JP4651859B2 - Anti-fogging agent - Google Patents

Anti-fogging agent Download PDF

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JP4651859B2
JP4651859B2 JP2001160123A JP2001160123A JP4651859B2 JP 4651859 B2 JP4651859 B2 JP 4651859B2 JP 2001160123 A JP2001160123 A JP 2001160123A JP 2001160123 A JP2001160123 A JP 2001160123A JP 4651859 B2 JP4651859 B2 JP 4651859B2
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Prior art keywords
antifogging
fatty acid
carbon atoms
film
weight
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JP2002348560A (en
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伸也 後藤
晃 武中
芳治 亀井
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Kao Corp
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Kao Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、熱可塑性樹脂に優れた防曇性能を付与することができる、防曇剤、防曇剤組成物及びそれらを含有する防曇性樹脂組成物に関する。
【0002】
【従来の技術及び発明が解決しようとする課題】
熱可塑性樹脂は、その優れた性質のため現在幅広い分野で使用され、例えば農業用フィルム、ラップ用フィルム、シート類等に成形されて用いられている。しかし、元来合成樹脂表面は疎水性であるため、成形された製品を使用するとき、温度や湿度等の条件によっては、吸着もしくは凝集した水分が微細な水滴として表面を覆い、曇りを生ずるため種々の不都合をきたしている。
【0003】
例えば、ポリオレフィン樹脂製フィルムを農業用ハウス又はトンネル栽培などに利用する場合、地表あるいは作物から蒸発した水分が、微細な水滴としてフィルム内表面に凝集し、作物の生育を遅くしたり、水滴が作物に落下することで病害が発生する原因となる。また、ラップ用フィルムでは水滴により陳列中の内容物が見えなくなり、商品価値を著しく低下させてしまう。
【0004】
これらの欠点を防止するために、現在最も多く用いられている方法としては、合成樹脂製品を成形する際に、防曇剤を配合して練り込む方法か、あるいは、成形した後、その表面に防曇剤を塗布する方法がある。これらの方法で用いられる防曇剤としては、ソルビタン高級脂肪酸エステル(特公昭38−6572号)及びそれらの酸化エチレン付加物(特公昭55−9431号)、グリセリン脂肪酸エステル(特公昭38−4174号)、ポリグリセリン脂肪酸エステル(特公昭43−8605号)等の多価アルコール高級脂肪酸エステルが挙げられる。しかし、これらの防曇剤は、防曇レベル(低温防曇性、初期防曇性)と防曇持続性の両立が困難であり、気温の差が大きい場所や、かなり低温となる場合では、防曇性能が不足する問題があった。
【0005】
その問題点を解決すべき防曇剤としては、ポリオキシエチレンアルキルアミン(特公昭44−15184号)、その高級脂肪酸エステル(特公昭62−33256号)及びこれらと多価アルコール脂肪酸エステルの配合物(特開昭48−104638号)等がある。後者の2種の防曇剤は、防曇レベル及び持続性ともに良好であるが、フィルム表面でブルーミング現象が起こって透明性を著しく低下させ、使用に耐えうるものではない。
