US3849148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating glass fibers to improve adhesion to polyolefins
Assignee: PPG Industries Inc
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Filing: 1972-04-14
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Granted: 1974-11-19
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Expires: 1992-04-14
Abstract
Abstract An improved method of preparing glass fiber reinforced polyolefins which comprises contacting the glass fibers during forming with an aqueous size containing a coupling agent, a heat stable organic peroxide, a nonionic surfactant and a lubricant, then contacting the sized glass fibers with polyolefin material and heating until good bonding between the glass fibers and the polyolefin occurs.
Inventors
- 👤 C Temple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:12
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/02; D02G3/16; D02G3/18; C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/25; C03C25/26; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08K9/00; C08K9/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
76 words
AN AQUEOUS SIZE SUITABLE FOR APPLICATION ON GLASS FIBERS CONSISTING OF AN AQUEOUS EMULSION CONSISTING OF 0.5 TO 10 PERCENT BY WEIGHT OF AN ORGANIC-SILANE COUPLING AGENT, 0.1 TO 6.0 PERCENT BY WEIGHT OF A NONIONIC SURFACTANT, 0.001 TO 1 PERCENT BY WEIGHT OF A GLASS FIBER LUBRICANT AND 0.1 TO 6 PERCENT BY WEIGHT OF AN ORGANIC PEROXIDE, FREE RADICAL INITIATOR HAVING A HALF LIFE EXCEEDING 60 HOURS AT 212*F. AND 20 MINUTES AT 300*F.
Claim 2
Dependent Claim
76 words
AN AQUEOUS SIZE SUITABLE FOR APPLICATION ON GLASS FIBERS CONSISTING OF AN AQUEOUS EMULSION CONSISTING OF 0.5 TO 10 PERCENT BY WEIGHT OF AN ORGANIC-SILANE COUPLING AGENT, 0.1 TO 6.0 PERCENT BY WEIGHT OF A NONIONIC SURFACTANT, 0.001 TO 1 PERCENT BY WEIGHT OF A GLASS FIBER LUBRICANT AND 0.1 TO 6 PERCENT BY WEIGHT OF AN ORGANIC PEROXIDE, FREE RADICAL INITIATOR HAVING A HALF LIFE EXCEEDING 60 HOURS AT 212*F. AND 20 MINUTES AT 300*F.
Claim 3
Dependent Claim
110 words
An aqueous size suitable for application on fiber glass consisting of an aqueous emulsion consisting of 0.5 to 10 percent by weight of an organic-silane coupling agent, 0.1 to 6.0 percent by weight of a nonionic surfactant, 0.001 to 1.0 percent by weight of a glass fiber lubricant, 0.1 to 6 percent by weight of an organic peroxide, free radical initiator having a half life exceeding 60 hours at 212*F. and 20 minutes at 300*F., acetic acid in an amount sufficient to adjust the pH of said emulsion to about 4 and maleic acid in an amount sufficient to improve the surface quality of polyolefin reinforced bY said aqueous size.
Claim 4
Dependent Claim
110 words
An aqueous size suitable for application on fiber glass consisting of an aqueous emulsion consisting of 0.5 to 10 percent by weight of an organic-silane coupling agent, 0.1 to 6.0 percent by weight of a nonionic surfactant, 0.001 to 1.0 percent by weight of a glass fiber lubricant, 0.1 to 6 percent by weight of an organic peroxide, free radical initiator having a half life exceeding 60 hours at 212*F. and 20 minutes at 300*F., acetic acid in an amount sufficient to adjust the pH of said emulsion to about 4 and maleic acid in an amount sufficient to improve the surface quality of polyolefin reinforced bY said aqueous size.
Claim 5
Independent Claim
200 words
A method of preparing an aqueous emulsion of a size suitable for application on glass fibers consisting of mixing a heat stable, organic peroxide, free radical initiator having a half life exceeding 60 hours at 212*F. and 20 minutes at 300*F., with a nonionic surfactant at a temperature above the melting point of the said peroxide to form a mixture thereof, adding water to the mixture so formed at a temperature of about 120*F. to about 210*F. to maintain the temperature of the mixture above the melting point of the said peroxide, said mixing continuing until an emulsion is formed, mixing water, an organic-silane coupling agent and a glass fiber lubricant to form a second mixture, combining the emulsion formed and the said second mixture to form a final aqueous size emulsion, controlling the quantity of said peroxide, nonionic surfactant and an organic-silane coupling agent during the mixing operation to maintain in the final aqueous emulsion between 0.5 to 10 percent by weight of the organic-silane coupling agent, 0.1 to 6.0 percent by weight of the nonionic surfactant, 0.001 to 1 percent by weight of the glass fiber lubricant and 0.1 to 6 percent by weight of the said peroxide.
Claim 6
Independent Claim
200 words
A method of preparing an aqueous emulsion of a size suitable for application on glass fibers consisting of mixing a heat stable, organic peroxide, free radical initiator having a half life exceeding 60 hours at 212*F. and 20 minutes at 300*F., with a nonionic surfactant at a temperature above the melting point of the said peroxide to form a mixture thereof, adding water to the mixture so formed at a temperature of about 120*F. to about 210*F. to maintain the temperature of the mixture above the melting point of the said peroxide, said mixing continuing until an emulsion is formed, mixing water, an organic-silane coupling agent and a glass fiber lubricant to form a second mixture, combining the emulsion formed and the said second mixture to form a final aqueous size emulsion, controlling the quantity of said peroxide, nonionic surfactant and an organic-silane coupling agent during the mixing operation to maintain in the final aqueous emulsion between 0.5 to 10 percent by weight of the organic-silane coupling agent, 0.1 to 6.0 percent by weight of the nonionic surfactant, 0.001 to 1 percent by weight of the glass fiber lubricant and 0.1 to 6 percent by weight of the said peroxide.
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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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |