Analysis of Factors Influencing the Drying Speed of Two-component Acrylic Polyurethane Coatings

MA Xiao-yang[1];LIANG Wei-jian[1];LI Jia-qiang[1];TANG Han-liang[1]

Modern Paint & Finishing ›› 2023, Vol. 26 ›› Issue (3) : 17-20.

PDF(3443 KB)
PDF(3443 KB)
Modern Paint & Finishing ›› 2023, Vol. 26 ›› Issue (3) : 17-20.

Analysis of Factors Influencing the Drying Speed of Two-component Acrylic Polyurethane Coatings

  • MA Xiao-yang[1];LIANG Wei-jian[1];LI Jia-qiang[1];TANG Han-liang[1]
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Abstract

The development of pendulum hardness of the acrylic polyurethane coating during the curing process was analyzed,and the result demonstrated that the drying speed of the coating was mainly determined by the initial hardness and the hardness increasing rate of the coating.The initial hardness of the coating can be estimated by the Fox equation.It depends on the glass transition temperature and amount of the resin and curing agent.The hardness growth rate can be described by the Arrhenius equation,which is related to the activation energy,the collision factor and the reaction temperature of the curing reaction.Through this principle,the factors that affect the drying speed of the coating were systematically analyzed,which pointed out the direction for the development of low-temperature fast-curing polyurethane coatings.

Key words

acrylic polyurethane coating;drying speed;initial hardness;hardness growth rate;low temperature fast curing

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MA Xiao-yang[1];LIANG Wei-jian[1];LI Jia-qiang[1];TANG Han-liang[1]. Analysis of Factors Influencing the Drying Speed of Two-component Acrylic Polyurethane Coatings[J]. Modern Paint & Finishing. 2023, 26(3): 17-20
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