K&L Gates LLP
Rigid polyurethane foams with high acoustic absorption
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.
Covestro Deutschland AG
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Ling Joern Rolf Lutz Jun
Shi Beaujean Albach Boehnke Li