Moisture-shrinkable films from starch graft copolymers

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carbohydrate or derivative as a reactant

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527314, 523128, 260DIG43, C08L 114, C08L 316

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active

048394505

ABSTRACT:
Moisture-shrinkable films can be extrusion blown from modified starch-poly(methyl acrylate) graft compolymers. The films shrink when exposed at room temperature to relative humidities approaching 100%. The films have potential application in shrink-wrapping irregularly shaped articles without application of heat; they are easily removed by water washing.

REFERENCES:
patent: 4026849 (1977-05-01), Bagley et al.
patent: 4156664 (1979-05-01), Skinner et al.
patent: 4280937 (1981-07-01), Bart et al.
patent: 4282121 (1981-08-01), Goodrich
patent: 4337181 (1982-06-01), Otey et al.
patent: 4722815 (1988-02-01), Shibanai
Brandrup et al., (Editors), Polymer Handbook, 2nd Edition, pp. III-143, III-144, III-151, John Wiley & Sons, 1975.
R. J. Dennenberg et al., "A New Biodegradable Plastic Made from Starch Graft Poly(methyl Acrylate) Copolymer," J. Appl. Polym. Sci., 22:459-465, (1978).

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