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中南大学学报(英文版)

Journal of Central South University

Vol. 8    No. 3    September 2001

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Synthesis of lanthanum tris (mono-i-octyl phthalate)
and its thermal stability for polyvinyl chloride
LIUYou-nian, LIUYan, ZENG Dong-ming, SHUWan-gen

College of Chemistry&Chemical Engineering, Central SouthUniversity, Changsha 410083, China

Abstract:A novel type of thermal stabilizer—lanthanumtris (mono-i-octyl phthalate) (LTMP) was synthesized by double-decomposition reaction of sodium mono-i-octyl phthalate with lanthanum chloride at 60℃. Sodiummono-i-octyl phthalate was prepared by sodium hydrate and mono-i-octyl phthalate prepared by reaction of isooctyl alcohol and phthalic anhydride in the presence of sulfuric acid catalyst at 110℃. The yield of lanthanum tris (mono-i-octyl phthalate) is about 84.5%. Its thermal stabilitieswere measured by heat-ageing oven testwhen incorporated intoPVC. The experimental results showthatthe heatstabilitytime is about40min at 190℃when adding 3phr (per hundred resin) to PVC. The thermal stability of this product is better than that of Ca-Zn complex and basic lead salt stabilizers, and equal to that of dibutyltin dilaurate.

 

Key words: thermal stabilizer; lanthanum salt; synthesis; polyvinyl chloride

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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