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Title: Pressure polymerization of polyester

Abstract

A process is disclosed for the preparation of a polyester polymer or polyester copolymer under superatmospheric pressure conditions in a pipe or tubular reaction under turbannular flow conditions. Reaction material having a glycol equivalents to carboxylic acid equivalents mole ratio of from 1.0:1 to 1.2:1, together with a superatmospheric dense gaseous medium are fed co-currently to the reactor. Dicarboxylic acid and/or diol raw materials may be injected into any of the reaction zones in the process during operation to achieve the overall desired mole ratio balance. The process operates at temperatures of from about 220.degree. C. to about 320.degree. C., with turbannular flow achieved before the polymer product and gas exit the reactor process. The pressure in the reaction zones can be in the range from 15 psia to 2500 psia. A polymer product having a DP of a greater than 40, more preferably at least about 70, is achieved by the transfer of water from the reacting material polymer melt to the gaseous medium in the reactor.

Inventors:
 [1];  [2];  [3];  [4];  [4];  [5];  [6]
  1. Matthews, NC
  2. Charlotte, NC
  3. Greer, SC
  4. Los Alamos, NM
  5. San Antonio, TX
  6. Santa Cruz, NM
Issue Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
OSTI Identifier:
873204
Patent Number(s):
6111064
Application Number:
09/325442
Assignee:
Regents of University of California (Los Alamos, NM)
Patent Classifications (CPCs):
C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08G - MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
pressure; polymerization; polyester; process; disclosed; preparation; polymer; copolymer; superatmospheric; conditions; pipe; tubular; reaction; turbannular; flow; material; glycol; equivalents; carboxylic; acid; mole; ratio; dense; gaseous; medium; fed; co-currently; reactor; dicarboxylic; diol; raw; materials; injected; zones; operation; achieve; overall; desired; balance; operates; temperatures; 220; degree; 320; achieved; product; gas; exit; range; 15; psia; 2500; dp; 40; preferably; 70; transfer; water; reacting; melt; reaction zones; raw materials; dense gas; pressure conditions; reaction zone; atmospheric pressure; gaseous medium; carboxylic acid; superatmospheric pressure; raw material; annular flow; mole ratio; flow conditions; reactor process; process operates; gas exit; dicarboxylic acid; reaction material; /528/526/

Citation Formats

Maurer, Charles J, Shaw, Gordon, Smith, Vicky S, Buelow, Steven J, Tumas, William, Contreras, Veronica, and Martinez, Ronald J. Pressure polymerization of polyester. United States: N. p., 2000. Web.
Maurer, Charles J, Shaw, Gordon, Smith, Vicky S, Buelow, Steven J, Tumas, William, Contreras, Veronica, & Martinez, Ronald J. Pressure polymerization of polyester. United States.
Maurer, Charles J, Shaw, Gordon, Smith, Vicky S, Buelow, Steven J, Tumas, William, Contreras, Veronica, and Martinez, Ronald J. Tue . "Pressure polymerization of polyester". United States. https://www.osti.gov/servlets/purl/873204.
@article{osti_873204,
title = {Pressure polymerization of polyester},
author = {Maurer, Charles J and Shaw, Gordon and Smith, Vicky S and Buelow, Steven J and Tumas, William and Contreras, Veronica and Martinez, Ronald J},
abstractNote = {A process is disclosed for the preparation of a polyester polymer or polyester copolymer under superatmospheric pressure conditions in a pipe or tubular reaction under turbannular flow conditions. Reaction material having a glycol equivalents to carboxylic acid equivalents mole ratio of from 1.0:1 to 1.2:1, together with a superatmospheric dense gaseous medium are fed co-currently to the reactor. Dicarboxylic acid and/or diol raw materials may be injected into any of the reaction zones in the process during operation to achieve the overall desired mole ratio balance. The process operates at temperatures of from about 220.degree. C. to about 320.degree. C., with turbannular flow achieved before the polymer product and gas exit the reactor process. The pressure in the reaction zones can be in the range from 15 psia to 2500 psia. A polymer product having a DP of a greater than 40, more preferably at least about 70, is achieved by the transfer of water from the reacting material polymer melt to the gaseous medium in the reactor.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {8}
}