Patent · US Active

Rigid polyurethane foams with high acoustic absorption

US9777104B2 · kind B2 · utility

3Cited by

4References

7Claims

0Family size

Assignee

Covestro Deutschland AG · DE

Inventors

Lutz Boehnke · Overath, DE
Joern Beaujean · Leverkusen, DE
Rolf Albach · Recklinghausen, DE
Jun Li · Lo Wu, CN
Ling Shi · Shanghai, CN

Key dates

Filing date	Mar 25, 2013
Grant date	Oct 3, 2017
Priority date	—
Expiry date	Jul 13, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2375/08
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to predominantly (>50 vol %) open-cell (to DIN ISO 4590-5 86), cold-deformable, rigid polyurethane foams which possess high acoustic absorption and a uniform cell structure and which are suitable for producing automotive interior trim, more particularly roof linings and pillar trim.

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