Patent US4587286A successfully refreshed from Google Patents.
US4587286A
Expired / Lapsed
US
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Dispersion of poly(ethylene tetrafluoroethylene)
Assignee: Individual
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Filing: 1984-03-12
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Granted: 1986-05-06
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Expires: 2004-03-12
Abstract
Abstract The dispersion of poly(ethylene tetrafluoroethylene) containing various aids such as a viscosity improver, wetting agent, water, solvent, and an anti-sag agent. The dispersion is sprayable and thick coats can be applied to an article or object. Upon cure, the coating exhibits very good physical properties such as toughness, wear and abrasion resistance, and corrosion resistance.
Inventors
- 👤 James Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:19
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/18; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
126 words
A dispersion of poly(ethylene tetrafluoroethylene) comprising: from about 20 to about 75 parts by weight of the poly(ethylene tetrafluoroethylene); from about 7 to about 23 parts by weight of a glycerine; from about 2 to about 17 parts by weight of an alkyl phenol ethylene oxide condensate product having from about 9 to about 15 moles of ethylene oxide condensates; from about 30 to about 80 parts by weight of water; and from about 0.1 to about 3.0 parts by weight of an ethylene glycol monobutyl ether and about 7 to about 30 parts by weight of a hydrocarbon solvent having from 6 to 12 carbon atoms such that a dispersion is formed, and about 0.1 to about 1.0 parts by weight of an anti-sag agent.
Claim 2
Dependent Claim
126 words
A dispersion of poly(ethylene tetrafluoroethylene) comprising: from about 20 to about 75 parts by weight of the poly(ethylene tetrafluoroethylene); from about 7 to about 23 parts by weight of a glycerine; from about 2 to about 17 parts by weight of an alkyl phenol ethylene oxide condensate product having from about 9 to about 15 moles of ethylene oxide condensates; from about 30 to about 80 parts by weight of water; and from about 0.1 to about 3.0 parts by weight of an ethylene glycol monobutyl ether and about 7 to about 30 parts by weight of a hydrocarbon solvent having from 6 to 12 carbon atoms such that a dispersion is formed, and about 0.1 to about 1.0 parts by weight of an anti-sag agent.
Claim 3
Dependent Claim
78 words
A dispersion of poly(ethylene tetrafluoroethylene) according to claim 1, wherein the amount of said solvent ranges from about 15 to about 25 parts by weight, wherein the amount of said poly(ethylene tetrafluoroethylene) ranges from about 30 to about 60 parts by weight, wherein the amount of said ethylene glycol monobutyl ether ranges from about 0.5 to about 1.5 parts by weight, and wherein the amount of said solvent ranges from about 25 to about 25 parts by weight.
Claim 4
Dependent Claim
23 words
A dispersion of poly(ethylene tetrafluoroethylene), according to claim 1, including from about 0.1 to about 1.5 parts by weight of an antiseparation agent.
Claim 5
Dependent Claim
152 words
A dispersion of poly(ethylene tetrafluoroethylene), according to claim 1, wherein said viscosity improver is glycerin is from about 10 to about 14 parts by weight, the amount of said alkyl phenol ethylene oxide condensate product ranges from about 8 to about 12 parts by weight, the amount of said water ranges from about 55 to about 65 parts by weight, the amount of said poly(ethylene tetrafluoroethylene) ranges from about 45 to about 55 parts by weight, wherein the ethylene glycol monobutyl ether is from about 0.8 to about 1.2 parts by weight, wherein said hydrocarbon solvent is toluene and is present in about 18 to about 22 parts by weight and said anti-sag agent is styrene present in from about 0.2 to about 0.7 parts by weight, and wherein said antiseparation agent is di ethylene glycol monobutyl ether and the amount thereof is from about 0.3 to about 1.1 parts by weight.
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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) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |