| QIU Peng.Effect of Functional Monomer on Scrubbing Resistance of Elastic Exterior Wall Latex Paint[J],45(5):123-127 |
| Effect of Functional Monomer on Scrubbing Resistance of Elastic Exterior Wall Latex Paint |
| Received:January 09, 2016 Revised:May 20, 2016 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2016.05.019 |
| KeyWord:elastic exterior wall latex paint scrubbing resistance functional monomer adding method |
| Author | Institution |
| QIU Peng |
CNOOC Huizhou Refining & Petrochemicals Company, Huizhou , China |
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| Abstract: |
| Objective To improve the scrubbing resistance of elastic exterior wall latex paint. Methods In this paper, acrylic emulsion was modified with organic silicon monomer A-171, AAEM (Acetoacetoxy ethylmethacrylate), GMA( Glycidyl methacrylate) and TMPTMA (Trimethylol propane trimethacrylate) using different adding methods respectively, and a series of samples were formulated as exterior wall latex paint. Scrubbing resistance and other properties were tested to evaluate the emulsion and latex paint. Results The film forming properties were reduced and the scrubbing resistance cycle number was kept in range of 820~830 with increasing amount of A-171 monomer. When AAEM addition was greater than 0.5%, the scrubbing resistance cycle number was higher than 1000; when AAEM addition was greater than 1.5% and added after 2.5 h, the increment of apparent viscosity of acrylic emulsion during standing process was greater than 1000 mPa·s; the apparent viscosity of acrylic emulsion was 1600 mPa·s and the scrubbing resistance times was 1700 when AAEM addition was 1.0% and added after 2.5 h. When GMA addition was greater than 1.0%, the scrubbing resistance cycle number was higher than 900; when GMA addition was greater than 1.5% and added after 2.5 h, the average gel content of acrylic emulsion was greater than 0.10%; when GMA addition was 1.0% and added after 2.5 h, the average gel content of acrylic emulsion was 0.06% and the scrubbing resistance cycle number of the coating was 920. The scrubbing resistance cycle number of the coating was higher than 1000 when TMPTMA addition was greater than 1.5%. Conclusion The addition of A-171 was not helpful for scrubbing resistance. The cycle number of scrubbing resistance became higher with addition of AAEM and GMA respectively and addition at later stage was better than addition at the beginning. The addition of TMPTMA could improve the scrubbing resistance. The acrylic emulsion with AAEM exhibited the best comprehensive properties in coating scrubbing resistance, apparent viscosity of acrylic emulsion and the increment of apparent viscosity during standing process. |
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