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Method for preparing water-resistant and solvent-resistant acrylics coating agent

An acrylic resin, solvent-resistant technology, applied in the chemical industry, to achieve the effect of good leather-like fullness and non-sticky surface

Inactive Publication Date: 2009-10-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there have been many studies on the modification of acrylic resins, but only for the traditional shortcomings of acrylic resins, which are hot-sticky and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1, add water and the emulsifier (sodium lauryl sulfate and macrogol-400) that account for monomer gross mass 3wt% in the there-necked flask, stir 30min when water-bath temperature is 40 ℃, then add normal Ethyl silicate 2wt% (based on the total mass of monomers) and organosilane coupling agent γ-methacryloxypropyl trimethoxysilane 4wt% (based on total monomers mass) reacted for 10min, then added bis Acetone acrylamide 1wt% (in total monomer mass) and 1 / 5 butyl acrylate and methyl methacrylate mixed monomer (the ratio of the substance amount of butyl acrylate to methyl methacrylate is 3: 2), then raise the temperature to 75°C and keep it warm for 30min; then add the remaining mixed monomer and 1wt% ammonium persulfate (based on the total mass of the monomer) aqueous solution at the same time dropwise, after the dropwise addition is completed, raise the temperature to 80°C and keep it warm for 2h ; 1 wt% adipic dihydrazide (based on the total mass of the monome...

Embodiment 2

[0012] Example 2, add water and an emulsifier (sodium lauryl sulfate and polyethylene glycol-400) accounting for 3.5wt% of the total monomer mass in a three-necked flask, stir for 30min when the water bath temperature is 42°C, and then add Tetraethyl orthosilicate 2.5wt% (in total monomer mass) and organosilane coupling agent γ-methacryloxypropyltrimethoxysilane 4wt% (in monomer total mass) reacted for 10min, then Add 1.5wt% of diacetone acrylamide (based on total monomer mass) and 1 / 5 of butyl acrylate and methyl methacrylate mixed monomer (the ratio of the amount of butyl acrylate to methyl methacrylate 3:2), then heated up to 70°C, and kept for 30min; then the remaining mixed monomer and 1.2wt% ammonium persulfate (based on the total mass of the monomer) aqueous solution were added dropwise, and the temperature was raised to 85°C after the dropwise addition was completed. ℃, keep warm for 2 hours. 1.3 wt% adipic dihydrazide (based on the total mass of the monomers) was for...

Embodiment 3

[0013] Example 3, add water and 4wt% emulsifier (sodium lauryl sulfate and polyethylene glycol-400) to the total mass of the monomer in a three-necked flask, stir for 30min when the water bath temperature is 50°C, and then add orthosilicon Ethyl acetate 2.4wt% (based on the total mass of monomers) and organosilane coupling agent γ-methacryloxypropyl trimethoxysilane 4.5wt% (based on the total mass of monomers) reacted for 10min, and then added Diacetone acrylamide 1.2wt% (in total monomer mass) and 1 / 5 of butyl acrylate and methyl methacrylate mixed monomer (the ratio of the amount of butyl acrylate to methyl methacrylate is 3:2), then heated up to 75°C and kept for 30min. Then the remaining mixed monomer and 1.5wt% ammonium persulfate (based on the total mass of the monomer) aqueous solution are added dropwise respectively, and after the dropwise addition, the temperature is raised to 82°C and kept for 2h; the 1.5wt% adipic acid dihydrazide (Based on the total mass of the mo...

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PUM

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Abstract

The invention relates to the technical field of chemical engineering, in particular to a method for preparing water-resistant and solvent-resistant acrylics coating agent used for leather, which comprises the following steps: adding water and emulsifier to a three-neck flask; heating and evenly stirring the mixture in water bath, then adding ethyl orthosilicate and organosilane coupling agent to react for 10min; adding acrylic ester mixed monomer to the mixture and heating to 75 DEG C, retaining the temperature for 30min; then dropping acrylic ester mixed monomer and evocating agent aqueous solution, increasing the temperature to 80-85 DEG C, retaining the temperature for 2h; adding 10wt% of adipate dihydrazides aqueous solution to a reaction system to be evenly stirred; adjusting the pH value to 6.0-7.0 by ammonia, finally obtaining the coating agent of the invention; the raw materials of the acrylics coating agent are easily available, in the process of preparation, inorganic nanometer SiO2 particles are introduced and meanwhile normal temperature self-crosslinking monomer is employed, thus greatly improving water resistance, solvent resistance and transparency of the coating; in addition, the acrylics coating agent is developed which is applied to items using special leather, such as shoes and boots for military use and sofa leather, etc.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a preparation method of an acrylic resin finishing agent for water-resistant and solvent-resistant leather. Background technique [0002] Acrylic resin is the most widely used film-forming substance in leather finishing, and its dosage accounts for more than 70% of the film-forming substance in leather finishing. The acrylic resin leather finishing agent has strong adhesion, and the coating film is smooth and bright. It has strong resistance, stable structure and aging resistance, but it also has the disadvantages of "hot stickiness, cold brittleness", poor solvent resistance, etc., so its application is limited. [0003] In recent years, researchers at home and abroad have modified acrylic resins by adjusting the ratio of monomers and introducing polymers such as organic fluorine and organic silicon to solve the shortcomings of traditional acrylic resins, which are hot...

Claims

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Application Information

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IPC IPC(8): C09D133/06C14C11/00
Inventor 马建中胡静邓维钧王华金郑新建尚世波刘俊莉刘分地
Owner SHAANXI UNIV OF SCI & TECH