Patent ID: 9044911
Filing Date: 2015-06-02
Classification: B29D,B60C,C08J,C08L

Abstract:
1. A method of producing coloured tyre portions, said method comprising: a step of forming an impermeable barrier layer; and a step of depositing a dye or coloured layer on said barrier layer; said method being characterized in that the step of forming the barrier layer comprises, in sequence, the operations of (a) depositing an aqueous dispersion on the part of the tyre for colouring; (b) separating said aqueous dispersion into an aqueous phase and a solid phase; and (c) removing said aqueous phase; said aqueous dispersion comprising at least one cross-linkable polymer base and a surfactant according to the following molecular formula (I) or molecular formula (II): wherein in molecular formula (I): R R R X is a metallic cation, and n is an integer of 1 to 3; wherein in molecular formula (II): X is an atom or anionic group, R R n is 0 or 1, y is 1, if n is 1; y is 1 or 2, if n is 0, R at least one of R