US4131707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable resin solutions containing compounds having at least one furyl radical
Assignee: BASF Corp
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Filing: 1976-11-08
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Granted: 1978-12-26
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Expires: 1996-11-08
Abstract
Abstract The invention relates to solutions which are stable on storage and which contain curable mixtures of polymaleimides, comonomers for these polymaleimides and, optionally, polymerization catalysts and compounds which contain at least one furyl radical, preferably furfuryl alcohol. The solutions are used for the manufacture of crosslinked polymers containing imide groups. Usually a substrate is impregnated with the solution. After drying, curing is carried out at 100 to 300° C. Using a known method, for example, glass fibre fabric is subjected to hot pressing together with a copper foil, curing being effected. This gives correspondingly copper-coated laminated sheets which are outstandingly suitable for the manufacture of printed circuits.
Inventors
- 👤 Abdul-Cader Zahir
- 👤 Sigfried Wyler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:58
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/14; B32B15/20; B32B7/00; B32B7/04; B32B7/12; C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/12; B32B2262/00; B32B2262/10; B32B2262/101; B32B2311/00; B32B2311/12; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/0346; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31623; Y10T428/31678; Y10T428/31681; Y10T428/31721; Y10T442/00; Y10T442/30; Y10T442/3382; Y10T442/3415
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
123 words
In a solution which contains a curable mixture of (1) imide or amide-carboxylic acid which contains in the molecule at least one of the radicals of the formulae ##STR17## in which D denotes a divalent radical containing a carbon-carbon double bond, (2) comonomers of said imide or amide-carboxylic acid selected from the group consisting of polyprimary amine, polyhydric phenol, polyhydric alcohol, poly carboxylic acid, alkenylphenol,alkenylphenol ether, and an azo methine, or a mixture of these substances and, optionally, (3) ionic or free-radical polymerization catalysts, the improvement which comprises adding to said solution a compound which contains at least one furyl radical in an amount such that there are 0.05 to 10 equivalent of said compound per 1 equivalent of imide or amide-carboxylic acid.
Claim 2
Dependent Claim
123 words
In a solution which contains a curable mixture of (1) imide or amide-carboxylic acid which contains in the molecule at least one of the radicals of the formulae ##STR17## in which D denotes a divalent radical containing a carbon-carbon double bond, (2) comonomers of said imide or amide-carboxylic acid selected from the group consisting of polyprimary amine, polyhydric phenol, polyhydric alcohol, poly carboxylic acid, alkenylphenol,alkenylphenol ether, and an azo methine, or a mixture of these substances and, optionally, (3) ionic or free-radical polymerization catalysts, the improvement which comprises adding to said solution a compound which contains at least one furyl radical in an amount such that there are 0.05 to 10 equivalent of said compound per 1 equivalent of imide or amide-carboxylic acid.
Claim 3
Dependent Claim
47 words
A solution according to claim 1, which contains the imides or the amidecarboxylic acids and the comonomers in a ratio such that there are 0.1 to 1.5 equivalents of comonomer per 1 equivalent of imide of the formula I or of amidecarboxylic acid of the formula II.
Claim 4
Dependent Claim
24 words
A solution according to claim 1, which contains, as imides or amidecarboxylic acids of the formulae I and II respectively, maleimides or maleimidecarboxylic acids.
Claim 5
Dependent Claim
34 words
A solution according to claim 1, wherein the curable mixture contains the imides or amidecarboxylic acids of the formulae I and II respectively and the comonomers wholly or partially in the form of prepolymers.
Claim 6
Dependent Claim
15 words
A solution according to claim 1 containing from 5% to 90% by weight of solids.
Claim 7
Dependent Claim
10 words
A solution according to claim 1 which contains a solvent.
Claim 8
Dependent Claim
33 words
A solution according to claim 6, wherein the compounds which contain at least one furyl radical in the molecule are liquid and make up 0.5 to 100% by weight of the solvent used.
Claim 9
Dependent Claim
25 words
A solution according to claim 6, wherein the solvent contains furfuryl alcohol as the compound which contains at least one furyl radical in the molecule.
Claim 10
Dependent Claim
11 words
A solution according to claim 6, which contains only organic solvents.
Claim 11
Dependent Claim
49 words
A method of coating for the manufacture of a crosslinked polymer containing imide groups, wherein a substrate, is impregnated or coated with a solution according to claim 1, the solvent is then evaporated and, finally, curing and crosslinking are carried out, at temperatures of between 100° and 300° C.
Claim 12
Dependent Claim
59 words
A method of coating wherein a substrate and, optionally, the surface of a body made of metal are impregnated or coated with a solution according to claim 1 and a firm adhesive bond is then produced between the two bodies by curing at temperatures of between 100° and 300° C., whilst pressing the substrate and the metal body together.
Claim 13
Dependent Claim
44 words
A method according to claim 11, wherein fibres, woven fabrics, or non-woven fabrics, are employed as the substrate and these are subjected, in the form of prepregs, stacked in several layers one on top of the other, to hot pressing with a metal foil.
Claim 14
Dependent Claim
33 words
A method according to claim 12, wherein the metal foil employed is an electrolytic copper foil which has been modified by a layer of brass applied to the surface by means of electroplating.
Claim 15
Dependent Claim
54 words
A copper-coated laminate sheet which consists of polymers containing imide groups and of glass fibre substrates and in which the adhesive bond has been produced in accordance with claim 12, wherein the adhesive strength between the copper foil and the laminate sheet in accordance with NEMA LI 1-1971 is from 3.0 to 5.0 kp/in.
References Cited (Backward Citations)
US3435003A
Cited
FR1555564A
Cited
US3576691A
Cited
US3582458A
Cited
US3887582A
Cited
US3700538A
Cited
US3898363A
Cited
US3822175A
Cited
US3778411A
Cited
US3930097A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |