Biodegradable multi-component polymeric materials based on unmod

Details Biodegradable multi-component polymeric materials based on unmod Biodegradable multi-component polymeric materials based on unmod

1994-03-10

1996-03-19

Michl, Paul R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523124, 523128, 523509, 523511, 525412, 525415, 524 35, C08L 304, C08L 6704

Patent

active

055004652

ABSTRACT:
Compatibilized blends of a biodegradable hydrophobic polyester, unmodified starch or other similar polysaccharide containing less than 1% water by weight, other biodegradable polymers that may be hydrophobic, plasticizer, and other additives. The blends are produced in the absence of water. The preferred polyester polymer is poly(.epsilon.-caprolactone) and the preferred starch is from corn. A small amount of a unique stretching agent is incorporated to provide high elongations at break, especially in film forming compositions containing a significant amount of starch. The starch is a discontinuous phase that may be completely or partially plasticized and the polyester polymer is the continuous phase. The preferred polymers have unique film forming properties and are resistant to water and moisture.

REFERENCES:
patent: 3312641 (1967-04-01), Young
patent: 3949145 (1976-04-01), Otey et al.
patent: 4133784 (1979-01-01), Otey et al.
patent: 4337181 (1982-06-01), Otey et al.
Grant & Hackh's Chemical Dictionary, McGraw-Hill, 1987, p. 550.
Shogren, R. L., Fanta, G. F. and Doane, W. M. Development of Starch Based Plastics--a Reexamination of Selected Polymer Systems in Historical Perspective 45, 276-280 (1993).

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