JPS6232130A - Expanded plastic bead - Google Patents

Expanded plastic bead

Info

Publication number
JPS6232130A
JPS6232130A JP17277585A JP17277585A JPS6232130A JP S6232130 A JPS6232130 A JP S6232130A JP 17277585 A JP17277585 A JP 17277585A JP 17277585 A JP17277585 A JP 17277585A JP S6232130 A JPS6232130 A JP S6232130A
Authority
JP
Japan
Prior art keywords
plastic beads
beads
foamed plastic
conductive
expanded plastic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP17277585A
Other languages
Japanese (ja)
Inventor
Keisuke Nakao
中尾 恵介
Shuzo Abe
修三 阿部
Toshio Negishi
根岸 富志夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shinto Paint Co Ltd
Original Assignee
Shinto Paint Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shinto Paint Co Ltd filed Critical Shinto Paint Co Ltd
Priority to JP17277585A priority Critical patent/JPS6232130A/en
Publication of JPS6232130A publication Critical patent/JPS6232130A/en
Pending legal-status Critical Current

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  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

PURPOSE:The titled beads having permanent flame retardancy and electric conductivity, obtained by applying an electroconductive paint containing a flame retardant to the surfaces of expanded plastic beads. CONSTITUTION:An electroconductive paint is obtained by adding an aliphatic linear urethane resin (B) of a number-average MW of 20,000-100,000, an electroconductive substance (C) selected from among 60-85wt% fine metallic powder and/or metal oxide (e.g., ZnO), 7-20wt% carbon black and 50-70wt% graphite and 10-50 PHR of a flame retardant (D) [e.g., tris(chloroethyl) phosphate] to a mixed solvent (A) comprising 60% or above alcohol solvent and 40% or below aromatic solvent (e.g., toluene) and uniformly dispersing the mixture by agitation. This coating is spray-applied to the surfaces of expanded plastic beads and air-dried.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は発泡プラスチックビーズ、特に導電性あるいは
導電性及び難燃性を付与ぎれた発泡プラスチックビーズ
に関するものである〔従来の技術〕 発泡プラスチックビーズは、軽量で一定の成形が可能で
あるために建材、断熱材等の他にエレクトロニクス産業
、精密機器産業、計測器産業、カメラ等光学機器産業に
おいて部品、半製品、製品の搬送用通い箱、包装材等と
して利用されている。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to foamed plastic beads, particularly foamed plastic beads that are electrically conductive or have been imparted with electrical conductivity and flame retardancy [Prior Art] Foamed plastic beads Because it is lightweight and can be molded to a certain degree, it is used as a returnable box for transporting parts, semi-finished products, and products in the electronics industry, precision equipment industry, measuring instrument industry, camera and other optical equipment industries, as well as building materials, insulation materials, etc. It is used as packaging material, etc.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

しかしながら発泡プラスチックビーズは静電気放電によ
る静電破壊の問題、精密機器および計測機器などにおい
てはゴミ付着の問題を起こしやすく、かかる問題を嫌う
用途″においてはその利用範囲が大巾に制限されていた
〔問題点を解決するための手段〕 本発明者は前記しな光泡プラスチックビーズの静電破壊
やゴミ付着問題を解決すると共にそれらの利用範囲を拡
大することを目的として研究しな。その結果発泡プラス
チックビーズとして導電性塗料を塗布したものを用いた
場合かかる問題を解決できることを見い出し、導電性塗
料について研究を進めたところ1.導電性塗料として通
常のアクリル系導電塗料等を適用した場合は使用溶剤と
してケトン系、芳香族炭化水素系、エステル系等の溶剤
が用いられるため発泡プラスチックビーズを溶解あるい
は凝集変形させる問題があることがわかった。
However, foamed plastic beads tend to cause problems with electrostatic damage caused by static electricity discharge and dust adhesion in precision instruments and measuring instruments, and their range of use has been severely limited in applications where such problems are averse. Means for Solving the Problems] The present inventor conducted research for the purpose of solving the problems of electrostatic damage and dust adhesion of the above-mentioned shiny foam plastic beads, and expanding the scope of their use.As a result, foaming We discovered that this problem could be solved by using plastic beads coated with conductive paint, and conducted research on conductive paint. 1. When ordinary acrylic conductive paint is used as the conductive paint, It has been found that since ketone-based, aromatic hydrocarbon-based, ester-based, and other solvents are used as solvents, there is a problem in that the foamed plastic beads are dissolved or agglomerated and deformed.

本発明者は発泡プラスチックビーズを溶解することなく
、したがって凝集変形させることのない溶剤系とその溶
剤系への溶解性の優れた樹脂組成物に関しさらに研究を
重ねた結果、脂肪族系線状ウレタン樹脂とアルコール系
溶剤を主成分とする混合溶剤を使用することにより、上
記問題点を解決することを見いだし、本発明を完成した
As a result of further research into a solvent system that does not dissolve foamed plastic beads and therefore do not cause agglomeration and deformation, and a resin composition with excellent solubility in the solvent system, the present inventor discovered that aliphatic linear urethane It was discovered that the above-mentioned problems could be solved by using a mixed solvent whose main components are a resin and an alcohol solvent, and the present invention was completed.

すなわち本発明は導電性を付与した発泡プラスチックビ
ーズに関するものであり、必要により難燃剤を含有した
導電性塗料を塗布することにより導電性あるいは導電性
及び難燃性を付与した発泡プラスチックビーズに関する
ものである。
That is, the present invention relates to foamed plastic beads imparted with electrical conductivity, and relates to foamed plastic beads imparted with electrical conductivity or electrical conductivity and flame retardancy by coating with a conductive paint containing a flame retardant if necessary. be.

本発明の発泡プラスチックビーズは通常のプラスチック
たとえばポリスチレン、ポリエチレンなどを発泡させた
もので発泡倍率が30倍程度の一次発泡品は加圧釜によ
り所定の型に成型され、又低発泡品(広義には発泡倍率
10以下)は専用の射出成型機で成型されることにより
断熱性、吸音性、弾力性、軽量化などの、新しい性質が
付与されるものである。
The foamed plastic beads of the present invention are made by foaming ordinary plastics such as polystyrene, polyethylene, etc. Primary foamed products with an expansion ratio of about 30 times are molded into a predetermined mold in a pressure cooker, and low-foamed products (in a broad sense Foaming ratio (10 or less) is molded using a special injection molding machine to impart new properties such as heat insulation, sound absorption, elasticity, and weight reduction.

前記発泡プラスチックビーズの表面に塗布することによ
り導電性を付与するのに用いられる導電性塗料はアルコ
ール系溶剤を主成分とする混合溶剤を使用することが必
要でありかかる混合溶剤はアルコール系溶剤、たとえば
イソプロピルアルコール、n−ブチルアルコールなどを
主体とし、芳香族系溶剤(たとえばキシレン・トルエン
など)を助溶剤とする混合溶剤で、アルコール系溶剤が
、塗装時において、60%以上あることが好ましい。
The conductive paint used to impart conductivity to the surface of the foamed plastic beads requires the use of a mixed solvent containing an alcohol-based solvent as a main component. For example, it is a mixed solvent mainly composed of isopropyl alcohol, n-butyl alcohol, etc., and an aromatic solvent (for example, xylene, toluene, etc.) as a co-solvent, and it is preferable that the alcohol solvent accounts for 60% or more at the time of coating.

またかかる溶剤系への溶解性の優れた樹脂組成としては
脂肪族系線状ウレタン樹脂が好ましく、これは通常のウ
レタン系ラッカー例えばデスモラック4125(住友バ
イエルウレタン社製)、デスモラック4200 (住友
バイエルウレタン社製)、タケラックE−35OA(大
田薬品社製)、タケラックE−365(武田薬品社鉢製
)等でよいが、塗装作業性の面から数平均分子量20,
000〜100,000程度のものが好ましい。本発明
に用いる導電性塗料組成物の導電性特性は、金属微粉末
、たとえばニッケル、銅、鉄など、および/または、金
属酸化物たとえば酸化亜鉛、酸化錫などおよび/または
導電性を有する合金および/または、カーボンブラック
および/または、グラファイト等を前記樹脂中に均一分
散することにより得られる金属微粉末および、金属酸化
物および、導電性を有する合金の含有量は、塗料固形分
中60〜85重量%が好ましく、またカーボンブラック
の含有量は塗料固形分中7〜20重量%、グラファイト
は50〜70重量%が好ましい。
Further, as a resin composition having excellent solubility in such a solvent system, an aliphatic linear urethane resin is preferable, and this is a typical urethane lacquer such as Desmolac 4125 (manufactured by Sumitomo Bayer Urethane Co., Ltd.), Desmolac 4200 (manufactured by Sumitomo Bayer Urethane Co., Ltd.), and desmolac 4200 (manufactured by Sumitomo Bayer Urethane Co., Ltd.) (manufactured by Urethane Co., Ltd.), Takelac E-35OA (manufactured by Ota Pharmaceutical Co., Ltd.), Takelac E-365 (manufactured by Takeda Pharmaceutical Co., Ltd.), etc.;
000 to about 100,000 is preferable. The conductive properties of the conductive coating composition used in the present invention are determined by metal fine powders such as nickel, copper, iron, etc., metal oxides such as zinc oxide, tin oxide, etc., and/or conductive alloys and/or metal oxides such as zinc oxide, tin oxide, etc. Alternatively, the content of metal fine powder, metal oxide, and conductive alloy obtained by uniformly dispersing carbon black and/or graphite in the resin is 60 to 85% in the solid content of the paint. The content of carbon black is preferably 7 to 20% by weight in the solid content of the paint, and the content of graphite is preferably 50 to 70% by weight.

