Substituted indenyl metal titanium compound and its preparation method and use

Abstract

A substituted indenyl metal titanium compound is prepared through reaction of relative alcohol solution with alkyllithium or Grignard reagent, adding relative substituted indenyl titanium trichloride solution, reaction, filter, concentrating and crystallizing. It has high catalytic activity to the syndiotactive polymerization of p-styrene.

Description

technical field

[0001] The invention relates to a substituted indenyl metal titanium compound and a preparation method and use thereof. Background technique

[0002] Atactic Polystyrene (aPS), obtained by free radical polymerization of styrene, has the advantages of hardness, transparency, insulation, and easy processing, and has been widely used in packaging, construction, medicine, electronics, automobiles, and daily necessities and other industries. However, due to the randomness of the structure, its softening temperature is about 100°C, which makes it brittle and poor in heat resistance and chemical corrosion resistance.

[0003] In 1955, Natta et al. used TiCl 4 / AlEt 3 The catalytic system obtained isotactic polystyrene (isotactic Polystyrene, iPS), with a melting point of 240°C and high crystallinity, but its crystallization rate was too slow to achieve industrialization.

[0004] Recently, Ishihara et al obtained syndiotactic polyst...

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