Fluoro resin/acrylic ester mixed emulsion and method for preparation thereof

The technology of acrylate and alkyl acrylate is applied in the field of fluororesin/acrylate hybrid emulsion and its preparation, which can solve the problems of cold, brittle and hot sticking of adhesive film, high cost, complicated process, etc. The effect of improved pollution resistance and simple preparation process

Inactive Publication Date: 2005-08-17
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are still problems in acrylic latex coatings, such as poor water resistance and moisture permeability, and the film is cold, brittle and hot-sticky. Compared with silicone coatings and fluororesin (FP) coatings, its weather resistance is still relatively large. gap
[0013] Throughout the literature and patents at home and abroad, most of them are fluorine-containing acrylate resins obtained by copolymerizing fluorine monomers and acrylate monomers. However, the process is usually more complex, and the requirements for equipment and process conditions are relatively strict, and the cost is high, and the selection of fluorine monomers is also relatively difficult. The modification of fluororesin emulsions is largely a matter of developing new fluorine-containing resins Fluorine monomers and new processes to reduce raw material costs or production conditions, and improve the compatibility of the two resins

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 4g ML26-40 fluororubber is dissolved in the mixed monomer of 1g acrylic acid, 25g butyl acrylate, 20g methyl methacrylate, 0.6g sodium lauryl sulfate, 0.7g nonylphenol polyoxyethylene ether ( OP-10), 0.7g perfluorooctanoic acid ammonium, 0.2g sodium bicarbonate are dissolved in 140g water, then above-mentioned mixed monomer is added wherein, high-speed mechanical disperses 15 minutes to make pre-emulsion, this pre-emulsion of 10% is added into flask and heated to 75°C, dissolve 0.3g of ammonium persulfate in 10g of water, add 2.5g to the system, after half an hour of reaction, add the remaining pre-emulsion and 5g of ammonium persulfate solution dropwise into the reaction system within 2 hours, raise the temperature to 80°C , add the remaining 2.5g of ammonium persulfate solution, keep it warm for half an hour, and finally raise the temperature to 85°C for aging for half an hour, cool down to below 50°C, and adjust the pH value to 8-9. Then the water resistance and poll...

Embodiment 2

[0035] will be added with 0.5gNaHCO 3 , 0.4g ammonium persulfate, 1gFSO emulsifier, 2g succinic acid polyoxyethylene nonylphenol ether monoester sodium sulfonate (MS-1) emulsifier, 3g nonylphenol polyoxyethylene ether (OP-10) emulsifier , 140g of water and 2.88g of acrylic acid, 3.84g of N-methylol acrylamide, 38.4g of methyl methacrylate, 50.88g of butyl acrylate to prepare a pre-emulsion, take 20% of this pre-emulsion and add 6.7gML26 -40 fluorine emulsion, swell at 60°C for 1 hour, heat up to 75°C, react for half an hour, and use this as the seed of the composite emulsion, then gradually add the remaining pre-emulsion to the system, and add it after the pre-emulsion has been added dropwise 2mL of 20% ammonium persulfate solution, heat up to 80°C and keep warm for half an hour, and finally heat up and mature for 30 minutes, after cooling, add ammonia water to adjust the pH value to 8-9. Then the water resistance and anti-pollution properties of the emulsion after film forma...

Embodiment 3

[0038] will be added with 0.5gNaHCO 3 , 0.4g ammonium persulfate, 1gFSO emulsifier, 2g succinic acid polyoxyethylene nonylphenol ether monoester sodium sulfonate (MS-1) emulsifier, 3g nonylphenol polyoxyethylene ether (OP-10) emulsifier , 108g of water and 2.76g of acrylic acid, 3.68g of N-methylol acrylamide, 36.8g of methyl methacrylate, 48.76g of butyl acrylate mixed monomers to prepare a pre-emulsion, take 20% of this pre-emulsion and add 40g of FR301 fluorine Emulsion, swell at 60°C for 1 hour, heat up to 75°C, react for half an hour, and use this as the seed of the composite emulsion, and then gradually add the remaining pre-emulsion to the system, and add 2ml of 20% super emulsion after the pre-emulsion is added dropwise. For ammonium sulfate solution, raise the temperature to 80°C and keep it warm for half an hour. Finally, raise the temperature and mature for 30 minutes. After cooling, add ammonia water to adjust the pH value to 8-9. Then the water resistance and ant...

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PUM

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Abstract

The present invention discloses one kind of mixed fluororesin / acrylate emulsion and its preparation process, and solves the technological problems in mixing said two kinds of resin. The emulsion of the present invention is prepared with fluororesin 1-20 wt%, C1-C10 alkyl acrlyate 30-60 wt%, C1-C10 methyl alkyl acrlyate 20-40 wt% and cross-linking monomer 1-10 wt%, and through in-situ polymerization or interpenetrating polymerization. The emulsion of the present invention has greatly raised water resistance, ageing resistance and antifouling property, and may be used widely in paint, adhesive, textile assistant and other fields. The present invention has simple preparation process and low cost, and fluororesin adding amount as low as 1-12 wt% may results in obvious effect.

Description

technical field [0001] The invention relates to an emulsion used in the technical fields of coatings, adhesives and textile auxiliaries and a preparation method thereof, more specifically to a fluororesin / acrylate hybrid emulsion and a preparation method thereof. Background technique [0002] Acrylic resin refers to a homopolymer of acrylate or methacrylate or a copolymer with other ethylenic monomers. The main chain of acrylic resin is a pure C-C bond. Oxygen resin, polyurethane resin, etc.) has many advantages. Pure C-C bonds are not easy to decompose, have strong outdoor exposure durability, and are resistant to ultraviolet light. They can maintain luster and color without yellowing for a long time; due to the presence of ester groups, acrylic resin has a strong binding force to pigments and substrates. [0003] With the development of the world's coatings towards high performance and low pollution, acrylic resin coatings are mainly water-based emulsions in practical app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/22C08F259/08
Inventor 陈苏陈莉徐南平
Owner NANJING UNIV OF TECH
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