また本発明の導電性塗料組成物中には、°着色材たとえ
ば、チタン白、有機顔料、無機顔料等を必要に応じて配
合分散して、任意の塗色を得ることができる。発泡プラ
スチックは静電気放電により発火する危険性があり、ま
た、建造物として用いられた場合には、難燃性が必須要
件となる。かかる場合難燃剤を】0〜50PHR配合す
ることにより難燃性を付与することができる。分散容易
な難燃剤としてたとえば、トリス(クロロエチル)ホス
ヘート、トリス(ジクロロプロピル)ホスヘート、縮合
リン酸エステル、トリス(トリブロモフェニル)ホスヘ
ートなどがある。
Further, in the conductive coating composition of the present invention, colorants such as titanium white, organic pigments, inorganic pigments, etc. can be blended and dispersed as necessary to obtain any coating color. Foamed plastics have the risk of catching fire due to electrostatic discharge, and when used in buildings, flame retardancy is an essential requirement. In such cases, flame retardancy can be imparted by blending a flame retardant in an amount of 0 to 50 PHR. Examples of easily dispersible flame retardants include tris (chloroethyl) phosphate, tris (dichloropropyl) phosphate, condensed phosphoric acid ester, and tris (tribromophenyl) phosphate.

本発明の導電性塗料組成物は、ボールミルまたは、アト
ライターなどにより上記各成分を組成し、均一に混合分
散することにより得られる。
The conductive coating composition of the present invention can be obtained by composing the above-mentioned components using a ball mill, an attritor, or the like, and uniformly mixing and dispersing the components.

本発明の導電性塗料組成物の塗装方法は特に制限はない
が流動層中でのスプレー塗装が適している。
Although there are no particular limitations on the method of applying the conductive coating composition of the present invention, spray coating in a fluidized bed is suitable.

実施例1 下記配合組成をボールミルにて均一に混合分散して導電
性塗料組成物を調製した。次に得られた前記導電性塗料
組成物を一次発泡ポリエチレンビーズを空気中に均一に
流動させた状態でスプレーにより塗装し、自然乾燥して
本発明の導電性発泡ポリエチレンビーズを得た。
Example 1 A conductive coating composition was prepared by uniformly mixing and dispersing the following formulation in a ball mill. Next, the obtained conductive coating composition was applied by spraying the primary foamed polyethylene beads while uniformly flowing in the air, and air-dried to obtain the conductive foamed polyethylene beads of the present invention.

このビーズは素材の変形もなく、またその成型品の表面
抵抗値を測定したところI X 10’Ω cmと良好
な帯電防止適性を示した。
The material of these beads did not undergo any deformation, and the surface resistance of the molded product was measured to be I x 10'Ω cm, indicating good antistatic properties.

配合組成 脂肪族系線状ウレタン樹脂   62重量部(デスモラ
フク4125<住友バイエルクシタン社製〉)導電性酸
化亜鉛        46重量部イソプロピルアルコ
ール    18重量部n−ブタノール       
 18重量部トルエン           18重量
部シアニンググリーン       1重量部実施例2 下記配合組成をボールミルにて均一に混合分散して導電
性塗料組成物を調製した。
Blend composition Aliphatic linear urethane resin 62 parts by weight (Desmolafuku 4125 <manufactured by Sumitomo Bayer Luxitane>) Conductive zinc oxide 46 parts by weight Isopropyl alcohol 18 parts by weight n-butanol
18 parts by weight Toluene 18 parts by weight Cyaning green 1 part by weight Example 2 The following formulation was uniformly mixed and dispersed in a ball mill to prepare a conductive coating composition.

得られた前記導電性塗料組成物を一次発泡ポリスチレン
ビーズにスプレー塗装、自然乾燥して本発明の導電性及
び難燃性を有する発泡ポリスチレンビーズを得た。
The obtained electrically conductive coating composition was spray-coated onto primary expanded polystyrene beads and air-dried to obtain expanded polystyrene beads having electrical conductivity and flame retardancy of the present invention.

次にこれを成型加しこの成型品の難燃性を評価した結果
、本発明の導電性塗料組成物を塗装しないで成型加工し
たものの燃焼率は1゜15 (+s/ sec )であ
ったが、本発明の導電性塗料組成物を塗装して成型加工
したものの燃焼率は0.4(an / 5ec)と自己
消化性のランクにあった。
Next, this was molded and the flame retardancy of this molded product was evaluated. As a result, the combustion rate of the molded product without coating with the conductive paint composition of the present invention was 1°15 (+s/sec). The combustion rate of the product coated with the conductive coating composition of the present invention and molded was 0.4 (an/5ec), which was ranked as self-extinguishing.

ただし燃焼率は(IIm / 5et)は自己限界指示
線方向の距離(+sa ) /自己限界指示線に炎が達
する時間(see>である。
However, the combustion rate (IIm/5et) is the distance in the direction of the self-limit indication line (+sa)/time for the flame to reach the self-limit indication line (see>).

配合組成 脂肪族系線状ウレタン樹脂    180重量部(テラ
モラフク4125(住友バイエルウレタン社製)〉° 
      ゛                  
   −。
Blend composition: Aliphatic linear urethane resin 180 parts by weight (Teramo Fuku 4125 (manufactured by Sumitomo Bayer Urethane))

−.

トリス(りυロエチル〉本スヘート (難燃剤)   
    18重量部グラファイト          
80重量部イソプロピルアルコール     33重量
部n−ブタノール         33重量部トルエ
ン            33重量部〔発明の効果〕 本発明の発泡プラスチックビーズは導電性あるいは導電
性及び難燃性を付与しているため、これを成型したもの
はこれらの特性が恒久的に付与されたものとなる。
Tris(riυloethyl) Honsuite (flame retardant)
18 parts by weight graphite
80 parts by weight Isopropyl alcohol 33 parts by weight N-butanol 33 parts by weight Toluene 33 parts by weight [Effects of the invention] Since the foamed plastic beads of the present invention have electrical conductivity or are imparted with electrical conductivity and flame retardancy, they are molded. Things become permanently endowed with these properties.

従って、成型品に単に導電性塗料あるいは難燃性塗料を
その表面に塗装したものはその特性の永続性に欠ける欠
点を有するが、本発明の発泡プラスチックビーズを成型
したものはかかる欠点がとり除かれる。
Therefore, molded products whose surfaces are simply coated with conductive paint or flame-retardant paint have the drawback that their properties are not permanent, but molded products made from the foamed plastic beads of the present invention eliminate this drawback. It will be destroyed.

従って本発明の発泡プラスチックビーズは建築分野ばか
りでなく、エレクトロニクス産業、精密機器産業の分野
での、適用範囲が広がり、これらの分野での用途の拡大
が期待できる。
Therefore, the expanded plastic beads of the present invention can be applied not only to the construction field but also to the electronics industry and precision equipment industry, and can be expected to have expanded applications in these fields.

Claims (1)

【特許請求の範囲】 1、導電性を付与したことを特徴とする発 泡プラスチックビーズ。 2、導電性及び難燃性を付与したことを特 徴とする発泡プラスチックビーズ。 3、発泡プラスチックビーズの表面に導電 性塗料を塗布することにより導電性を 付与した特許請求の範囲第1項及び第 2項記載の発泡プラスチックビーズ。 4、発泡プラスチックビーズの表面に難燃 剤を含有した導電性塗料を塗布するこ とにより導電性及び難燃性を付与した 特許請求の範囲第2項記載の発泡プラ スチックビーズ。 5、導電性塗料がアルコール系溶剤を含有 してなる特許請求の範囲第3項及び第 4項記載の発泡プラスチックビーズ。[Claims] 1. A generator characterized by imparting conductivity foam plastic beads. 2. It is characterized by having electrical conductivity and flame retardancy. Characterized by foamed plastic beads. 3. Conductive on the surface of foamed plastic beads Conductivity is achieved by applying a conductive paint. Assigned claims 1 and 1 The foamed plastic beads described in item 2. 4. Flame retardant on the surface of foamed plastic beads Applying conductive paint containing a It imparts electrical conductivity and flame retardancy. Foamed plastic according to claim 2 stick beads. 5. Conductive paint contains alcohol solvent Claims 3 and 3 consisting of The foamed plastic beads described in item 4.
JP17277585A 1985-08-05 1985-08-05 Expanded plastic bead Pending JPS6232130A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17277585A JPS6232130A (en) 1985-08-05 1985-08-05 Expanded plastic bead

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17277585A JPS6232130A (en) 1985-08-05 1985-08-05 Expanded plastic bead

