Patent · US Expired

Open-cell foam and method of making

US6093752A · kind A · utility

34Cited by

13References

10Claims

0Family size

Assignee

THE DOW CHEMICAL COMPANY · US

Inventors

Chung P. Park · Baden-Baden, DE
Bharat I. Chaudhary · Pearland, US
Daniel D. Imeokparia · Midland, US

Key dates

Filing date	Mar 15, 1999
Grant date	Jul 25, 2000
Priority date	—
Expiry date	Mar 15, 2019

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L25/04
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

An open-cell polystyrene foam is provided which is formed from a blend of polystyrene and an ethylene-styrene interpolymer. The ethylene-styrene interpolymer functions as a cell opening agent, and is used to control the open cell content of the resulting foam, which may contain greater than 80 percent open cells. The foam is produced by an extrusion process in which carbon dioxide is used as the preferred blowing agent. The resulting foams may be formed into beads, plank, round, sheets, etc.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.