Patent US4248935A successfully refreshed from Google Patents.
US4248935A
Expired / Lapsed
US
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Storage stable polyolefin compatible non-crosslinking size for fiber glass strands
Assignee: PPG Industries Inc
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Filing: 1978-08-21
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Granted: 1981-02-03
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Expires: 1998-08-21
Abstract
Abstract Continuous glass fiber with a polyolefin compatible sizing composed of a coupling agent, a stabilizer, a lubricant, a non-crosslinking film forming polymer, softening agent and surfactant are disclosed for utilization in polyolefin polymer reinforcement. The article formed and formation method for fiber combination with a polyolefin polymer are also disclosed.
Inventors
- 👤 Chester S. Temple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:57
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08J5/08; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; C03C25/28; C08J2323/00; C08J2323/02; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2962; Y10T428/2964; Y10T428/31504; Y10T428/31551; Y10T428/31645; Y10T428/31855
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
41 words
A storage stable glass fiber strand comprising a strand of glass impregnated with a storage stable sizing consisting essentially of a coupling agent, surfactant, softener, cis-butenedioic acid stabilizer, a modified polypropylene lubricant, and a non-crosslinkable vinyl acetate homopolymer film forming polymer.
Claim 2
Dependent Claim
41 words
A storage stable glass fiber strand comprising a strand of glass impregnated with a storage stable sizing consisting essentially of a coupling agent, surfactant, softener, cis-butenedioic acid stabilizer, a modified polypropylene lubricant, and a non-crosslinkable vinyl acetate homopolymer film forming polymer.
Claim 3
Dependent Claim
19 words
The fiber of claim 1 wherein said coupling agent is selected from the group consisting of silanes and siloxanes.
Claim 4
Dependent Claim
12 words
The fiber of claim 1 wherein said coupling agent is an aminosilane.
Claim 5
Dependent Claim
15 words
The fiber of claim 1 wherein said lubricant comprises an emulsion of chemically modified polypropylene.
Claim 6
Dependent Claim
97 words
The fiber of claim 1 wherein said coupling agent comprises between about 2 and about 30 percent by weight of sizing, said stabilizer comprises between about 1 and about 15 percent by weight of said sizing, said lubricant comprises between 10 and about 50 percent by weight of said sizing, said non-crosslinkable polymer comprises between about 20 and about 60 percent by weight of said sizing, said softener comprises between about 0.2 and about 1 percent by weight of said sizing and said surfactant comprises between about 5 and about 0.1 percent by weight of said sizing.
Claim 7
Dependent Claim
96 words
The fiber of claim 1 wherein said coupling agent comprises between about 5 and about 12 percent by weight of sizing, said stabilizer comprises between about 2.5 and about 6 percent by weight of said sizing, said lubricant comprises between 10 and about 50 percent by weight of said sizing, said non-crosslinkable polymer comprises between about 35 and about 40 percent by weight of said sizing, said softener comprises between about 0.2 and about 1 percent by weight of said sizing and said surfactant comprises between 0.1 and about 5 percent by weight of said sizing.
Claim 8
Dependent Claim
18 words
The fiber of claim 1 wherein said softener is selected from the group consisting essentially of polyethylenimine derivatives.
Claim 9
Dependent Claim
23 words
The fiber of claim 1 wherein said surfactant is selected from the group consisting essentially of condensates of propylene oxide and propylene glycol.
Claim 10
Dependent Claim
44 words
An article comprising a polyolefin polymer reinforced with glass strands wherein said glass strands are impregnated with a storage stable sizing consisting essentially of a coupling agent, surfactant, softener, cis-butenedioic acid, stabilizer, modified polypropylene lubricant and a non-crosslinkable vinyl acetate homopolymer film forming polymer.
Claim 11
Dependent Claim
44 words
An article comprising a polyolefin polymer reinforced with glass strands wherein said glass strands are impregnated with a storage stable sizing consisting essentially of a coupling agent, surfactant, softener, cis-butenedioic acid, stabilizer, modified polypropylene lubricant and a non-crosslinkable vinyl acetate homopolymer film forming polymer.
Claim 12
Dependent Claim
22 words
The article of claim 9 wherein said polyolefin is selected from the group consisting of polypropylene, polyethylene higher analogs and mixtures thereof.
Claim 13
Dependent Claim
20 words
The article of claim 9 wherein said coupling agent is selected from the group consisting of a silanes and siloxanes.
Claim 14
Dependent Claim
12 words
The article of claim 9 wherein said coupling agent is an aminosilane.
Claim 15
Dependent Claim
15 words
The article of claim 9 wherein said lubricant comprises an emulsion of chemically modified polypropylene.
Claim 16
Dependent Claim
112 words
The article of claim 9 wherein said coupling agent comprises between about 2 and about 30 percent of said sizing, said stabilizer comprises between about 1 and about 15 percent by weight of said sizing, said lubricant comprises between 10 and about 50 percent by weight said sizing, said non-crosslinkable polymer comprises between about 20 and about 60 percent by weight of said sizing, said softener comprises between about 0.2 and about 1 percent by weight of said sizing, said surfactant comprises between 5 and about 1 percent by weight of said sizing and said polyolefin polymer comprises between about 90 and about 50 percent of the total weight of said article.
Claim 17
Dependent Claim
70 words
The article of claim 9 wherein said coupling agent comprises between about 5 and about 12 percent by weight of said sizing, said stabilizer comprises between about 2.5 and about 5 percent by weight of said sizing, said non-crosslinkable polymer comprises between about 35 and about 40 percent by weight of said sizing and said polyolefin polymer comprises between about 70 and about 55 percent by weight of said article.
Claim 18
Dependent Claim
18 words
The article of claim 9 wherein said softener is selected from the group consisting essentially of polyethylenimine derivatives.
Claim 19
Dependent Claim
23 words
The article of claim 9 wherein said surfactant is selected from the group consisting essentially of condensates of propylene oxide and propylene glycol.
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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) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |