Transparent cellulosic paper and method for making the same

Details Transparent cellulosic paper and method for making the same Transparent cellulosic paper and method for making the same

1976-10-04

1979-01-30

Smith, Ronald H.

Bleaching and dyeing; fluid treatment and chemical modification

Chemical modification of textiles or fibers or products thereof

Cellulose fibers

8119, 8DIG11, 427161, 427391, 427395, 428423, 428425, 428537, 428918, B32B 2906, B05D 500

Patent

active

041370465

ABSTRACT:
A transparent cellulosic paper is produced by coating or impregnating a cellulosic paper with an organic solvent solution containing a compound having a weight-average molecular weight of 200 to 2,000 and having at least two isocyanate groups in a molecule or with an organic solvent solution containing, in addition to said compound, at least one compound selected from the group consisting of an aliphatic monohydric alcohol having 6 to 18 carbon atoms and a nonionic surface active agent to the polyethylene glycol type having one hydroxyl group in a molecule, the ratio OH/NCO in the solution being less than 1; removing said organic solvent; and allowing the coated or impregnated paper to harden by aging.

REFERENCES:
patent: 2018638 (1935-10-01), Driesen
patent: 3112984 (1963-12-01), Aldridge
patent: 3425973 (1969-02-01), Shaw, Jr.
Simonds et al., Handbook of Plastics, New York, D. Van Nostrand Co., Inc., 1943, p. 48.
David & Staley, Analytical Chemistry of the Polyurethanes, New York, Wiley-Interscience, 1969, pp. 398-399.

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