【0006】
本発明の課題は、防曇レベル及び防曇持続性に優れ、且つフィルム等の透明性を低下させない防曇剤、防曇剤組成物及び防曇性樹脂組成物を提供することにある。
【0007】
【課題を解決するための手段】
本発明は、式(1)で表される化合物(以下化合物(1)という)からなる防曇剤、化合物(1)と、多価アルコール部分脂肪酸(脂肪酸の炭素数12〜22)エステル及びそのアルキレンオキサイド付加物から選ばれる1種以上を含有する防曇剤組成物、及び熱可塑性樹脂に、これらの防曇剤又は防曇剤組成物を配合してなる防曇性樹脂組成物を提供する。
【0008】
【化2】

Figure 0004651859
【0009】
(式中、R1CO-は炭素数6〜24の水酸基を有していてもよい飽和又は不飽和のアシル基、R2は炭素数1〜3の直鎖又は分岐鎖のアルキル基、R3は炭素数1〜6の直鎖又は分岐鎖のアルキレン基あるいは炭素数2〜6の直鎖又は分岐鎖のアルケニレン基を示す。)
【0010】
【発明の実施の形態】
本発明に用いられる化合物(1)において、R1CO-は上記のようなアシル基を示すが、炭素数8〜18、更に炭素数12〜18の飽和又は不飽和アシル基が好ましい。具体的にはオクタン酸、デカン酸、ドデカン酸、テトラデカン酸、ヘキサデカン酸、オクタデカン酸、ドコサン酸、リノール酸、2−エチルヘキサン酸、2−オクチルウンデカン酸、イソステアリン酸、オレイン酸、ヤシ脂肪酸、パーム核油脂肪酸、パーム油脂肪酸、牛脂脂肪酸等から誘導されるアシル基である。これらのアシル基の中でも、特に炭素数12〜14の脂肪酸から誘導されるアシル基が好ましい。
【0011】
また、R2は炭素数1〜3の直鎖又は分岐鎖のアルキル基であり、好ましくはメチル基、エチル基、特に好ましくはメチル基である。さらにR3は炭素数1〜6の直鎖又は分岐鎖のアルキレン基あるいは炭素数2〜6の直鎖又は分岐鎖のアルケニレン基であり、好ましくは炭素数2もしくは3、特に炭素数2の直鎖又は分岐鎖のアルキレン基である。
【0012】
化合物(1)の具体例として、例えば、N−メチル−N−エタノールオクタン酸アミド、N−メチル−N−エタノールデカン酸アミド、N−メチル−N−エタノールドデカン酸アミド、N−メチル−N−エタノールテトラデカン酸アミド、N−メチル−N−エタノールヘキサデカン酸アミド、N−メチル−N−エタノールオクタデカン酸アミド、N−メチル−N−エタノールヤシ脂肪酸アミド、N−メチル−N−エタノールパーム核油脂肪酸アミド、N−エチル−N−イソプロパノールドデカン酸アミド、N−エチル−N−イソプロパノールオレイン酸アミド、N−エチル−N−イソプロパノールイソステアリン酸アミド等が挙げられる。
【0013】
化合物(1)の製造法は特に限定されず、例えば、脂肪酸又は脂肪酸低級アルコールエステルとアルカノールアミンとの脱水又は脱アルコール反応、脂肪酸ハロゲン化物とアルカノールアミンのアルカリ触媒下での反応、あるいは油脂とアルカノールアミンとのエステル−アミド交換反応等を用いて製造することができる。
【0014】
本発明の防曇剤組成物中の化合物(1)の配合量は、10〜100重量%が好ましく、10〜90重量%が更に好ましく、15〜50重量%が特に好ましい。
【0015】
本発明の防曇剤組成物は、化合物(1)と、更に多価アルコール部分脂肪酸(脂肪酸の炭素数12〜22)エステル及びそのアルキレンオキサイド付加物から選ばれる1種以上を配合することが、防曇持続性の観点から好ましい。
【0016】
本発明に用いることができる多価アルコール部分脂肪酸エステルは、これを構成する多価アルコールが、ソルビタン、ソルビトール、グリセリン、ポリグリセリン、ペンタエリスリトール、ジペンタエリスリトール、ショ糖、エチレングリコール、ポリエチレングリコール、プロピレングリコール、ポリプロピレングリコール、ネオペンチルグリコール、1,4−ブタンジオール、1,6−ヘキサンジオール、トリメチロールプロパン、N,N−ビスヒドロキシアルキルアミンから選ばれるものが好ましいが、その中でもソルビタン、ソルビトール、グリセリン、ポリグリセリンが防曇持続性の点で好ましい。
【0017】
