Rubber-based soundproofing material

US6790894B1 · kind B1 · utility

Assignee

• Thüringen GmbH · DE

Inventors

• Frank Albracht · Waltershausen, DE
• Gerd Lotze · Dresden, DE
• Karl-Heinz Krause · Chemnitz, DE
• Gerhard Merkmann · Gotha, DE
• Wolfgang Timm · Gotha, DE

Key dates

• Filing date: Jun 5, 2002
• Grant date: Sep 14, 2004
• Expiry date: Jul 13, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31855
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A rubber-based soundproofing material comprises a mixture of a rubber blend, a metal or its oxides, alloys or salts, and conventional mixing ingredients. The mixture is either a non-blended chlorobutyl rubber, bromobutyl rubber or acrylate rubber, or a blend of nitrile rubber or styrene-butadiene rubber with epoxidized natural rubber. The mixture has the following proportions: 10-15% by wt. rubber or rubber blend, 85-40% by wt. metal or its oxides, alloys or salts, and 5-10 wt. % mixing ingredients.