Oxygen-absorbing resin composition

An oxygen-absorbing resin and composition technology, applied in the field of packaging materials, can solve problems such as the inability to obtain gas barrier properties, and achieve the effects of inhibiting oxidative deterioration, excellent oxygen-absorbing performance, and excellent heat resistance

Inactive Publication Date: 2006-10-18
TOYO SEIKAN KAISHA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, since EVOH is under high-humidity conditions during this heat sterilization, it not only becomes a state with high oxygen permeability, but also because

Method used

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  • Oxygen-absorbing resin composition
  • Oxygen-absorbing resin composition
  • Oxygen-absorbing resin composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] In low-density polyethylene resin (JB221R, produced by Nippon Polyorefin Co., Ltd.), 5.0% by weight of hydrogenated styrene-isoprene-styrene triblock copolymer resin (Hibura-7125, produced by Co., Ltd.) was mixed. Production, the carbon-carbon double bond content in the resin is 2.0×10 -4 eq / g) and an oxidation catalyst, the above-mentioned method was used to make resin composition pellets, and the oxygen absorption amount (cc / g) of the resin composition was calculated. The results are shown in Table 1.

[0110] In addition, using the pellets, a multi-layer bottle was produced by the above-mentioned method, and the evaluation of the oxygen barrier property and the measurement of the hunter color b value were performed. The results are shown in Table 2.

Embodiment 2

[0112] In addition to replacing hydrogenated styrene-isoprene-styrene triblock copolymer resin, hydrogenated styrene-butadiene-styrene triblock copolymer resin (Taftec P2000, Asahi Kasei Chemical Co., Ltd.) Production, the carbon-carbon double bond content in the resin is 1.9×10 -3 Except eq / g), resin composition pellets were produced in the same manner as in Example 1, and the oxygen absorption amount (cc / g) of the resin composition was calculated. The results are shown in Table 1.

[0113] In addition, using the pellets, a multi-layer bottle was produced by the above-mentioned method, and the evaluation of the oxygen barrier property and the measurement of the hunter color b value were performed. The results are shown in Table 2.

Embodiment 3

[0115] In addition to replacing the hydrogenated styrene-isoprene-styrene triblock copolymer resin, a 2.5% by weight hydrogenated styrene-butadiene-styrene triblock copolymer resin (Taftec P2000, Asahi Kasei Chemikarzu Co., Ltd., the carbon-carbon double bond content in the resin is 1.9×10 -3 eq / g) and 2.5% by weight of hydrogenated styrene-butadiene copolymer resin (Dainaron 1320P, produced by (strain) JSR, the carbon-carbon double bond content in this resin is 2.4 × 10 -5 Except eq / g), resin composition pellets were produced in the same manner as in Example 1, and the oxygen absorption amount (cc / g) of the resin composition was calculated. The results are shown in Table 1.

[0116] In addition, using the pellets, a multi-layer bottle was produced by the above-mentioned method, and the evaluation of the oxygen barrier property and the measurement of the hunter color b value were performed. The results are shown in Table 2.

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PUM

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Abstract

The present invention provides an oxygen-absorbing resin composition which is excellent in oxygen-absorbing performance, suppresses oxidative deterioration of the resin during molding, and does not cause coloring during molding. The present invention provides an oxygen-absorbing resin composition comprising a hydrogenated styrene-diene copolymer (A), a thermoplastic resin (B) having an ethylene structure in its molecular structure, and a transition metal catalyst (C), and the oxidation of the thermoplastic resin (B) is carried out by the copolymer (A) as an initiator to absorb oxygen. Here, the copolymer (A) preferably contains a carbon-carbon double bond derived from a diene in the range of 1×10-5 to 1×10-2 eq/g.

Description

background of the invention [0001] The present invention relates to an oxygen-absorbing resin composition for use in packaging materials for contents that tend to deteriorate in the presence of oxygen, particularly beverages, foods, and pharmaceuticals. [0002] Conventionally, metal cans, glass bottles, various plastic containers, and the like have been used as packaging containers. Plastic containers have the advantages of light weight and excellent impact resistance to a certain extent, but there are problems such as deterioration of the contents and loss of flavor due to oxygen permeating the container wall. In particular, in metal cans and glass bottles, the oxygen permeability through the container wall is zero, and only the oxygen remaining in the container becomes a problem. In contrast, in the case of plastic containers, a non-negligible amount of oxygen permeates through the container wall. , becomes a problem in terms of preservation of the contents. [0003] In o...

Claims

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Application Information

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IPC IPC(8): C08L23/00C08K5/00C08L53/02C08L101/00
Inventor 后藤弘明小松威久男石原隆幸太田芳弘村上惠喜平川叙夫
Owner TOYO SEIKAN KAISHA LTD
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