Oxidative, reductive, hydrolytic and other enzymatic systems...

D - Textiles – Paper – 21 – C

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D21C 5/00 (2006.01)

Patent

CA 2564380

The invention relates to methods for oxidizing (redox reactions), preferably pulps (delignification/bleaching), for carrying out coupling reactions (grafting polymer materials) or for carrying out cross-linking reactions of natural (i.e. having natural origin) or artificial (i.e. synthetically produced) monomers to polymers or mixtures of natural and artificial polymers or fiber materials, of lignocellulose-containing, cellulose-containing or proteinaceous natural polymers or fiber materials such as pulp, textiles such as cotton or wool. The invention is characterized in that 1) these oxidation, coupling or cross-linking reactions are carried out using hydrolases such as lipases, esterases, proteases, amidases, transferases, acylases, glycosidases or glycotransferases or oxireductases, such as preferably peroxidases, chloroperoxidases and laccases, either individually or in combination with one another; and 2) that these reactions (oxidation, coupling or cross-linking reactions) are carried out with the above-mentioned substances and/or with property-changing substances such as monomer to polymer substances (natural or synthetic) either simultaneously or one after the other using specific enzyme- activated enhancer substances and/or coupling substances.

L'invention concerne un procédé d'oxydation (réactions rédox), de préférence, de pâtes de cellulose (délignification/blanchiment) pour des réactions de couplage (grafting de matières polymériques) ou des réactions de réticulation de monomères à polymères naturels (càd existant dans la nature) ou artificiels (càd de production synthétique) ou mélanges entre polymères naturels et synthétiques ou matières fibreuses, de polymères naturels contenant de la lignocellulose, de la cellulose ou des protéines ou encore des matières fibreuses comme la pâte de cellulose, des textiles comme le coton ou la laine. L'invention est caractérisée en ce que: 1) ces oxydations, réactions de couplage ou réactions de réticulation à l'aide d'hydrolases comme les lipases, estérases, protéases, amidases, transférases, acylases, glycosidases ou glycotransférases ou oxydoréductases, comme de préférence péroxidases, chloropéroxydases et laccases, sont exécutées soit de manière isolée, soit en association. L'invention est également caractérisée en ce que: 2) ces réactions (oxydations, réactions de couplage ou réactions de réticulation) avec les substances susmentionnées et/ou avec des matières modifiant les propriétés comme les substances monomères à polymères (naturelles ou synthétiques), sont exécutées simultanément ou successivement à l'aide de substances d'amélioration à activation enzymatique spéciales et/ou des substances de couplage.

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