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US 11,407,873 B2Granted
Process for foaming polyolefin compositions using a modified high density polyethylene
AssigneeDow Global Technologies LLC
InventorsJiawen Xiong, Gangwei Sun, Mohamed Esseghir, Hongyu Chen, Jeffrey M. Cogen, Yi Zhang
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Abstract
The present disclosure provides a foamable composition containing (A) a high density polyethylene (HDPE); (B) a low density polyethylene (LDPE); (C) a peroxide-modified HDPE; and (D) a nucleator. The present disclosure also provides a process for making a foam composition. Additionally, the present disclosure provides a foam formed from a foamable composition, and a cable with an insulation layer containing the foam.
Claims14
A foamable composition comprising:
- (A) a high density polyethylene (HDPE);
- (B) a low density polyethylene (LDPE);
- (C) a peroxide-modified HDPE having a gel content of 0 wt %;
- (D) a nucleator;
- (E) optionally, an additive;
- and
- (F) optionally, a foaming agent.
4 more elements
A process for making a foam composition, the process comprising the steps of:
- (i) forming a composition comprising:
- (A) a high density polyethylene (HDPE);
- (B) a low density polyethylene (LDPE);
- (C) a peroxide-modified HDPE having a gel content of 0 wt %,
- (D) a nucleator;
- and
- (E) optional additive;
- and
- (ii) contacting the composition with a foaming agent at a pressure from 1 MPa to 40 MPa under extrusion conditions.
6 more elements
Dependencies are inferred from the claim text.