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Method for preparing nitro cotton-polyacrylic acid (polyacrylate) emulsion

A technology of polyacrylate emulsion and polyacrylic acid, applied in the field of preparation of nitrocellulose-polyacrylic acid hybrid emulsion, can solve problems such as difficulty in practical application and instability of emulsion system

Active Publication Date: 2006-07-19
广东鸿昌化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are disadvantages in this method: the use of excessive additives will cause the emulsion system to be unstable, and it is difficult to put it into practical application. Therefore, simply using additives to improve the compatibility of nitrocellulose and polyacrylic acid (ester) is not satisfactory. What is required by the application, the biggest expectation at present is to improve the production technology: that is, to solve the problem of homogeneity of the emulsion and latex particles (uniform distribution and compatibility of the two polymers)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A) Dissolve 42.0g nitrocellulose (1 / 16 second), 0.2g benzoyl peroxide, 2.0g cetyl alcohol, 5.0g long-oil cannabis oleic alkyd resin in 39.0g butyl acrylate, 35.0g In a mixed monomer of methyl methacrylate and 1.0 g of acrylic acid.

[0022] B) 0.4g sodium lauryl sulfate, 1.2g nonylphenol polyoxyethylene ether (OP-10), 0.5 allyloxy hydroxypropyl sodium sulfonate (RHODAPEX COPS-I, 64%), 0.8 Dissolve 1 g of ethoxylated alkylphenol ammonium sulfate (RHODAPEX CO-436, 58%), 0.25 g of potassium persulfate in 120.0 g of deionized water, stir well, add the monomer solution in step A, and ultrasonically pre-emulsify stand-by.

[0023] C) In a reaction flask equipped with a thermometer, a stirrer, a reflux condenser and a dropping funnel, 0.4g sodium lauryl sulfate, 1.0g nonylphenol polyoxyethylene ether (OP-10), 0.6g Add ethoxylated alkylphenol ammonium sulfate (RHODAPEXCO-634, 58%), 0.3g of potassium persulfate into 50g of deionized water, stir evenly, heat up to 80°C after ni...

Embodiment 2

[0025] A) 36.0g nitrocellulose (1 / 16 second), 2.0g cetyl alcohol and 11.0g short oil soy acid alkyd resin, 0.35g azobisisobutyronitrile are dissolved in 36.0g butyl acrylate, 20.0g methacrylic acid In the mixed monomer of methyl ester, 16.0g styrene, 1.0g methacrylic acid.

[0026] B) Dissolve 2.0g nonylphenol polyoxyethylene ether (IGEPAL CO-897, 65%), 1.5g ethoxylated alkylphenol ammonium sulfate (RHODAPEX CO-436, 58%), 0.25g potassium persulfate In 120.0g deionized water, after stirring evenly, add the monomer solution in step A, and pre-emulsify with a pre-emulsifier before use.

[0027] C) In a reaction flask equipped with a thermometer, a stirrer, a reflux condenser and a dropping funnel, 1.8 g of nonylphenol polyoxyethylene ether (IGEPAL CO-897, 65%), 1.5 g of ethoxylated alkanes Add ammonium phenol sulfate (RHODAPEX CO-634, 58%), 0.20 g of potassium persulfate into 50 g of deionized water, stir evenly, heat up to 80° C. after 20 minutes with nitrogen gas, and start to...

Embodiment 3

[0029]A) Dissolve 40.0g nitrocellulose (1 / 4 second), 0.1g azobisisobutyronitrile, 2.8g long oil tung oil alkyd resin in 36.0g butyl acrylate, 46.5g methyl methacrylate, 1.2 g in the mixed monomer of methacrylic acid.

[0030] B) 0.5g sodium lauryl sulfate, 1.4g nonylphenol polyoxyethylene ether (OP-10), 0.8g ethoxylated alkylphenol ammonium sulfate (RHODAPEX CO-436, 58%), 0.28 Dissolve 1 g of potassium persulfate in 120.0 g of deionized water, stir evenly, add the monomer solution in step A, ultrasonically pre-emulsify and set aside.

[0031] C) In a reaction flask equipped with a thermometer, a stirrer, a reflux condenser and a dropping funnel, 0.5g sodium dodecyl sulfate, 0.6g nonylphenol polyoxyethylene ether (OP-10), 0.6g Add ethoxylated alkylphenol ammonium sulfate (RHODAPEXCO-634, 58%), 0.3g of potassium persulfate into 50g of deionized water, stir evenly, heat up to 80°C after nitrogen gas for 20 minutes, and start adding the pre-prepared solution prepared in step B dr...

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Abstract

The present invention relates to the preparation process of hybrid nitrocellulose-polyacrylate emulsion. Nitrocellulose, extending resin, oil-soluble initiator and assistant are first dissolved in acrylate monomer; the solution together with emulsifier and water soluble initiator is then dispersed in water and pre-emulsified; and finally the pre-emulsion is dropped into deionized water with emulsifier and water soluble initiator dissolved to produce polymerization forming hybrid nitrocellulose-polyacrylate emulsion. Thus prepared hybrid nitrocellulose-polyacrylate emulsion is superior to alone polyacrylate emulsion and nitrocellulose paint in the hardness, brightness and chemical resistance of the coating, and may be used as coating component for products of metal, wood, leather, plastic, etc. and adhesive component.

Description

technical field [0001] The invention relates to a preparation method of nitrocellulose-polyacrylic acid (ester) hybrid emulsion. Background technique [0002] At present, saving energy, developing resources and reducing pollution have become the top priority of industrial development. It is imperative to replace organic solvent-based paints with water-emulsion paints. But today's water-emulsion paint has many shortcomings, which limit its comprehensive promotion and application. In order to fundamentally improve the film-forming condition and film performance of water-emulsion coatings, it is not possible to simply compound (physically blend) polymer emulsions with different chemical compositions. The most effective method should be to synthesize polymers with special functional groups. polymer aqueous emulsion, or prepare an aqueous emulsion with a composition similar to that of the existing aqueous emulsion but with a special morphology and structure of latex particles (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F212/08C08F2/44C08F2/24
Inventor 王俊卿曾汉民蔡国衡洪星
Owner 广东鸿昌化工有限公司