Pasty damping agent dispersion

Claim 2

A pasty-like damping medium dispersion for damping mechanical and acoustical vibrations and consisting essentially of: (1) a fluid phase selected from the group consisting of polyethylene glycols, polypropylene glycols, polybutylene glycols and saturated aliphatic and aromatic carboxylic acid esters; (2) ground graphite having a leaf-shaped and/or spherical structure and a particle size of less than 100μ and being present in an amount of 40-60% by weight relative to the total weight of the dispersion; (3) a wetting agent for the graphite in an amount of 0.5-6% by weight relative to the total weight of the dispersion; and (4) a viscosity stabilizer selected from the group consisting of an aluminum silicate and/or silicon dioxide and being employed in an amount of 0.5-5% by weight relative to the total weight of the dispersion; said dispersion having a viscosity of (1-4)×10 6 cP at 25° C. and being self-sealing.

Claim 3

The pasty-like damping medium dispersion of claim 1 wherein the dispersion has a viscosity of (1.5-3)×10 6 cP at 25° C.

Claim 4

A pasty damping agent dispersion as claimed in claim 1, wherein the fluid phase is an ester of a saturated aliphatic alcohol with a saturated aliphatic C 5 -C 12 monocarboxylic acid.

Claim 5

A pasty damping agent dispersion as claimed in claim 3, wherein the ester is a carboxylic acid ester of trimethylpropanol, octyl alcohol, nonyl alcohol and/or decyl alcohol.

Claim 6

A pasty damping agent dispersion as claimed in claim 3, wherein the ester is caproic acid decylester.

Claim 7

A pasty damping agent dispersion as claimed in claim 1, wherein the fluid phase is an ester of a saturated aliphatic C 5 -C 12 alcohol with glutaric, adipic or pimelic acid.

Claim 8

A pasty damping agent dispersion as claimed in claim 1, wherein the fluid phase is dioctyl-adipic acid ester, didecyladipic acid ester, octyl-decyl-adipic acid ester and/or trimethylpropane-adipic acid-octyl decylester.

Claim 9

A pasty damping agent dispersion as claimed in claim 1, wherein the fluid phase is a C 5 -C 12 dialkyl ester of benzene dicarboxylic acid or a C 5 -C 12 trialkyl ester of benzene tricarboxylic acid.

Claim 10

A pasty damping agent dispersion as claimed in claim 8, wherein the diester is the dioctylester or didecylester of phthalic, isophthalic or terephthalic acid.

Claim 11

A pasty damping agent dispersion as claimed in claim 8, wherein the triester is the trihexylester of the benzene tricarboxylic acids.

Claim 12

A pasty damping agent dispersion as claimed in claim 1, wherein the aluminum silicate is an organophilic bentonite.

Claim 13

A pasty damping agent dispersion as claimed in claim 1, wherein the aluminum silicate is ground asbestos.

Claim 14

A pasty damping agent dispersion as claimed in claim 1, wherein the graphite consists of a mixture having particle sizes of between 1μ and 0.5μ.

Claim 15

A pasty damping agent dispersion as claimed in claim 1, wherein the graphite is at least 98.5% pure.

Claim 16

A pasty damping agent dispersion as claimed in claim 1, wherein an amino salt of oleic, linoleic, tallow fat, palmitic acid and/or stearic acid is used as the wetting agent.

Claim 17

A pasty damping agent dispersion as claimed in claim 1, wherein the graphite is present in an amount of approximately 50% by weight relative to the total weight of the dispersion.

Claim 18

A pasty damping agent dispersion as claimed in claim 16, wherein the graphite has a particle size of approximately 1μ.

Claim 19

A pasty damping agent dispersion as claimed in claim 1, wherein the amorphous silicon dioxide is present in an amount of approximately 3% by weight relative to the total weight of the damping agent dispersion.

Claim 20

A pasty damping agent dispersion as claimed in claim 18, wherein the amorphous silicon dioxide has a maximum grain size of 0.1μ.

Claim 21

A pasty damping agent dispersion as claimed in claim 1, further comprising 0.1-3% by weight relative to the total weight of the dispersion of an anti-oxidizing agent.

