Patent US3856735A successfully refreshed from Google Patents.
US3856735A
Expired / Lapsed
US
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Incorporation of high molecular weight fluorocarbon polymer in arylene sulfide polymer
Assignee: Phillips Petroleum Co
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Filing: 1972-10-19
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Granted: 1974-12-24
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Expires: 1992-10-19
Abstract
Abstract High molecular weight fluorocarbon polymer is incorporated into arylene sulfide polymer coating dispersions by (a) intensive milling of the fluorocarbon polymer and a liquid capable of wetting same and (b) thereafter adding the arylene sulfide polymer and a pigment of filler and subjecting the mixture to additional intensive milling.
Inventors
- 👤 J Blackwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:40
CPC Classifications
C; C09; C09D; C09D181/00; C09D181/02; C08; C08K; C08K3/00; C08K3/18; C08K5/00; C08K5/04; C08K5/05; C08L; C08L27/00; C08L27/02; C08L27/12; C08L81/00; C08L81/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
170 words
A PROCESS FOR FORMING POLY(ARYLENE SULFIDE) COATING DISPRSION CONSISTING ESSENTIALLY OF THE FOLLOWING STEPS: SUBJECTING FLUOROCARBON POLYMER, IN PARTICULATE FRM HAVING A MOLECULAR WEIGHT SUFFICIENT TO GIVE A MELT VISCOSITY FLOW OF 0 AT 380*C USING A 5,000 G. WEIGHT, TO INTENSIVE MILLING BY BALL MILLING OR ROD MILLING WITH A LIQUID SELECTED FROM WATER, ETHYLENE GLYCOL OR PROPYLENE GLYCOL; AND THEREAFTER ADDING THERETO SAID POLY(ARYLENE SULFIDE) IN PARTICULATE FORM AND A PIGMENT OR FILLER IN PARTICULATE FORM AND SUBJECTING THE ESULTING MIXTURE TO ADDITIONAL INTENSIVE MILLING BY BALL MILLING OR ROD MILLING, THE RATIO OF SSAID FLUOROCARBON POLYMER TO SAID PIGMENT OR FILLER BEING WITHIN THE RANGE OF 0.1 TO 3 PARTS BY WEIGHT OF FLUOROCARBON POLYMER PER 1 PART BY WEIGHT OF SAID PIGMENT OF FILLER, THE RATION OF SAID POLY(ARYLENE SULFIDE) TO SAID FLUOROCARBON POLYMER BEING WITHIN THE RANGE OF 2:1 TO 40:1, AND WHEREIN THE TOTAL SOLIDS CONTENT IS WITHIN THE RANGE OF 15 TO 40 WEIGHT PERCENT BASED ON THE TOTAL WEIGHT OF SAID DISPERSION.
Claim 2
Dependent Claim
170 words
A PROCESS FOR FORMING POLY(ARYLENE SULFIDE) COATING DISPRSION CONSISTING ESSENTIALLY OF THE FOLLOWING STEPS: SUBJECTING FLUOROCARBON POLYMER, IN PARTICULATE FRM HAVING A MOLECULAR WEIGHT SUFFICIENT TO GIVE A MELT VISCOSITY FLOW OF 0 AT 380*C USING A 5,000 G. WEIGHT, TO INTENSIVE MILLING BY BALL MILLING OR ROD MILLING WITH A LIQUID SELECTED FROM WATER, ETHYLENE GLYCOL OR PROPYLENE GLYCOL; AND THEREAFTER ADDING THERETO SAID POLY(ARYLENE SULFIDE) IN PARTICULATE FORM AND A PIGMENT OR FILLER IN PARTICULATE FORM AND SUBJECTING THE ESULTING MIXTURE TO ADDITIONAL INTENSIVE MILLING BY BALL MILLING OR ROD MILLING, THE RATIO OF SSAID FLUOROCARBON POLYMER TO SAID PIGMENT OR FILLER BEING WITHIN THE RANGE OF 0.1 TO 3 PARTS BY WEIGHT OF FLUOROCARBON POLYMER PER 1 PART BY WEIGHT OF SAID PIGMENT OF FILLER, THE RATION OF SAID POLY(ARYLENE SULFIDE) TO SAID FLUOROCARBON POLYMER BEING WITHIN THE RANGE OF 2:1 TO 40:1, AND WHEREIN THE TOTAL SOLIDS CONTENT IS WITHIN THE RANGE OF 15 TO 40 WEIGHT PERCENT BASED ON THE TOTAL WEIGHT OF SAID DISPERSION.
Claim 3
Dependent Claim
11 words
A method according to claim 1 wherein said fluorocarbon is polytetrafluoroethylene.
Claim 4
Dependent Claim
16 words
A method according to claim 2 wherein said liquid is water containing a surface active agent.
Claim 5
Dependent Claim
13 words
A method according to claim 3 wherein said poly(arylene sulfide) is polyphenylene sulfide.
Claim 6
Dependent Claim
23 words
A method according to claim 4 wherein said pigment is selected from the group consisting of titanium dioxide, iron oxide, and mixtures thereof.
Claim 7
Dependent Claim
25 words
A method according to claim 7 wherein said pigment, fluorocarbon polymer, and poly(arylene sulfide) particles each have a particle size of less than 40 mesh.
Claim 8
Dependent Claim
65 words
A method according to claim 4 wherein said intensive milling of said liquid and fluorocarbon polymer is done by ball or rod milling for a time period of greater than 4 hours and said intensive milling of the resulting mixture with said polyphenylene sulfide and said pigment or filler is done in a ball or rod mill for a time of greater than 2 hours.
References Cited (Backward Citations)
US3622376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |