Comb-shaped amphiphilic modified styrene-maleic anhydride (SMA) tanning agent and preparation method thereof

An amphiphilic, tanning agent technology, applied in animal husbandry, small raw hide/big raw hide/leather skin/fur chemical treatment, application, etc., can solve poor emulsification and dispersion performance, affect retanning and fatliquoring effect, hydrophilic Insufficient softness, excellent retanning and fatliquoring performance, and excellent hydrophilicity can be achieved

Inactive Publication Date: 2011-08-24
四川德赛尔新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The softness of the finished leather after tanning of this product is better. This method improves the disadvantage of hard hand feeling of the leather after SMA retanning, but the product is not hydrophilic, the emulsification and dispersion performance is not good, and the emulsification is relatively difficult, which affects retanning. fatliquoring effect

Method used

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  • Comb-shaped amphiphilic modified styrene-maleic anhydride (SMA) tanning agent and preparation method thereof
  • Comb-shaped amphiphilic modified styrene-maleic anhydride (SMA) tanning agent and preparation method thereof
  • Comb-shaped amphiphilic modified styrene-maleic anhydride (SMA) tanning agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The first step, get the catalyst of the SMA of 202 parts by mass, the fatty alcohol of 139.5 parts by mass, the polyethylene glycol monomethyl ether of 62.5 parts by mass and 2.0 parts by mass, join above-mentioned reactant in In a reactor equipped with a stirrer, a thermometer and a condensing device, add an organic solvent 2.5 times the total amount of reactants, react at 85° C. for 3 hours, and distill off the solvent under reduced pressure to obtain a reaction product. The average relative molecular mass of the SMA is 2000; the fatty alcohol is dodecyl alcohol; the polyethylene glycol monomethyl ether is MPEG-250; the organic solvent is dioxane; the catalyst For p-toluenesulfonic acid.

[0032] In the second step, neutralize with 20% alkaline aqueous solution until the pH of the reaction system is 7.0, and adjust the solid content of the product to 30%. The alkali of the alkaline aqueous solution is NaOH.

Embodiment 2

[0034] The first step, get the catalyst of the SMA of 202 parts by mass, the fatty alcohol of 140 parts by mass, the polyethylene glycol monomethyl ether of 75 parts by mass and 2.1 parts by mass, join above-mentioned reactant in In a reactor equipped with a stirrer, a thermometer and a condensing device, add an organic solvent 2.5 times the total amount of reactants, react at 80° C. for 3.5 hours, and distill off the solvent under reduced pressure to obtain a reaction product. The average relative molecular mass of the SMA is 4000; the fatty alcohol is C 12 ~C 14 Mixed alcohol; the polyethylene glycol monomethyl ether is MPEG-250; the organic solvent is butanone; the catalyst is p-toluenesulfonic acid.

[0035] In the second step, neutralize with 20% alkaline aqueous solution until the pH of the reaction system is 6.5, and adjust the solid content of the product to 25%. The base of the alkaline aqueous solution is ammonia water.

Embodiment 3

[0037] The first step, get the catalyst of the SMA of 202 parts by mass, the fatty alcohol of 107 parts by mass, the polyethylene glycol monomethyl ether of 275 parts by mass and 2.9 parts by mass, join above-mentioned reactant in In a reactor equipped with a stirrer, a thermometer and a condensing device, add an organic solvent 3 times the total amount of reactants, react at 90° C. for 3 hours, and distill off the solvent under reduced pressure to obtain a reaction product. The average relative molecular mass of the SMA is 3000; the fatty alcohol is myristyl alcohol; the polyethylene glycol monomethyl ether is MPEG-550; the organic solvent is DMSO; the catalyst is sulfuric acid .

[0038] In the second step, neutralize with 20% alkaline aqueous solution until the pH of the reaction system is 7.0, and adjust the solid content of the product to 35%. The base of the solution is KOH.

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Abstract

The invention discloses a comb-shaped amphiphilic modified styrene-maleic anhydride (SMA) tanning agent and a preparation method thereof. SMA is subjected to esterification modification by using fatty alcohol and polyethylene glycol monomethyl ether to form the comb-shaped amphiphilic modified SMA tanning agent; and a lipophilic long-chain alkyl group, a hydrophilic ethyoxyl group and a hydrophilic carboxyl group are synchronously introduced into a molecular structure of the tanning agent. Original performance advantages of an SMA tanning agent are kept, and the tanning agent also overcomes the disadvantages of hard handfeel, easiness in color loss, low leveling property, no electrolyte resistance and the like when the using amount of the SMA tanning agent is large in retanning and fatliquoring of tanning. Therefore, the tanning agent is a functional material which integrates retanning, filling and fatliquoring into a whole, can endow finished leather with high elasticity, plump performance and fatliquoring performance, and has broader application prospect in the tanning industry.

Description

technical field [0001] The invention relates to the field of leather chemical production, in particular to a comb-shaped amphiphilic modified SMA tanning agent and a preparation method thereof. Background technique [0002] In 1945, Alfey and Lavin pioneered the study of styrene-maleic anhydride copolymer (SMA). After that, Mayo conducted a systematic study on the styrene-maleic anhydride copolymer system, and believed that the copolymer product of this system was a typical alternating copolymer. So far, more and more people pay attention to the research on the preparation and application of SMA. [0003] In China, Zhang Juxian and others first applied the sodium salt of SMA (SMA tanning agent or KS-1 synthetic tanning agent) to leather making. After tanning, the grain of the crust leather is fine, the pores are clear, the leather body is plump, and the leather yield is high. , has obvious whitening and thickening properties, especially suitable for the production of white...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/22C08F222/08C08F8/14C08G81/02
Inventor 彭先成丁学斌彭元华强西怀
Owner 四川德赛尔新材料科技有限公司
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