また、当該エステルを構成する脂肪酸は、炭素数12〜22、好ましくは12〜18の飽和又は不飽和脂肪酸であり、これらは単独又は2種以上の組み合わせで使用することができる。なお、多価アルコールの部分脂肪酸エステルとは、下記式で表されるエステル化度が1未満、好ましくは0.5未満のものである。
【0018】
【数1】
Figure 0004651859
【0019】
本発明に用いることができる上記多価アルコール部分脂肪酸エステルのアルキレンオキサイド付加物としては、エチレンオキサイド付加物、プロピレンオキサイド付加物が好ましく、それらの平均付加モル数は、多価アルコールの水酸基1モルに対し0.3〜20モルが好ましく、0.5〜10モルが更に好ましい。
【0020】
本発明の防曇剤組成物中の多価アルコール部分脂肪酸エステル及びそのアルキレンオキサイド付加物から選ばれる1種以上の配合量は、10〜90重量%が好ましく、50〜85重量%が更に好ましい。
【0021】
本発明の防曇剤組成物中の、化合物(1)((a)成分という)と、多価アルコール部分脂肪酸(脂肪酸の炭素数12〜22)エステル及びそのアルキレンオキサイド付加物((b)成分という)の配合割合は、重量比で、(a)成分/(b)成分=90/10〜10/90であることが防曇持続性の観点から好ましく、特に50/50〜15/85であることが好ましい。
【0022】
本発明の防曇剤及び防曇剤組成物は、各種の熱可塑性樹脂に配合して、優れた防曇性を有する防曇性樹脂組成物を得ることができる。本発明が対象とする熱可塑性樹脂としては、エチレン、プロピレン等のオレフィンの単独重合体又は共重合体、塩化ビニル樹脂等が挙げられ、ポリエチレン、エチレン−酢酸ビニル共重合体、ポリプロピレン等のポリオレフィン系樹脂が、その効果が顕著に現れるので好ましい。また、2層以上からなる多層合成樹脂フィルムへの応用も可能で、多層合成樹脂フィルムとして、酢酸ビニルの割合が異なるエチレン−酢酸ビニル共重合体(EVA)を用いたEVA−EVA−EVAの3層フィルム、ポリエチレン(LDPE)−EVA−LDPEの3層フィルム、直鎖状低密度ポリエチレン(LLDPE)−EVA−LLDPEの3層フィルム等が挙げられる。これらに対する本発明の防曇剤又は防曇剤組成物の添加は、内層、外層に関わらず、任意の層に添加してよく、1層に限らず2層以上の層に添加しても良い。
【0023】
本発明の防曇性樹脂組成物中の防曇剤組成物の配合量は、熱可塑性樹脂100重量部に対し、0.5〜5重量部が好ましく、0.5〜3重量部が更に好ましく、0.5〜2重量部が特に好ましい。
【0024】
本発明の防曇性樹脂組成物中の化合物(1)の配合量は、熱可塑性樹脂100重量部に対し、0.3〜5重量部が好ましく、0.4〜3重量部が更に好ましい。また多価アルコール部分脂肪酸エステル及びそのアルキレンオキサイド付加物から選ばれる1種以上の配合量は、熱可塑性樹脂100重量部に対し、0.1〜4重量部が好ましく、0.2〜3重量部が更に好ましい。
【0025】
本発明の防曇性樹脂組成物中には、本発明の効果を阻害しない範囲で他の添加剤を配合することができる。具体的にはエチレン−プロピレン系ゴム、エチレン−ブテン系ゴム等のオレフィン系ゴム;タルク等の無機フィラー;有機系、無機系の顔料;フェノール系、リン系等の酸化防止剤;アミン系、トリアゾール系等の光安定剤;有機系、無機系の造核剤;滑剤;金属不活性化剤;分子量調整剤;抗菌剤;ブロッキング防止剤等が挙げられる。
【0026】
本発明の防曇性樹脂組成物を成形体とする場合は、通常の方法によって製造することができる。例えば粉末の熱可塑性樹脂に、化合物(1)と必要により添加される多価アルコール部分脂肪酸エステル又はそのアルキレンオキサイド付加物、他の機能付与剤等とをヘンシェルミキサー等で混合後、一軸又は二軸押出機にてペレット化する。このようにして得られたペレットを押出成形を行い、目的とするフィルムやシート等の成形物を得ることができる。また、化合物(1)の樹脂への添加方法に制限はなく、あらかじめ作成したマスターバッチにより添加しても同様の優れた効果を得ることができる。
