| 摘要 |
The use of UV absorbers for increasing the yield in dyeing polyester fibre materials is claimed, then UV absorbers being 2,4-dialkyl- or 2,4-diphenyl-6-(2-hydroxyphenyl)-1,3-5-triazines of formula (I), where R1, R2 = 1-5C alkyl, opt. substd. by OH, 1-5 C alkoxy, 1-5C alkylthio, NH2 or mono- or di-(1-5C alkyl)-amino; or phenyl, opt. substd. by halogen, OH, 1-5C alkyl or 1-5C alkoxy; R = H, 1-5C alkyl, 1-5C alkoxy, halogen, OH or (O-CH2-CH2-)p-R3 (R3 = H or 1-5C alkyl; p = 1-5); n = 1 or 2.
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