A kind of hyperbranched epoxy polymer-nanometer silicon dioxide composite chrome-free tanning agent and preparation method thereof

A nano-silica, hyperbranched polymer technology, applied in the chemical treatment of small raw hides/large raw hides/leather hides/furs, small raw hides/large raw hides/leather/fur treatment, tanning treatment, etc., can solve the problem of tanning problems. uniformity, high surface energy, poor water solubility, etc., to achieve the effect of improving plumpness and good antibacterial effect

Active Publication Date: 2022-05-13
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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  • A kind of hyperbranched epoxy polymer-nanometer silicon dioxide composite chrome-free tanning agent and preparation method thereof
  • A kind of hyperbranched epoxy polymer-nanometer silicon dioxide composite chrome-free tanning agent and preparation method thereof
  • A kind of hyperbranched epoxy polymer-nanometer silicon dioxide composite chrome-free tanning agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A kind of preparation method of hyperbranched epoxy polymer-nanometer silicon dioxide composite chrome-free tanning agent, carry out according to the following steps:

[0040] (1) Preparation of hydroxyl-terminated hyperbranched polymers

[0041] 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 hours, 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;

[0042] 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, sl...

Embodiment 2

[0049] A kind of preparation method of hyperbranched epoxy polymer-nanometer silicon dioxide composite chrome-free tanning agent, carry out according to the following steps:

[0050] (1) Preparation of hydroxyl-terminated hyperbranched polymers

[0051] 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 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;

[0052] 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 trimethylolprop...

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Abstract

A kind of preparation method of hyperbranched epoxy polymer-nanometer silicon dioxide composite chrome-free tanning agent, first prepare N, N-dihydroxyethyl-3-aminopropionate methyl ester with diethanolamine and methyl acrylate reaction ; Taking trimethylolpropane as the reaction center core again, and N, N-dihydroxyethyl-3-aminopropionic acid methyl ester as a monomer (AB 2 monomer), under the catalysis of p-TSA with p-toluenesulfonic acid, the hydroxyl-terminated hyperbranched poly(amine-ester) was obtained by a one-step method with nuclei; Oxygen hyperbranched polymer; finally, compound it with nano silicon dioxide to obtain a composite chrome-free tanning agent. The hyperbranched epoxy polymer-nanometer silicon dioxide composite chrome-free leather ecological tanning agent prepared by the present invention has good water solubility, non-toxicity, and no pollution. After tanning, the leather is white in color, soft, fine in grain, and good in extensibility. , as an environmentally friendly leather chrome-free tanning agent has broad application prospects.

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 Patents(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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