Process and apparatus for the manufacture of linear high molecul

Details Process and apparatus for the manufacture of linear high molecul Process and apparatus for the manufacture of linear high molecul

1979-03-27

1980-11-25

Marcus, Michael S.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Organic polymerization

159 13B, 165146, 165147, 261112, 261153, 422200, B01D 122, F28F 1308, C08G 6300

Patent

active

042358442

ABSTRACT:
A process for the manufacture of high molecular weight linear polyesters which are derived from dicarboxylic acids or their ester-forming derivatives and from diols, by condensing polyester precondensates, having a relative viscosity of at least 1.05, at from 270.degree. to 340.degree. C. under reduced pressure, the condensation being started at from 290.degree. to 340.degree. C. and the temperature being lowered as the condensation progresses, the final temperature being at least 10.degree. C. above the melting point of the particular polyester produced, and an apparatus for carrying out the process.

REFERENCES:
patent: 401685 (1889-04-01), Canfield
patent: 1200996 (1916-10-01), Soderlund et al.
patent: 1327599 (1920-01-01), Hunt et al.
patent: 1793174 (1931-02-01), Hofmeister et al.
patent: 1866193 (1932-07-01), Coutant
patent: 2689839 (1954-09-01), Heckert
patent: 2994724 (1961-08-01), Hillard, Jr. et al.
patent: 3551097 (1970-12-01), Brooks et al.

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