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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 problems such as low transparency, insufficient polymer dispersion, and insufficient long-term thermal stability, and achieve high transparency and thermal stability good effect

Inactive 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 insufficient long-term thermal stability and insufficient dispersibility of the added polymer in the vinyl chloride molded product, resulting in low transparency. The problem

Method used

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  • Polyvinyl chloride resin composition and manufacturing method thereof

Examples

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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 2-6

[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. Thermal stability and transparency were evaluated in the same manner as in Example 1. The evaluation results are shown in Table 1.

Embodiment 7

[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 5 parts by weight. In the same manner as in Example 1, thermal stability and transparency 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 30 mol% or greater and less than 75 mol% and with a viscosity-average degree of polymerization less than 300, 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 good thermal stability when molded and with which a molded body having excellent transparency can be obtained is thus provided.

Description

technical field [0001] The present invention relates to a polyvinyl chloride resin composition, and further relates to a polyvinyl chloride resin composition excellent in thermal stability and transparency. Background technique [0002] Polyvinyl chloride resin has excellent properties such as mechanical strength, flame retardancy, weather resistance, and chemical resistance, and its molded products are widely used in various applications. However, during thermoforming processing, dehydrochlorination mainly occurs. disadvantages of thermal decomposition. Therefore, there is a problem that the mechanical properties of the obtained molded body are lowered, and the color tone is deteriorated. In order to solve this problem, organometallic salts such as various metal soaps, organotin compounds, lead salt compounds, and organophosphites are used as stabilizers. Among these organometallic salts, calcium-zinc stabilizers, barium-zinc stabilizers, and the like are often used becau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K5/098C08L29/04
CPCC08L29/04C08K5/098C08L27/06C08K5/103
Inventor 加藤雅己坪井明仲前昌人R.富斯S.米歇尔
Owner KURARAY CO LTD