Patent · US Active

Method for filling hollow cavities with polymer foam

US9056411B2 · kind B2 · utility

2Cited by

8References

15Claims

0Family size

Assignee

DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

Adrian J. Birch · Horgen, CH
Katja Oswald · Zürich, CH

Key dates

Filing date	Jul 24, 2012
Grant date	Jun 16, 2015
Priority date	—
Expiry date	Jul 6, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2375/04
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

Cavities are partially or entirely filled with a polymer foam. A flexible, porous mesh tube is introduced into the cavity. The mesh tube has a volume smaller than that of the cavity and has openings. A foamable liquid mixture is introduced into the mesh tube. Despite the presence of the openings, the foamable liquid mixture does not pass through the openings in the mesh tube. The captured liquid composition then expands. As the composition expands, it flows through the openings in the mesh tube and makes contact with the walls of the cavity. After curing, a polymer foam is obtained which adheres to the cavity walls.

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