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Technical method of preparing polynorbornene using beta diketone titanium non cyclopentadienyl catalyst

A technology for diketone titanium nonlocene catalyst and polynorbornene is applied in the field of preparing polynorbornene and can solve the problems of complex preparation process, low activity and poor stability of the pre-transition metal catalyst.

Inactive Publication Date: 2003-12-03
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the above method, the applied pre-transition metal catalyst or preparation process is complicated, the cost is high, or the stability is poor, or the activity is low

Method used

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  • Technical method of preparing polynorbornene using beta diketone titanium non cyclopentadienyl catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 11

[0014] Example 11. Preparation of the catalyst Using Schlenk technology, under the protection of argon, use a syringe to add 0.5mLTiCl to a 250mL three-neck round bottom flask successively 4 (99%) solution, 15 mL of dried toluene. A solution of 0.8586g phenol and 15mL toluene was added dropwise through a constant pressure dropping funnel, and refluxed for 2h after dropping. After cooling, add a solution of 2.0929 g of dibenzoylmethane and 15 mL of toluene dropwise through a constant pressure dropping funnel, and reflux for 4 hours after the dropwise addition. Slowly lower the temperature to obtain crystals, which are catalyst 1. Similarly, use 0.4299g phenol and 3.1311g dibenzoylmethane to obtain catalyst 2; use 1.2988g phenol and 1.0476g dibenzoylmethane to obtain catalyst 3; instead of phenol and dibenzoylmethane, add only 1.0mL Catalyst 4 was obtained from acetylacetone; Catalyst 5 was obtained from 0.8586g phenol and 1.0mL acetylacetone. The structures of these catalyst...

Embodiment 2

[0016] Catalyst 2 was used in the polymerization reaction, and all the other polymerization conditions were the same as in Example 1.

Embodiment 3

[0018] Catalyst 3 was used in the polymerization reaction, and all the other polymerization conditions were the same as in Example 1.

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Abstract

A process for preparing polynorbornene with non-cyclopentadiene beta-diketone titanium catalyst includes, adding beta-diketone titanium as primary catalyst, then adding norbornene monomer solution, further adding toluene or o-dichlorobenzene as solvent for dissolving the catalyst, then further adding methyl aloxyane, triethyl aluminium, or triisobutyl aluminium as secondary catalyst, and reaction at 0-90 deg.C. Its product has high-temp. resistance (more than 400 deg.C) and high-vitrification temp. (300-400 deg.C).

Description

technical field [0001] The invention relates to a process for preparing polynorbornene by using a beta-diketone titanium non-metallocene catalyst. Background technique [0002] Norbornene, that is, bicyclo[2.2.1]hept-2-ene, has a complex polymerization mechanism, and there are three types: ring-opening metathesis polymerization, vinyl addition polymerization and free radical or cationic polymerization mechanism. The ring-opening metathesis polymer of norbornene can absorb 5-10 times its weight of oil, which can be used for recovery of oil spills; the elastomer after oil absorption can be used as a sound insulation layer; the sulfide has excellent damping properties. Its vinyl addition polymer has good thermal stability, low moisture absorption, good air permeability and high refractive index. Its free radical or cationic polymer is the product of cationic rearrangement after double bond addition, generally obtained as oligomer, less research. Therefore, the preparation fie...

Claims

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Application Information

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IPC IPC(8): C08F4/642C08F4/76C08F132/04C08F136/08C08G61/08
Inventor 胡友良宓霞阎卫东马志郭存悦柯毓才周鼐
Owner INST OF CHEM CHINESE ACAD OF SCI
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