Patent US4803115A successfully refreshed from Google Patents.
US4803115A
Expired / Lapsed
US
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Glass fiber-reinforced electrical laminates and a continuous production method therefor
Assignee: Kanegafuchi Chemical Industry Co Ltd
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Filing: 1986-09-25
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Granted: 1989-02-07
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Expires: 2006-09-25
Abstract
Abstract There is provided an electrical laminate comprising a cured assemblage of a plurality of glass fiber type substrates impregnated with a curable resin composition containing (a) a halogenated bisphenol type unsaturated polyester resin and (b) an epoxy acrylate resin which may optionally be halogen-containing. This laminate features high dimensional stability, improved through-hole reliability, and excellent mechanical strength. A continuous production method for laminates is also described.
Inventors
- 👤 Yasuo Fushiki
- 👤 Minoru Isshiki
- 👤 Hiroshi Nakano
- 👤 Masayuki Oizumi
- 👤 Masayoshi Shimomura
- 👤 Keiji Imajo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:23
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/036; C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/226; C08J; C08J5/00; C08J5/24; C08J5/241; C08J5/244; C08J5/249; C08L; C08L63/00; C08L63/10; H01; H01B; H01B3/00; H01B3/002; H01B3/18; H01B3/30; H01B3/40; H05K1/0366; H05K2201/00; H05K2201/01; H05K2201/0104; H05K2201/0133; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31518; Y10T428/31522; Y10T428/31525; Y10T428/31529; Y10T428/31551; Y10T428/31616; Y10T428/3162; Y10T428/31678; Y10T428/31786; Y10T428/31794; Y10T442/00; Y10T442/30; Y10T442/3382; Y10T442/3415; Y10T442/3431; Y10T442/3439; Y10T442/3472; Y10T442/3528; Y10T442/3537; Y10T442/3569
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
111 words
An electrical laminate comprising a cured assemblage of a plurality of glass fiber substrates impregnated with a curable resin composition consisting essentially of (a) 30 to 90 percent by weight of the entire resin composition of a mixture of an unsaturated polyester and a monomer for crosslinking said unsaturated polyester, the acid component and the glycol component of said unsaturated polyester consisting of an unsaturated polybasic carboxylic acid and a halogenated bisphenol A-ethylene or propylene oxide adduct, respectively; and (b) 10 to 70 percent by weight of an epoxy acrylate resin produced by reacting a polyepoxy compound with an equivalent quantity, relative to said epoxy compound, of acrylic or methacrylic acid.
Claim 2
Dependent Claim
111 words
An electrical laminate comprising a cured assemblage of a plurality of glass fiber substrates impregnated with a curable resin composition consisting essentially of (a) 30 to 90 percent by weight of the entire resin composition of a mixture of an unsaturated polyester and a monomer for crosslinking said unsaturated polyester, the acid component and the glycol component of said unsaturated polyester consisting of an unsaturated polybasic carboxylic acid and a halogenated bisphenol A-ethylene or propylene oxide adduct, respectively; and (b) 10 to 70 percent by weight of an epoxy acrylate resin produced by reacting a polyepoxy compound with an equivalent quantity, relative to said epoxy compound, of acrylic or methacrylic acid.
Claim 3
Dependent Claim
40 words
An electrical laminate comprising a curable resin composition as claimed in claim 1 wherein a halogenated bisphenol A-ethylene or propylene oxide adduct accounts for at least 10 mole percent of the glycol component constituting a halogenated bisphenol unsaturated polyester resin.
Claim 4
Dependent Claim
44 words
An electrical laminate comprising a curable resin composition as claimed in claim 1 wherein neopentyl glycol or a halogenated derivative thereof accounts for at least 10 mole percent of the balance of glycol component after exclusion of halogenated bisphenol A-ethylene or propylene oxide adduct.
Claim 5
Dependent Claim
43 words
An electrical laminate as claimed in claim 1 wherein a vinyl-or carboxy-terminated liquid butadiene based oligomer soluble in said curable resin composition is contained in a proportion of 1 to 10 weight parts to each 100 weight parts of said curable resin composition.
Claim 6
Dependent Claim
58 words
An electrical laminate as claimed in claim 1 wherein a metal foil is laminated to an insulating layer consisting of a plurality of glass fiber substrates impregnated with said curable resin composition, an epoxy adhesive layer containing at least 5 weight percent of a bisphenol S epoxy resin being interposed between said metal foil and said insulating layer.
Claim 7
Dependent Claim
35 words
An electrical laminate as claimed in claim 1 wherein said glass fiber substrates are a glass cloth disposed on either side of the laminate and a glass nonwoven fabric interposed therebetween as a core layer.
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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) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |