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Foamable styrene system resin particles

A technology of styrene resin and resin particles, applied in the field of foamable styrene resin particles, can solve the problem of incomplete integration of particles and the like

Active Publication Date: 2013-05-29
SEKISUI PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the particles of the foam obtained in this way are welded to each other to form a shape like a mold, since the particles are not completely integrated with each other, there are fine capillaries on the welded surface of the particles.

Method used

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  • Foamable styrene system resin particles
  • Foamable styrene system resin particles
  • Foamable styrene system resin particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] 40 kg of ion-exchanged water was supplied into an autoclave made of stainless steel and equipped with a stirring device with an inner capacity of 100 liters, and 40 kg of styrene monomer and 40 g of tricalcium phosphate (manufactured by Budenheim Co., Ltd.) were supplied to the ion-exchanged water while stirring the ion-exchanged water. Brand name "C13-09"), 0.5 g of potassium persulfate, 140 g of benzoyl peroxide with a purity of 75% by weight, and 30 g of tert-butyl peroxybenzoate were prepared to prepare a suspension.

[0082] Next, while stirring the above-mentioned suspension at a stirring speed of 200 RPM, the temperature was raised to 90° C. over 1 hour, and the suspension was kept at 90° C. for 6 hours for polymerization, and then 40 g of tricalcium phosphate and 0.4 g of α- Olefin sulfonate (trade name "LIPOLAN PJ-400" manufactured by Lion Corporation), 1600 g of n-pentane and 400 g of isopentane were pressed into it, the temperature of the suspension was raised...

Embodiment 2

[0090] 12-Hydroxystearic acid triglyceride (trade name "K3WAX 500" manufactured by Kawaken Fine Chemicals Co., Ltd.) was replaced with stearic acid triglyceride (trade name "RIKEMAL VT50" manufactured by Riken Vitamin Co., Ltd.) , except that, it was carried out in the same manner as in Example 1.

Embodiment 3

[0092] 0.02 parts by weight of 12-hydroxystearic acid triglyceride (trade name "K3 WAX 500" manufactured by Kawaken Fine Chemicals Co., Ltd.) was replaced with 0.005 parts by weight of 12-hydroxystearic acid triglyceride (Kawaken Fine Chemicals Co. , the trade name "K3WAX 500" manufactured by Ltd.), and 0.02 parts by weight of polyethylene glycol A (trade name "PEG-300" manufactured by NOF Corporation, molecular weight 300) was replaced by 0.01 parts by weight of polyethylene glycol A (NOF Corporation Manufacturing trade name "PEG-300", molecular weight 300), 0.02 parts by weight polyethylene glycol B (trade name "PEG-300" manufactured by NOF Corporation, molecular weight 300) was replaced with 0.03 weight part polyethylene glycol B (Japan It carried out in the same manner as in Example 1, except that the oil company made a brand name "PEG-300", molecular weight 300).

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Abstract

No blocking occurs during pre-foaming, the foamed particles exhibit excellent fluidity, separation of a coating medicinal agent can be prevented, fusion is good, and no oil leakage occurs. The foamable styrene-based resin particles are created by impregnating styrene-based resin particles with a foaming agent. The resin particle surfaces are coated with a composition. The composition comprises a polyethylene glycol (A) having a molar weight of 400 or less that coats the resin particle surfaces, 0.003-0.04 part by weight a of fatty acid triglyceride per 100 parts by weight of said resin particles, 0.2-0.8 part by weight of a fatty acid metal salt per 100 parts by weight of said resin particles, and a polyethylene glycol (B) having a molar weight of 400 or less. The content of the aforementioned polyethylene glycols (A, B) is 0.02-0.08 part by weight per 100 parts by weight of said resin particles, and coating is performed in two separate steps.

Description

technical field [0001] The present invention relates to expandable styrene-based resin particles, pre-expanded particles using the same, and foamed moldings thereof, the expandable styrene-based resin particles are free of stickiness, easy to transport the particles, and safe in pipes. The coated chemical agent does not peel off, and when used as a food container, not only is it excellent in strength and printing performance, but also the property of suppressing permeation of the contents contained in the container to the outside is excellent. Background technique [0002] The foamable thermoplastic resin particles of the present invention can be used as materials for various moldings, among which, as food and drink products containing oil and fat components such as instant noodles, fried chicken, fat-containing foods, regular coffee, and especially, the foamed moldings are permeable to the molded body. It is suitable for use as a foam molding material for containers such as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/224
CPCC08J2325/04C08J2203/14C08J9/224
Inventor 高野雅之山田一己
Owner SEKISUI PLASTICS CO LTD