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http://dx.doi.org/10.12925/jkocs.2003.20.1.8

Preparation of Reactive Flame Retardant Coatings Containing Phosphorus;I. Synthesis of Pyrophosphoric Modified Polyesters  

Chung, Dong-Jin (Department of Chemical Engineering, Myongji University)
Jung, Choong-Ho (Department of Chemical Engineering, Myongji University)
Park, Hong-Soo (Department of Chemical Engineering, Myongji University)
Kim, Tae-Ok (Department of Chemical Engineering, Myongji University)
Park, Shin-Ja (R&D Center, R&C Co. Ltd.)
Publication Information
Journal of the Korean Applied Science and Technology / v.20, no.1, 2003 , pp. 57-63 More about this Journal
Abstract
An intermediate, tetramethylene bis (orthophosphate), was prepared by the esterification of pyrophosphoric acid and l,4-butanediol. Then pyrophosphoric-containing modified polyesters (ATTBs) were synthesized by polycondensation of tetramethylene bis(orthophosphate), trimethylolpropane, adipic acid, and l,4-butanediol. The content of l,4-butanediol was varied from 10 to 20wt% for the reaction. The increase of the amount of l,4-butanediol in the synthesis of ATTBs resulted in increase in average molecular weight and decrease in kinematic viscosity owing to the excellent flowability and reactivity of l,4-butanediol.
Keywords
pyrophosphoric modified polyester; esterification; kinematic viscosity;
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