【0027】
【実施例】
実施例1〜4及び比較例1〜2
あらかじめ粉砕にて細かくしたエチレン−酢酸ビニル(酢酸ビニル含量5%)共重合樹脂(EVA)100重量部に対し、防曇剤として表1に示す化合物(1)、及び多価アルコール部分脂肪酸エステル等を表1に示す量を配合し、ヘンシェルミキサーにて混合して樹脂組成物を得た。この樹脂組成物を、210℃に設定した二軸押出機を用いてペレタイズし、その後230℃に設定したT−ダイ製膜装置により厚さ50μmのフィルムを作成した。
【0028】
得られたフィルムについて、下記方法で防曇持続性、低温防曇性及び透明性を評価した。結果を表1に示す。
【0029】
<防曇持続性>
フィルムを用いて蓋状に貼った200ccサンプル瓶に水50ccを入れ、室温5℃、水温40℃に保ち、1日、7日及び14日後の防曇性を下記基準で評価した。なおフィルムの湯気循環性を上げるため、各サンプル瓶は、若干傾けてセットした。
◎:フィルム全面が均一に濡れ、はじき全くなし
○:フィルム全面がほぼ均一に濡れているが、僅かにはじき箇所あり
△:フィルム評価部の20〜50%にはじき箇所認められる
×:フィルム評価部の50〜100%にはじき箇所認められる
<低温防曇性>
10cm×20cm×5cmのトレーを用い、中に縦に二分したキュウリを入れる。テスト用に作成したフィルムで上部に蓋をし、完全に目貼りした後、5℃の冷蔵庫に入れ、1時間及び24時間後の防曇性を観察し、下記基準で評価した。
◎:フィルムに水滴が見えず、中身がよく見える
○:中身がよく見えるものの、フィルムに僅かに水滴が見える
△:フィルムに付着する水滴が細かくなり、中身が見えずらくなる
×:フィルムが細かい水滴で白く見え、中身が確認できない
<透明性>
フィルム表面での防曇剤によるブルーミング現象の有無、即ち透明性を評価するために、フィルムを40℃で2週間処理し、ヘイズメーターでフィルムの濁度を測定した。これから求められた透明性のランクを下記の5段階で示した。
◎:まったく白化が認められない
○:ごくわずかにしか白化が認められない
△:少し白化が認められる
×:明らかに白化が認められる
××:不透明である
【0030】
【表1】
Figure 0004651859
【0031】
注)
*1 MELAD:N−メチル−N−エタノールラウリン酸アミド
*2 MESAD:N−メチル−N−エタノールステアリン酸アミド
*3 ソルビタンモノステアレート:花王(株)製レオドールSP−S10
*4 ジグリセリンモノオレート:花王(株)製サンスルーザー4120
実施例5〜7及び比較例3〜4
あらかじめ粉砕にて細かくしたMFR(JIS-K7210、230℃、2.16kg荷重)が2g/10分のランダムポリプロピレン(PP)100重量部に対し、防曇剤として表2に示す化合物(1)、及び多価アルコール部分脂肪酸エステル等を表2に示す量を配合し、ヘンシェルミキサーにて混合して樹脂組成物を得た。この樹脂組成物を、210℃に設定した二軸押出機を用いてペレタイズし、その後230℃に設定したT−ダイ加工機により、厚さ1mmのシートを作成した。
【0032】
得られたシートについて、防曇持続性、低温防曇性及び透明性を、上記の評価法において、フィルムの代わりにシートを用いる以外は同様の方法で評価した。
結果を表2に示す。
【0033】
【表2】
Figure 0004651859
【0034】
表中の*1〜*4は表1と同じ
【0035】
【発明の効果】
本発明の防曇性樹脂組成物は、防曇レベル(低温防曇性、初期防曇性)と防曇持続性に優れ、且つ透明性にも優れている。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an antifogging agent, an antifogging agent composition and an antifogging resin composition containing them, which can impart excellent antifogging performance to a thermoplastic resin.
