Naslov
Non-Formaldehyde Wrinkle-Free Finishing with Polycarboxylic Acids

Autori
Bischof Vukušić, Sandra ; Katović, Drago

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
The 80th World Conference of the Textile Institute, Manchester, UK, 16-19 April 2000 / Hennessey, Terry - Manchester : The Textile Institute International, 2000

Skup
The 80th World Conference of the Textile Institute

Mjesto i datum
Manchester, Ujedinjeno Kraljevstvo, 17.04.2000. - 19.04.2000

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
textile finishing; polycarboxylic acids

Sažetak
There is a constant increase in demand for easy-care wrinkle-resistant cotton apparel on the market. Finding competitively priced non-formaldehyde DP finishes has become the highest priority for the textile finishing industry. Polycarboxylic acids are gaining recognition as a new class of formaldehyde-free DP agents. Different PCAs have been investigated, for example, citric (CA), oxalic, succinic, malic, maleic, fumaric, tricarballic, butanetetracarboxylic (BTCA) and cyclopentanetetracarboxylic acid. Exceedingly high costs of BTCA have prevented its commercial application in the industry. Citric acid has some advantages, such as low costs, widespread availability and ecological acceptability, but its great disadvantage is noticeable fabric yellowing under conventional curing conditions. The addition of moderate amounts of BTCA considerably increases the effectiveness of citric, malic and other -hydroxyl acids in formaldehyde-free DP finishing of cotton. These hydroxyl groups hinder the esterification of PCA with cellulose. CA can form ester linkages with anhydride intermediates of PCA polymers and transform itself from a trifunctional acid to a tetrafunctional one. For the modification of PCA, some studies have been made with phosphono- or phosphinocarboxylic acids. These phosphorus derivatives were chemically linked with crosslinking agents, and cellulose was esterified by activating carboxyl groups with hydroxyphosphoryl groups. Further modification was made in the present study with phosphonic acid as catalyst added to CA, BTCA or their mixture together with hypophosphite (SHP) catalyst system. Textile properties of the fabric treated with the new system are better than or equal to those treated with a PCA – SHP system.

Izvorni jezik
Engleski

Znanstvena područja
Tekstilna tehnologija

POVEZANOST RADA