Process for controlling the photodegradation of mulch film

Details Process for controlling the photodegradation of mulch film Process for controlling the photodegradation of mulch film

1993-12-13

1994-08-30

Szekely, Peter

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523124, 264211, 524495, 524496, 524 94, 524 96, 524528, 524534, C08K 304, C08K 534.35, C08L 2312

Patent

active

053428625

ABSTRACT:
Process for controlling the photodegradation of a film of polypropylene or propylene copolymers having a thickness of about 1.25 mils or less, by forming a composition comprising carbon black as the sole UV light absorbing staiblizer and comprising about 0.5% to about 2.4% by weight of the film, hindered amine light stabilizer for interrupting the free radical chain degradation mechanism and comprising about 0.02% to about 0.4% by weight of the film; and an impact modifier for enhancing the photodegradability of the film and comprising about 1% to 40% by weight of the film.

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