Compositions: coating or plastic – Coating or plastic compositions – Carbohydrate or derivative containing
Patent
1984-11-28
1987-01-06
Morris, Theodore
Compositions: coating or plastic
Coating or plastic compositions
Carbohydrate or derivative containing
106165, 106203, 536 56, C08L 100
Patent
active
046344705
ABSTRACT:
Described is a cellulose dope which is an aqueous alkali solution containing substantially at least 3% by weight of cellulose having a degree of polymerization of at least 100, wherein in the .sup.13 C-NMR spectrum of the cellulose, the C.sub.4 -position carbon peak is found at a magnetic field higher by at least 7 ppm than the magnetic field of the C.sub.4 -position carbon peak of solid cellulose attributed to the strong intramolecular hydrogen bond. This dope is prepared by maintaining a mixture comprising 100 weight parts of cellulose, which may have any crystal form, and 10 to 1000 weight parts of a hydrogen bond-cleaving solution at 100.degree. C. to 350.degree. C. under a pressure of 10 to 250 atmospheres, promptly exposing the mixture to the ambient atmosphere, mixing the resulting cellulose with an aqueous alkali solution maintained at a temperature not higher than 50.degree. C., and then stirring the mixture at a temperature not higher than 10.degree. C. to dissolve the cellulose in the aqueous alkali solution. The dope may be used for the manufacture of a shaped article or for coating.
REFERENCES:
patent: 2978446 (1961-04-01), Battista
patent: 3388119 (1968-06-01), Cruz
patent: 3758458 (1973-09-01), Dyer
Kamide Kenji
Okajima Kunihiko
Asahi Kasei Kogyo Kabushiki Kaisha
Morris Theodore
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