Composition used for preparing EVA copolymer, EVA copolymer and preparation method of EVA copolymer

A technology of a composition and a copolymer, applied to the composition for preparing an EVA copolymer, an EVA copolymer and the preparation field thereof, can solve the problems such as the EVA copolymer forming foam or fisheye, and the difficulty of directly cross-linking and regulating MI, Achieving the effect of high melt tension

Active Publication Date: 2015-03-18
HANWHA TOTAL ENERGIES PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, direct crosslinking with organic peroxides has several disadvantages when applied to films or wires
That is, it is quite difficult to adjust MI by direct cross-linking, and EVA copolymers copolymerized by direct cross-linking are prone to form foam or fish eyes

Method used

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  • Composition used for preparing EVA copolymer, EVA copolymer and preparation method of EVA copolymer
  • Composition used for preparing EVA copolymer, EVA copolymer and preparation method of EVA copolymer
  • Composition used for preparing EVA copolymer, EVA copolymer and preparation method of EVA copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] EVA copolymer (MI=8g / 10min, VA=26wt%) (produced by Samsung Total Petrochemicals Co., containing 500ppm of Irganox1076 as an antioxidant) and 230ppm of tert-butyl-(2-ethylhexyl) as a crosslinking agent Monoperoxycarbonate (Luperox TBEC, produced by Arkema), 115 ppm of triallyl isocyanurate (TAICROS, produced by Evonik) as a co-crosslinking agent, and 700 ppm of white mineral oil (Palamium KL-500, Seojin Chemical Co. Production) mixed at room temperature for 10 minutes, after which the trace crosslinkability of the composition used to prepare the EVA copolymer was evaluated by extrusion at 200 ° C using a twin-screw extruder with a screw speed of 50 rpm. obtained, and the evaluation results are shown in Table 2.

Embodiment 2

[0043] EVA copolymer (MI=15g / 10min, VA=28wt%) (produced by Samsung Total Petrochemicals Co., containing 500ppm of Irganox 1076 as an antioxidant) and 230ppm of tert-butyl-(2-ethylhexyl) as a crosslinking agent Monoperoxycarbonate (Luperox TBEC, produced by Arkema), 115 ppm of triallyl isocyanurate (TAICROS, produced by Evonik) as a co-crosslinking agent, and 700 ppm of white mineral oil (Palamium KL-500, produced by Seojin Chemical Co. ) were mixed at room temperature for 10 minutes before evaluating the trace crosslinkability of the composition for the preparation of the EVA copolymer obtained by extrusion at 200° C. using a twin-screw extruder with a screw speed of 50 rpm , Table 2 shows the evaluation results.

Embodiment 3

[0045] A composition for preparing an EVA copolymer was prepared in the same manner as in Example 1 in terms of mixing ratio and extrusion method, except that 700 ppm of isoparaffin (IP1620, produced by Idemitsu) was used as a diluent instead of white mineral oil . The trace crosslinkability of the prepared compositions was evaluated, and the evaluation results are shown in Table 2.

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Abstract

The invention discloses a composition used for preparing an EVA copolymer cross-linked in trace amount, the EVA copolymer and a preparation method of the EVA copolymer. The composition comprises gel or fisheye which is provided with high fusion tension and lowest probability. The composition comprises 50-500 pm one kind or various kinds of organic peroxides which are selected from dialkyl peroxides crosslinking agent, alkyl group peroxy esters crosslinking agent and peroxy ketals crosslinking agent and have one-minute half-life period temperature of 130 DEG to 190 DEG C. the composition also comprises 50-250 ppm common crosslinking agent, 100-1500 pm diluents and 50-600 ppm antioxidant and ethylene-vinyl acetate (EVA) with melt index (MI) of 8-25g/10min and with 26%-28wt% of vinyl acetate (VA).

Description

technical field [0001] The present invention relates to an ethylene-vinyl acetate (EVA) copolymer crosslinked in a trace amount and a method for preparing the EVA copolymer, and more particularly, to a method for preparing an EVA copolymer crosslinked in a trace amount A composition, an EVA copolymer and a method for preparing the EVA copolymer, wherein the composition has high melt tension and very low probability of gel or fish eye (fish eye, or crystal point) formation. Background technique [0002] In order to form a stable and good foam, the EVA copolymer resin used in the foam should have optimum melt tension and melt index (MI). Among EVA resins, resins with higher vinyl acetate (VA) content generally enable highly stretchable foam products. However, the higher the VA content, the more difficult it is to obtain products with high melt tension or low MI. In order to reduce the MI of EVA copolymer resins containing high VA content while increasing the melt tension, va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08K5/00C08K5/14C08K5/3492C08K5/103C08J3/24
CPCC08J3/242C08J2323/08C08K5/1345C08K5/14C08K5/34924C08L23/0853C08K5/0025C08K5/005C08K5/13C08K5/49
Inventor 曺再焕张喜贞金景炫李球炯
Owner HANWHA TOTAL ENERGIES PETROCHEMICAL CO LTD
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