JP4646089B2 - Antistatic resin composition - Google Patents
Antistatic resin composition Download PDFInfo
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- JP4646089B2 JP4646089B2 JP2000247375A JP2000247375A JP4646089B2 JP 4646089 B2 JP4646089 B2 JP 4646089B2 JP 2000247375 A JP2000247375 A JP 2000247375A JP 2000247375 A JP2000247375 A JP 2000247375A JP 4646089 B2 JP4646089 B2 JP 4646089B2
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- Prior art keywords
- fatty acid
- resin
- weight
- caprolactone
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Description
【0001】
【発明の属する技術分野】
本発明は帯電防止性樹脂組成物剤に関する。
【0002】
【従来の技術及び発明が解決しようとする課題】
合成樹脂は静電気が発生して帯電し易く、合成樹脂製品表面に静電気が帯電すると、不快な放電を生じたり、表面にゴミが付着して製品価値を著しく低下させるという問題がある。また、合成樹脂製品の製造工程等において発生する静電気によるスパークは、火災や爆発の原因となるという問題がある。
【0003】
このような問題を解決するために、合成樹脂成型品、合成樹脂フィルムやシート、発泡用合成樹脂粒子等の表面に帯電防止剤を塗布したり、合成樹脂中に帯電防止剤を練り込むことにより、合成樹脂製品表面の固有抵抗を低下させて静電気の発生や帯電を防止する方法が採用されている。
【0004】
一般に汎用の合成樹脂製品は、ゴミとして埋め立てて廃棄した場合に微生物によって分解されることがほとんどないため、埋め立て処分場の確保が問題となっている。また焼却処理する場合には、高い燃焼エネルギーによる焼却炉破損の問題や、焼却時に有害な廃ガスが生じる虞れがあることが近年問題となっている。このような従来の汎用的な合成樹脂にかわり、自然環境下で微生物によって容易に分解される特性を有する生分解性樹脂が、環境保護の上から注目され、その利用が検討されている。
【0005】
生分解性樹脂として知られているカプロラクトン系樹脂、乳酸系樹脂、澱粉系樹脂等のうち、カプロラクトン系樹脂は乳酸系樹脂等と比べると帯電性が少ない樹脂ではあるが、成形体やシート、フィルム、発泡体、繊維等の製品になると、摩擦による帯電を生じ易くなるが、カプロラクトン系樹脂を一般の合成樹脂に用いられている帯電防止剤で処理した場合、帯電防止効果が不十分であったり樹脂が着色して商品価値を低下させるという問題があり、未だカプロラクトン系樹脂に適切な帯電防止性を付与せしめるにいたっていない。
【0006】
本発明は上記の点に鑑みなされたもので、カプロラクトン系樹脂よりなる帯電防止性樹脂組成物を提供することを目的とする。
【0007】
【課題を解決するための手段】
即ち、本発明の帯電防止性樹脂組成物は、カプロラクトン系樹脂中に、グリセリンと脂肪酸とのモノエステルであるグリセリン脂肪酸エステルと、脂肪酸ジエタノールアミドとを、グリセリン脂肪酸エステル:脂肪酸ジエタノールアミド=40:60〜80:20の重量比で混合した非イオン系帯電防止剤を含有することを特徴とする。
【0008】
【発明の実施の形態】
本発明の帯電防止性樹脂組成物におけるカプロラクトン系樹脂としては、ε−カプロラクトン、4−メチルカプロラクトン、3,5,5−トリメチルカプロラクトン、3,3,5−トリメチルカプロラクトン、β−プロピオンラクトン、γ−ブチロラクトン、δ−バレロラクトン、エナントラクトンの単独重合体や、これらの2種以上の共重合体が挙げられる。これらのカプロラクトンは2種以上を混合して用いることができる。これらカプロラクトンのなかでも、ポリ−ε−カプロラクトンが好ましい。
【0009】
本発明の帯電防止性樹脂組成物中に含まれる、非イオン系帯電防止剤としてのグリセリン脂肪酸エステルとは、グリセリンと脂肪酸とのモノエステルをいう。このようなグリセリン脂肪酸エステルとしては、例えば、グリセリンモノベヘン酸エステル、グリセリンモノステアリン酸エステル、グリセリンモノオレイン酸エステル、グリセリンモノパルミチン酸エステル、グリセリンモノミリスチン酸エステル、グリセリンモノラウリン酸エステル、グリセリンモノカプリン酸エステル等が挙げられる。
【0010】
