Cellulose ester polymer composition having low coefficient of friction
AssigneeLego A/S
InventorsJohn Thomas HOFMANN, Wenlai FENG, David Chris SPENCER, Katherine Augusta HOFMANN
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Abstract
Provided are cellulose ester compositions comprising at least one cellulose ester, at least one impact modifier in an amount from about 1 to about 15 weight percent, and at least one frictional additive chosen from waxes and siloxanes in an amount from about 0.1 to about 15 weight percent. The composition has an HDT value greater than 850 C at 0.455 MPa, and a notched Izod impact strength value greater than 80 J/m measured according to ASTM D256 on 3.2 mm thick bars at 230 C, after conditioning the bars at 230° C. and 50% RH for 48 hours.
Claims26
A cellulose ester composition comprising:
- (a) at least one cellulose ester;
- (b) at least one impact modifier in an amount from about 1 to about 15 weight percent;
- (c) at least one frictional additive chosen from waxes and siloxanes in an amount from about 0.1 to about 15 weight percent;
- and
- (d) optionally, one or more plasticizers in an amount from 0 to about 15 weight percent;
- wherein the composition has an HDT (heat deflection temperature) value greater than 85° C. at 0.455 MPa, and a notched Izod impact strength value greater than 80 J/m measured according to ASTM D256 on 3.2 mm thick bars at 23° C., after conditioning the bars at 230° C. and 50% RH for 48 hours.
(canceled)
A construction toy or component comprising a polymer composition including:
- (a) a cellulose ester;
- (b) an impact modifier in an amount from 1 to 15 weight percent;
- and
- (c) a frictional additive chosen from waxed and siloxanes in an amount from 0.1 to 15 weight percent;
- wherein the composition has an HDT (heat deflection temperature) value greater than 85° C. at 0.455 MPa, and a notched Izod impact strength value greater than 80 J/m measured according to ASTM D256 on 3.2 mm thick bars at 23° C., after conditioning the bars at 230° C. and 50% RH for 48 hours.
(canceled)
(canceled)
A cellulose ester composition comprising:
- (a) a cellulose ester;
- (b) an impact modifier;
- and
- (c) a frictional additive chosen from waxes and siloxanes in an amount from 0.1 to 15 weight percent.
Dependencies are inferred from the claim text.