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Preparation method of starch and sulfomethyl phenol graft copolymer leather synthesis tanning agent

A technology of sulfomethylphenol and graft copolymer is applied in the field of preparation of starch and sulfomethylphenol graft copolymer leather synthetic tanning agent. High shrinkage temperature, good elasticity, soft and plump feel

Inactive Publication Date: 2011-11-16
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The degree of polymerization, chain segment distribution, and functional group distribution of the products obtained by conventional free radical graft polymerization are poorly controlled, and it is difficult to form a synergistic effect when macromolecules interact with skin collagen

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] 1) Preparation of sodium hydroxymethanesulfonate: Add 7 grams of sodium bisulfite, 8.5 grams of sodium sulfite and 2 grams of formaldehyde into 200 grams of distilled water, mix evenly, heat to 60°C for 3 hours, and then distill under reduced pressure after the reaction is completed , after concentration, add 3 times the volume of methanol to the concentrate, and white crystals are precipitated, which are dried at 70°C to obtain sodium hydroxymethanesulfonate;

[0013] 2) Preparation of sulfomethylphenol: Add 2.5 g of sodium hydroxymethanesulfonate and 5.3 g of phenol into 50 g of distilled water and mix, adjust the pH to 9 with 30% sodium hydroxide, and reflux for 1 hour to obtain Sulfomethylphenol solution;

[0014] 3) Preparation of degraded starch: Dissolve 10 grams of cornstarch and 0.1 gram of high-temperature-resistant α-amylase in 60 grams of distilled water, heat up to 50° C. for degradation reaction under stirring, and cool down to room temperature after 40 mi...

Embodiment 2

[0017] 1) Preparation of sodium hydroxymethanesulfonate: Add 7 grams of sodium bisulfite, 8.5 grams of sodium sulfite and 2 grams of formaldehyde into 200 grams of distilled water, mix evenly, heat to 60°C for 3 hours, and then distill under reduced pressure after the reaction is completed , after concentration, add 3 times the volume of methanol to the concentrate, and white crystals are precipitated, which are dried at 70°C to obtain sodium hydroxymethanesulfonate;

[0018] 2) Preparation of sulfomethylphenol: 3.0 g of sodium hydroxymethanesulfonate and 5.3 g of phenol were added to 50 g of distilled water and mixed, and the pH was adjusted to 9 with 30% sodium hydroxide, and refluxed for 1 h to obtain Sulfomethylphenol solution;

[0019] 3) Preparation of degraded starch: Dissolve 10 grams of cornstarch and 0.3 grams of high-temperature-resistant α-amylase in 60 grams of distilled water, heat up to 60° C. for degradation reaction under stirring, and cool down to room temper...

Embodiment 3

[0022] 1) Preparation of sodium hydroxymethanesulfonate: Add 7 grams of sodium bisulfite, 8.5 grams of sodium sulfite and 2 grams of formaldehyde into 200 grams of distilled water, mix evenly, heat to 60°C for 3 hours, and then distill under reduced pressure after the reaction is completed , after concentration, add 3 times the volume of methanol to the concentrate, and white crystals are precipitated, which are dried at 70°C to obtain sodium hydroxymethanesulfonate;

[0023] 2) Preparation of sulfomethylphenol: 3.5 grams of sodium hydroxymethanesulfonate and 5.3 grams of phenol were added to 50 grams of distilled water and mixed, and the pH was adjusted to 9 with 30% sodium hydroxide, and refluxed for 1 hour to obtain Sulfomethylphenol solution;

[0024] 3) Preparation of degraded starch: Dissolve 10 grams of cornstarch and 0.2 grams of high-temperature-resistant α-amylase in 60 grams of distilled water, heat up to 80° C. for degradation reaction under stirring, and cool down...

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PUM

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Abstract

The invention relates to a preparation method of starch and sulfomethyl phenol graft copolymer leather synthesis tanning agent, the method comprises the following steps: reacting sodium bisulfite with sodium sulfite and formaldehyde, to prepare sodium hydroxymethanesulphonate, then performing a sulfomethylation of hydroxymethyl sulfonate and phenol under the alkaline condition, to prepare a sulfomethyl phenol solution, finally, mixing the sulphur methyland phenol solution with enzymatic degradated starch, regulating the pH value of the solution by sodium bicarbonate, performing a graft copolymerization reaction of starch and sulphur methyland phenol under the catalytic effect of horseradish peroxidase, to obtain the starch graft copolymer leather synthesis tanning agent. The obtained product has the advantages of moderate relative molecular mass, good permeability and high absorption, and is a high-molecular tanning agent with no pollution and green performance. The preparation method of the present invention has an unique synthesizing preparation technology, the shrinkage temperature can reach at 78 DEG C when the obtained synthesis tanning agent is taken as a main tanning agent, the thickening rate of the leather can reach at 28% when the obtained synthesis tanning agent is used for retanning, thereby the leather possesses soft handfeel. The agent can be used as the leather tanning agent with green environmental protection performance.

Description

technical field [0001] The invention relates to a preparation method of a leather tanning agent, in particular to a preparation method of a starch and sulfomethylphenol graft copolymer leather syntan. Background technique [0002] Sulfonation has many functions in organic synthesis, the most important is to endow some compounds with water solubility through the sulfonate group in the molecule. According to the different binding points of sulfonating agents, sulfonation can be divided into two sulfonation methods: connecting sulfonate groups on aromatic rings and connecting sulfonate groups on aliphatic carbon atoms. There are two common methods for aromatic compounds to increase water solubility through sulfonate groups. One is to use sulfuric acid (or anhydrous high-concentration SO 3 ) direct sulfonation. Another method is to carry out by sulfomethylation reaction, which is to use sulfite as sulfonating agent, and use the generated methylene as the bridging bond between ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/00C12P19/14C14C3/22
Inventor 吕生华弓瑞
Owner SHAANXI UNIV OF SCI & TECH
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