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Polyvinyl chloride resin composition and method for producing the same

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, coloring, etc., and achieve the effect of less coloring and good thermal stability

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

AI Technical Summary

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 or coloration.

Method used

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  • Polyvinyl chloride resin composition and method for producing the same
  • Polyvinyl chloride resin composition and method for producing the same
  • Polyvinyl chloride resin composition and method for producing the same

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0106] (Manufacture of polyvinyl chloride resin)

[0107] Polyvinyl alcohol with a polymerization degree of 850 and a saponification degree of 72 mol% was dissolved in deionized water in an amount equivalent to 600 ppm with respect to vinyl chloride to produce a dispersion stabilizer. The dispersion stabilizer thus obtained was put into a glass-lined autoclave coated with an antifouling agent NOXOL WSW (manufactured by CIRS Corporation) so that the solid content was 0.3 g / m. 2 . Next, 0.04 parts of a 70% toluene solution of diisopropyl percarbonate was added to a glass-lined autoclave, the pressure in the autoclave was exhausted to 0.0067 MPa, and oxygen was removed, then 30 parts of vinyl chloride were added, and the high-pressure The temperature of the contents in the kettle was raised to 57°C, and polymerization was initiated with stirring. The pressure in the autoclave at the start of polymerization was 0.83 MPa. After starting the polymerization, 7 hours later, the pol...

Embodiment 2

[0118] In Example 1, during polymerization, the monomer having a polyoxyalkylene group was changed to polyoxyethylene methacrylamide (n=10), the added weight of vinyl acetate and methanol was changed, and the molar ratio of alkali was changed during saponification, Other than that, POA-modified PVA shown in Table 1 was obtained by the same method. Evaluation of thermal stability and colorability was carried out in the same manner as in Example 1. The evaluation results are shown in Table 1.

Embodiment 3

[0120] In Example 1, during polymerization, the monomer having a polyoxyalkylene group was changed to polyoxyethylene polyoxybutylene methacrylamide (corresponding to R in the general formula (3). 1 is an alkyl group with 2 carbon atoms, R 2 is a hydrogen atom, R 3 is a hydrogen atom, R 4 is methyl, R 5 is a hydrogen atom, R 6 is hydrogen atom, X is -CONH-, m=2, n=10), change the added weight of vinyl acetate and methanol, change the alkali molar ratio during saponification, in addition, follow the same method to obtain as shown in Table 1 POA modified PVA. Evaluation of thermal stability and colorability was carried out in the same manner as in Example 1. The evaluation results are shown in Table 1.

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Abstract

Disclosed is a polyvinyl chloride resin composition containing, per 100 parts by weight of a polyvinyl chloride resin, 0.005-5 parts by weight of a vinyl alcohol polymer containing 0.01-15 mol% of a monomer unit having a specific polyoxyalkylene group in a side chain and having a saponification degree of 30-99.9 mol%, and 0.01-5 parts by weight of a zinc compound. Also disclosed is a polyvinyl chloride resin composition containing, per 100 parts by weight of a polyvinyl chloride resin, 0.005-5 parts by weight of a vinyl alcohol polymer containing 0.5-18 mol% of an ethylene unit and having a saponification degree of a vinyl acetate unit of 30-99.9 mol%, and 0.01-5 parts by weight of a zinc compound. The polyvinyl chloride resin compositions have excellent thermal stability during molding and can provide a molded body which rarely suffers from coloration.

Description

technical field [0001] The present invention relates to a polyvinyl chloride resin composition suitable for use in the fields of food, medical, and daily necessities, and more specifically, to a polyvinyl chloride resin composition having good thermal stability and little coloration. Background technique [0002] Polyvinyl chloride resin has excellent properties such as mechanical strength, flame retardancy, weather resistance, chemical resistance, and the like, and its molded articles are widely used in various applications such as general applications, food applications, and medical applications. However, there is a disadvantage that thermal decomposition, mainly dehydrochlorination, occurs at the time of thermoforming, and the resulting molded body has a problem that the mechanical properties are lowered and the color tone is deteriorated. In order to solve this problem, a method of blending various metal soaps, organic tin compounds, lead salt compounds, organic metal sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K3/10C08L29/04
CPCC08L29/04C08K5/098C08L27/06C08K5/103C08L2666/04C08K3/10C08F14/06
Inventor 加藤雅己坪井明新居真辅仲前昌人
Owner KURARAY CO LTD
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