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Hyperbranched epoxy polymer-nano silicon dioxide composite chrome-free tanning agent and preparation method thereof

A nano-silica, epoxy polymer technology, applied in small raw hides/large raw hides/leather hides/fur chemical treatment, small raw hides/large raw hides/leather/fur treatment, tanning treatment, etc., can solve the problem of tanning problems. Uniform, impermeable, large specific surface area, etc., to achieve good antibacterial effect

Active Publication Date: 2021-01-05
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to nano-SiO 2 The specific surface area is large, the surface energy is high, and it is very easy to combine with the active groups of the protein molecular chain, but nano-SiO 2 Poor water solubility, difficult to penetrate, prone to uneven tanning

Method used

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  • Hyperbranched epoxy polymer-nano silicon dioxide composite chrome-free tanning agent and preparation method thereof
  • Hyperbranched epoxy polymer-nano silicon dioxide composite chrome-free tanning agent and preparation method thereof
  • Hyperbranched epoxy polymer-nano silicon dioxide composite chrome-free tanning agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of preparation method of hyperbranched epoxy polymer-nanometer silicon dioxide composite chrome-free tanning agent, carry out according to the following steps:

[0042] (1) Preparation of hydroxyl-terminated hyperbranched polymers

[0043] 1) Dissolve 0.5 mol of diethanolamine in 50 mL of anhydrous methanol in the reaction kettle at room temperature and under the protection of nitrogen, then slowly add 1 mol of methyl acrylate dropwise to the completely dissolved mixture, and raise the temperature to 40°C after the addition is completed, Insulated reaction for 4 h, after the reaction was completed, methanol and excess methyl acrylate were distilled off under reduced pressure to obtain a colorless and transparent oily AB 2 monomer;

[0044] 2) 0.16 mol of trimethylolpropane and 2% p-toluenesulfonic acid as catalyst (based on trimethylolpropane and AB 2 The total mass) into the reactor, heated to 110 ~ 120 ° C to completely dissolve the trimethylolpropane, slowly...

Embodiment 2

[0051] A kind of preparation method of hyperbranched epoxy polymer-nanometer silicon dioxide composite chrome-free tanning agent, carry out according to the following steps:

[0052] (1) Preparation of hydroxyl-terminated hyperbranched polymers

[0053] 1) Dissolve 1.0 mol of diethanolamine in 50 mL of anhydrous methanol at room temperature and under the protection of nitrogen in the reaction kettle, then slowly add 2.0 mol of methyl acrylate dropwise to the completely dissolved mixture, and raise the temperature to 40°C after the addition is completed , heat preservation reaction for 4h, after the reaction was completed, methanol and excess methyl acrylate were distilled off under reduced pressure to obtain a colorless and transparent oily AB 2 monomer;

[0054] 2) 0.42 mol of trimethylolpropane and 2% p-toluenesulfonic acid as catalyst (based on trimethylolpropane and AB 2 The total mass) into the reactor, heated to 110 ~ 120 ° C to completely dissolve the trimethylolpropa...

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Abstract

The invention relates to a preparation method of a hyperbranched epoxy polymer nano silicon dioxide composite chrome-free tanning agent, which comprises the following steps: reacting diethanol amine with methyl acrylate to obtain N,N-dihydroxyethyl-3-amidomethyl propionate; with trimethylolpropane as a reaction center core and N,N-dihydroxyethyl-3-amidomethyl propionate as a monomer (AB2 monomer),preparing hydroxyl-terminated hyperbranched poly (amine ester) by adopting a nucleated one-step method under the catalysis of p-toluenesulfonic acid pTSA; then, an epoxy chloropropane modification method is adopted for modification, and an epoxy-terminated hyperbranched polymer is synthesized; and finally, compounding the chrome-free tanning agent with nano silicon dioxide to obtain the compositechrome-free tanning agent. The hyperbranched epoxy polymer nano silicon dioxide composite chromium-free leather ecological tanning agent prepared by the invention has good water solubility, no toxicity and no pollution, the tanned leather is white and soft in color, fine in grain surface and good in extensibility, and the hyperbranched epoxy polymer nano silicon dioxide composite chromium-free leather ecological tanning agent has a wide application prospect as an environment-friendly leather chromium-free tanning agent.

Description

technical field [0001] The invention belongs to the technical field of leather chemicals and its synthesis, and in particular relates to a leather tanning agent containing multiple epoxy functional groups, tertiary amine groups and composite nano silicon dioxide and a preparation method thereof. Background technique [0002] Leather manufacturing is one of the earliest activities of human beings. According to relevant records, people in the eastern Mediterranean region began to use leaves, fruits, roots and other plant materials to process animal skins as early as the end of the Neolithic Age, so as to denature collagen and make them more durable. s material. Leather products have accompanied people for thousands of years, from the original rough warm items to the present exquisite luxury goods, representing the development and progress of the leather industry. In the tanning industry, chrome tanning has always been the most important method of leather tanning, because tann...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/02C14C3/04C14C3/22
CPCC14C3/02C14C3/04C14C3/22
Inventor 刘新华王优优崔博强姜慧娥王学川
Owner SHAANXI UNIV OF SCI & TECH
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