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US 2026/0184872 A1Published application
Foamable cellulose acetate compositions comprising carbon dioxide and a chemical blowing agent and foams formed therefrom
AssigneeEastman Chemical Company
InventorsGAURAV AMARPURI, MICHAEL EUGENE DONELSON, WAYNE KEN SHIH
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Abstract
The present application discloses foamable compositions comprising cellulose acetate and a combination of a carbon dioxide as a physical blowing agent and a chemical blowing agent. The foamable compositions are used to prepare foams that exhibit lower density, lower average foam cell size, and fewer corrugations than foams made only by carbon dioxide.
Claims20
A foamable composition comprising:
- (i) a cellulose acetate;
- (ii) a nucleating agent;
- (iii) a plasticizer;
- (iv) physical blowing agent, which is carbon dioxide;
- and
- (v) a chemical blowing agent,
- wherein:
- the plasticizer is present at from 5 to 40 wt %,
- the nucleating agent is present at from 0.1 to 3 wt %,
- the physical blowing agent is present at from 0.1 to 5 wt %, and
- the chemical blowing agent is present at from 0.1 to 5 wt %,
- each based on the total weight of the composition.
9 more elements
A foamable composition comprising:
- (i) a cellulose acetate;
- (ii) a plasticizer;
- (iii) physical blowing agent, which is carbon dioxide;
- and
- (iv) a chemical blowing agent,
- wherein:
- the plasticizer is present at from 5 to 40 wt %,
- the physical blowing agent is present at less than 1.75 wt %, and
- the chemical blowing agent is present at from 0.1 to 5 wt %,
- each based on the total weight of the composition,
- wherein the foamable composition is free of any physical nucleating agent as an additive.
8 more elements
Dependencies are inferred from the claim text.