Basazol dyes

Basazol dyes, 9 489-490 Base-catalyzed coupling, 10 356 Base-catalyzed ketone condensation,... 

The Basazol dyes are based on this principle and they make use of a polyfunctional cross-linking agent known as Fixing. gent P, the exact constitution of which has not been revealed. 

The tris(acryloyl) derivative (R is CH = CH2) was subsequently developed as a fixing agent for use with the Basazol(BASF) dyes in the printing of cellulosic fibres, in conjunction with urea as hydrotrope [444]. It has also been shown [445] that aftertreatment with 1,3,5-tris(acryloyl)hexahydro-s-triazine or the tris ((3-chloropropionyl) derivative improves the wet... 

In further work on nylon [145], this trifunctional reactant was applied simultaneously with various nucleophilic dyes of the aminoalkyl type (Scheme 7.71). As in the case of the Basazol system on cellulose (Scheme 7.60), the intended formation of covalent dye-fibre linkages has to compete with side reactions, such as partial hydrolysis (Scheme 7.70), di- or trimerisation that may lead to less than optimum fastness, or substrate crosslinking that may adversely influence desirable fibre characteristics. 

These compounds are valuable as aminomethylating reagents (see Section 2.20.3.11). In addition, l,3,5-triacryloylhexahydro-l,3,5-triazine, triacryloformal (213), forms the basis of the Basazol range of reactive dyes (65AG(E)312). The schematic reaction is shown in Scheme 118. The colour yield is very high (ca. 90%). 

Basazol [BASF]. TM for dyes used in printing and dyeing paper composed of cellulosic fibers. 

Basazol . [BASF AG] Basic dyes for ptqjermaking, leather. 

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