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Particle of carbon-containing modified polystyrene resin, expandable particle of carbon-containing modified polystyrene resin, expanded particle of carbon-containing modified polystyrene resin, molded

A technology of polypropylene-based resin and polystyrene, applied in the field of carbon-containing modified polystyrene-based resin particles, which can solve the problems of insufficient blackness, rigidity, foaming formability, chemical resistance, heat resistance and blackness Excellent heat resistance and excellent blackness can be achieved without problems such as maintaining good degree of blackness and not being able to obtain sufficient blackness

Inactive Publication Date: 2010-01-27
SEKISUI PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] Furthermore, in the expanded styrene-modified polyethylene resin particles, if a large amount of polystyrene exists on the surface of the particles, sufficient blackness cannot be obtained even if carbon is added.
However, the black styrene-modified polyethylene resin foamed particles disclosed in Patent Documents 5 and 6 have insufficient blackness due to the presence of polystyrene on the surface of the particles.
[0017] In addition, even if the flame retardants or flame retardant additives disclosed in Patent Documents 7 and 8 are simply impregnated into the foamed molded articles disclosed in Patent Documents 1 to 4, it is impossible to achieve rigidity, foam moldability, and durability. Self-extinguishing molded foam with excellent chemical resistance, heat resistance, and blackness retention

Method used

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  • Particle of carbon-containing modified polystyrene resin, expandable particle of carbon-containing modified polystyrene resin, expanded particle of carbon-containing modified polystyrene resin, molded
  • Particle of carbon-containing modified polystyrene resin, expandable particle of carbon-containing modified polystyrene resin, expanded particle of carbon-containing modified polystyrene resin, molded
  • Particle of carbon-containing modified polystyrene resin, expandable particle of carbon-containing modified polystyrene resin, expanded particle of carbon-containing modified polystyrene resin, molded

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0218] 1880 g of polypropylene-based resin (manufactured by Prime Polymer Co., Ltd., trade name "F-744NP", melting point: 140° C.) and 120 g of furnace carbon black (manufactured by Mitsubishi Chemical Corporation, trade name "#900") were mixed , the mixture was supplied to an extruder, melt-kneaded, and granulated by linear cutting to obtain a spherical (egg-shaped) containing 6% by mass of furnace carbon black in a polypropylene-based resin. Carbon polypropylene resin pellets. The carbon-containing polypropylene-based resin particles at this time were adjusted to be 80 mmg per 100 particles, and the average particle diameter was about 1 mm.

[0219] Next, in a 5L autoclave with a stirrer, 800 g of the carbon-containing polypropylene-based resin particles were added, and 2 kg of pure water, 20 g of magnesium pyrophosphate, and 0.5 g of sodium dodecylbenzenesulfonate were added as an aqueous medium, Stir and suspend in the aqueous medium, keep for 10 minutes, then raise the t...

Embodiment 2

[0228] 1880 g of polypropylene-based resin (manufactured by Prime Polymer Co., Ltd., trade name "F-744NP", melting point: 140° C.) and 120 g of furnace carbon black (manufactured by Mitsubishi Chemical Corporation, trade name "#900") were mixed , the mixture was supplied to an extruder, melt-kneaded, and granulated by linear cutting to obtain a spherical (egg-shaped) containing 6% by mass of furnace carbon black in a polypropylene-based resin. Carbon polypropylene resin pellets. The carbon-containing polypropylene-based resin particles at this time were adjusted to be 80 mmg per 100 particles, and the average particle diameter was about 1 mm.

[0229] Next, in a 5L autoclave with a stirrer, 600 g of the carbon-containing polypropylene-based resin particles was added, and 2 kg of pure water, 20 g of magnesium pyrophosphate, and 0.5 g of sodium dodecylbenzenesulfonate were added as an aqueous medium, Stir and suspend in the aqueous medium, keep for 10 minutes, then raise the te...

Embodiment 3

[0238] 1880 g of polypropylene-based resin (manufactured by Prime Polymer Co., Ltd., trade name "F-744NP", melting point: 140° C.) and 120 g of furnace carbon black (manufactured by Mitsubishi Chemical Corporation, trade name "#900") were mixed , the mixture was supplied to an extruder, melt-kneaded, and granulated by linear cutting to obtain a spherical (egg-shaped) containing 6% by mass of furnace carbon black in a polypropylene-based resin. Carbon polypropylene resin pellets. The carbon-containing polypropylene-based resin particles at this time were adjusted to be 80 mmg per 100 particles, and the average particle diameter was about 1 mm.

[0239]Next, in a 5L autoclave with a stirrer, 1000 g of the carbon-containing polypropylene-based resin particles was added, and 2 kg of pure water, 20 g of magnesium pyrophosphate, and 0.5 g of sodium dodecylbenzenesulfonate were added as an aqueous medium, Stir and suspend in the aqueous medium, keep for 10 minutes, then raise the te...

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Abstract

Carbon-containing modified polystyrene resin particles which contain a carbon-containing polypropylene resin and contain a polystyrene resin in an amount of 100-400 parts by mass, excluding 400 parts by mass, per 100 parts by mass of the carbon-containing polypropylene resin. The polystyrene resin proportion in a central part of each particle as calculated from the ratio between absorbances at 698 cm<-1> and 1,376 cm<-1> (D698 / D1376) obtained from an infrared absorption spectrum for the central part in infrared spectroscopic analysis by the ATR method is at least 1.2 times the polystyrene resin proportion in the whole particle.

Description

technical field [0001] The present invention relates to: carbon-containing modified polystyrene resin particles obtained by polymerizing styrene with carbon-containing polypropylene resin as the core; foamable carbon-containing modified polystyrene particles impregnated with a blowing agent Vinyl resin particles; carbon-containing modified polystyrene resin foamed particles obtained by pre-expanding the particles; carbon-containing modified polystyrene resin obtained by subjecting the foamed particles to in-mold foam molding Foam moldings; and methods for their manufacture. [0002] This application claims the priority of Japanese Patent Application No. 2007-082128 filed in Japan on March 27, 2007, and Japanese Patent Application No. 2007-082129 filed in Japan on March 27, 2007, the contents of which are incorporated herein by reference. Background technique [0003] Conventionally, it has been known that polystyrene resin foamed molded articles obtained by filling polystyr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08F2/44C08J9/18
Inventor 石田真司小泽正彦
Owner SEKISUI PLASTICS CO LTD
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