auswuchtmasse for tyres, process for the production of such a auswuchtmasse and method for balancing a fahrzeugrads through such a auswuchtmasse.

摘要

A thixotropic tyre balancing composition having a yield stress value between 30 Pa and 260 Pa, preferably about 120 Pa, is capable of balancing tyres by being able to flow under the influence of the vibrations induced when a heavy spot on the tyre hits the road surface. The accompanying Figure 4 shows how the balancing composition (22) distributes itself in a wheel assembly consisting of a tyre (16) mounted on a rim (12) and having a heavy spot (18). The composition preferably comprises a mixture of: 1) a liquid di- or trihydric alcohol or a di-, tri- or tetrameric oligomer thereof, optionally containing water; 2) a polymer soluble or dispersible in the alcohol; 3) hydrophilic fibers; and optionally, 4) a hydrophilic filler. The alcohol 1) is preferably a diol of the general formula HO-(CH(R)-CH2-O)n-H wherein R is hydrogen or C1-2 alkyl and n is an integer from 1 to 4.