Vibration-damping bitumen material (embodiments)

By incorporating thicker foil and higher filler content in the bitumen composition, the material's rigidity and damping properties are enhanced, addressing the limitations of existing materials in demanding automotive applications.

RU2865348C1Active Publication Date: 2026-07-01OBSHCHESTVO S OGRANICHENNOJ OTVETABTVENNOSTJU AVTOPLASTIK
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Patent Information

Authority / Receiving Office
RU · RU
Patent Type
Patents
Current Assignee / Owner
OBSHCHESTVO S OGRANICHENNOJ OTVETABTVENNOSTJU AVTOPLASTIK
Filing Date
2025-10-23
Publication Date
2026-07-01

AI Technical Summary

Technical Problem

Existing vibration-damping bitumen materials used in the automotive industry suffer from insufficient rigidity due to low reinforcing filler content and thin aluminum foil, limiting their application in specialized areas like car audio competitions where high sound pressure levels are required.

Method used

A vibration-damping bitumen material with a thicker aluminum foil (90 to 300 microns) and a bitumen composition comprising increased amounts of fillers such as chalk, cotton fibers, or wood flour, along with a reduced petroleum bitumen and plasticizer content, to enhance rigidity and damping properties.

Benefits of technology

The modified bitumen material exhibits improved mechanical loss coefficient and rigidity, shifting the damping peak to a positive temperature range, enhancing its performance in high-demand applications.

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Abstract

FIELD: automotive industry.SUBSTANCE: group of inventions relates to a vibration-damping bitumen material designed to reduce vibration in the body of a passenger car or truck as well as to increase its rigidity. The first embodiment proposes a vibration-damping bitumen material, made in a design with a limiting layer, which is an aluminium foil with a thickness of 90 to 300 mcm, and includes a layer based on a bitumen composition of the following composition, parts by weight: petroleum bitumen from 15 to 30, chalk from 65 to 85, cotton fibres from 1 to 5, plasticizer from 0.5 to 3. The second embodiment proposes a vibration-damping bitumen material, made in a design with a limiting layer, which is an aluminium foil with a thickness of 90 to 300 mcm, and includes a layer based on a bitumen composition of the following composition, in parts by weight: petroleum bitumen from 15 to 30, chalk from 45 to 75, wood flour from 5 to 20, cotton fibres from 1 to 5.EFFECT: increase in the rigidity and vibration-damping properties of the vibration-damping bitumen material.3 cl, 1 dwg, 2 tbl
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