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A kind of polymer fatliquoring agent with amphiphilic structure and preparation method thereof

A technology of polymer and fatliquor, applied in the field of polymer fatliquor with amphiphilic structure and preparation thereof, can solve the problems of low maleic ester copolymerization activity, large residual amount of intermediate, poor application performance and the like , to achieve the effect of reducing COD content, strong binding ability and many binding groups

Inactive Publication Date: 2018-01-09
WENZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the copolymerization activity of maleic acid ester is very low. When it is copolymerized with hydrophilic monomers such as acrylic acid or methacrylic acid, the residual amount of intermediates is large, the composition and distribution of polymer products are very different, and the application performance is not good.
When styrene, vinyl acetate and other strong hydrophobic monomers are used to copolymerize with maleic acid, the copolymerization effect is better, but the polymerization process requires the use of organic solvents, which does not meet environmental protection requirements, and the performance of the product is not good enough to meet Requirements for tannery fatliquoring process

Method used

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  • A kind of polymer fatliquoring agent with amphiphilic structure and preparation method thereof
  • A kind of polymer fatliquoring agent with amphiphilic structure and preparation method thereof
  • A kind of polymer fatliquoring agent with amphiphilic structure and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] A preparation method of a polymer fatliquoring agent with an amphiphilic structure, specifically comprising the following steps:

[0026] (1) Add 0.1 mol of 6-polyglycerol and 0.4 mol of stearic acid into the reactor, blow nitrogen gas, raise the temperature to 240°C, and carry out esterification reaction for 3 hours to obtain Intermediate A.

[0027] (2) Add 0.4 mol of maleic anhydride to intermediate A, raise the temperature to 80°C, and perform esterification for 3 hours to obtain intermediate B.

[0028] (3) Lower the temperature of intermediate B to 60°C, adjust the pH to 6.5 with 30% aqueous sodium hydroxide solution, and obtain a polymer fatliquoring agent with an amphiphilic structure after cooling down.

Embodiment 2

[0030] A preparation method of a polymer fatliquoring agent with an amphiphilic structure, specifically comprising the following steps:

[0031] (1) Add 0.1 mol of 10-polyglycerol and 0.6 mol of stearic acid into the reactor, blow nitrogen gas, raise the temperature to 240°C, and carry out esterification reaction for 3 hours to obtain Intermediate A.

[0032] (2) Add 0.6 mol of maleic anhydride to intermediate A, raise the temperature to 80°C, and carry out esterification reaction for 3 hours to obtain intermediate B.

[0033] (3) Lower the temperature of intermediate B to 60°C, adjust the pH to 6.5 with 30% aqueous sodium hydroxide solution, and obtain a polymer fatliquoring agent with an amphiphilic structure after cooling down.

Embodiment 3

[0035] A preparation method of a polymer fatliquoring agent with an amphiphilic structure, specifically comprising the following steps:

[0036] (1) Add 0.1 mol of 20-polyglycerol and 1.1 mol of stearic acid into the reactor, blow nitrogen gas, raise the temperature to 240°C, and carry out esterification reaction for 3 hours to obtain Intermediate A.

[0037] (2) Add 1.1 mol of maleic anhydride to intermediate A, raise the temperature to 80°C, and perform esterification for 3 hours to obtain intermediate B.

[0038] (3) Lower the temperature of intermediate B to 60°C, adjust the pH to 6.5 with 30% aqueous sodium hydroxide solution, and obtain a polymer fatliquoring agent with an amphiphilic structure after cooling down.

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Abstract

The invention discloses a polymer fatliquoring agent with an amphiphilic structure and a preparation method thereof, specifically comprising the following steps: an intermediate A containing an active hydroxyl group is prepared by esterifying polyglycerol and a long-chain fatty acid, and the intermediate A and the The acid anhydride is further esterified to obtain an intermediate B containing a hydrophilic carboxyl group, and the pH of the intermediate B is adjusted to 6.5-7.5 to obtain a polymer fatliquoring agent. The synthesis process of the polymer fatliquoring agent of the invention is simple and environment-friendly, no organic solvent is used, and no toxic and harmful substances are produced during the synthesis process. The polymer fatliquoring agent has good fatliquoring effect, filling performance and organic solvent extraction resistance, and simultaneously reduces the COD content of fatliquoring waste liquid.

Description

technical field [0001] The invention belongs to the field of leather chemical preparation, and in particular relates to a polymer fatliquoring agent with an amphiphilic structure and a preparation method thereof. Background technique [0002] Fatliquor is one of the most used chemicals in the tanning process. The traditional fatliquor is mainly a modified product of small molecule natural animal and vegetable oils, its function is to lubricate the leather fiber and give the leather a soft and comfortable feel. Polymer fatliquor is a multi-functional leather chemical. In its molecular structure, it has both long-chain alkanes that can lubricate leather fibers and low-molecular-weight polymers that contain hydrophilic groups such as carboxyl groups. This structure makes it lubricate fibers. At the same time, it has the filling function. Compared with low molecular weight fatliquors, polymer fatliquors have the following characteristics: (1) Combine the functions of retanning...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/48C07C67/10C07C69/40C14C9/02
CPCC07C67/10C07C69/40C08G65/48C14C9/02
Inventor 邹祥龙
Owner WENZHOU UNIV