Patent US3928503A successfully refreshed from Google Patents.
US3928503A
Expired / Lapsed
US
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Method for working up chloropolyolefin solutions
Assignee: Hoechst AG
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Filing: 1971-07-15
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Granted: 1975-12-23
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Expires: 1991-07-15
Abstract
Abstract When chlorinated polyolefins are to be used in the form of compounds the solutions of the said chloropolyolefins in an organic solvent are suitably worked up by pouring them into a pulverulent compounding component contained in a drying mixer and simultaneously removing the solvent in vapor form.
Inventors
- 👤 Erich Hambsch
- 👤 Helmut Klug
- 👤 Herbert Ortner
- 👤 Walter Semmlinger
- 👤 Rudolf Wirtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:28
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/06; C08F6/12; C08F8/00; C08F8/18; C08F8/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
104 words
A METHOD FOR ISOLATING CHLOROPOLUOLEFINS IN A SOLID, PARTICULATE FORM FROM SOLUTIONS OF CHLOROPOLYOLEFINS OBTAINED BY CHLORINATING POLYOLEFINS IN ORGANIC SOLVENT WHICH COMPRISES ADDING SAID SOLUTION TO PULVERULENT TO A FINELY GRANULAR COMPONENT SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ACETATE, CHLORINATED POLYOLEFINS, POLYVINYL CHLORIDE, POLYVINYLIDENE CHLORIDE, FLUORINE-CONTAINING POLYMERS, CHLORINATED POLYVINYL CHLORIDE AND MIXTURES THEREOF WHILE SAID COMPONENT IS BEING AGITATED AND AS THE SOLUTION IS ADDED SIMULTANEOUSLY REMOVING THE SOLVENT FROM THE RESULTING MISTURE SO THAT SAID MIXTURE REMAINS IN ESSENTIALLY A DRY STATE, SAID COMPONENT BEING PRESENT IN AN AMOUNT SUCH THAT THE ISOLATED CHLOROPOLYOLEFIN CONTAINS AT LEAST 5% BY WEIGHT THEREOF.
Claim 2
Independent Claim
104 words
A METHOD FOR ISOLATING CHLOROPOLUOLEFINS IN A SOLID, PARTICULATE FORM FROM SOLUTIONS OF CHLOROPOLYOLEFINS OBTAINED BY CHLORINATING POLYOLEFINS IN ORGANIC SOLVENT WHICH COMPRISES ADDING SAID SOLUTION TO PULVERULENT TO A FINELY GRANULAR COMPONENT SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ACETATE, CHLORINATED POLYOLEFINS, POLYVINYL CHLORIDE, POLYVINYLIDENE CHLORIDE, FLUORINE-CONTAINING POLYMERS, CHLORINATED POLYVINYL CHLORIDE AND MIXTURES THEREOF WHILE SAID COMPONENT IS BEING AGITATED AND AS THE SOLUTION IS ADDED SIMULTANEOUSLY REMOVING THE SOLVENT FROM THE RESULTING MISTURE SO THAT SAID MIXTURE REMAINS IN ESSENTIALLY A DRY STATE, SAID COMPONENT BEING PRESENT IN AN AMOUNT SUCH THAT THE ISOLATED CHLOROPOLYOLEFIN CONTAINS AT LEAST 5% BY WEIGHT THEREOF.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein the solution of chloropolyolefin employs carbon tetrachloride as the solvent.
Claim 4
Dependent Claim
14 words
The method of claim 2 wherein the solution is of chloropolyethylene in carbon tetrachloride.
Claim 5
Dependent Claim
11 words
The method of claim 1 wherein the component is polyvinyl chloride.
Claim 6
Dependent Claim
36 words
A process according to claim 1 wherein the mixture is subjected to a temperature of from about 40* to 65*C. under a pressure of 10 to 100 mm of mercury in order to remove the solvent.
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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |