Patent US4237149A successfully refreshed from Google Patents.
US4237149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing molded and impregnated parts
Assignee: Siemens AG
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Filing: 1978-08-21
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Granted: 1980-12-02
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Expires: 1998-08-21
Abstract
Abstract For manufacturing molded and impregnated parts from epoxy resin compositions, a reactive epoxy resin is employed which hardens more slowly at higher temperatures (120° to 180° C.) than at lower temperatures (80° to 110° C.). The reactive epoxy resin composition is applied at the higher temperature and subsequently hardened at the lower temperature. According to the method of the invention, molded parts (e.g., solution pump heads), cast-in electrical components (e.g., four-ring stray field electrodes) and impregnated parts are manufactured.
Inventors
- 👤 Hans Denk
- 👤 Reiner Habrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:03
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/24; B; B29; B29C; B29C39/00; B29C39/003; B29C39/22; B29C39/38; C08G; C08G59/00; C08G59/18; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/40; B29K; B29K2063/00; B29K2105/00; B29K2105/06; B29K2105/16; B29L; B29L2031/00; B29L2031/34; B29L2031/3406; B29L2031/748; B29L2031/7496; C08J2363/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
110 words
A method for casting-in or impregnating electrical components and for casting with epoxy resin compositions, comprising applying to a mold or component to be impregnated a reactive epoxy resin composition, comprised of an epoxy resin and a tertiary amine, at a temperature in the range of from about 120° C. to about 180° C., and hardening said resin composition at a temperature in the range of from about 80° C. to about 110° C., wherein said epoxy resin composition hardens more slowly in the temperature range of from about 120° C. to about 180° C. than at temperatures in the range of from about 80° C. to about 110° C.
Claim 2
Independent Claim
110 words
A method for casting-in or impregnating electrical components and for casting with epoxy resin compositions, comprising applying to a mold or component to be impregnated a reactive epoxy resin composition, comprised of an epoxy resin and a tertiary amine, at a temperature in the range of from about 120° C. to about 180° C., and hardening said resin composition at a temperature in the range of from about 80° C. to about 110° C., wherein said epoxy resin composition hardens more slowly in the temperature range of from about 120° C. to about 180° C. than at temperatures in the range of from about 80° C. to about 110° C.
Claim 3
Dependent Claim
17 words
The method according to claim 1 wherein said epoxy resin is the bisglycidyl ether of bisphenol A.
Claim 4
Dependent Claim
17 words
The method according to claim 1 wherein said reactive epoxy resin composition comprises an epoxized Novolak resin.
Claim 5
Dependent Claim
26 words
The method according to claim 1 wherein said reactive epoxy resin composition comprises a mixture of epoxized Novolak resin and the bisglycidyl ether of bisphenol A.
Claim 6
Dependent Claim
12 words
The method according to claim 1 wherein said tertiary amine comprises 2,4,6-tris-(dimethylaminomethyl)-phenol.
Claim 7
Dependent Claim
60 words
The method according to claim 1 wherein said reactive epoxy resin composition comprises about 50 parts by weight bisglycidyl ether of bisphenol A with an epoxy value between about 0.55 and 0.59, about 50 parts by weight of a bisglycidyl ether of bisphenol A having an epoxy value between about 0.2 and 0.3, and about 1.5 parts by weight 2,4,6-tris-(dimethylaminomethyl)-phenol.
Claim 8
Dependent Claim
28 words
The method according to claim 1 wherein up to about 70 parts by weight of filler are added to 30 parts by weight of reactive epoxy resin composition.
Claim 9
Dependent Claim
39 words
The method according to claim 1 wherein said reactive epoxy resin composition comprises about 100 parts by weight of a bisglycidyl ether of bisphenol A with an epoxy value of 0.50 to 0.55 and 2 parts by weight 2,4,6-tris-(dimethylaminomethyl)-phenol.
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) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |