US5492981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casting resin of epoxyalkylsiloxane, epoxy resin and anhyride
Assignee: Siemens AG
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Filing: 1994-08-24
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Granted: 1996-02-20
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Expires: 2014-08-24
Abstract
Abstract A casting resin system containing epoxyalkylsiloxane is provided for covering optoelectronic components. The casting resin system includes a resin constituent containing a mixture of epoxyalkylsiloxanes and cycloaliphatic epoxy resins. The casting resin system can be hardened with a polycarboxylic acid anhydride as a hardener component to form molding materials that are transparent and color-stable.
Inventors
- 👤 Klaus Hoehn
- 👤 Ulrike Reeh
- 👤 Ernst Wipfelder
- 👤 Guenther Waitl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:44
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/24; C08L; C08L63/00; C08G59/32; C08G59/38; C08G59/40; C08G59/42; C08G59/4284; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/49; C08K5/51; C08K5/53; C08L83/00; C08L83/04; C08L83/06; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/40; H10; H10H; H10H20/00; H10H20/80; H10H20/85; H10H20/852; H10H20/854
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
131 words
A casting resin system containing epoxyalkylsiloxane comprising: a resin constituent including approximately 5% to 95% by weight of an epoxyalkylsiloxane and approximately 95% to 5% by weight of an epoxy resin, the epoxyalkylsiloxane is a condensation product of an epoxyalkoxysilane having a general formula (1) and a silanol having a general formula (2) reacted in ##STR4## wherein R1 is an alkyl radical having one to six carbon atoms or an aryl radical; R2 is a glycidyloxy alkyl, an epoxyalkyl or an epoxycycloalkyl radical; and R3 are independently selected from OR1, R2, an alkyl, or an aryl radical; R4 is an alkyl or an aryl; R5 are independently selected from OH or R4; and n is a whole number with 1≦n≦12; and a hardener constituent including at least one polycarboxylic acid anhydride.
Claim 2
Dependent Claim
131 words
A casting resin system containing epoxyalkylsiloxane comprising: a resin constituent including approximately 5% to 95% by weight of an epoxyalkylsiloxane and approximately 95% to 5% by weight of an epoxy resin, the epoxyalkylsiloxane is a condensation product of an epoxyalkoxysilane having a general formula (1) and a silanol having a general formula (2) reacted in ##STR4## wherein R1 is an alkyl radical having one to six carbon atoms or an aryl radical; R2 is a glycidyloxy alkyl, an epoxyalkyl or an epoxycycloalkyl radical; and R3 are independently selected from OR1, R2, an alkyl, or an aryl radical; R4 is an alkyl or an aryl; R5 are independently selected from OH or R4; and n is a whole number with 1≦n≦12; and a hardener constituent including at least one polycarboxylic acid anhydride.
Claim 3
Dependent Claim
30 words
The casting resin system of claim 1 wherein the polycarboxylic acid anhydride is selected from the group consisting of: aromatic and cycloaliphatic dicarboxylic acid anhydrides and aromatic tetracarboxylic acid anhydrides.
Claim 4
Dependent Claim
20 words
The casting resin system of claim 1 wherein the polycarboxylic acid anhydride is at least partially esterified with an alcohol.
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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) | 1999-02-19 | 1999-08-21 | 2000-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-19 | 2003-08-21 | 2004-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-19 | 2007-08-21 | 2008-02-20 | $7700.00 | Window Closed / Lapsed |