Importance

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Abstract

The invention describes a composite microfiber, which is comprising a polysaccharide polymer selected from the group consisting of cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, methyl cellulose, ethyl cellulose, n-propyl cellulose, isopropyl cellulose, cellulose acetate and combinations of two or more of these substances, and combinations of two or more of these substances, thereby the polysaccharide polymer further comprising substituents comprising a given formula, wherein k is 1 or greater, and wherein each moiety R₁ is independently selected from H and methyl, and wherein each moiety R₂ is independently selected from —H, —OH, —NH₂, —SH, —OR₃, —NHR₃ and —NR₃R₄, —SR₃, and wherein each moiety R₃ and R₄ are chemical groups independently selected from C1-C4 alkyl, C1-C4 alkoxy, C1-C4 alkoxy halide and C1-C4 heteroalkyl substituents, and is preferably selected from —CH₃, —CH₂—CH₃, —CH₂—OH, —CH₂—CH₂—OH, —CH₂—CH₂—NH₂, —CH—CH(OH)—CH₂—OH, —CH—CH(OH)—CH₃, glycidyl, anhydride, sulfonic acid and hydroxysuccinimide, said substituents forming a hydrogel in the presence of water, and said composite microfiber having a swelling factor of at least 10%, preferably of 10-400%.

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First Claim