本発明の帯電防止性樹脂組成物は、上記グリセリン脂肪酸エステルと脂肪酸ジエタノールアミドとを、グリセリン脂肪酸エステル:脂肪酸ジエタノールアミド=40:60〜80:20の重量比で混合した非イオン系帯電防止剤を含有する。
【0011】
上記脂肪酸ジエタノールアミドとしては、例えばラウリン酸ジエタノールアミド、パルミチン酸ジエタノールアミド、ミリスチン酸ジエタノールアミド、ステアリン酸ジエタノールアミド、オレイン酸ジエタノールアミド等が挙げられるが、脂肪酸ジエタノールアミドとしてはラウリン酸ジエタノールアミドが好ましい。
【0012】
本発明の組成物においてグリセリン脂肪酸エステルと脂肪酸ジエタノールアミドとの混合物よりなる非イオン系界面活性剤の添加量は、充分な帯電防止効果が得られ、また樹脂物性が低下したり樹脂の流動性が増加しない範囲とすることが好ましい。通常、カプロラクトン系樹脂100重量部当たり0.1〜15重量部、特に1〜10重量部添加することが好ましい。
【0013】
本発明の樹脂組成物中には、必要に応じて着色剤、滑剤、安定剤、難燃剤等の添加物を配合することができる。
【0014】
本発明の帯電防止生分解性樹脂組成物は、各種容器等の成形体、シートやフィルム、発泡体、繊維等の原料として好適に利用することができる。
【0015】
【実施例】
以下、実施例を挙げて本発明を更に詳細に説明する。
【0016】
実施例1〜4
カプロラクトン樹脂(セルグリーンPHB−02:ダイセル化学工業株式会社製)100重量部当たり、表1に示す非イオン系帯電防止剤を同表に示す量添加して押出機内で混練した後、押出機より押出して縦65mm、横45mm、厚さ2mmのプレートを成形し、このプレートの表面抵抗値、帯電圧半減期、及び目視によりプレートの着色度合いを測定した。結果を、帯電防止剤未添加のカプロラクトン樹脂の場合の測定結果とともに表2に示す。
【0017】
比較例1
実施例1〜4で用いたと同様のカプロラクトン樹脂100重量部当たり、帯電防止剤としてアルキルスルホン酸ナトリウムを2重量部添加した他は実施例1〜4と同様にしてプレートを押出成形し、表面抵抗値、帯電圧半減期、プレートの着色度合いを測定した。結果を表2にあわせて示す。
【0018】
【表1】
【0019】
【表2】
【0020】
※1:プレートの着色は、帯電防止剤未添加のプレートの色と目視比較し、
○・・変わりなし。
△・・やや着色している。
×・・着色している。
として評価した。
【0021】
比較例2
実施例1〜4で用いたと同様のカプロラクトン樹脂100重量部当たり、非イオン系帯電防止剤としてソルビタンモノラウリン酸エステルを2重量部添加した他は、実施例1〜4と同様にしてプレートを押出成形し、このプレートの表面抵抗値、帯電圧半減期、プレートの着色度合いを測定した。結果を表2にあわせて示す。
【0022】
比較例3
実施例1〜4で用いたと同様のカプロラクトン樹脂100重量部当たり、ラウリルアミンEO2モル付加体を2重量部添加した他は、実施例1〜4と同様にしてプレートを押出成形し、このプレートの表面抵抗値、帯電圧半減期、プレートの着色度合いを測定した。結果を表2にあわせて示す。
【0023】
比較例4
実施例1〜4で用いたと同様のカプロラクトン樹脂100重量部当たり、グリセリンモノステアリン酸エステル30重量部とラウリルアミンEO2モル付加体70重量部の混合物を2重量部添加した他は、実施例1〜4と同様にしてプレートを押出成形し、このプレートの表面抵抗値、帯電圧半減期、プレートの着色度合いを測定した。結果を表2にあわせて示す。
【0024】
比較例5
実施例1〜4で用いたと同様のカプロラクトン樹脂100重量部当たり、ラウリン酸ジエタノールアミドを2重量部添加した他は、実施例1〜4と同様にしてプレートを押出成形し、このプレートの表面抵抗値、帯電圧半減期、プレートの着色度合いを測定した。結果を表2にあわせて示す。
【0025】
比較例6
実施例1〜4で用いたと同様のカプロラクトン樹脂100重量部当たり、グリセリンモノステアリン酸エステル30重量部とラウリン酸ジエタノールアミド70重量部の混合物を2重量部添加した他は、実施例1〜4と同様にしてプレートを押出成形し、このプレートの表面抵抗値、帯電圧半減期、プレートの着色度合いを測定した。結果を表2にあわせて示す。
【0026】
【発明の効果】
本発明の帯電防止性樹脂組成物は、帯電防止性に優れるとともに生分解性に優れ、本発明の樹脂組成物を用いた容器等の成形品や、フィルム、シート、発泡体、繊維等の製品を、使用後に廃棄物として廃棄する場合、地中等に埋設する等の処理を行うだけで微生物によって容易に分解されるため、環境汚染を生じる虞れがない等の効果を奏する。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an antistatic resin composition agent.
