Journal Textile Coloration and Finishing Year / Vol., Issue, Month 2015 / V.27,no.1,Mar Title Synthesis of Super Hydrophobic Disazo Red Dyes using Alkylanilines as Diazo Components Authors Taekyeong Kim†, Myeonghwa Ryu and Youngjae Jang Institution/Affiliations Kyungpook National University Pages/Total page pp.27 ~ 34 / 8 Language Korean Abstract Abstract: Novel super hydrophobic disazo red dyes were synthesized to improve light fastness of the primary monoazo red dye of previous study on polyolefin fibers such as polypropylene and ultra high molecular weight polyethylene fibers. 4-Alkylanilines were diazotized and then coupled to 2,5-dimethylaniline to produce dye intermediates which were then further used to synthesize final disazo red dyes by diazoization and coupling to β-naphthol. Considering both affinity of the dyes toward both polyolefin fibers and color fastnesses, the decyl-substituted dye was determined as the optimum dye. The decyl-substituted disazo red dye exhibited good dyeability on both polyolefin fibes and almost the same color values as the previous primary monoazo red dye. Light fastness on ultra high molecular weight polyethylene fibers was improved up to rating 3~4 compared to rating 2~3 of the previous primary monoazo red dye. Keywords Keywords: polypropylene, UHMWPE, disazo dye, red color, hydrophobicity Download   Reference http://www.koreascience.or.kr/article/ArticleFullRecord.jsp?cn=OSGGBT_2015_v27n1_27&ordernum=4