Cellulose ester mineral particle compositions and methods of reducing the molecular weight the cellulose ester in the compositions thereof
AssigneeEastman Chemical Company
InventorsStephanie Kay Clendennen, Hamid Ebrahimi, Yichen Fang, Michael John Rodig
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Abstract
The present application discloses cellulose ester compositions comprising certain mineral particle compositions. The compositions when heated reduce the molecular weight of the cellulose esters in the compositions depending in the temperature, time, and mineral particle composition loading. The present application also discloses processes for reducing the molecular weight of cellulose esters in cellulose ester compositions comprising the mineral particle compositions.
Claims19
A composition, comprising:
- (i) a cellulose ester;
- (ii) a plasticizer;
- and
- (iii) a mineral particle composition,
- wherein when the mineral particle composition is formulated into an aqueous suspension, the aqueous suspension exhibits a pH of less than 6,
- wherein:
- the plasticizer is present at from 0 to 30 wt %,
- the mineral particle composition is present at from 0.1 to 40 wt %,
- each based on the total weight of the cellulose ester composition.
A process for reducing the weight average molecular weight (“Mw”) of a cellulose ester, comprising:
- (1) heating a composition comprising:
- (i) the cellulose ester;
- and
- (ii) a mineral particle composition,
- wherein when the mineral particle composition is formulated into an aqueous suspension, the aqueous suspension exhibits a pH of less than 6,
- at a temperature of at least 200° C.,
- wherein the Mw after heating is reduced by at least 5%.
Dependencies are inferred from the claim text.