| abstract |
A barrier composition that is injection moldable, can be a transparent film, or can be incorporated into a multilayer film product (by coextrusion and / or lamination) on a dry basis, a) 45- 90% by weight of modified starch selected from starch and / or starch modified by reaction with hydroxylalkyl groups, acetate or dicarboxylic anhydride or graftable polymer; b) polyvinyl alcohol, polyvinyl acetate, and ethylene and vinyl 4-12% by weight of a water-soluble polymer selected from copolymers of alcohol and having a melting point compatible with the starch component in the molten state; c) sorbitol and glycerol, maltitol, xylitol, mannitol, glycerol trioleate, epoxidation A At least one selected from di-oil or soybean oil, tributyl citrate, acetyl triethyl citrate, glyceryl triacetate, 2,2,4-trimethyl-1,3-pentanediol diisobutyrate, polyethylene oxide or polyethylene glycol 5 to 45 wt% amorphous mixture with other plasticizers; d) 0.3 to 2.5 wt% C12-22 fatty acids or salts; e) 0.25 wt% to 3 wt% 2 An emulsifier system having a hydrophilic lipophilic balance value of 10. The barrier film can be co-injected with polyethylene terephthalate (PET) or polylactic acid (PLA) for blow molding into beverage bottles, and polyethylene (PE) for advanced gas barrier containers or closures. Alternatively, it can be co-injected with polypropylene (PP) or a biodegradable polymer, or it can be co-extruded with polyethylene, polypropylene or polylactic acid for thin film packaging applications or blow molded containers. [Selection] Figure 3 |