Stock material or miscellaneous articles – Composite – Of natural gum – rosin – natural oil or lac
Reexamination Certificate
2011-08-30
2011-08-30
Wu, David (Department: 1762)
Stock material or miscellaneous articles
Composite
Of natural gum, rosin, natural oil or lac
C524S313000, C524S314000
Reexamination Certificate
active
08007918
ABSTRACT:
In one aspect, the invention relates to a composition comprising a cellulose ester and a high boiling plasticizer having a boiling point greater than 370° C., wherein the composition has a glass transition temperature (Tg) greater than a similar composition having triphenyl phosphate (TPP) plasticizer substituted for the high boiling plasticizer. The invention also related to articles and films made therefrom. This invention also relates to methods of making the compositions, articles and films.
REFERENCES:
patent: 3642346 (1972-02-01), Dittmar
patent: 2001122980 (2001-05-01), None
patent: 2001163995 (2001-06-01), None
ASTM International, Standard Test Method for Viscosity of Cellulose Derivatives by Ball-Drop Method, Designation D1343-95, (Reapproved 2006), pp. 224-227.
Research Disclosure 15821, Cellulosic compositions that will not stick to processing equipment at high temperatures (anonymous).
Seymour and Minter, Analysis of Plasticizer Activity in Cellulose Ēster, Polymer Engineering and Science, Dec. 1980, vol. 20, No. 18, pp. 1188-1191.
Eastman Chemical Company
Graves, Jr. Bernard J.
Moreno Louis N
Wright Sonya
Wu David
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