Shaped articles of polypyrrolidone and method of preparation the

Details Shaped articles of polypyrrolidone and method of preparation the Shaped articles of polypyrrolidone and method of preparation the

1978-06-06

1981-04-21

Lowe, James B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

264136, 2642893, 264291, 264343, B29C 2500, B29C 1702, C08G 6924, D06B 304

Patent

active

042631874

ABSTRACT:
A method of preparing shaped polypyrrolidone articles having a high degree of tensile strength comprising forming said articles from solutions of polypyrrolidone in hydrous formic acid and drawing said articles while impregnated with said hydrous formic acid. The invention also includes the step of enhancing the tenacity of shaped polypyrrolidone articles by impregnation thereof with hydrous formic acid and drawing said impregnated articles.

REFERENCES:
patent: 2768057 (1956-10-01), Freiderich
patent: 2904840 (1959-09-01), Hochreuter
patent: 2980641 (1961-04-01), Cox, Jr.
patent: 3017393 (1962-01-01), Ney, Jr.
patent: 3060141 (1962-10-01), Black
patent: 3060153 (1962-10-01), Follett
patent: 3072615 (1963-01-01), Riedesel
patent: 3324061 (1967-06-01), Tanquary
patent: 3484186 (1969-12-01), Ogawa et al.
patent: 3686066 (1972-08-01), Peters

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