US4178412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass size compositions and glass fibers coated therewith
Assignee: Owens Corning Fiberglas Technology Inc
•
Filing: 1978-04-13
•
Granted: 1979-12-11
•
Expires: 1998-04-13
Abstract
Abstract A size composition for glass fibers, and glass fibers coated therewith, is disclosed. The size comprises an unsaturated, water-emulsifiable polyester resin, an ethylene-vinyl acetate copolymer emulsion and a polyvinyl acetate-organo silane copolymer, the size being suitable for application to fiberglass roving employed to reinforce sheet and bulk molding compounds.
Inventors
- 👤 Donald B. Sage
- 👤 Fred G. Krautz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:27
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2962; Y10T428/2964
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
63 words
A glass fiber having a portion of its surface coated with about 1.2 to 3.0 weight percent of a sizing composition, said sizing composition comprising: (a) an unsaturated water-emulsifiable polyester resin; (b) an emulsion of a copolymer of ethylene and vinyl acetate; and (c) a copolymer of polyvinylacetate and an organo silane having about 1 to 7 weight percent of said organo silane.
Claim 2
Dependent Claim
63 words
A glass fiber having a portion of its surface coated with about 1.2 to 3.0 weight percent of a sizing composition, said sizing composition comprising: (a) an unsaturated water-emulsifiable polyester resin; (b) an emulsion of a copolymer of ethylene and vinyl acetate; and (c) a copolymer of polyvinylacetate and an organo silane having about 1 to 7 weight percent of said organo silane.
Claim 3
Dependent Claim
15 words
The glass fiber of claim 1 in which said polyester resin is orthophthalic polyester resin.
Claim 4
Dependent Claim
32 words
The glass fiber of claim 1 in which said polyester resin is employed in said aqueous composition in an amount within the range of from about 1 to about 13 weight percent.
Claim 5
Dependent Claim
34 words
The glass fiber of claim 1 in which said ethylenevinyl acetate polymer emulsion is employed in said aqueous composition in an amount within the range of from about 1 to about 10 weight percent.
Claim 6
Dependent Claim
34 words
The glass fiber of claim 1 in which said polyvinyl acetate-organo silane copolymer is employed in said aqueous composition in an amount within the range of from about 1 to about 15 weight percent.
Claim 7
Dependent Claim
21 words
The glass fiber of claim 5 in which said polyvinyl acetate-organo silane copolymer comprises a copolymer of vinyl acetate and gamma-methacryloxypropyltrimethoxysilane.
Claim 8
Dependent Claim
20 words
The glass fiber of claim 1 wherein said aqueous composition further comprises a lubricant and an organo silane coupling agent.
Claim 9
Dependent Claim
31 words
The glass fiber of claim 7 wherein said aqueous composition contains about 0.02 to 1.0 weight percent of said lubricant and about 0.01 to 1.0 weight percent of said coupling agent.
References Cited (Backward Citations)
US3252825A
Cited
US3418094A
Cited
US3729438A
Cited
US3674891A
Cited
US3928684A
Cited
US3884886A
Cited
US4097436A
Cited
US4120837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-10 | 1983-06-11 | 1983-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-10 | 1987-06-11 | 1987-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-10 | 1991-06-11 | 1991-12-11 | $7700.00 | Window Closed / Lapsed |