[0002]
[Prior art and problems to be solved by the invention]
Synthetic resins are easily charged due to the generation of static electricity. When static electricity is charged on the surface of a synthetic resin product, there is a problem that unpleasant discharge occurs or dust adheres to the surface and the product value is significantly reduced. Moreover, there is a problem that sparks due to static electricity generated in the manufacturing process of synthetic resin products cause fires and explosions.
[0003]
In order to solve such problems, an antistatic agent is applied to the surface of a synthetic resin molded product, a synthetic resin film or sheet, a synthetic resin particle for foaming, or the antistatic agent is kneaded into the synthetic resin. A method of preventing the generation of static electricity and charging by reducing the specific resistance of the surface of the synthetic resin product is employed.
[0004]
In general, general-purpose synthetic resin products are hardly decomposed by microorganisms when landfilled and disposed of as garbage, and securing a landfill disposal site is a problem. Further, in the case of incineration treatment, there are problems in recent years that there is a problem of damage to the incinerator due to high combustion energy and that there is a possibility that harmful waste gas may be generated during incineration. In place of such conventional general-purpose synthetic resins, biodegradable resins having the property of being easily decomposed by microorganisms in a natural environment have attracted attention from the viewpoint of environmental protection, and their use has been studied.
[0005]
Among caprolactone-based resins, lactic acid-based resins, and starch-based resins known as biodegradable resins, caprolactone-based resins are resins that have less chargeability than lactic acid-based resins. When it becomes products such as foams and fibers, it tends to be charged due to friction. However, when the caprolactone resin is treated with an antistatic agent used in general synthetic resins, the antistatic effect may be insufficient. There is a problem that the resin is colored to lower the commercial value, and it has not yet been possible to impart appropriate antistatic properties to the caprolactone-based resin.
[0006]
This invention is made | formed in view of said point, and it aims at providing the antistatic resin composition which consists of a caprolactone-type resin.
[0007]
[Means for Solving the Problems]
That is, in the antistatic resin composition of the present invention, glycerin fatty acid ester, which is a monoester of glycerin and fatty acid , and fatty acid diethanolamide in caprolactone-based resin , glycerin fatty acid ester: fatty acid diethanolamide = 40: 60. It contains a nonionic antistatic agent mixed in a weight ratio of ˜80: 20 .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Examples of the caprolactone-based resin in the antistatic resin composition of the present invention include ε-caprolactone, 4-methylcaprolactone, 3,5,5-trimethylcaprolactone, 3,3,5-trimethylcaprolactone, β-propionlactone, γ- Examples thereof include homopolymers of butyrolactone, δ-valerolactone, and enanthlactone, and copolymers of two or more of these. These caprolactones can be used as a mixture of two or more. Of these caprolactones, poly-ε-caprolactone is preferred.
[0009]
Antistatic contained in the resin composition of the present invention, the glycerin fatty acid ester as a nonionic antistatic agent, refers to a monoester of glycerin and fatty acids. Examples of such glycerol fatty acid esters include glycerol monobehenate, glycerol monostearate, glycerol monooleate, glycerol monopalmitate, glycerol monomyristate, glycerol monolaurate, and glycerol monocapric acid. Este Le, and the like.
[0010]
The antistatic resin composition of the present invention comprises a nonionic antistatic agent obtained by mixing the glycerin fatty acid ester and the fatty acid diethanolamide at a weight ratio of glycerin fatty acid ester: fatty acid diethanolamide = 40: 60 to 80:20. Contains .
[0011]
Examples of the fatty acid diethanol amides, such as lauric acid diethanolamide, palmitic acid diethanolamide, myristic acid diethanolamide, stearic acid diethanolamide, although acids such as oleic acid diethanol amide Ru mentioned, lauric acid diethanolamide as fatty acid diethanolamide It is not preferred.
[0012]
In the composition of the present invention, the addition amount of the nonionic surfactant comprising a mixture of glycerin fatty acid ester and fatty acid diethanolamide can provide a sufficient antistatic effect, and the resin physical properties can be lowered or the resin fluidity can be reduced. It is preferable that the range does not increase. Usually, it is preferable to add 0.1 to 15 parts by weight, particularly 1 to 10 parts by weight per 100 parts by weight of caprolactone-based resin.
[0013]
In the resin composition of the present invention, additives such as a colorant, a lubricant, a stabilizer, and a flame retardant can be blended as necessary.
[0014]
The antistatic biodegradable resin composition of the present invention can be suitably used as a raw material for molded articles such as various containers, sheets, films, foams, fibers and the like.
[0015]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples.
