US4749614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for coating fibers, use thereof, and product
Assignee: International Business Machines Corp
•
Filing: 1986-04-10
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Granted: 1988-06-07
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Expires: 2006-04-10
Abstract
Abstract A fibrous substrate is coated with a hydrolyzed aminosilane. The aminosilane is hydrolyzed in an aqueous solution having a pH of 3.4 to 3.7. The substrate is useful for preparing fiber reinforced plastics such as prepreg polyepoxide substrates. Improved adhesion between the fibrous substrate and the polymer is obtained.
Inventors
- 👤 George L. Andrews
- 👤 Anilkumar C. Bhatt
- 👤 Donald E. Doran
- 👤 Leo E. Hunsinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:50
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/0366; C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/40; H05K2201/00; H05K2201/02; H05K2201/0203; H05K2201/0206; H05K2201/0239; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31525; Y10T428/31652; Y10T428/31663; Y10T442/00; Y10T442/20; Y10T442/2344; Y10T442/30; Y10T442/3472; Y10T442/3504; Y10T442/3512; Y10T442/3602; Y10T442/3667
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
41 words
A method of coating a fibrous substrate with an aminosilane coupling agent which comprises hydrolyzing said coupling agent in an acidic aqueous solution having a pH of 3.4 to 3.7 and then coating said fibrous substrate with the hydrolyzed coupling agent.
Claim 2
Independent Claim
41 words
A method of coating a fibrous substrate with an aminosilane coupling agent which comprises hydrolyzing said coupling agent in an acidic aqueous solution having a pH of 3.4 to 3.7 and then coating said fibrous substrate with the hydrolyzed coupling agent.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein said fibrous substrate is fiberglass.
Claim 4
Dependent Claim
40 words
The method of claim 1 wherein said silane is an aminosilane represented by the formula: ##STR2## wherein R' is a hydrocarbon group and R is an amino-substituted alkyl radical wherein the alkyl groups have from 1 to 6 carbon atoms.
Claim 5
Dependent Claim
17 words
The method of claim 6 wherein R' is an alkyl group of 1 to 6 carbon atoms.
Claim 6
Dependent Claim
12 words
The method of claim 1 wherein said silane contains N(vinylbenzylaminoethyl)gamma aminopropyltrimethoxy silane.
Claim 7
Dependent Claim
26 words
The method of claim 1 wherein said aqueous solution contains an acid selected from the group of acetic acid, formic acid, oxalic acid, or mixtures thereof.
Claim 8
Dependent Claim
10 words
The method of claim 6 wherein acid includes formic acid.
Claim 9
Dependent Claim
21 words
The method of claim 1 wherein the pH of the aqueous solution during the coating is about 3.4 to about 4.0.
Claim 10
Dependent Claim
18 words
The method of claim 1 wherein the hydrolysis is carried out at about normal room temperature and controlled.
Claim 11
Dependent Claim
22 words
The method of claim 1 wherein the amount of silane is at least about 0.1% by weight based upon the fibrous substrate.
Claim 12
Dependent Claim
10 words
Coated fibrous substrate obtained by the method of claim 1.
Claim 13
Independent Claim
59 words
A method for fabricating a composite of a synthetic polymer reinforced with fibers which comprises coating said fibers with an aminosilane coupling agent which comprises hydrolyzing said coupling agent in an acidic aqueous solution having a pH of 3.4 to 3.7, then applying said coupling agent to the fibers, and then coating the coated fibers with the synthetic polymer.
Claim 14
Independent Claim
59 words
A method for fabricating a composite of a synthetic polymer reinforced with fibers which comprises coating said fibers with an aminosilane coupling agent which comprises hydrolyzing said coupling agent in an acidic aqueous solution having a pH of 3.4 to 3.7, then applying said coupling agent to the fibers, and then coating the coated fibers with the synthetic polymer.
Claim 15
Dependent Claim
11 words
The method of claim 12 wherein said fibers are glass fibers.
Claim 16
Dependent Claim
11 words
The method of claim 12 wherein said polymer is a polyepoxide.
Claim 17
Dependent Claim
12 words
The method of claim 14 wherein said polyepoxide is a brominated polyepoxide.
Claim 18
Dependent Claim
40 words
The method of claim 12 wherein said silane is an aminosilane represented by the formula: ##STR3## wherein R' is a hydrocarbon group and R is an amino-substituted alkyl radical wherein the alkyl groups have from 1 to 6 carbon atoms.
Claim 19
Dependent Claim
17 words
The method of claim 16 wherein R' is an alkyl group of 1 to 6 carbon atoms.
Claim 20
Dependent Claim
12 words
The method of claim 12 wherein said silane contains N(vinylbenzylaminoethyl)gamma aminopropyltrimethoxy silane.
Claim 21
Dependent Claim
26 words
The method of claim 12 wherein said aqueous solution contains an acid selected from the group of acetic acid, formic acid, oxalic acid, or mixtures thereof.
Claim 22
Dependent Claim
10 words
The method of claim 19 wherein acid includes formic acid.
Claim 23
Dependent Claim
21 words
The method of claim 12 wherein the pH of the aqueous solution during the coating is about 3.4 to about 4.0.
Claim 24
Dependent Claim
16 words
The method of claim 12 wherein the hydrolysis is carried out at about normal room temperature.
Claim 25
Dependent Claim
21 words
The method of claim 12 wherein the amount of silane is at least about 0.1% by weight based upon the fibers.
Claim 26
Dependent Claim
24 words
The method of claim 14 wherein the amount of epoxy is about 25% to about 65% by weight based upon the amount of fibers.
Claim 27
Dependent Claim
14 words
The method of claim 14 which further includes curing the epoxy to the B-stage.
Claim 28
Dependent Claim
23 words
The method of claim 25 wherein said curing is carried out by heating at temperatures between about 160° C. to about 200° C.
Claim 29
Dependent Claim
9 words
A composite obtained by the composite of claim 12.
Claim 30
Dependent Claim
74 words
A process for preparing a laminate which comprises hydrolyzing an aminosilane coupling agent in an acidic aqueous solution having a pH of 3.4 to 3.7, then applying said coupling agent to the fibrous substrate at pH 3.4 to 4.0, then coating the substrate with a composition containing a polyepoxide, curing the epoxide to its B-stage and pressing together multiple layers of the substrate containing the silane and polyepoxide; and then further curing the epoxy.
Claim 31
Dependent Claim
74 words
A process for preparing a laminate which comprises hydrolyzing an aminosilane coupling agent in an acidic aqueous solution having a pH of 3.4 to 3.7, then applying said coupling agent to the fibrous substrate at pH 3.4 to 4.0, then coating the substrate with a composition containing a polyepoxide, curing the epoxide to its B-stage and pressing together multiple layers of the substrate containing the silane and polyepoxide; and then further curing the epoxy.
Claim 32
Dependent Claim
71 words
A process for preparing a laminate which comprises hydrolyzing an aminosilane coupling agent in an acidic aqueous solution having a pH of 3.4 to 3.7; then applying said coupling agent to the fibrous substrate at a pH of 3.4 to 4.0; then coating the substrate with a composition containing a thermosetting polymer, pressing together multiple layers of the substrate containing the silane and thermosetting polymer; and then curing the thermosetting polymer.
Claim 33
Dependent Claim
71 words
A process for preparing a laminate which comprises hydrolyzing an aminosilane coupling agent in an acidic aqueous solution having a pH of 3.4 to 3.7; then applying said coupling agent to the fibrous substrate at a pH of 3.4 to 4.0; then coating the substrate with a composition containing a thermosetting polymer, pressing together multiple layers of the substrate containing the silane and thermosetting polymer; and then curing the thermosetting polymer.
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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) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |