100results about How to "Improve tanning effect" patented technology

The invention discloses a preparation method of a widely distributed multifunctional group polysaccharide-based ligand and metal complex tanning agent. The preparation method is characterized in that polysaccharide is oxidized through hydrogen peroxide under high temperature and high pressure, constituents are completely reserved, and widely distributed polysaccharide-based ligand is prepared; and then chromium-free metal salt is added into the polysaccharide-based ligand, and the complex tanning agent is obtained through coordination reaction. The complex tanning agent can be evenly distributed in hierarchical structures of leather collagen, and through reaction between the leather collagen and a coordination bond as well as a covalent bond, leather / fur can have the excellent hydrothermal stability and sensory property.

The invention relates to the technical field of tanning, and discloses a cationic cyanuric chloride derivative tanning agent and a preparation method thereof. The preparation method comprises the following steps of stirring and uniformly mixing 9.22-36.88 parts by mass of cyanuric chloride, 21.35-100.31 parts by mass of solvent and 7.12-33.44 parts by mass of deionized water under the ice-water bath condition to obtain a mixture A, dropwise adding 2.98-20.44 parts of tertiary ammonia compounds into the mixture A, and maintaining the temperature at 0-5 DEG C to obtain a mixed system, adjusting the pH value of the mixed system by using an acid-binding agent solution until the pH value is stabilized at 6.0-7.0, and reacting for 4-6 hours to obtain a mixture B, and filtering the mixture B to obtain a filter cake, washing the filter cake, carrying out vacuum drying under a vacuum condition for 4-6 hours to obtain a solid C, and grinding and crushing the solid C to obtain the white powdery cationic cyanuric chloride derivative tanning agent. In use, the characteristic that the cationic property of tanning leather fibers of a conventional chrome-free tanning agent is weakened can be improved, and meanwhile, the absorption and combination of crust leather on anion dyeing and finishing materials in the later dyeing and fat liquoring section can be improved.

The invention belongs to leather process technology, in particular a method for producing chamois leather using epoxidized oil, comprising the following steps: putting the pretanned pelt or fur into the normal temperature controlled rotary drum, adding alkaline solution to adjust pH value into alkaline, draining the alkaline solution, and adding catalyst or accelerant and epoxidized oil into the rotary drum, keeping the temperature at a certain temperature for several times, after reacting, recycling the remaining oil, then washing using degreasant and / or alkali, then adjusting pH value, aluminum tanning, aldehyde tanning or other tanning, and then drying, dampening and milling, finally gaining the chamois leather. The invention enables epoxidized oil to directly react with collagen and fix oil on the hide fiber, so that the shortcoming that traditional oil tanning takes oil as raw material, instead of reactant is overcome, and oil oxidizing process of traditional chamois leather is omitted. The chamois leather produced by the method has advantages of high intensity, good flexibility, strong hygroscopicity and water-wash resistance, applicable for the leather for cleaning, filtering and washing clothes.