[0016]
Examples 1 to 4
A caprolactone resin (Cell Green PHB-02: manufactured by Daicel Chemical Industries, Ltd.) per 100 parts by weight of the nonionic antistatic agent shown in Table 1 was added in an amount shown in the table and kneaded in the extruder. A plate having a length of 65 mm, a width of 45 mm, and a thickness of 2 mm was formed by extrusion, and the surface resistance value, the charged voltage half-life, and the degree of coloring of the plate were measured visually. The results are shown in Table 2 together with the measurement results for the caprolactone resin to which no antistatic agent was added.
[0017]
Comparative Example 1
Except that 2 parts by weight of sodium alkyl sulfonate was added as an antistatic agent per 100 parts by weight of the same caprolactone resin as used in Examples 1 to 4 , the plate was extruded in the same manner as in Examples 1 to 4 to obtain surface resistance. The value, the charged half-life, and the degree of coloration of the plate were measured. The results are shown in Table 2.
[0018]
[Table 1]
[0019]
[Table 2]
[0020]
* 1: The color of the plate is visually compared with the color of the plate with no antistatic agent added.
○ ・ ・ No change.
△ ・ ・ Slightly colored.
× ·· Colored.
As evaluated.
[0021]
Comparative Example 2
Extruded plates in the same manner as in Examples 1 to 4 except that 2 parts by weight of sorbitan monolaurate as a nonionic antistatic agent was added per 100 parts by weight of the same caprolactone resin as used in Examples 1 to 4. The surface resistance, the half-life of the charged voltage, and the degree of coloration of the plate were measured. The results are shown in Table 2.
[0022]
Comparative Example 3
Except that 2 parts by weight of laurylamine EO 2 mol adduct was added per 100 parts by weight of the same caprolactone resin as used in Examples 1 to 4 , the plate was extruded in the same manner as in Examples 1 to 4 . The surface resistance value, the charged voltage half-life, and the degree of coloration of the plate were measured. The results are shown in Table 2.
[0023]
Comparative Example 4
Except for adding 2 parts by weight of a mixture of 30 parts by weight of glycerin monostearate and 70 parts by weight of laurylamine EO 2 mol adduct per 100 parts by weight of the same caprolactone resin as used in Examples 1 to 4 , Examples 1 to 4 were used. The plate was extruded in the same manner as in No. 4, and the surface resistance value, the charged voltage half-life, and the degree of coloration of the plate were measured. The results are shown in Table 2.
[0024]
Comparative Example 5
Except that 2 parts by weight of lauric acid diethanolamide was added per 100 parts by weight of the same caprolactone resin as used in Examples 1 to 4 , the plate was extruded in the same manner as in Examples 1 to 4, and the surface resistance of this plate was The value, the charged half-life, and the degree of coloration of the plate were measured. The results are shown in Table 2.
[0025]
Comparative Example 6
Examples 1 to 4 except that 2 parts by weight of a mixture of 30 parts by weight of glycerin monostearate and 70 parts by weight of lauric acid diethanolamide was added per 100 parts by weight of the same caprolactone resin as used in Examples 1 to 4 . In the same manner, a plate was extruded, and the surface resistance value, charged half-life, and degree of coloring of the plate were measured. The results are shown in Table 2.
[0026]
【The invention's effect】
The antistatic resin composition of the present invention has excellent antistatic properties and excellent biodegradability, and is a molded product such as a container using the resin composition of the present invention, or a product such as a film, sheet, foam, or fiber. When it is discarded as waste after use, it can be easily decomposed by microorganisms simply by burying it in the ground or the like.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000247375A JP4646089B2 (en) | 2000-08-17 | 2000-08-17 | Antistatic resin composition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000247375A JP4646089B2 (en) | 2000-08-17 | 2000-08-17 | Antistatic resin composition |
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| Publication Number | Publication Date |
|---|---|
| JP2002060603A JP2002060603A (en) | 2002-02-26 |
| JP4646089B2 true JP4646089B2 (en) | 2011-03-09 |
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| JP2000247375A Expired - Lifetime JP4646089B2 (en) | 2000-08-17 | 2000-08-17 | Antistatic resin composition |
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| WO2005103160A1 (en) | 2004-04-26 | 2005-11-03 | Toho Chemical Industry Co., Ltd. | Biodegradable resin composition |
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| JPH1036650A (en) * | 1996-07-19 | 1998-02-10 | Mitsui Petrochem Ind Ltd | Polymer composition |
| JPH10158484A (en) * | 1996-11-28 | 1998-06-16 | Shin Etsu Chem Co Ltd | Biodegradable polymer composition having antistatic properties |
| JPH11279391A (en) * | 1998-03-31 | 1999-10-12 | Japan Atom Energy Res Inst | Degradable thick container |
| JP3222431B2 (en) * | 1999-02-12 | 2001-10-29 | 三菱樹脂株式会社 | Multilayer polyester sheet |
| JP2001146547A (en) * | 1999-11-19 | 2001-05-29 | Riken Vitamin Co Ltd | Antistatic agent composition and saturated polyester resin composition |
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