Polyolefin elastomer and preparation method thereof

A polyolefin elastomer, alpha olefin technology, applied in the field of polyolefin elastomer and its preparation, can solve the problems of time-consuming, complicated operation, low efficiency and the like

Active Publication Date: 2019-10-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, EP1472295B1 prepares an elastomer with high Mooney viscosity in one reactor, and an elastomer with low Mooney viscosity in another reactor, and then mixes the two to obtain a polymer with both processability and physical and mechanical properties. Olefin elastomers; however, such methods are cumbersome, time-consuming, and inefficient

Method used

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  • Polyolefin elastomer and preparation method thereof
  • Polyolefin elastomer and preparation method thereof
  • Polyolefin elastomer and preparation method thereof

Examples

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preparation example Construction

[0022] One aspect of the present invention provides a method for preparing a polyolefin elastomer, the molecular weight of the polyolefin elastomer has a bimodal distribution, the method comprises: in an organic solvent, in the presence of a catalyst and hydrogen, ethylene, alpha olefin and optionally polymerizing a cyclic olefin;

[0023] Wherein, the catalyst contains a main catalyst and an activator, and the activator includes one or more of aluminum-containing compounds and optionally contains an organoboron compound;

[0024] The main catalyst is one or more of the early transition metal compounds represented by formula (1) or their crystals;

[0025] Formula 1)

[0026] Among them, R 1 , R 2 , R 3 and R 4 each independently selected from H, C 1-20 Hydrocarbyl, C 1-20 alkoxy and halogen;

[0027] R 1 and R 2 each independently selected from H, C 1-4 Hydrocarbyl and substituted or unsubstituted C 6-12 The aryl, the substituted C 6-12 The substituent on the a...

Embodiment 1

[0261] This example is used to illustrate the early transition metal compound and its preparation method, intermediate and single crystal of the present invention.

[0262]

[0263] Prepare according to the above reaction formula, specifically:

[0264] (1) Diphenyl ether (0.02mol) was diluted in hexane (50mL), and at -78°C, a hexane solution of n-BuLi (42mmol) was added dropwise (completed within about 5min), reacted for 1h, and then Warm up to room temperature (about 25°C), and continue stirring for 16h;

[0265] (2) Then add 15 mL of diphenylphosphine chloride (42 mmol) in n-hexane solution dropwise to the reaction system of step (1) in an ice-water bath (complete addition within about 5 min), and then continue at room temperature (about 25 ° C) ) under stirring reaction for 16h; the solvent was removed by rotary evaporation to obtain a light yellow viscous oil, which was washed with acetone and dried in vacuo to obtain 9.4g white powder, which was the compound shown in...

Embodiment 2

[0270] This example is used to illustrate the early transition metal compound of the present invention and its preparation method and intermediate.

[0271] According to the method described in Example 1, the difference is that in step (4): the compound (1 mmol) shown in formula (2-1) was dissolved in 10 mL of toluene, and 5 mL of TiCl was added dropwise under magnetic stirring 4 (2mmol) toluene solution, then heated to 110 ° C and refluxed for 12h; after the reaction was completed, the solvent toluene was removed by rotary evaporation under reduced pressure, and the crude product was washed 3 times with pentane, and vacuum-dried to obtain the product. 1 The obtained compound was identified by H NMR as formula (1-Ti-2).

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Abstract

The invention relates to the field of olefin polymerization, in particular to a polyolefin elastomer and a preparation method thereof. The molecular weight of the polyolefin elastomer is distributed as a bimodal structure, and the preparation method includes the following steps that in an organic solvent, in the presence of a catalyst and hydrogen, the polymerization reaction of ethylene, [alpha]olefin and optional cycloolefin is conducted; the catalyst contains a main catalyst and an activator, and the activator includes one or more optional compounds containing organic boron; and the main catalyst is one or more pre-transition metal compounds or crystals thereof shown in a formula (1). According to the polyolefin elastomer and the preparation method thereof, the pre-transition metal compounds or the crystals thereof are adopted to be the main catalyst for polymerization, and the polyolefin elastomer with obvious bimodal distribution is prepared by using a catalyst system in a singlereactor.

Description

technical field [0001] The invention relates to the field of olefin polymerization, in particular to a polyolefin elastomer and a preparation method thereof. Background technique [0002] Polyolefin elastomer is a widely used polymer material, usually a copolymer of ethylene and α-olefin, which can be used as film and wire and cable sheathing. As an elastomer, it is the most widely used in automotive applications. It can be used as a resin toughening material for automotive parts, and can be used as sealing strips, hose tapes, etc. [0003] Conventional ethylene, propylene copolymers (EP Elastomer), or ethylene, propylene and a small amount of non-conjugated diene copolymers (EPDM) are polyolefin elastomers. Generally, high molecular weight olefin elastomer endows materials with good mechanical properties. For high molecular weight EPDM, its corresponding Mooney viscosity is usually very high (for example, more than 100), which brings great pressure to its later processing,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/16C08F210/02C08F232/08C08F4/642
CPCC08F210/16C08F210/02C08F232/08C08F4/642
Inventor 陈建军王铁石唐正伟徐一兵徐林冯增国
Owner CHINA PETROLEUM & CHEM CORP
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