US4448917A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Size for glass fibers
Assignee: Owens Corning Fiberglas Technology Inc
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Filing: 1983-01-06
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Granted: 1984-05-15
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Expires: 2003-01-06
Abstract
Abstract A size for glass fibers is disclosed, the size comprising an oxidized polyolefin, a polymeric film former and an organic acid, preferably terephthalic acid or isophthalic acid.
Inventors
- 👤 Denny E. Black
- 👤 David W. Garrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:16
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; C03C25/28; C03C25/30; C08; C08K; C08K5/00; C08K5/04; C08K5/09
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
91 words
A glass comprising an polyolefin latex, an amino silane, a polymeric film former and an organic acid selected from the group consisting of substituted benzoic acids, benzenedicarboxylic acids, benzenetricarboxylic acids, benzenetetracarboxylic acids, benzenepentacarboxylic acids, benzenehexacarboxylic acids, cyclohexanedicarboxylic acids, fatty acids, aliphatic diacids, aliphatic polyacids, cinnamic acids, benzenediacrylic acids, benzenediacetic acids, naphthoic acids, naphthalenedicarboxylic acids, naphthalenedisulfonic acids and anhydrides of the aforesaid acids said acid or acids being added in an amount sufficient to improve the impact strength of injected molded polypropylene into which glass fibers, coated with said size, are incorporated.
Claim 2
Dependent Claim
91 words
A glass comprising an polyolefin latex, an amino silane, a polymeric film former and an organic acid selected from the group consisting of substituted benzoic acids, benzenedicarboxylic acids, benzenetricarboxylic acids, benzenetetracarboxylic acids, benzenepentacarboxylic acids, benzenehexacarboxylic acids, cyclohexanedicarboxylic acids, fatty acids, aliphatic diacids, aliphatic polyacids, cinnamic acids, benzenediacrylic acids, benzenediacetic acids, naphthoic acids, naphthalenedicarboxylic acids, naphthalenedisulfonic acids and anhydrides of the aforesaid acids said acid or acids being added in an amount sufficient to improve the impact strength of injected molded polypropylene into which glass fibers, coated with said size, are incorporated.
Claim 3
Dependent Claim
17 words
The glass size of claim 1 in which said organic acid is terephthalic acid or isophthalic acid.
Claim 4
Dependent Claim
28 words
The glass size of claim 2 in which said organic acid is present in an amount within the range of from about 0.5 to about 4 weight percent.
Claim 5
Dependent Claim
21 words
The glass size of claim 3 in which said organic acid is present in an amount of about 2.2 weight percent.
References Cited (Backward Citations)
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 |