Preparation method of soft acrylic resin leather retanning agent

A technology of acrylic resin and retanning agent, applied in small raw hide/large raw hide/leather/fur treatment, small raw hide/large raw hide/leather hide/fur chemical treatment, animal husbandry, etc., can solve the problem of leather fatliquoring and retanning agent Rare and other problems, to achieve the effect of simplifying the production route, good permeability, and reducing production costs

Active Publication Date: 2013-08-21
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

At present, there are relatively few domestic reports on the preparation of leather fatliquor retanning agents from methyl ricinoleate

Method used

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  • Preparation method of soft acrylic resin leather retanning agent
  • Preparation method of soft acrylic resin leather retanning agent
  • Preparation method of soft acrylic resin leather retanning agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Add 15.0 grams of acrylic acid and 17.9 grams of methacrylic acid into a three-necked flask, slowly add 55.6 grams of 30% sodium hydroxide aqueous solution at 20-30°C, and react for 30 minutes to obtain monomer aqueous solution A1; Acrylamide, 3.0 grams of isopropanol and 40 grams of deionized water were mixed to obtain monomer aqueous solution B1; 3.6 grams of ammonium persulfate was used to prepare initiator aqueous solution C1 with a mass concentration of 5%; set aside.

[0030] 2) Add 31.2 grams of ricinoleic acid methyl ester and 10.3 grams of maleic anhydride to a three-necked flask equipped with a stirrer and a reflux condenser, raise the temperature to 90°C, and react for 4 hours to obtain ricinoleic acid methyl ester maleic acid monoester ;

[0031] 3) Add 4.3 grams of ricinoleic acid methyl ester maleic acid monoester to a four-necked flask equipped with a stirrer, stir, add 1.8 grams of 30% sodium hydroxide aqueous solution dropwise and react at 20-30°C fo...

Embodiment 2

[0033] 1) Add 15.0 grams of acrylic acid and 17.9 grams of methacrylic acid into a three-necked flask, slowly add 55.6 grams of 30% sodium hydroxide aqueous solution at 20-30 °C, and react for 30 minutes to obtain monomer aqueous solution A2; Acrylamide, 6.0 grams of 1,2-propanediol and 40 grams of deionized water were mixed to obtain monomer aqueous solution B2; 2.4 grams of ammonium persulfate was used to prepare initiator aqueous solution C2 with a mass concentration of 5%; standby;

[0034] 2) Add 31.2 grams of ricinoleic acid methyl ester and 10.3 grams of maleic anhydride to a three-necked flask equipped with a stirrer and a reflux condenser, raise the temperature to 110°C, and react for 2.5 hours to obtain ricinoleic acid methyl ester maleic acid monoester ;

[0035] 3) Add 8.7 grams of ricinoleic acid methyl ester maleic acid monoester to a four-neck flask equipped with a stirrer, stir, add 3.7 grams of 30% sodium hydroxide aqueous solution dropwise and react at 20-30°...

Embodiment 3

[0037] 1) Add 8.6 grams of acrylic acid and 10.2 grams of methacrylic acid into a three-necked flask, slowly add 31.9 grams of 30% sodium hydroxide aqueous solution at 20-30°C, and react for 30 minutes to obtain monomer aqueous solution A3; Acrylamide, 3.0 grams of isopropanol and 40 grams of deionized water are mixed to obtain monomer aqueous solution B3; 1.2 grams of ammonium persulfate are used to make the initiator aqueous solution C3 of mass concentration 5%; standby;

[0038] 2) Add 31.2 grams of ricinoleic acid methyl ester and 10.3 grams of maleic anhydride to a three-necked flask equipped with a stirrer and a reflux condenser, raise the temperature to 120°C, and react for 2 hours to obtain ricinoleic acid methyl ester maleic acid monoester ;

[0039] 3) Add 13.0 grams of ricinoleic acid methyl ester maleic acid monoester to a four-neck flask equipped with a stirrer, stir, add 5.5 grams of 30% sodium hydroxide aqueous solution dropwise, and react at 20-30°C for 30 minu...

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Abstract

The invention discloses a soft acrylic resin leather retanning agent and a preparation method thereof. The preparation method comprises the following steps of: firstly performing an esterification reaction based on methyl ricinoleate and maleic anhydride to generate maleic monoester of methyl ricinoleate, and neutralizing with sodium hydroxide to obtain a methyl ricinoleate maleic monoester sodium salt monomer; and then performing free radical polymerization of the methyl ricinoleate maleic monoester sodium salt monomer with a vinyl monomer in a waterborne system to obtain an acrylic resin retanning agent of which the side chain contains the methyl ricinoleate-structure long-chain lipophilic group. The retanning agent disclosed by the invention can be used for filling and retanning crust leather and also can be used for perfectly softening crust leather fiber, is a fat-liquoring type acrylic resin leather retanning agent, and realizes a certain waterproof effect on the chrome tanning crust leather.

Description

technical field [0001] The invention belongs to the field of synthesis of leather chemicals, and in particular relates to a preparation method of a soft acrylic resin leather retanning agent. Background technique [0002] In the leather industry, chrome tanning agents still occupy a dominant position among many tanning agents. Acrylic resin retanning agent is a common material used in the retanning process of chrome tanned leather (wet blue leather). The molecular structure of this kind of resin contains a large number of carboxyl groups, which can be coordinated with the chromium salt in chrome tanned leather. utilization rate. [0003] However, the single-component acrylic resin retanning agent is likely to cause the crust leather to become stiff, make the crust leather fiber brittle, reduce the abrasion resistance of the finished leather, and produce discoloration and the like. This is mainly because the substituents on the molecular chain of the homopolymer formed by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/22C08F220/06C08F222/16C08F220/56
Inventor 丁学斌薛强彭元华
Owner 四川德赛尔新材料科技有限公司
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