Nine metal chlorides and mixtures of these salts with tartaric acid are compared with hydrochloric acid with regard to catalytic activity in crosslinking cotton fabrics with formaldehyde by the pad-dry-cure process. The sequence of catalytic activity can be rationalized by the hard/soft concept of acids and bases. When highly active catalysts are applied, the relation between dry crease-recovery angle and tensile strength is significantly improved for DMEU-cross-linked fabrics but only marginally improved when formaldehyde is used as the crosslinker.
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References
1.
AnnenO.RouetteH. K.RysP.ZollingerH., Quellung, Diffusion und chemische Reaktion im Vernetzungssystem Formaldehyd-Zellulose, Textilveredlung7, 528–540 (1972).
2.
Bancroft, J., & Sons Co., “Catalyst and Process for the Heat Curing of Fabrics,” Brit. Pat. 936,993 (1958).
3.
Courtaulds North America Inc., “Treatment of Cellulosic Materials,” Brit. Pat. 1,057,037 (1962).
4.
DolmetschH., Ueber die Ursache des Festigkeitsverlustes der Baumwolle während der Knitterfestausrüstung, Melliand Textilber. 45, 542–547 (1964).
5.
HushebeckH. R., “Catalyst System for Heat Curing of Fabrics,” U. S. Pat. 3,186,954 (1965).
6.
KokotS.MeyerU.ZürcherJ., Migration and Distribution of Crosslinking Reagents in Cellulosic Substrates. Part II: An Interpretation of Cross-Section Photographs of Crosslinked Cotton Fabric Stained with Rhodamine B, Textile Res. J. 46, 233–238 (1976).
7.
KravetzL.FerranteG. R., A New Catalyst System for Crosslinking Cotton Cellulose with Formaldehyde, Textile Res. J. 40, 362–369 (1970).
8.
MeyerU.MüllerK.ZollingerH., Mechanismus der Katalyse der Baumwollvernetzung und die mit hochaktiven Katalysatoren erzielbaren textilmechanischen Effekte, Textilveredlung10, 293–297 (1975).
9.
MeyerU.MüllerK.ZollingerH., The Mechanism of Catalysis in the Crosslinking of Cotton with Formaldehyde, Textile Res. J. 46 (10), (1976).
10.
MeyerU.MüllerK.ZollingerH., Comparison of Textile Mechanical Properties of Cotton in Crosslinking with Dimethylolethylene Urea and Formaldehyde, Textile Res. J. 46 (11), (1976).
11.
MeyerU.MüllerK.ZollingerH., The Temperature Dependence of the Rate of Crosslinking with Formaldehyde and of the Hydrolysis of Cotton Cellulose, Textile Res. J. 46 (12), (1976).
12.
MüllerK., “Die Ursache der schlechten Effekt-Festigkeits-relation formaldehydvernetzter Baumwollgewebe, Mechanismus der Katalyse unter spezieller Berücksichtigung hochaktiver Katalysatoren” Ph.D. Thesis No. 5381, ETH, Zürich, 1974.
13.
ParsonsW. N.MonaG. E., “Reaction Mixture of Formaldehyde-Hydrazide-Triazone for Treating Cellulosic Textiles,” U. S. Pat. 3,090,665 (1963).
14.
PearsonR. G., Hard and Soft Acids and Bases, J. Amer. Chem. Soc. 85, 3533–3539 (1963).
15.
PearsonR. G., Soft and Hard Acids and Bases, Chem. Eng. News43, 90–91 (May 31, 1965).
16.
PearsonR. G., Hard and Soft Acids and Bases, Chem. Brit. 3, 103–107 (1967).
17.
PierceA. G.Jr.FrickJ. G.Jr., Highly Active Catalysts for Wrinkle Resistance and Wash-Wear Finishing of Cotton Fabric, Amer. Dyest. Reptr. 57, 864–868 (1968).
18.
Quantitative Stickstoffbestimmung, Triatex-Norm 44–65 (1965), Firma Triatex International AG, Zürich.
19.
RamanathanS.RivlinJ.StammO.ZollingerH., The Determination of Formaldehyde in Cellulose Formals and Methylated Cellulose Formals, Textile Res. J. 38, 63–71 (1968).
20.
RavikrishnanM. R.WadiaM. J.ChipalkattiH. R., “Catalyst for Resin Finishing of Cellulose Textiles,” 1er Symposium International de la Recherche Textile Cotonniére (Sirtec), Institut Textil de France, Paris, 1969.