Publications (1)

Publication Number Publication Date
JPS6232130A true JPS6232130A (en) 1987-02-12

Family

ID=15948109

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17277585A Pending JPS6232130A (en) 1985-08-05 1985-08-05 Expanded plastic bead

Country Status (1)

Country Link
JP (1) JPS6232130A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0356551A (en) * 1989-07-26 1991-03-12 Agency Of Ind Science & Technol Stabilizer for PVC
JPH03122015A (en) * 1989-10-04 1991-05-24 Nakayama Sekkai Kogyo Kk Chain precipitated calcium carbonate and production thereof
JPH03167237A (en) * 1989-11-28 1991-07-19 Nippon Kasei Kk Production of flame-retardant polystyrene resin foam
JPH0640717A (en) * 1987-10-31 1994-02-15 Agency Of Ind Science & Technol Planer basic calcium carbonate
JP2006117842A (en) * 2004-10-22 2006-05-11 Asahi Kasei Life & Living Corp Polyolefin resin expanded particles and in-mold molded product thereof
WO2007013791A1 (en) * 2005-07-26 2007-02-01 Ertecee B.V. Method for manufacturing a fire retardant composite and composite thus obtained
WO2007012441A3 (en) * 2005-07-26 2007-06-21 Ertecee B V Method for manufacturing a fire retardant composite and composite thus obtained
NL1033269C2 (en) * 2007-01-23 2008-07-24 Ertecee B V Aqueous gel-forming composition, e.g. as fire retardant coating to substrate, comprises aluminosilicate and organic liquid, where aluminosilicate comprises alkali metal aluminate and alkali metal silicate each having specified molar ratio
WO2008091144A3 (en) * 2007-01-23 2009-04-23 Ertecee B V A method of manufacturing a fire retardant composite, a composite and its use

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52130868A (en) * 1976-04-23 1977-11-02 Reuter Technologie Gmbh Molded conductive foam
JPS5892540A (en) * 1981-11-30 1983-06-01 Fujimori Kogyo Kk Conductive foam molding body and manufacture therefor
JPS60141732A (en) * 1983-12-28 1985-07-26 Kanegafuchi Chem Ind Co Ltd Expandable conductive styrene resin beads, foam therefrom and its manufacture

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52130868A (en) * 1976-04-23 1977-11-02 Reuter Technologie Gmbh Molded conductive foam
JPS5892540A (en) * 1981-11-30 1983-06-01 Fujimori Kogyo Kk Conductive foam molding body and manufacture therefor
JPS60141732A (en) * 1983-12-28 1985-07-26 Kanegafuchi Chem Ind Co Ltd Expandable conductive styrene resin beads, foam therefrom and its manufacture

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0640717A (en) * 1987-10-31 1994-02-15 Agency Of Ind Science & Technol Planer basic calcium carbonate
JPH0356551A (en) * 1989-07-26 1991-03-12 Agency Of Ind Science & Technol Stabilizer for PVC
JPH03122015A (en) * 1989-10-04 1991-05-24 Nakayama Sekkai Kogyo Kk Chain precipitated calcium carbonate and production thereof
JPH03167237A (en) * 1989-11-28 1991-07-19 Nippon Kasei Kk Production of flame-retardant polystyrene resin foam
JP2006117842A (en) * 2004-10-22 2006-05-11 Asahi Kasei Life & Living Corp Polyolefin resin expanded particles and in-mold molded product thereof
WO2007013791A1 (en) * 2005-07-26 2007-02-01 Ertecee B.V. Method for manufacturing a fire retardant composite and composite thus obtained
WO2007012441A3 (en) * 2005-07-26 2007-06-21 Ertecee B V Method for manufacturing a fire retardant composite and composite thus obtained
JP2009502563A (en) * 2005-07-26 2009-01-29 エルテセー・ベー・ベー Method for producing flame retardant composite material and composite material obtained thereby
US7998570B2 (en) 2005-07-26 2011-08-16 Ertecee B.V. Method for manufacturing a fire retardant composite and composite thus obtained
AU2006274265B2 (en) * 2005-07-26 2012-01-19 Ertecee B.V. Method for manufacturing a fire retardant composite and composite thus obtained
NL1033269C2 (en) * 2007-01-23 2008-07-24 Ertecee B V Aqueous gel-forming composition, e.g. as fire retardant coating to substrate, comprises aluminosilicate and organic liquid, where aluminosilicate comprises alkali metal aluminate and alkali metal silicate each having specified molar ratio
WO2008091144A3 (en) * 2007-01-23 2009-04-23 Ertecee B V A method of manufacturing a fire retardant composite, a composite and its use

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