|Publication number||UST887005 I4|
|Publication date||Jun 1, 1971|
|Filing date||Apr 2, 1970|
|Priority date||Apr 2, 1970|
|Publication number||US T887005 I4, US T887005I4, US-I4-T887005, UST887005 I4, UST887005I4|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (5), Classifications (5)|
|External Links: USPTO, USPTO Assignment, Espacenet|
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.
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US5393871 *||Jan 4, 1993||Feb 28, 1995||Eastman Chemical Company||Production of polyesters and polyester articles having good clarity|
|EP0085643A2 *||Jan 18, 1983||Aug 10, 1983||THE GOODYEAR TIRE & RUBBER COMPANY||Process for the production of high molecular weight polyester|
|EP0085643A3 *||Jan 18, 1983||Aug 17, 1983||The Goodyear Tire & Rubber Company||Process for the production of high molecular weight polyester|
|WO1994015990A1 *||Jan 3, 1994||Jul 21, 1994||Eastman Chemical Company||Production of branched polyesters|
|WO1994015991A1 *||Jan 3, 1994||Jul 21, 1994||Eastman Chemical Company||Production of polyesters and polyester articles having good clarity|
|International Classification||C08G63/00, C08G63/80|