Patent US4448911A successfully refreshed from Google Patents.
US4448911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous epoxy sizing composition for glass fibers and fibers sized therewith
Assignee: Owens Corning Fiberglas Technology Inc
•
Filing: 1983-04-12
•
Granted: 1984-05-15
•
Expires: 2003-04-12
Abstract
Abstract Aqueous sizing compositions for glass fibers having emulsified epoxy resin as film-former, emulsified mineral oil as lubricant, glycidoxyalkyl and/or haloalkylsilanes as coupling agents, amide anti-static agent and polyvinylpyrrolidone give superior properties, especially where the sized glass fibers are used as reinforcement in epoxy resin articles, when reduced proportions of predominantly anionic surfactants are used to co-emulsify the epoxy resin film-former and the mineral oil.
Inventors
- 👤 Richard M. Haines
- 👤 Robert Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:29
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08J5/08; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; C08L; C08L63/00; C08J2363/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
185 words
A dilute aqueous composition suitable for sizing glass fibers which consists essentially of emulsified liquid epoxy resin or emulsified liquid solution of a major proportion by weight of epoxy resin and a minor proportion by weight of an organic solvent therefor; about 5 to about 15 percent of the weight of the epoxy resin of emulsified mineral oil; about 5 to about 12 percent of the weight of the epoxy resin of predominantly non-ionic surfactant for emulsifying the epoxy resin or solution thereof and the mineral oil; about 21/2 to about 71/2 percent of the weight of the epoxy resin of amide anti-static agent; about 2 to about 15 percent of the weight of the epoxy resin of polyvinylpyrrolidone; about 3 to about 15 percent of the weight of the epoxy resin of an organosilane coupling agent having a halogen atom or an epoxy group linked by hydrolysis-resistant bonds through at least one intervening atom to a silicon atom of said silane and also having at least two groups which are readily hydrolyzable at a silicon atom of said silane, and/or hydrolysate thereof; and water.
Claim 2
Dependent Claim
185 words
A dilute aqueous composition suitable for sizing glass fibers which consists essentially of emulsified liquid epoxy resin or emulsified liquid solution of a major proportion by weight of epoxy resin and a minor proportion by weight of an organic solvent therefor; about 5 to about 15 percent of the weight of the epoxy resin of emulsified mineral oil; about 5 to about 12 percent of the weight of the epoxy resin of predominantly non-ionic surfactant for emulsifying the epoxy resin or solution thereof and the mineral oil; about 21/2 to about 71/2 percent of the weight of the epoxy resin of amide anti-static agent; about 2 to about 15 percent of the weight of the epoxy resin of polyvinylpyrrolidone; about 3 to about 15 percent of the weight of the epoxy resin of an organosilane coupling agent having a halogen atom or an epoxy group linked by hydrolysis-resistant bonds through at least one intervening atom to a silicon atom of said silane and also having at least two groups which are readily hydrolyzable at a silicon atom of said silane, and/or hydrolysate thereof; and water.
Claim 3
Dependent Claim
25 words
An aqueous composition according to claim 1 wherein the epoxy resin is present in an amount from about 1 to about 10 percent by weight.
Claim 4
Dependent Claim
21 words
An aqueous composition according to claim 1 wherein said epoxy resin has at least about 2 epoxy groups per molecule thereof.
Claim 5
Dependent Claim
21 words
An aqueous composition according to claim 3 wherein said epoxy resin comprises a reaction product of a bisphenol and an epihalohydrin.
Claim 6
Dependent Claim
23 words
An aqueous composition according to claim 4 wherein said epoxy resin is characterized by an epoxy equivalent weight not greater than about 250.
Claim 7
Dependent Claim
20 words
An aqueous composition according to claim 5 wherein said organosilane is a haloalkylsilane or a glycidoxyalkylsilane or a mixture thereof.
Claim 8
Dependent Claim
18 words
An aqueous composition according to claim 6 wherein said organosilane is 3-chloropropyltrimethoxysilane or 3-glycidoxypropyltrimethoxysilane or a mixture thereof.
Claim 9
Dependent Claim
20 words
A glass fiber having as a size coating a dried residue of an aqueous sizing composition according to claim 1.
Claim 10
Dependent Claim
17 words
A resinous article reinforced with a glass fiber of claim 8 imbedded in the matrix resin thereof.
Claim 11
Dependent Claim
14 words
An article according to claim 9 wherein the matrix resin is an epoxy resin.
Claim 12
Dependent Claim
23 words
An article according to claim 10 wherein said article is fabricated by filament winding of essentially continuous multi-filament strands of said glass fiber.
References Cited (Backward Citations)
US3223577A
Cited
US3437517A
Cited
US3395069A
Cited
US3441585A
Cited
US3478077A
Cited
US3654332A
Cited
US3772870A
Cited
US3837898A
Cited
US3850869A
Cited
US4140833A
Cited
US4305742A
Cited
US4330444A
Cited
US4361465A
Cited
US4369264A
Cited
US4346026A
Cited
US4394475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |