Method for solid phase polymerization

Details Method for solid phase polymerization Method for solid phase polymerization

1996-11-27

1999-09-21

Hampton-Hightower, P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

528310, 528313, 528323, 528336, 528487, 528492, 528501, 528502C, 528503, 525419, 525420, C08G 6946, C08G 6948

Patent

active

059555696

ABSTRACT:
An improved method for increasing the relative viscosity and molecular weight of a polyamide polymer (such as nylon 6,6, nylon 6, and the like) while in the solid state involving the use of a phosphorus-containing catalyst (such as 2(2'-pyridyl) ethyl phosphonic acid or the like) in combination with an oxygen free gas characterized by a low dew point (typically below 30.degree. C. and preferably below -30.degree. C.). The combination of affording commercial operation at greater through put at lower temperature. Such a process is of particular value during the production of terpolyamide and multipolyamide polymer intended for use in colored nylon fiber manufacture.

REFERENCES:
patent: 2172374 (1939-11-01), Flory
patent: 3015651 (1962-01-01), Kjellmark
patent: 3031433 (1962-04-01), Monroe
patent: 3254429 (1966-06-01), Livingston
patent: 3390134 (1968-06-01), Kibler
patent: 3480596 (1969-11-01), Simons
patent: 3562206 (1971-02-01), Silverman et al.
patent: 3634359 (1972-01-01), Breitschaft et al.
patent: 3657388 (1972-04-01), Schweitzer et al.
patent: 3821171 (1974-06-01), Beaton
patent: 4223128 (1980-09-01), Halek et al.
patent: 4254253 (1981-03-01), Brent, Jr. et al.
patent: 4568736 (1986-02-01), Curatolo et al.
patent: 4591468 (1986-05-01), Follows et al.
patent: 4609721 (1986-09-01), Kirshenbaum et al.
patent: 4952345 (1990-08-01), Roa et al.
patent: 5073453 (1991-12-01), Knorr
patent: 5116919 (1992-05-01), Buzinkai et al.
patent: 5140098 (1992-08-01), Pipper et al.
patent: 5234644 (1993-08-01), Schutze et al.
patent: 5237755 (1993-08-01), Lowe
patent: 5292865 (1994-03-01), Kerps et al.
patent: 5434223 (1995-07-01), Scheetz et al.
patent: 5461141 (1995-10-01), Sheetz
patent: 5543495 (1996-08-01), Anolick et al.
Doub et al.,, How to dry resisns for optimum parts and trouble-free processing, Plasti Engineering, Jun. 1983.
Srinivansan et al., Solid-State Polymerization Vis-a-Vis Fiber Formation of Step-Growth Polymers.I. Results from a Study of Nylon 66, Journal of Applied Science, vol. 53, pp. 1731-1743 (1994) The month in the dat of publication is not available.
John Wiley & Sons, Inc., Encyclopedia of Industrial Chemical Analysis, 17, 293-294, 1995 The month in the date of publication is not available.

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