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Emulsion polymerization process for in-situ preparing nano SiO2/acrylate resin composite paint

An acrylic resin, in-situ generation technology, applied in the direction of coating, etc., can solve the problems of poor weather resistance, solvent resistance, cold and brittleness, etc., and achieve the effects of good stability, good hygienic performance, and increased strength

Inactive Publication Date: 2007-06-27
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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. High resistance, stable structure and aging resistance, but there are also disadvantages such as "hot stickiness, cold brittleness", solvent resistance, poor weather resistance, etc., so its application is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: The three-necked flask was heated to 40°C in a water bath, and an emulsifier (the molar ratio of alkylphenol polyoxyethylene ether to sodium lauryl sulfate was 2:1) and deionized water with a molar fraction of 0.5% was added, and the After the emulsification is uniform, add a mole fraction of 0.4% organosilane coupling agent and a mole fraction of 0.07% tetraethyl orthosilicate, and stir at a constant temperature for 10 minutes, then add a mole fraction of 14% butyl acrylate and methyl methacrylate (acrylic acid The molar ratio of butyl ester and methyl methacrylate is 2: 1) 1 / 5 of the total mass of the mixed monomer and 1 / 4 of the mass of potassium persulfate aqueous solution with a mole fraction of 0.07%, the system is heated up to 80°C, and reacted for 30min Then start to drop the remaining monomer and initiator aqueous solution respectively. After the dropwise addition, raise the temperature to 88°C, stir for 2 hours, then lower the temperature to adjust t...

Embodiment 2

[0023] Example 2: Heat the three-necked flask in a water bath to 45°C, add an emulsifier with a molar fraction of 0.5% (the molar ratio of alkyl polyglycosides to sodium lauryl sulfate is 2:1) and deionized water, and wait for the emulsification to be uniform Finally, adding mole fraction is 0.8% organic silane coupling agent and mole fraction 0.1% tetraethyl orthosilicate, after stirring at constant temperature for 10min, adding mole fraction is 14.5% ethyl acrylate and methyl acrylate (ethyl acrylate and The molar ratio of methyl acrylate is 2: 1) 1 / 5 of the total mass of the mixed monomers and 1 / 4 of the mass of the ammonium persulfate aqueous solution with a mole fraction of 0.1%, and the temperature is raised to 82°C, and the remaining monomers are added dropwise after 30 minutes of reaction. body and initiator aqueous solution, after the dropwise addition, the temperature was raised to 86°C, and after stirring for 2 hours, the temperature was lowered to adjust the pH to n...

Embodiment 3

[0024] Example 3: The three-necked flask was heated to 42°C in a water bath, and the emulsifier (the molar ratio of sorbitan monooleate to sodium lauryl sulfate was 2:1) and deionized water was added with a molar fraction of 0.6% , after the emulsification is uniform, adding mole fraction is 0.6% organosilane coupling agent and mole fraction 0.2% orthosilicate ethyl ester, after stirring at constant temperature for 10min, adding mole fraction is 15% butyl acrylate and methyl acrylate ( The molar ratio of butyl acrylate and methyl acrylate is 2: 1) 1 / 5 of the total mass of the mixed monomer and 1 / 4 of the mass of the ammonium persulfate aqueous solution with a mole fraction of 0.15%, the temperature is raised to 81 ° C, and the reaction starts after 30 minutes. Add the remaining monomer and initiator aqueous solution dropwise. After the dropwise addition, raise the temperature to 87°C, stir for 2 hours, then lower the temperature and adjust the pH to neutral to obtain nano-SiO ...

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PUM

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Abstract

The present invention relates to emulsion polymerization process for in-situ preparing SiO2 / acrylate resin composite paint for leather. Acrylate resin is one filming matter widely used for leather. The present invention synthesizes SiO2 / acrylate resin composite paint for leather with ethyl silicate and acrylate monomer and through emulsion polymerization. The SiO2 / acrylate resin composite paint for leather is superior to traditional acrylate resin, and the coated leather has excellent ageing resistance, excellent hand feeling and raised sanitation performance.

Description

Technical field: [0001] The invention relates to an in-situ generation of nano-SiO by emulsion polymerization 2 The invention relates to a preparation method of an acrylic resin composite finishing agent, in particular to a preparation method of a soft acrylic resin leather finishing agent which can be used for leather bottom coating and middle coating. technical background: [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", no solvent resistance, poor weather resistance, etc., so its application is limited. [0003] In recent years, nanomaterials have attracted the attention of scientists all over the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/10C08F2/24C08F2/38C08L33/00C08K3/36C09D133/00
Inventor 马建中胡静张志杰杨明来吕斌张新强杨宗邃
Owner SHAANXI UNIV OF SCI & TECH
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