[0002]
[Prior art and problems to be solved by the invention]
Thermoplastic resins are currently used in a wide range of fields because of their superior properties, and are used, for example, after being formed into agricultural films, wrapping films, sheets and the like. However, since the surface of synthetic resin is originally hydrophobic, depending on conditions such as temperature and humidity, moisture that has been adsorbed or agglomerated may cover the surface as fine water droplets and cause fogging. There are various inconveniences.
[0003]
For example, when a polyolefin resin film is used for agricultural house or tunnel cultivation, water evaporated from the ground surface or crops aggregates on the inner surface of the film as fine water droplets, slowing the growth of the crops, Falling into the area will cause disease. Further, in the wrapping film, the contents being displayed cannot be seen due to water droplets, and the commercial value is significantly reduced.
[0004]
In order to prevent these drawbacks, the most commonly used method at present is a method of blending and kneading an antifogging agent when molding a synthetic resin product, or after molding it on the surface. There is a method of applying an antifogging agent. Antifogging agents used in these methods include sorbitan higher fatty acid esters (Japanese Patent Publication No. 38-6572) and their ethylene oxide adducts (Japanese Patent Publication No. 55-9431), glycerin fatty acid esters (Japanese Patent Publication No. 38-4174). ) And polyglycerin fatty acid esters (Japanese Patent Publication No. 43-8605). However, these anti-fogging agents are difficult to achieve both the anti-fogging level (low-temperature anti-fogging property and initial anti-fogging property) and anti-fogging sustainability. There was a problem of insufficient anti-fogging performance.
[0005]
Anti-fogging agents that should solve the problem include polyoxyethylene alkylamine (Japanese Patent Publication No. 44-15184), higher fatty acid esters thereof (Japanese Patent Publication No. Sho 62-33256), and blends thereof with polyhydric alcohol fatty acid esters. (Japanese Patent Laid-Open No. 48-104638). The latter two types of antifogging agents have good antifogging levels and sustainability, but blooming phenomenon occurs on the film surface, and the transparency is remarkably lowered, so that they cannot be used.
[0006]
An object of the present invention is to provide an antifogging agent, an antifogging agent composition and an antifogging resin composition which are excellent in antifogging level and antifogging sustainability and do not deteriorate transparency of a film or the like.
[0007]
[Means for Solving the Problems]
The present invention relates to an antifogging agent comprising a compound represented by formula (1) (hereinafter referred to as compound (1)), compound (1), polyhydric alcohol partial fatty acid (fatty acid carbon number 12 to 22) ester, and its Provided is an antifogging agent composition containing at least one selected from alkylene oxide adducts and an antifogging resin composition obtained by blending these antifogging agents or antifogging agent compositions with a thermoplastic resin. .
[0008]
[Chemical 2]
Figure 0004651859
[0009]
(In the formula, R 1 CO- is a saturated or unsaturated acyl group optionally having a hydroxyl group having 6 to 24 carbon atoms, R 2 is a linear or branched alkyl group having 1 to 3 carbon atoms, R 3 represents a linear or branched alkylene group having 1 to 6 carbon atoms or a linear or branched alkenylene group having 2 to 6 carbon atoms.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
In the compound (1) used in the present invention, R 1 CO— represents an acyl group as described above, and a saturated or unsaturated acyl group having 8 to 18 carbon atoms and more preferably 12 to 18 carbon atoms is preferable. Specifically, octanoic acid, decanoic acid, dodecanoic acid, tetradecanoic acid, hexadecanoic acid, octadecanoic acid, docosanoic acid, linoleic acid, 2-ethylhexanoic acid, 2-octylundecanoic acid, isostearic acid, oleic acid, coconut fatty acid, palm It is an acyl group derived from nuclear oil fatty acid, palm oil fatty acid, beef tallow fatty acid and the like. Among these acyl groups, an acyl group derived from a fatty acid having 12 to 14 carbon atoms is particularly preferable.
[0011]
R 2 is a linear or branched alkyl group having 1 to 3 carbon atoms, preferably a methyl group, an ethyl group, and particularly preferably a methyl group. R 3 is a linear or branched alkylene group having 1 to 6 carbon atoms or a linear or branched alkenylene group having 2 to 6 carbon atoms, preferably 2 or 3 carbon atoms, particularly a straight chain having 2 carbon atoms. A chain or branched alkylene group.
