| 主权项 |
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):
(R1CONR2CHR3COO−)n Xn+ (I) wherein in molecular formula (I): R1 is an aliphatic group C6-C23, R2 is H or an aliphatic group C1-C8, R3 is H or an aliphatic or aromatic group C1-C8, X is a metallic cation, and n is an integer of 1 to 3;
([R4R5R6NR8(NR7R9R10)n](n+1)+)y (n+1)Xy− (II) wherein in molecular formula (II): X is an atom or anionic group, R4, R5and R6, which are the same or different, are each CmH2m+1, where m is 1 to 3, or CH2CHCH2 or CHCHCH3, R7, R9 and R10, which are the same or different, are each CH2CHCH2 or CHCHCH3, n is 0 or 1, y is 1, if n is 1; y is 1 or 2, if n is 0, R8 is an aliphatic group C15-C22, when n is 0; and is an aliphatic group C8-C16, when n is 1, and at least one of R4, R5, R6 and R8 comprises a double bond, when n is 0. |
