Process for production of cross copolymers, cross copolymers obtained by the process, and use thereof

A technology of cross-copolymer and manufacturing method, applied in the field of specific cross-copolymer, can solve the problems of reduced transparency, loss of flexibility, opacity, etc., and achieve the effects of excellent compatibility, excellent flexibility and excellent transparency

Inactive Publication Date: 2009-06-10
DENKA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cross copolymers described in the Examples all have polyethylene crystallinity and crystal melting point, and have a large loss of flexibility compared with ethylene-styrene copolymers.
In addition, compared with ethylene-styrene copolymer, the transparency is also greatly reduced, and it is basically opaque

Method used

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  • Process for production of cross copolymers, cross copolymers obtained by the process, and use thereof
  • Process for production of cross copolymers, cross copolymers obtained by the process, and use thereof
  • Process for production of cross copolymers, cross copolymers obtained by the process, and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 12

[0222] In Example 12, as a catalyst (transition metal compound), rac-dimethylmethylene(4,5-benzo-1-indenyl)(1-indenyl)zirconium dichloride (Formula 8) was used .

[0223] Formula 8

Embodiment 1

[0225]

[0226] As a catalyst, rac-dimethylmethylenebis(4,5-benzo-1-indenyl)zirconium dichloride was used and carried out as follows.

[0227] Polymerization was carried out using an autoclave having a capacity of 10 L and equipped with a stirrer and a jacket for heating and cooling.

[0228] 4200 ml of cyclohexane, 600 ml of styrene, and m-divinylbenzene (7 mmol as m-divinylbenzene) manufactured by ASAHI KASEI FINECHEM Co., Ltd. were charged, and heated and stirred at an internal temperature of 70°C. Bubble about 200L of dry nitrogen to remove moisture in the system and the polymerization liquid. Then, 8.4 mmol of triisobutylaluminum and 12.6 mmol of methylaluminoxane (manufactured by TOSOH AKZO, PMAO-3A) (manufactured by TOSOH AKZO Co., Ltd., PMAO-3A) (referred to as MAO in the table) were added based on Al, and ethylene was immediately introduced. MPa(2.0Kg / cm 2G) After stabilizing under the pressure, add rac-dimethylmethylene bis (4,5-benzo-1-indenyl) zirconium dichlor...

Embodiment 2

[0232] Polymerization was performed under the conditions described in Table 1 in the same procedure as in Example 1 using toluene as a solvent.

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Abstract

To provide a novel cross copolymer and resin composition which are improved in heat resistance and compatibility over conventional ethylene/aromatic vinyl compound copolymers and which have low crystallinity, are excellent in softness, transparency and compatibility and show mechanical properties similar to soft vinyl chloride resins, as compared with conventional cross copolymers. A process for producing a cross copolymer, which comprises a coordination polymerization step and a subsequent anionic polymerization step, wherein in the coordination polymerization step, copolymerization of an olefin monomer, an aromatic vinyl compound monomer and an aromatic polyene is carried out by using a single-site coordination polymerization catalyst to synthesize an olefin/aromatic vinyl compound/aromatic polyene copolymer, and then, in the anionic polymerization step, polymerization is carried out in the coexistence of such an olefin/aromatic vinyl compound/aromatic polyene copolymer and an anionic polymerizable vinyl compound monomer by using an anionic polymerization initiator.

Description

technical field [0001] The present invention relates to a specific cross copolymer (cross copolymer) excellent in flexibility, or excellent in flexibility and transparency, its composition and use. Background technique [0002] Ethylene-styrene (aromatic vinyl compound) copolymers are known (Patent Document 1). This copolymer exhibits the properties of an elastomer, and also exhibits mechanical properties similar to soft polyvinyl chloride, and has functionalities such as oil resistance and scratch and abrasion resistance. Also known are ethylene-styrene copolymers in which the alternating structure of ethylene and styrene contained in the copolymer has isotactic stereoregularity (Patent Documents 2 and 3). Compared with non-stereoregular copolymers, this copolymer has limited crystallinity (microcrystallinity) based on an alternating structure, so it has further improved mechanical properties and features such as improved heat resistance and oil resistance. . [0003] Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F295/00C08F4/6592C08F255/00
Inventor 荒井亨长谷川胜塚本步见山彰铃木茂
Owner DENKA CO LTD
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