Biodegradable composition, a process for preparing the same and

Details Biodegradable composition, a process for preparing the same and Biodegradable composition, a process for preparing the same and

1995-05-25

1997-08-05

Nutter, Nathan M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524 49, 524 50, 524 51, 524 52, C08L 8906, C08L10100, C09H 902, B29C 4500

Patent

active

056543530

ABSTRACT:
The present invention relates to a degradable starch resin composition, a process for preparing the same and the use thereof. Said composition comprises starch, synthetic resin, mixing promoter, plasticizer, degradation accelerator and other additives. Said process comprising: (a) selecting a biodegradation accelerator; (b) preparing modified starch concentrate; (c) extruding the modified starch, EAA and the synthetic resin in a double-screw extruder and pelleting to obtain the degradable starch resin. The composition of the present invention contains a biodegradation accelerator and its starch content can be up to 80%. Having excellent biodegradability and good physico-mechanical property, the composition is particularly suitable to be used to prepare various light or heavy packaging films and agricultural films, etc.

REFERENCES:
patent: 4133784 (1979-01-01), Otey et al.
patent: 4293539 (1981-10-01), Ludwig et al.
patent: 5384170 (1995-01-01), Bastioli et al.

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