Method for incorporating cellulose esters into cellulose by imme

Details Method for incorporating cellulose esters into cellulose by imme Method for incorporating cellulose esters into cellulose by imme

1996-09-23

1998-03-03

Nutter, Nathan M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536 56, 536 63, 536 64, 536 65, 536 69, 536 70, 536 71, C08B 1600, C08B 306, C08B 102

Patent

active

057236003

ABSTRACT:
A method for treating cellulose with cellulose ester for use in various paper products involves reacting cellulose and an acid anhydride to form a cellulose ester-carboxylic acid solution. Acetic anhydride may be used as the acid anhydride, and a cellulose acetate-acetic acid solution may formed as the resulting cellulose ester-acetic acid solution. The cellulose acetate-acetic acid solution is diluted in a mixer, with additional acetic acid. Bulk cellulose is milled into cellulose fibers, and the diluted cellulose acetate-acetic acid solution diluted is combined with the cellulose fibers to achieve a treated fiber. Excess cellulose acetate-acetic acid solution is removed from the treated fiber and recycled to the mixer used in dilution. The treated fiber is water washed followed by removing water from the washed treated fiber. This product can then be used in paper making to produce a sheet for circuit boards, laminated products, and various paper products.

REFERENCES:
patent: 2976205 (1961-03-01), Snead et al.
patent: 2992156 (1961-07-01), Schulwitz
patent: 3057755 (1962-10-01), Malm et al.
patent: 3103462 (1963-09-01), Griggs et al.
Kirk-Othmer, Concise Encyclopedia of Chemical Technology, (1985), p. 327.

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