Compositions: coating or plastic – Coating or plastic compositions – Carbohydrate or derivative containing
Patent
1977-07-14
1978-12-12
Woo, Jay H.
Compositions: coating or plastic
Coating or plastic compositions
Carbohydrate or derivative containing
106163R, C08L 124
Patent
active
041294513
ABSTRACT:
Spinnable, shapable solutions of celluose are disclosed, wherein the solutions contain native cellulose in a mixture of dimethylsulphoxide (DMSO) and formaldehyde. The cellulose has a degree of polymerization (DP) of at least 400 and a concentration in the mixture of at least 6% by weight, based on the volume of DSMO. The formaldehyde/cellulose weight ratio is 0.2 to 2, and the solutions have a water content no greater than 5,000 ppm by weight.
The solutions are obtained by dissolving the cellulose in a mixture of DMSO and formaldehyde, at a formaldehyde/cellulose weight ratio of at least 1, and thereafter the formaldehyde/cellulose weight ratio is reduced, if necessary, to the final level of about 0.2 to 2.
The solutions can be converted into films, membranes, sponges, varnishes, paints, and especially into filaments, with the filaments being generally similar in properties to regenerated cellulose filaments.
REFERENCES:
patent: 3236669 (1966-02-01), Williams
patent: 3706526 (1972-12-01), Swidler et al.
patent: 4022631 (1977-05-01), Turbak et al.
patent: 4028132 (1977-06-01), Liff et al.
patent: 4044090 (1977-08-01), Portnoy
Menault Jacques
Rodier Henry
Rhone Poulenc Textile
Woo Jay H.
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