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Polyvinyl chloride resin composition and manufacturing method thereof

A technology of polyvinyl chloride resin and manufacturing method, which is applied in the field of polyvinyl chloride resin composition, can solve the problems of insufficient thermal stability and coloring, and achieve the effect of excellent thermal stability and less coloring

Active Publication Date: 2011-07-13
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] However, the polyvinyl chloride resin compositions described in Patent Documents 1-8 and Non-Patent Documents 1-5 have problems of insufficient long-term thermal stability and coloration.

Method used

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  • Polyvinyl chloride resin composition and manufacturing method thereof

Examples

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Effect test

Embodiment 1

[0075] (Manufacture of polyvinyl chloride resin)

[0076] Polyvinyl alcohol having a degree of polymerization of 850 and a degree of saponification of 72% by mole was dissolved in deionized water in an amount corresponding to 600 ppm relative to vinyl chloride to prepare a dispersion stabilizer. The dispersion stabilizer thus obtained was added to a glass-lined autoclave coated with an anti-fouling adhesion agent NOXOL WSW (manufactured by CIRS Corporation) so that the solid content was 0.3 g / m 2 . Then, in the glass-lined autoclave, add 0.04 parts of 70% toluene solution of diisopropyl peroxydicarbonate, exhaust to the pressure in the autoclave to be 0.0067 MPa, remove oxygen, then add 30 parts of vinyl chloride, the The contents of the autoclave were warmed to 57°C, and polymerization was initiated with stirring. The pressure in the autoclave was 0.83 MPa at the start of the polymerization. After 7 hours from the initiation of the polymerization, the polymerization was te...

Embodiment 2-7

[0088] In embodiment 1, change the addition weight of vinyl acetate and methyl alcohol during polymerization, change alkali molar ratio during saponification, obtain the PVA shown in table 1 according to the same method except this. Evaluations of thermal stability and colorability were performed in the same manner as in Example 1. The evaluation results are shown in Table 1.

Embodiment 8

[0090] The PVA shown in Table 1 was obtained in the same manner except that sodium acetate was additionally added to 100 parts by weight of the PVA obtained in Example 1 so that the sodium acetate content was 2 parts by weight. In the same manner as in Example 1, thermal stability and colorability were evaluated. The evaluation results are shown in Table 1.

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Abstract

Disclosed is a polyvinyl chloride resin composition containing 0.005-5 parts by weight of a vinyl alcohol-based polymer with a degree of saponification of 75-99.9 mol% and with a viscosity-average degree of polymerization of 450 or less, and 0.01-5 parts by weight of a zinc compound, with respect to 100 parts by weight of a polyvinyl chloride resin. A polyvinyl chloride resin composition having excellent thermal stability when molded and with which a molded body having little coloration can be obtained is thus obtained.

Description

technical field [0001] The present invention relates to a polyvinyl chloride resin composition suitable for use in the fields of food, medical, daily necessities, etc., and further relates to a polyvinyl chloride resin composition with good thermal stability and less coloration. Background technique [0002] Polyvinyl chloride resin is mixed with calcium-zinc-based, barium-zinc-based stabilizers, etc., and molded. The molded products are widely used as products suitable for general purposes, and further suitable for food and medical applications. [0003] However, these stabilizers have insufficient ability to suppress thermal deterioration of polyvinyl chloride resins, and thus have the disadvantages of impairing the initial colorability of molded articles and insufficient thermal stability during molding. Therefore, polyvinyl chloride resin compositions to which an antioxidant or a compound having a hydroxyl group is added have been proposed as means for improving these di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K3/10C08L29/04
CPCC08L29/04C08K5/098C08L27/06C08K5/103C08L2666/04
Inventor 加藤雅己坪井明仲前昌人
Owner KURARAY CO LTD
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