claim
65 words
An acid anhydride-hardenable, epoxy-based casting resin composition which is liquid at room temperature comprising: (a) at least one epoxy compound having a cycloaliphatic base and at least two oxiran rings; (b) at least one carbonic acid anhydride; (c) a zinc octoate; and (d) a solvent selected from the group consisting of a low molecular weight polyol, a low molecular weight acid ester and mixtures thereof.
Claim 3
Dependent Claim
15 words
A casting resin composition according to claim 1 wherein said epoxy compound is 3,4-epoxycyclohexylmethyl-(3,4-epoxy)cyclohexane carboxylate.
Claim 4
Dependent Claim
17 words
A casting resin composition according to claim 1 wherein said epoxy compound is 2-(3,4-epoxy) cyclohexyl-5,5-spiro (3,4-epoxy) cyclohexane-m-dioxane.
Claim 5
Dependent Claim
23 words
A casting resin composition according to claim 1 wherein said epoxy compound is a mixture of 3,4-epoxycyclohexylmethyl-(3,4-epoxy)cyclohexane carboxylate and 2-(3,4 epoxy)cyclohexyl-5,5-spiro (3,4-epoxy) cyclohexane-m-dioxane.
Claim 6
Dependent Claim
17 words
A casting resin composition according to claim 1 wherein said carbonic acid anhydride is hexahydrophthalic acid anhydride.
Claim 7
Dependent Claim
27 words
A casting composition according to any of claims 1, 2, 3, 4 or 5 wherein said zinc octoate has a zinc content of about 18% by weight.
Claim 8
Dependent Claim
34 words
A casting composition according to any of claims 1, 2, 3, 4 or 5 wherein said zinc octoate has a zinc content in the range of from about 21 to about 22% by weight.
Claim 9
Dependent Claim
33 words
A casting resin composition according to any of claims 1, 2, 3, 4 or 5 wherein said low-molecular weight polyol is selected from the group consisting of trimethylol propane, 3-methylpentanediol-1,5 and mixtures thereof.
Claim 10
Dependent Claim
26 words
A casting resin composition according to any of claims 1, 2, 3, 4 or 5 wherein said low-molecular weight acid ester is hexahydrophthalic acid monoethyl ester.
Claim 11
Dependent Claim
21 words
A casting resin composition according to any of claims 1, 2, 3, 4 or 5 further comprising an organic phosphorous compound.
Claim 12
Dependent Claim
14 words
A casting resin composition according to claim 10 wherein said phosphorous compound is diphenyldecylphosphite.
Claim 13
Dependent Claim
23 words
A method for protecting the functional parts of opto-electronic components comprising covering said components with a casting resin composition according to claim 1.
Claim 14
Dependent Claim
27 words
A method according to claim 12 wherein said opto-electronic component is selected from the group consisting of light-emitting diodes, photo transistors, photo diodes and lightemitting diode displays.
Claim 15
Dependent Claim
81 words
An acid anhydride-hardenable, transparent epoxy-based casting resin composition which is liquid at room temperature and hardenable in less than five minutes at 150° C. comprising: (a) at least one epoxy compound having a cycloaliphatic base and at least two oxiran rings at the ring of said cycloaliphatic base; (b) at least one carbonic acid anhydride; (c) a zinc octoate; and (d) a solvent selected from the group consisting of low molecular weight polyols, low molecular weight acid esters and mixtures thereof.
Claim 16
Dependent Claim
81 words
An acid anhydride-hardenable, transparent epoxy-based casting resin composition which is liquid at room temperature and hardenable in less than five minutes at 150° C. comprising: (a) at least one epoxy compound having a cycloaliphatic base and at least two oxiran rings at the ring of said cycloaliphatic base; (b) at least one carbonic acid anhydride; (c) a zinc octoate; and (d) a solvent selected from the group consisting of low molecular weight polyols, low molecular weight acid esters and mixtures thereof.
Claim 17
Dependent Claim
27 words
The casting resin composition of claim 14 wherein said epoxy compound is selected from the group consisting of 3,4-epoxycyclohexylmethyl-(3,4-epoxy) cyclohexane carboxylate; 2-(3,4-epoxy) cyclohexyl-5,5-spiro-(3,4-epoxy) cyclohexane--m--dioxane and mixtures thereof.
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) | 1982-12-10 | 1983-06-11 | 1983-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-10 | 1987-06-11 | 1987-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-10 | 1991-06-11 | 1991-12-11 | $7700.00 | Window Closed / Lapsed |