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US 5,334,700 AGranted
Photodegradable and biodegradable polyethylene
AssigneeExxon Chemical Patents Inc.
InventorRichard G. Austin
Life of this patent
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Abstract
Ethylene, 2-methylene-1,3-dioxepane, and optionally carbon monoxide are reacted in the presence of a free radical catalyst to form a biodegradable and optionally photodegradable polymer represented by the formulae: ##STR1## where x and y are integers or ##STR2## where x, y and z are integers.
Claims5
A process for making a biodegradable polymer comprising:
- mixing ethylene with 2-methylene-1,3-dioxepane and carbon monoxide to form a reaction mixture;
- heating the reaction mixture to about 150.degree. to 260.degree. C., at a pressure of about 350 to 3500 kg/cm.sup.2;
- and
- reacting said mixture in the presence of a free radical initiator to form a biodegradable and photodegradable polymer having a molecular weight of greater than 7,000, said polymer having repeating units represented by the formula ##STR7## where x, y and z are integers.
1 more element
Dependencies are inferred from the claim text.