Trinuclear organic stannous metal catalyst, as well as preparation method and application thereof

• Main Authors: BAI SHENGDI, HE HONGZHU, CHEN WENWEI, LIU DIANSHENG
• Format: Patent
• Language: Chinese; English
• Published: 12.10.2018
• Subjects: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention provides a trinuclear organic stannous metal catalyst, as well as a preparation method and application thereof. The preparation method of the catalyst comprises the following steps: dehydrogenizing 2 molar weight of aniline with 2 molar weight of n-butyllithium (LiBun) under nitrogen protection; adding 1 molar weight of methyl dichloresilane into the mixture, and adding two molar weight of benzonitrile to obtain lithium salt A; and finally reacting the lithium salt A respectively with 2 molar weight or 1 molar weight of SnCl2 to obtain a methylsilane bridged amidino stannous catalyst B or C. The preparation method is simple, and the materials are simple and easily available, have low price and high yield and can be easily purified. Experiment results indicate that the catalyst B or C has a relatively high catalytic activity for polymerization of isocyanate and epsilon-caprolactone, and can be used as a catalyst for preparing the polyisocyanate and polyepsilon-caprolactonehaving high molecular we