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Amphiprotic acrylic resin leather tanning agent

A technology of acrylic resin and leather, which is applied in the field of synthesis of leather chemicals, can solve problems such as discoloration, and achieve the effects of reduced dosage, excellent water solubility, and excellent application performance

Inactive Publication Date: 2013-09-04
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the retanning agent is an anion-nonionic acrylic resin tanning agent, and the phenomenon of "discoloration" may still occur during use

Method used

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  • Amphiprotic acrylic resin leather tanning agent
  • Amphiprotic acrylic resin leather tanning agent
  • Amphiprotic acrylic resin leather tanning agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of preparation method of amphoteric acrylic resin leather tanning agent comprises the following steps:

[0022] 1) Dissolve 12.0 grams of acrylic acid and 12.0 grams of methacrylic acid in 59.4 grams of deionized water, stir at 10-20 ° C, add 40.8 grams of 30% sodium hydroxide aqueous solution dropwise in 30 minutes, and then add it in 10 React at ~20°C for 15 minutes to obtain monomer aqueous solution A;

[0023] 6.0 grams of dimethylaminoethyl acrylate, 18.0 grams of acrylamide, and 3.0 grams of ethylene glycol were dissolved in 50.0 grams of deionized water to obtain monomer aqueous solution B;

[0024] Make the initiator aqueous solution C of mass concentration 5% with 2.4 grams of ammonium persulfate;

[0025] 2) Add 12.0 grams of allyl polyether APEG-500 and 25.0 grams of deionized water into the reactor equipped with a stirrer and a reflux condenser, stir and raise the temperature to 75-80°C, and add dropwise within 2.5-3.0 hours Step 1) The prepared mon...

Embodiment 2

[0027] A kind of preparation method of amphoteric acrylic resin leather tanning agent comprises the following steps:

[0028] 1) Dissolve 15.0 grams of acrylic acid and 15.0 grams of methacrylic acid in 44.6 grams of deionized water, stir at 10-20°C, add 71.4 grams of potassium hydroxide aqueous solution with a mass concentration of 30% within 1 hour, and place in the React at 10-20°C for 15 minutes to obtain monomer aqueous solution A;

[0029] 12.0 grams of dimethylaminoethyl methacrylate, 12.0 grams of acrylamide, and 4.0 grams of isopropanol were dissolved in 50.0 grams of deionized water to obtain monomer aqueous solution B;

[0030] Make the initiator aqueous solution C of mass concentration 5% with 3.6 grams of ammonium persulfate;

[0031] 2) Add 6.0 grams of allyl polyether APEG-700 and 15.0 grams of deionized water into the reactor equipped with a stirrer and a reflux condenser, stir and raise the temperature to 75-80°C, and add dropwise within 2.5-3.0 hours Step 1...

Embodiment 3

[0033] A kind of preparation method of amphoteric acrylic resin leather tanning agent comprises the following steps:

[0034] 1) Dissolve 6.0 grams of acrylic acid and 6.0 grams of methacrylic acid in 55.8 grams of deionized water, stir at 10-20 ° C, add 29.1 grams of monoethanolamine aqueous solution with a mass concentration of 30% dropwise within 30 minutes, and after the addition is completed, in 10 React at ~20°C for 15 minutes to obtain monomer aqueous solution A;

[0035] 18.0 grams of dimethylaminoethyl acrylate, 12.0 grams of acrylamide, and 5.0 grams of ethylene glycol were dissolved in 50.0 grams of deionized water to obtain monomer aqueous solution B;

[0036] Make the initiator aqueous solution C of mass concentration 5% with 1.8 gram of ammonium persulfate;

[0037] 2) Add 18.0 grams of allyl polyether APEG-1000 and 40.0 grams of deionized water into the reactor equipped with a stirrer and a reflux condenser, stir and raise the temperature to 75-80°C, and add dr...

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Abstract

The invention discloses amphiprotic acrylic resin leather tanning agent with an effective constituent structure which is as shown in the specification. The preparation method comprises the following steps of: dissolving acrylic acid and methyl acrylic acid in deionized water, stirring, dropwise adding aqueous alkali to obtain a monomer aqueous solution A; dissolving (methyl) dimethylaminoethyl ester acrylate, acrylic amide and a chain transfer agent in deionized water to obtain a monomer aqueous solution B; preparing an initiator aqueous solution C by using ammonium sulfate; adding allyl polyether (APEG) and deionized water to a reactor, stirring and heating up, simultaneously dropwise adding the monomer aqueous solution A, the monomer aqueous solution B and the initiator aqueous solution C, further reacting after the three are simultaneously added, and cooling to obtain amphiprotic acrylic resin leather tanning agent. In addition to the filling and re-tanning functions, the amphiprotic acrylic resin leather tanning agent disclosed by the invention further can be used for pretanning before chrome tanning, so that the usage amount of the chrome tanning agent is reduced, a color shading phenomenon can be avoided, and the absorption of dye and fatting agent is improved.

Description

technical field [0001] The invention belongs to the technical field of leather chemical synthesis, and in particular relates to an amphoteric acrylic resin leather tanning agent. Background technique [0002] In the tanning industry, acrylic resins can be used in the retanning process of chrome tanned leather. This kind of acrylic resin is made of acrylic acid and its derivatives, acrylamide and other strongly hydrophilic vinyl monomers as main raw materials, and is prepared through free radical copolymerization. The coordination combination of trivalent chromium salt has good filling and astringent properties, which can improve the strength of crust leather, reduce the position difference of crust leather, and increase the yield of leather. [0003] The traditional acrylic resin retanning agent mainly relies on the ionization of its carboxyl group to maintain its water solubility and stability in use. Generally, it is prone to precipitation and cannot be used under strong ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/22
Inventor 强西怀薛强张辉
Owner SHAANXI UNIV OF SCI & TECH
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