UST887005I4 - Defensive publication - Google Patents
Defensive publication Download PDFInfo
- Publication number
- UST887005I4 UST887005I4 US887005DH UST887005I4 US T887005 I4 UST887005 I4 US T887005I4 US 887005D H US887005D H US 887005DH US T887005 I4 UST887005 I4 US T887005I4
- Authority
- US
- United States
- Prior art keywords
- prepolymer
- glycol
- fluidized bed
- molecular weight
- defensive publication
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
- C08G63/80—Solid-state polycondensation
Abstract
PROCESS OF MAUNFACTURING A POLYESTER BY INITIALLY FORMING A MOLTEN PREPOLYMER FROM A GLYCOL, SUCH AS ETHYLENE GLYCOL AND A DIFUNCTIONAL COMPOUND SUCH AS TEREPHTHALIC ACID OR A LOWER DIALKYL DIESTER THEREOF, SOLIDIFYING THE RESULTING PREPOLYMER, CRYSTALLIZING THE PREPOLYMER, PULVERIZING THE CRYSTALLIZED PREPOLYMER, POLYMERIZING THE PULVERIZED PREPOLYMER IN A HEATED FLUIDIZED BED IN THE PRESENCE OF A CONTINUOUSLY INTRODUCED STREAM OF PREHEATED INERT GAS, WHEREIN AN IMPROVEMENT RESIDES IN MAINTAINING WITHIN THE FLUIDIZED BED A CONTROLLED CONCENTRATION OF GLYCOL VAPOR, WHEREBY THE MOLECULAR WEIGHT OF THE POLYMER IS CAUSED TO ATTAIN A PREDETERMINED VALUE.
Description
DEFENSIVE PUBLlCATlUN UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 0.G. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.
Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter.
PUBLISHED JUNE 1, 1971 T887,005 CONTROL OF MOLECULAR WEIGHT 0F POLY (ETHYLENE TEREPHTHALATE) DURING SOLID PHASE POLYCONDENSATION Charles J. Kibler, 620 Dogwood Drive 37663; David L. Nealy, 908 Afton St. 37660; and Thomas G. Davis, 1368 Garden Drive, 37664, all of Kingsport, Tenn.
Filed Apr. 2, 1970, Ser. No. 25,270 Int. Cl. C08g 17/03 US. Cl. 260-75 No Drawing. 15 Pages Specification Process of manufacturing a polyester by initially forming a molten prepolymer from a glycol, such as ethylene glycol and a difunctional compound such as terephthalic acid or a lower dialkyl diester thereof, solidifying the resulting prepolymer, crystallizing the prepolymer, pulverizing the crystallized prepolyrner, polymerizing the pulverized prepolyrner in a heated fluidized bed in the presence of a continuously introduced stream of preheated inert gas, wherein an improvement resides in maintaining within the fluidized bed a controlled concentration of glycol vapor, whereby the molecular Weight of the polymer is caused to attain a predetermined value.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US2527070A | 1970-04-02 | 1970-04-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| UST887005I4 true UST887005I4 (en) | 1971-06-01 |
Family
ID=21825049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US887005D Pending UST887005I4 (en) | 1970-04-02 | 1970-04-02 | Defensive publication |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | UST887005I4 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4379912A (en) | 1982-08-12 | 1983-04-12 | Eastman Kodak Company | Method of making polyester prepolymers |
| EP0085643A2 (en) * | 1982-02-02 | 1983-08-10 | The Goodyear Tire & Rubber Company | Process for the production of high molecular weight polyester |
| WO1994015991A1 (en) * | 1993-01-04 | 1994-07-21 | Eastman Chemical Company | Production of polyesters and polyester articles having good clarity |
| WO1994015990A1 (en) * | 1993-01-04 | 1994-07-21 | Eastman Chemical Company | Production of branched polyesters |
-
1970
- 1970-04-02 US US887005D patent/UST887005I4/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0085643A2 (en) * | 1982-02-02 | 1983-08-10 | The Goodyear Tire & Rubber Company | Process for the production of high molecular weight polyester |
| EP0085643A3 (en) * | 1982-02-02 | 1983-08-17 | The Goodyear Tire & Rubber Company | Process for the production of high molecular weight polyester |
| US4379912A (en) | 1982-08-12 | 1983-04-12 | Eastman Kodak Company | Method of making polyester prepolymers |
| WO1994015991A1 (en) * | 1993-01-04 | 1994-07-21 | Eastman Chemical Company | Production of polyesters and polyester articles having good clarity |
| WO1994015990A1 (en) * | 1993-01-04 | 1994-07-21 | Eastman Chemical Company | Production of branched polyesters |
| US5393871A (en) * | 1993-01-04 | 1995-02-28 | Eastman Chemical Company | Production of polyesters and polyester articles having good clarity |
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