Patent US3619252A successfully refreshed from Google Patents.
US3619252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of elastomer coated glass fibers
Assignee: PPG Industries Inc
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Filing: 1966-12-29
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Granted: 1971-11-09
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Expires: 1986-12-29
Abstract
Abstract This invention relates to coating and impregnating glass fibers with an aqueous elastomer composition and then drying the glass fibers with high frequency electrical heating to move substantially all the water while leaving the elastomer solids substantially unaffected. Also encompassed herein are products produced by the foregoing process, as well as the subsequent process step of applying additional heat to cure a heat curable resin component of the coating and impregnating composition.
Inventors
- 👤 Alfred M Roscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:55
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08J5/08; B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; C03C25/27; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2971
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
26 words
The method of claim 1 wherein volatilization of the liquid components is accomplished by dielectric heating within the range of about 5 to about 3000 megacycles.
Claim 2
Dependent Claim
40 words
The method of claim 1 wherein said glass fibers are coated and impregnated with sufficient adhesive composition to produce at least 5 percent by weight of elastomeric material on the surface thereof, based on the weight of the glass fibers.
Claim 3
Dependent Claim
49 words
The method of claim 1 wherein the adhesive composition is applied in one step and the glass fibers are coated and impregnated with sufficient adhesive composition to produce at least 12 percent by weight of elastomeric material on the surface thereof, based on the weight of the glass fibers.
Claim 4
Dependent Claim
49 words
The method of claim 1 wherein the adhesive composition is applied in one step and the glass fibers are coated and impregnated with sufficient adhesive composition to produce at least 15 percent by weight of elastomeric material on the surface thereof, based on the weight of the glass fibers.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein said adhesive composition contains a resin inhibitor.
Claim 6
Dependent Claim
11 words
The method of claim 1 wherein said adhesive composition contains ammonia.
Claim 7
Dependent Claim
21 words
The method of claim 1 wherein the fiber glass is sized with a material containing a coupling agent prior to coating.
Claim 8
Dependent Claim
13 words
The method of claim 8 wherein the elastomer latex is butadiene-styrene-vinyl pyridine terpolymer.
Claim 9
Dependent Claim
13 words
The method of claim 9 wherein the heat curable resin is resorcinol formaldehyde.
Claim 10
Dependent Claim
14 words
An elastomer coated glass fiber product produced according to the method of claim 1.
Claim 11
Dependent Claim
9 words
Elastomeric material reinforced with the product of claim 11.
Claim 12
Dependent Claim
52 words
A method according to claim 1, which further comprises the steps of processing the tack-free glass fibers by at least one of the processes of winding, twisting, plying and weaving to the form desired for use in combination with elastomeric material, and then combining the processed glass fibers with said elastomeric material.
Claim 13
Dependent Claim
26 words
The method of claim 13 wherein volatilization of the liquid components is accomplished by dielectric heating within the range of about 5 to about 3000 megacycles.
Claim 14
Dependent Claim
21 words
The method of claim 13 wherein the glass fibers are sized with a material containing a coupling agent prior to coating.
Claim 15
Dependent Claim
13 words
The method of claim 15 wherein the elastomer coating is butadiene-styrene-vinyl pyridine terpolymer.
Claim 16
Dependent Claim
13 words
The method of claim 16 wherein the heat curable resin is resorcinol formaldehyde.
Claim 17
Dependent Claim
40 words
The method of claim 17 wherein said glass fibers are coated and impregnated with sufficient adhesive composition to produce at least 5 percent by weight of elastomeric material on the surface thereof, based on the weight of the glass fibers.
Claim 18
Dependent Claim
17 words
The method of claim 1 wherein said adhesive-coated glass fibers are passed vertically through said electrical field.
Claim 19
Dependent Claim
40 words
The method of claim 19 wherein said glass fibers are coated and impregnated with sufficient adhesive composition to produce at least 25 percent by weight of elastomeric material on the surface thereof, based on the weight of the glass fibers.
Claim 20
Independent Claim
147 words
A method of coating and impregnating glass fibers comprising applying an aqueous adhesive composition to glass fibers, said adhesive composition containing heat curable resin, elastomer latex solids and volatile liquid components, and passing the adhesive-coated glass fibers through an electrical field induced by high frequency electrical heating means, said electrical field extending predominately parallel to the path of travel of said adhesive-coated glass fibers and being sufficient to electrically activate the liquid components of said adhesive composition at a rate sufficient to volatilize and remove substantially all of said liquid components from said adhesive composition without substantially curing said heat curable resin until a glass fiber product is obtained with an elastomeric material on the surface thereof which is substantially uniformly free of said volatilizable liquid components and sufficiently dry and free of tack to permit the immediate processing of the coated glass fibers on handling equipment.
Claim 21
Dependent Claim
18 words
The method of claim 21 wherein said adhesive coated glass fibers are passed vertically through said electrical field.
Claim 22
Dependent Claim
40 words
The method of claim 22 wherein said glass fibers are coated and impregnated with sufficient adhesive composition to produce at least 25 percent by weight of elastomeric material on the surface thereof, based on the weight of the glass fibers.
References Cited (Backward Citations)
FR942914A
Cited
US2865790A
Cited
US3437517A
Cited
US3367793A
Cited
US3424608A
Cited
US3437122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |