Non-crosslinked polypropylene resin pre-expanded particles and in-mold foamed moldings

A cross-linked polypropylene and pre-foaming technology, which is applied in the field of in-mold foaming moldings, can solve problems such as undetermined effects and unexpectable effects, and achieve the effects of excellent weldability, excellent antistatic properties, and less pollution

Active Publication Date: 2015-10-28
KANEKA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology suppresses migration of the antistatic agent to the surface of the molded article by cross-linking the polyolefin-based resin used as the base resin, and the effect on non-cross-linked polypropylene-based resins cannot be expected
In addition, the disclosed foam is also a foam obtained by filling an expandable resin composition in a mold and foaming it, and the effect when it is applied to pre-expanded particles has not yet been confirmed.

Method used

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  • Non-crosslinked polypropylene resin pre-expanded particles and in-mold foamed moldings
  • Non-crosslinked polypropylene resin pre-expanded particles and in-mold foamed moldings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0069] Hereinafter, the present invention will be explained in more detail based on examples, but the present invention is not limited to these.

[0070]

[0071] Using a "Hirester MCP" tester manufactured by Mitsubishi Chemical Corporation, a voltage of 500V was applied to the surface of a molded body of 400×300×50mm for 1 minute, a measurement temperature of 23°C, and a humidity of 50%RH under the conditions of an atmosphere, according to JIS K6911 measures the surface resistivity. The lower the surface resistivity value, the higher the antistatic property.

[0072]

[0073] The molded body was directly touched by hand for evaluation. A sample with a sticky feeling is marked as ×, and a sample without sticky feeling is marked as ○. In addition, a glass plate of 100×100×1 mm was covered on the surface of the molded body, and after heat treatment in an oven at 80° C. for 1 week, it was restored to room temperature, and the dirt adhering to the glass plate was judged. The sample ...

manufacture example 1

[0092] After mixing a mixture of 90 parts by weight of polyether / polyolefin block copolymer ("Pelestat 300" manufactured by Sanyo Chemical Industry Co., Ltd.) and 10 parts by weight of lithium bis(trifluoromethanesulfonyl)imide with a Henschel mixer, It was put into a twin-screw extruder, kneaded and extruded while heating at a temperature of 200°C, and then pelletized after water cooling to obtain an ion conductive polymer type antistatic agent (A).

manufacture example 2

[0094] In Production Example 1, except for changing the lithium bis(trifluoromethanesulfonyl)imide to lithium trifluoromethanesulfonate, the ion conductive polymer type antistatic agent (B) was obtained by the same method as in Production Example 1. .

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Abstract

Pre-expanded noncrosslinked polypropylene-based resin particles are provided, which comprise a noncrosslinked polypropylene-based resin composition that contains 1 wt% to 30 wt% of an ion-conducting polymer-type anti-static agent that is made of an amphiphilic block copolymer and contains an alkali metal salt of a fluoroalkylsulfonic acid; a method for producing an in-mold expansion-molded article of a noncrosslinked polypropylene-based resin is provided, which comprises the step of filling the foregoing pre-expanded particles into a mold capable of being closed but incapable of being hermetically sealed, and heating the same with water vapor so that the particles are molded; and an in-mold expansion-molded article is provided, which is obtained by the foregoing producing method. Pre-expanded noncrosslinked polypropylene-based resin particles that allow for the production of in-mold expansion molded articles that exhibit an excellent anti-static property and are less contaminating, and an in-mold expansion-molded article obtained from the foregoing pre-expanded particles can be provided.

Description

[0001] This application is a divisional application for an invention patent application with an application date of October 30, 2007, an application number of 200780047245.8, and an invention title of "non-crosslinked polypropylene resin pre-expanded particles and in-mold foaming moldings". Technical field [0002] The present invention relates to non-crosslinked polypropylene resin pre-expanded particles having excellent antistatic properties, an in-mold foamed article obtained from the non-crosslinked polypropylene resin pre-expanded particles, and a method for producing the same. Background technique [0003] Compared with the foamed product obtained from the polystyrene resin pre-expanded particles, the foamed product obtained from the polypropylene resin pre-expanded particles has chemical resistance, heat resistance, cushioning property, and compression set recovery. It has excellent properties, and has excellent heat resistance and compressive strength even when compared wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/10C08K5/42C08J9/18
CPCC08J9/232C08J2323/10C08K5/42C08L23/10C08L53/00C08L2203/14C08L2666/24
Inventor 市村忠行
Owner KANEKA CORP
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