Cellulose material treated with a thermosetting resin and having

Details Cellulose material treated with a thermosetting resin and having Cellulose material treated with a thermosetting resin and having

1973-06-25

1976-01-06

Sebastian, Leland A.

Compositions

Electrolytes for electrical devices

252 632, 8196, 8120, 8194, H01B 318, H01B 300, D06M 1334, D06M 1300

Patent

active

039310272

ABSTRACT:
Cellulose material having improved resistance to thermal deterioration and having particular application as insulation material for electrical apparatus. The cellulose material is treated with an aqueous dispersion of a liquid, uncured, crosslinkable thermosetting resin, such as an epoxy resin, and a water soluble, nitrogen-containing compound. During curing of the resin, the cellulose molecules are believed to enter into the crosslinking reaction to provide a treated cellulosic product capable of withstanding the deteriorating action of heat over extended periods of time. A protein material, such as casein or isolated soy protein, can be added to the treating liquid and the protein not only contributes additional nitrogen groups to the treating media to further increase the thermal stability of the cellulose, but also acts as a film former. The thermal stability of the cellulose material can be further improved by the addition of an organic amine, such as melamine, to the treating liquid.

REFERENCES:
patent: 2722561 (1955-11-01), McCulloch
patent: 2912382 (1959-11-01), Liao
patent: 3102159 (1963-08-01), Ford
patent: 3211516 (1965-10-01), Sadler
patent: 3429819 (1969-02-01), Tierney
Encyclopedia of Polymer Science and Technology Vol. 6, p. 235.
Encyclopedia of Chemical Technology Kirk-Othmer, 2nd Ed., Vol. 6, p. 569.
Encyclopedia of Chemical Technology Kirk-Othmer, 1st Ed., Vol. 4, pp. 673-675.

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