US4020225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal clad laminate composed of flame resistant thermosetting resin composition
Assignee: Maruzen Petrochemical Co Ltd
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Filing: 1975-11-18
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Granted: 1977-04-26
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Expires: 1995-11-18
Abstract
Abstract A thermosetting resin composition having excellent flame resistance and thermal stability comprising an epoxy resin and a halogenated polyhydroxystyrene and a metal clad laminate comprising at least one planar base material having impregnated therein the above-described flame resistant thermosetting resin composition and at least one metal foil laminated thereon.
Inventors
- 👤 Hiroshi Fujiwara
- 👤 Hiroshi Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:27
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/14; B32B15/20; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/034; B32B2260/00; B32B2260/02; B32B2260/021; B32B2262/00; B32B2262/06; B32B2262/062; B32B2262/067; B32B2262/10; B32B2262/101; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/3065; B32B2317/00; B32B2317/12; B32B2317/125; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S428/00; Y10S428/901; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31525; Y10T428/31551; Y10T428/31645; Y10T428/31649; Y10T428/31652; Y10T428/31656; Y10T428/31678; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31891; Y10T442/00; Y10T442/30; Y10T442/3382; Y10T442/3415
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
118 words
A metal clad laminate comprising at least one base material impregnated with a flame resistant thermosetting resin and a metal sheet or foil laminated on at least one side of said base material, said thermosetting resin composition comprising: i. an epoxy resin comprising an epoxy compound having at least two epoxy groups per molecule, and ii. a halogenated polyhydroxystyrene or a mixture of a halogenated polyhydroxystyrene and polyhydroxystyrene, wherein the halogenated polyhydroxystyrene has a mean degree of polymerization of from about 2 to 10,000 and the equivalent ratio of the number of hydroxyl groups in the halogenated polyhydroxystyrene and polyhydroxystyrene to the number of epoxy groups in the epoxy resin is in the range of 0.3 to 10.
Claim 2
Dependent Claim
118 words
A metal clad laminate comprising at least one base material impregnated with a flame resistant thermosetting resin and a metal sheet or foil laminated on at least one side of said base material, said thermosetting resin composition comprising: i. an epoxy resin comprising an epoxy compound having at least two epoxy groups per molecule, and ii. a halogenated polyhydroxystyrene or a mixture of a halogenated polyhydroxystyrene and polyhydroxystyrene, wherein the halogenated polyhydroxystyrene has a mean degree of polymerization of from about 2 to 10,000 and the equivalent ratio of the number of hydroxyl groups in the halogenated polyhydroxystyrene and polyhydroxystyrene to the number of epoxy groups in the epoxy resin is in the range of 0.3 to 10.
Claim 3
Dependent Claim
24 words
The metal clad laminate as claimed in claim 1, wherein said halogenated polyhydroxystyrene has a halogen content of about 15 to 70% by weight.
Claim 4
Dependent Claim
17 words
The metal clad laminate as claimed in claim 1, wherein said halogenated polyhydroxystyrene is a brominated polyhydroxystyrene.
Claim 5
Dependent Claim
76 words
The metal clad laminate as claimed in claim 1, wherein said epoxy resin is a bisphenol type epoxy resin, a novolac type epoxy resin, a resole type epoxy resin, a polyphenol type epoxy resin, a polyhydroxybenzene type epoxy resin, a polyglycol type epoxy resin, an aromatic carboxylic acid type epoxy resin, an aliphatic carboxylic acid type epoxy resin, an alicyclic epoxy resin, a nitrogen-containing epoxy resin, a diene type epoxy resin, or a metal-containing epoxy resin.
Claim 6
Dependent Claim
19 words
The metal clad laminate as claimed in claim 1, wherein said thermosetting resin composition further contains a hardening accelerator.
Claim 7
Dependent Claim
22 words
The metal clad laminate as claimed in claim 5, wherein said hardening accelerator is dimethylaminobenzaldehyde, dimethylbenzylamine, triethanolamine, diethylenetriamine, urea, dicyandiamide, or dimethylformamide.
Claim 8
Dependent Claim
21 words
The metal clad laminate as claimed in claim 1, wherein said metal sheet or foil is a copper sheet or foil.
Claim 9
Dependent Claim
29 words
The metal clad laminate as claimed in claim 1, wherein said base material impregnated with said thermosetting resin composition is a paper, a glass cloth, or an asbestos paper.
Claim 10
Dependent Claim
17 words
The metal clad laminate as claimed in claim 1, wherein said equivalent ratio is 0.5 to 5.
Claim 11
Dependent Claim
38 words
The metal clad laminate as claimed in claim 1, wherein said thermosetting resin composition further comprises a plasticizer in an amount of from 0.5 to 20 weight % based on the weight of the resins in the composition.
Claim 12
Dependent Claim
28 words
The metal clad laminate as claimed in claim 1, wherein an adhesive is present between said base material and said metal sheet or foil to effect said lamination.
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) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |