Method for preparing modified collagen polypeptide leather making filler from chrome-free polymetal tanning leather meal
A collagen peptide, multi-metal technology, applied in leather impregnation, small raw hide/large raw hide/leather/fur treatment, small raw hide/large raw hide/leather hide/fur chemical treatment, etc. Molecular weight, saving tanning cost, high hydrolysis rate
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Embodiment 1
[0020] A method for preparing a modified collagen polypeptide tanning filler from chromium-free multi-metal tanned leather shavings, comprising the steps in turn:
[0021] Step (1) Hydrolysis of leather shavings: take a certain amount of leather shavings and place them in a reactor, based on the quality of leather shavings, add 1% surfactant, 0.5% degreasing agent, 10 times of water, soak and stir the leather shavings for 2 hours, Drain the water, then wash with water twice; add 15% oxalic acid, 7.5 times water, stir and react at 90°C for 8 hours, filter and dry to obtain collagen polypeptide;
[0022] Step (2) Collagen polypeptide modification: Take a certain amount of collagen polypeptide and add it to the reactor. Based on the quality of the collagen polypeptide, add 3 times of water to dissolve it, add 100% absolute ethanol while stirring, add 20% triethylamine, add 40% tetrakis hydroxymethyl quaternary phosphonium salt, adjust the pH to 7, stir and react at 30°C for 6 hou...
Embodiment 2
[0024] A method for preparing a modified collagen polypeptide tanning filler from chromium-free multi-metal tanned leather shavings, comprising the steps in turn:
[0025] Step (1) leather shavings hydrolysis: take a certain amount of leather shavings and place them in a reactor, based on the quality of leather shavings, add 2% surfactant, 0.2% degreasing agent, 15 times of water, soak and stir the leather shavings for 5 hours, Drain the water, then wash with water twice; add 20% oxalic acid, 10 times of water, stir and react at 80°C for 5 hours, adjust the temperature, stir and react at 60°C for 5 hours, filter and dry to obtain collagen polypeptide;
[0026] Step (2) Collagen polypeptide modification: Take a certain amount of collagen polypeptide and add it to the reactor. Based on the quality of the collagen polypeptide, add 5 times of water to dissolve it; take 100% vinyl-containing quaternary ammonium salt in the container, add vinyl-containing quaternary ammonium salt 10...
Embodiment 3
[0028] A method for preparing a modified collagen polypeptide tanning filler from chromium-free multi-metal tanned leather shavings, comprising the steps in turn:
[0029] Step (1) Hydrolysis of leather shavings: take a certain amount of leather shavings and place them in a reactor, based on the quality of leather shavings, add 0.5% surfactant, 1% degreasing agent, 8 times the water, soak and stir the leather shavings for 1 hour, Drain the water, then wash with water twice; add 10% oxalic acid, 15 times water, stir at 70°C for 4 hours, 50°C for 6 hours, and 30°C for 8 hours, filter and dry to obtain collagen polypeptide;
[0030] Step (2) Collagen polypeptide modification: Take a certain amount of collagen polypeptide and add it to the reactor. Based on the quality of the collagen polypeptide, add 5 times the water to dissolve it; take 50% of the vinyl-containing quaternary ammonium salt in the container, and add the vinyl-containing quaternary ammonium salt. 100% water of qua...
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