Low hydroxyl content cellulose ester and polymeric aliphatic polyester compositions and articles
AssigneeEastman Chemical Company
InventorsJohn Patrick Quigley, Marcus David Shelby, Wenlai Feng, Thomas Joseph Pecorini
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Abstract
A cellulose ester composition is provided comprising at least one low hydroxyl content cellulose ester and at least one polymeric aliphatic polyester (PAP), and optionally at least one impact modifier and/or at least one monomeric plasticizer. Processes for producing the cellulose ester compositions as well as articles made using these compositions are also provided.
Claims21
A cellulose ester composition comprising at least one low hydroxyl content (LHC) cellulose ester, at least one polymeric aliphatic polyester (PAP), and optionally at least one impact modifier and/or at least one monomeric plasticizer,
- wherein said at least one LHC cellulose ester has a hydroxyl degree of substitution (DSOH) of 0.15 or less and is chosen from cellulose acetate propionate (CAP) or cellulose acetate butyrate (CAB);
- wherein the PAP is an aliphatic polyester that comprises resides of a C2 to C4 alkane diol and residues of C4 to C8 alkyl dicarboxylic acid, or residues of a ring-opened lactone;
- wherein said cellulose ester composition has a Tg of at least 100° C. and a notched Izod impact strength of at least 80 J/m, measured according to ASTM Method D256 at 23° C. using a 3.2 mm bar, after conditioning the bar at 23° C. and 50% RH for 48 hours.
(canceled)
Dependencies are inferred from the claim text.