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Resin composition for injection molding

A resin composition, injection molding technology, applied in the direction of coating, etc., can solve the problems of reduced injection molding fluidity, reduced water pressure resistance of the molded body, etc.

Active Publication Date: 2019-11-29
SEKISUI CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, when these reinforcing agents are mixed with chlorinated vinyl chloride resin, the fluidity at the time of injection molding is lowered, causing problems in terms of manufacturing conditions
[0013] In addition, for the purpose of improving fluidity, a method of using a plasticizer or the like has been carried out, but this method has the problem of causing a decrease in the water pressure resistance of the molded product obtained.

Method used

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  • Resin composition for injection molding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0166] (Production of Chlorinated Vinyl Chloride Resin)

[0167] 200 kg of ion-exchanged water and 56 kg of vinyl chloride resin having an average degree of polymerization of 700 were charged into an enamelled reaction container with an inner volume of 300 L. The mixture was stirred, water was further added to the reaction vessel, and the mixture was dispersed in water. Next, the pressure was reduced to remove oxygen in the reaction container, and the temperature was raised to 90°C.

[0168]Next, chlorine was supplied into the reaction container so that the chlorine partial pressure became 0.4 MPa, and chlorination reaction was performed while adding 0.2 mass % hydrogen peroxide at a ratio of 1 mass part per hour (320 ppm / hour). The reaction was continued until the chlorine content of the chlorinated vinyl chloride resin reached 67.3% by mass. When the chlorine content of the chlorinated vinyl chloride resin reaches 62.3% by mass (5% by mass), the addition of 0.2% by mass of...

Embodiment 2

[0176] Except having changed the addition amount of the vinyl chloride resin into 3 mass parts, it carried out similarly to Example 1, and produced the resin composition for injection molding, and an injection molded object.

Embodiment 3

[0178] Except having changed the addition amount of the vinyl chloride resin into 25 mass parts, it carried out similarly to Example 1, and produced the resin composition for injection molding, and an injection molded object.

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Abstract

The present invention provides: a resin composition for injection molding, which can produce a molded body that exhibits excellent thermal stability, thermal fluidity and high water pressure resistance without using heavy metals such as lead and tin; and a molded body obtained by using the resin composition for injection molding. The present invention is a resin composition for injection molding,which contains a chlorinated vinyl chloride-based resin, a vinyl chloride-based resin and a thermal stabilizer, wherein the thermal stabilizer contains a calcium alkylcarboxylate and a zinc compound,the vinyl chloride-based resin has a degree of polymerization of 400-1000, and the vinyl chloride-based resin is contained at a quantity of 1-30 parts by mass relative to 100 parts by mass of the chlorinated vinyl chloride-based resin.

Description

technical field [0001] The present invention relates to a resin composition for injection molding capable of producing a molded article having excellent thermal stability, thermal fluidity and high water pressure resistance without using heavy metals such as lead and tin, and a molded article using the resin composition for injection molding . Background technique [0002] Vinyl chloride-based resin compositions have been widely used as materials for resin molded articles such as building materials. Vinyl chloride-based resin compositions may be processed at high temperatures, and therefore need to have high thermal stability. In addition, in order to obtain thermal stability of the molded body, it is also necessary to have high thermal stability. Furthermore, since the color tone of a resin molded article used as a building material is important, the vinyl chloride-based resin composition is also required to have coloring resistance. [0003] In response to these require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/24B29C45/00C08F8/20C08K5/098C08L27/06
CPCC08K5/098C08L27/24C08L2205/02C08L2205/035C08F8/22C08K5/005C08L27/06C08L51/04C08L91/08C08F114/06C08F8/20B29C45/0001B29K2027/06B29K2105/0044C08L2201/08C08L2205/025
Inventor 谷口宽增野典和后藤司望月弘章
Owner SEKISUI CHEM CO LTD
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