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http://dx.doi.org/10.12925/jkocs.2004.21.1.8

Preparation and Physical Properties of PU Flame-Retardant Coatings Using Benzoic Acid Modified Polyester Containing Phosphorus and HDI-Trimer  

Lee, Ae-Ri (Department of Chemical Engineering, Myongji University)
You, Hyuk-Jae (Department of Chemical Engineering, Myongji University)
Chung, Dong-Jin (Department of Chemical Engineering, Myongji University)
Hahm, Hyun-Sik (Department of Chemical Engineering, Myongji University)
Park, Hong-Soo (Department of Chemical Engineering, Myongji University)
Publication Information
Journal of the Korean Applied Science and Technology / v.21, no.1, 2004 , pp. 62-68 More about this Journal
Abstract
PU flame-retardant coatings (APHD) containing phosphorous were prepared by blending of hexamethylene diisocyanate-trimer, white pigment, dispersing agent, flowing agent, and previously prepared benzoic acid modified polyester (APTB) that contains phosphorous. Physical properties of the prepared APHD were examined. With the introduction of BZA (contained in APTB), the film viscosity and film hardness of APHD decreased. With the introduction of caprolactone group, the flexibility, impact resistance, accelerated weathering resistance of APTBs increased. Flame retardancy of the coatings was tested. In a vertical burning method, APHD shows 210${\sim}$313 seconds, and in a $45^{\circ}$ Meckel burner method, shows 1.3${\sim}$4.0$cm^2$ of char length, which indicates that the coatings are good flame-retardant coatings. Moreover, the amount of afterglow and flame retardancy of the coatings are decreased with increasing BZA content.
Keywords
benzoic acid; modified polyester; hexamethylene diisocyanaie-trimer; flame retardancy;
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