Resin composition of hydrophilic pullulan, hydrophobic thermoplastic resin, and plasticizer
AssigneesSumitomo Chemical Company, Limited, Hayashibara Biochemical Laboratories, Incorporated
InventorsHiroomi Matsunaga, Kozo Tsuji, Teruo Saito
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Abstract
A novel resin composition is obtained by blending a hydrophilic pullulan with 2 to 98 wt %, based on the total resin weight, of a hydrophobic thermoplastic resin. In case the amount of the thermoplastic resin is 2 to 50 wt %, there is obtained a resin composition consisting essentially of the pullulan which is excellent in water resistance, while in case the amount of the thermoplastic resin is 50 to 98 wt %, there is obtained a resin composition consisting essentially of the thermoplastic resin which has been improved in water and moisture absorptivity.
Claims4
A resin composition prepared by blending
- a hydrophilic pullulan resin having a molecular weight of 10,000 to 5,000,000 selected from the group consisting of pullulan and a pullulan resin which has been partly modified by etherification, esterification or graftcopolymerization with a vinyl compound,
- a hydrophobic thermoplastic resin selected from the group consisting of polyethylene, polypropylene, polystyrene, acrylonitrile-butadiene-styrene copolymers, polymethylmethacrylate, polyvinyl acetate, polyvinyl chloride, polyvinylidene chloride, vinyl acetate-vinyl chloride copolymer, ethylene-vinyl acetate copolymer, propylene-vinyl acetate copolymer, polycarbonates, polyacetals, polysulfones, polyamides, and polyesters, present in an amount of 2 to 98 wt % based on the total resin and
- a plasticizer selected from the group consisting of water, glycerin, ethylene glycol, propylene glycol, butylene glycol, dimethyl sulfoxide, and dimethyl formamide present in an amount of 1 to 50 wt % based on the total weight of pullulan and plasticizer.
Dependencies are inferred from the claim text.