Claim 22

A pasty damping agent dispersion as claimed in claim 20, wherein sterically restricted alkylphenols and/or thiophenols are employed as the anti-oxidizing agent.

Claim 23

A pasty damping agent dispersion as claimed in claim 20, wherein the anti-oxidizing agent is methylene-4,4-bis-(2,6-ditert.-butylphenol) or ditert.-butyl-p-cresol.

Claim 24

In a method of damping mechanical and acoustical vibrations employing a damping device having a chamber containing a damping medium, the improvement comrising employing as the damping medium a pasty-like damping medium dispersion consisting essentially of: (1) a fluid phase selected from the group consisting of polyethylene glycols, polypropylene glycols, polybutylene glycols and saturated aliphatic and aromatic carboxylic acid esters; (2) ground graphite having a leaf-shaped and/or spherical structure and a particle size of less than 100μ and being present in an amount of 40-60% by weight relative to the total weight of the dispersion; (3) a wetting agent for the graphite in an amount of 0.5-6% by weight relative to the total weight of the dispersion; and (4) a viscosity stabilizer selected from the group consisting of an aluminum silicate and/or silicon dioxide and being employed in an amount of 0.5-5% by weight relative to the total weight of the dispersion; said dispersion having a viscosity of (1-4)×10 6 cP at 25° C. and being self-sealing.

Claim 25

In a method of damping mechanical and acoustical vibrations employing a damping device having a chamber containing a damping medium, the improvement comrising employing as the damping medium a pasty-like damping medium dispersion consisting essentially of: (1) a fluid phase selected from the group consisting of polyethylene glycols, polypropylene glycols, polybutylene glycols and saturated aliphatic and aromatic carboxylic acid esters; (2) ground graphite having a leaf-shaped and/or spherical structure and a particle size of less than 100μ and being present in an amount of 40-60% by weight relative to the total weight of the dispersion; (3) a wetting agent for the graphite in an amount of 0.5-6% by weight relative to the total weight of the dispersion; and (4) a viscosity stabilizer selected from the group consisting of an aluminum silicate and/or silicon dioxide and being employed in an amount of 0.5-5% by weight relative to the total weight of the dispersion; said dispersion having a viscosity of (1-4)×10 6 cP at 25° C. and being self-sealing.

Claim 26

The method of claim 23 wherein the pasty-like damping medium dispersion has a viscosity of (1.5-3)×10 6 cP at 25° C.

Claim 27

The method of claim 23 wherein the fluid phase of the damping medium dispersion is an ester of a saturated aliphatic alcohol with a saturated aliphatic C 5 -C 12 monocarboxylic acid.

Claim 28

The method of claim 25 wherein the fluid phase is a carboxylic acid ester of trimethylpropanol, octyl alcohol, nonyl alcohol and/or decyl alcohol.

Claim 29

The method of claim 25 wherein the fluid phase is caproic acid decylester.

Claim 30

The method of claim 23 wherein the fluid phase is an ester of a saturated aliphatic C 5 -C 12 alcohol with glutaric, adipic or pimelic acid.

Claim 31

The method of claim 23 wherein the fluid phase is dioctyl-adipic acid ester, didecyl-adipic acid ester, octyl-decyl-adipic acid ester and/or trimethylpropanol-adipic acid-octyl decylester.

Claim 32

The method of claim 23 wherein the fluid phase is a C 5 14 C 12 dialkyl ester of benzene dicarboxylic acid or a C 5 -C 12 trialkyl ester of benzene tricarboxylic acid.

Claim 33

The method of claim 30 wherein the fluid phase is the dioctylester or didecylester of phthalic, isophthalic or terphthalic acid.

Claim 34

The method of claim 30 wherein the fluid phase is the trihexylester of benzene tricarboxylic acid.

Claim 35

The method of claim 23 wherein the wetting agent of the damping medium dispersion is an amino salt of oleic, linoleic, tallow fat, palmetic acid and/or stearic acid.

Claim 36

The method of claim 23 wherein the damping agent dispersion also contains 0.1 to 3% by weight relative to the total weight of the dispersion of an anti-oxidizing agent.