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Vinyl chloride resin composition for injection molding

A vinyl chloride resin, injection molding technology, applied in the field of vinyl chloride resin composition for injection molding, can solve the problems of poor gloss, unsatisfactory heat resistance of stabilizer, poor surface, etc., and achieves injection molding processability Excellent, no appearance defects, excellent thermal stability and heat resistance

Inactive Publication Date: 2013-12-25
ADEKA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the heat resistance of these stabilizers is unsatisfactory, and there are problems such as dehydrochlorination reaction due to insufficient heat resistance during injection molding, which causes flashes (flash, surface defect) on the appearance of molded products.
In addition, compared with lead-based stabilizers, calcium-zinc-based stabilizers have disadvantages such as poor surface gloss.

Method used

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  • Vinyl chloride resin composition for injection molding
  • Vinyl chloride resin composition for injection molding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4 and comparative example 1～4

[0084]

[0085] The complexes in Table 1 below were stirred at 2000 rpm using a 10 L Henschel mixer, and the temperature was raised to 120°C. After reaching 120° C., it was cooled to 50° C. at 1000 rpm to obtain a compound for injection molding test.

[0086]

[0087] The obtained compound was injection-molded using an injection molding machine EC60NII manufactured by Toshiba Machine Co., Ltd. under the following conditions to obtain a cup-shaped molded body.

[0088] Injection molding conditions:

[0089] Cylinder temperature is 170~200℃

[0090] The injection pressure is 90~95MPa

[0091] Mold temperature is 40°C

[0092] The appearance of the obtained molded body was confirmed visually. Regarding the evaluation of the appearance, the case with burrs (surface defect) was evaluated as x, and the case without burrs was evaluated as ◯. The results are shown in Table 1. In addition, the gloss of the surface of the molded article was measured using a gloss meter (VG-200...

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Abstract

The present invention provides a vinyl chloride resin composition for injection molding, which comprises 100 parts by mass of a vinyl chloride resin, 0.01-10 parts by mass of (a) an organic acid calcium salt and / or an organic acid zinc salt, 0.01-10 parts by mass of (b) a hydrotalcite compound, 0.01-10 parts by mass of (c) a ss-diketone compound, and 0.01-10 parts by mass of (d) a polyol mixture, and which is characterized in that the component (d), i.e., the polyol mixture, is a polyol mixture comprising pentaerythritol and a condensation product thereof and the content of pentaerythritol and the condensation product thereof having a value n of 1 to 3 is 5-40 mass% relative to the total amount of the polyol mixture, wherein n represents the degree of condensation of pentaerythritol.

Description

technical field [0001] The present invention relates to a vinyl chloride-based resin composition for injection molding. Specifically, it relates to thermal stability, resistance A vinyl chloride-based resin composition for injection molding excellent in thermal properties and molding processability; and an injection-molded article excellent in appearance obtained from the vinyl chloride-based resin composition for injection molding. Background technique [0002] Vinyl chloride-based resins are inexpensive and have excellent physical properties. They have properties such as flame retardancy, weather resistance, and chemical resistance, and can be injection molded. They are molded into piping materials such as pipes and joints, and hard building materials such as window frames. Various shapes for a wide range of uses. [0003] In order to suppress thermal decomposition of dehydrochlorination acid or the like during injection molding, it is necessary to add a stabilizer, and c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K3/26C08K5/053C08K5/07C08K5/09
CPCC08K5/053C08K5/098C08K5/07C08K3/26C08K2003/267C08K2201/014C08K13/02C08L27/06C08K5/09
Inventor 平船博纪仙石忠士水真澄
Owner ADEKA CORP
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