TYRE BALANCING COMPOSITIONS
First Claim
1. A tyre balancing composition, which comprises a visco-plastic gel and solid bodies having an average smallest dimension in the range of 1-5 mm such that the solid bodies move through the gel upon forces induced by tire imbalance, wherein the visco-plastic gel has a storage modulus (G′
- ) between 1000 Pa and 25000 Pa at 22°
C., a loss modulus (G″
) smaller than the storage modulus, and a critical yield stress above 3 Pa at 22°
C.
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Accused Products
Abstract
The invention relates to tyre balancing compositions having improved balancing properties comprise a visco-plastic gel and solid bodies having an average smallest dimension in the range of 0.5-5 mm; preferably 1-4 mm, more preferably around 3 mm. When applied in a layer to the inside of a motor vehicle tyre, the compositions act by allowing the solid bodies move through the gel and to concentrate in areas to counteract 10 imbalances. The solid bodies preferably have an average ratio a between their smallest and their largest dimension of α≦2, more preferably α≦1.5, especially around 1. The visco-plastic gel preferably has a storage modulus (G′) between 1000 Pa and 25000 Pa at 22° C., a loss modulus (G″) smaller than the storage modulus, and a critical yield stress above 3 Pa at 22° C. The bodies may be shaped as prolate or oblate ellipsoids, cylinders, 15 rectangular paralleipipeds, or spheres, or mixtures of such bodies; they may have an apparent specific gravity in the range of 500-3000 kg/m3, preferably 600-2000 kg/m3, in particular 700-1000 kg/m3, especially 800-900 kg/m3; they may be made from polyolefins, polystyrene, polyvinyl chloride, polyamide, rubber or glass. The weight ratio between the solid bodies and the gel is from 10:1 to 1:10, preferably from 5:1 to 1:5, in particular from 20 2:1 to 3:1, such as from 1:1 to 1:2. The invention further concerns a tyre balancing kit and a method for balancing automobile wheel assemblies.
19 Citations
38 Claims
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1. A tyre balancing composition, which comprises a visco-plastic gel and solid bodies having an average smallest dimension in the range of 1-5 mm such that the solid bodies move through the gel upon forces induced by tire imbalance, wherein the visco-plastic gel has a storage modulus (G′
- ) between 1000 Pa and 25000 Pa at 22°
C., a loss modulus (G″
) smaller than the storage modulus, and a critical yield stress above 3 Pa at 22°
C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 37)
- ) between 1000 Pa and 25000 Pa at 22°
-
20. A tyre balancing composition kit comprising
i) a first container containing a visco-plastic gel, wherein the visco-plastic gel has a storage modulus (G′ - ) between 1000 Pa and 25000 Pa at 22°
C., a loss modulus (G″
) smaller than the storage modulus, and a critical yield stress above 3 Pa at 22°
C., andii) a second container containing solid bodies having their average smallest dimension in the range of 1-5 mm such that the solid bodies move through the gel upon forces induced by tyre imbalance when exposed to the gel. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 38)
- ) between 1000 Pa and 25000 Pa at 22°
Specification