PLASTICS COLOURATION

摘要

A method of imparting colour to a plastic substrate comprising applying to the substrate, or incorporating within the substrate, a diacetylene compound of general formula (I) wherein n = 1 to 20; R1 = an optionally substituted C1-20 alkyl group which may contain heteroatoms; T = H, an optionally substituted C1-20 alkyl group which may contain heteroatoms or -(CH2)m-C(=O)-Q2R2; Q1 = NH, CO, NHCONH, OCONH, COS, NHCSNH or NR3, wherein m, Q2 and R2 are independently selected from the same groups as n, Q1 and R1 respectively; R3 is an optionally substituted C1-20 alkyl group which may contain heteroatoms; and irradiating the substrate to impart colour to the substrate.