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Vinylidene chloride-based copolymer, its composition, and its film or sheet

A vinylidene chloride-like copolymer technology, applied in the direction of flexible coverings, packaging, wrapping paper, etc., can solve the problems that the structure cannot obtain the target film molding, the effect is not sufficient, etc., and achieve high recycling adaptability, Less heat-deteriorated impurities and excellent retort adaptability

Active Publication Date: 2016-03-02
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the vinylidene chloride-based copolymer film molded article described in Patent Document 2, although the coloring of the molded article and the time-dependent change in color tone are improved, the effect is not sufficient, and there is a need for complex structures and necessary Disadvantages that the target film molded product cannot be obtained by melt molding with a twin-screw extruder with height adjustment technology

Method used

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  • Vinylidene chloride-based copolymer, its composition, and its film or sheet
  • Vinylidene chloride-based copolymer, its composition, and its film or sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] A glass-lined reactor (inner volume 300L) equipped with three-leaf backward-curved blades (extension diameter 400mm), finger-shaped baffles, thermometers and nitrogen inlet pipes was depressurized to -9.00×10 -2MPa and introduce nitrogen at the same time, so that the interior of the polymerizer is a nitrogen atmosphere. After the decompression and nitrogen replacement operations were repeated three times, 0.15 parts by mass of the polymerization initiator diisopropyl peroxydicarbonate, 18 parts by mass of vinyl chloride (VC), 18 parts by mass of vinylidene chloride (VDC) were put into the reactor. 82 parts by mass, 3,3-dilauryl thiodipropionate (DLTDP) 0.03 parts by mass, dibutyl sebacate (hereinafter referred to as DBS) 3 parts by mass, mixed solution with a stirring speed of 1.4m / sec Stirring was carried out for 20 minutes. Next, add 100 parts by mass of deionized water with a water temperature of 20° C. (the deionized water was bubbled with nitrogen for 2 hours to r...

Embodiment 2

[0115] Regarding the conditions of the polymerization temperature, set the initial polymerization temperature as 35°C, and continue the reaction at this temperature for 15 hours, then raise the temperature to the late polymerization temperature of 62°C in 1 hour, and continue the polymerization for 16 hours, except that it is the same as in Example 1. to operate. The results are listed in Table 1.

Embodiment 3

[0117] Except having used the deionized water whose dissolved oxygen concentration was 7.5 mg / L, it carried out similarly to Example 1. The results are listed in Table 1.

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Abstract

The invention relates to a vinylidene chloride copolymer and its composition, the output of the vinylidene chloride due to thermal decomposition during a melt molding process is little; the membrane or the sheet material with the excellent membrane thickness uniformity and little thermal degradation impurity points can be obtained; and the high frequency seal adaptability and heating pressurization sterilization adaptability (so-called boiling adaptability) of the provided membrane or the sheet material are excellent. The vinylidene chloride copolymer is the vinylidene chloride copolymer formed by vinylidene chloride and a polymerism vinyl monomer, wherein, under the condition that a proton magnetic resonance optical spectroscopy (1H-NMR) is used for analysis, integral value of a signal of carbon-carbon double bond of the terminal of a molecular chain is less than 0.5 mole% by comparing with that of a monomer unit using for forming the vinylidene chloride copolymer.

Description

technical field [0001] The present invention relates to a vinylidene chloride-based copolymer capable of producing a film or sheet having a small amount of vinylidene chloride generated by thermal decomposition due to thermal decomposition, excellent film thickness uniformity, and a small number of thermally degraded impurity points, and a combination thereof objects; a film or sheet thereof having excellent high-frequency sealing suitability and heat-pressurization sterilization suitability (so-called retort suitability); and a food packaging container using the film or sheet. Background technique [0002] For films, sheets, and containers made of vinylidene chloride-based copolymer compositions, it is excellent in oxygen barrier properties, moisture resistance, transparency, chemical resistance, oil resistance, adhesion, and heat shrinkage. It is suitable for use in food packaging materials, plastic wrap, etc. There are suspension polymerization method and emulsion polyme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F214/08C08F214/06C08L27/08C08L27/06B65D65/46
Inventor 武井徹吉田谦次
Owner ASAHI KASEI KK
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