Back to results
US 2023/0399480 A1Published application
Foams comprising blends of silicone functionalized polyethylene and low density polyethylene
AssigneeDow Global Technologies LLC
InventorsBrian R. Dorvel, Andrew T. Heitsch, Anson Sze Tat Wong, Stéphane Costeux, John O. Osby, Jian Yang
Life of this patent
Estimating the term…
Abstract
According to various embodiments, a microcellular foam is provided, wherein the microcellular foam comprises a polymer blend, the polymer blend comprising: from 70 to 95% by weight low density polyethylene (LDPE); and from 5 to 30% by weight of polydimethylsiloxane grafted LDPE (PDMS-g-LDPE), wherein the microcellular foam has an average cell size of less than 60 μm.
Claims14
A microcellular foam comprising a polymer blend, the polymer blend comprising:
- from 70 to 95% by weight low density polyethylene (LDPE);
- and
- from 5 to 30% by weight of polydimethylsiloxane grafted LDPE (PDMS-g-LDPE),
- wherein the microcellular foam has a cell size of less than 60 μm.
1 more element
A method of producing microcellular foam comprising
- producing a polymer blend by mixing from 70 to 95% by weight low density polyethylene (LDPE), and from 5 to 30% by weight of polydimethylsiloxane grafted LDPE (PDMS-g-LDPE)
- introducing the polymer blend to a batch foamer at a temperature of at least 75° C. and a pressure of at least 1000 psig in the presence of a physical blowing agent;
- and
- depressurizing the soaked polymer blend to produce the microcellular foam having a cell size of less than 60 μm in less than 5 seconds.
1 more element
Dependencies are inferred from the claim text.