[0012]
Specific examples of the compound (1) include, for example, N-methyl-N-ethanoloctanoic acid amide, N-methyl-N-ethanoldecanoic acid amide, N-methyl-N-ethanoldodecanoic acid amide, N-methyl-N- Ethanol tetradecanoic acid amide, N-methyl-N-ethanol hexadecanoic acid amide, N-methyl-N-ethanol octadecanoic acid amide, N-methyl-N-ethanol palm fatty acid amide, N-methyl-N-ethanol palm kernel fatty acid amide N-ethyl-N-isopropanol dodecanoic acid amide, N-ethyl-N-isopropanol oleic acid amide, N-ethyl-N-isopropanol isostearic acid amide and the like.
[0013]
The production method of compound (1) is not particularly limited. For example, dehydration or dealcoholization reaction of fatty acid or fatty acid lower alcohol ester and alkanolamine, reaction of fatty acid halide and alkanolamine under an alkali catalyst, or fat and alkanol It can be produced using an ester-amide exchange reaction with an amine.
[0014]
The compounding amount of the compound (1) in the antifogging agent composition of the present invention is preferably 10 to 100% by weight, more preferably 10 to 90% by weight, and particularly preferably 15 to 50% by weight.
[0015]
The anti-fogging agent composition of the present invention may comprise compound (1) and further one or more selected from polyhydric alcohol partial fatty acid (fatty acid carbon number 12 to 22) ester and an alkylene oxide adduct thereof. It is preferable from the viewpoint of antifogging durability.
[0016]
The polyhydric alcohol partial fatty acid ester that can be used in the present invention is composed of sorbitan, sorbitol, glycerin, polyglycerin, pentaerythritol, dipentaerythritol, sucrose, ethylene glycol, polyethylene glycol, propylene. Preferred are those selected from glycol, polypropylene glycol, neopentyl glycol, 1,4-butanediol, 1,6-hexanediol, trimethylolpropane, and N, N-bishydroxyalkylamine, among which sorbitan, sorbitol, and glycerin. Polyglycerin is preferable from the viewpoint of anti-fogging durability.
[0017]
Moreover, the fatty acid which comprises the said ester is C12-22, Preferably it is a C12-18 saturated or unsaturated fatty acid, and these can be used individually or in combination of 2 or more types. The partial fatty acid ester of a polyhydric alcohol has a degree of esterification represented by the following formula of less than 1, preferably less than 0.5.
[0018]
[Expression 1]
Figure 0004651859
[0019]
The alkylene oxide adduct of the polyhydric alcohol partial fatty acid ester that can be used in the present invention is preferably an ethylene oxide adduct or a propylene oxide adduct, and the average number of moles added is 1 mol of the hydroxyl group of the polyhydric alcohol. The amount is preferably 0.3 to 20 mol, and more preferably 0.5 to 10 mol.
[0020]
10-90 weight% is preferable and, as for the 1 or more types of compounding quantity chosen from the polyhydric alcohol partial fatty acid ester and its alkylene oxide adduct in the antifogging agent composition of this invention, 50-85 weight% is still more preferable.
[0021]
Compound (1) (referred to as component (a)), polyhydric alcohol partial fatty acid (fatty acid having 12 to 22 carbon atoms) ester, and alkylene oxide adduct (component (b)) in the antifogging agent composition of the present invention The blending ratio is preferably (a) component / (b) component = 90/10 to 10/90 from the viewpoint of anti-fogging sustainability, particularly 50/50 to 15/85. Preferably there is.
[0022]
The antifogging agent and antifogging agent composition of the present invention can be blended with various thermoplastic resins to obtain an antifogging resin composition having excellent antifogging properties. Examples of the thermoplastic resin targeted by the present invention include homopolymers or copolymers of olefins such as ethylene and propylene, and vinyl chloride resins, and polyolefins such as polyethylene, ethylene-vinyl acetate copolymer, and polypropylene. Resin is preferable because the effect is remarkable. Moreover, the application to the multilayer synthetic resin film which consists of two or more layers is also possible, and 3 of EVA-EVA-EVA using the ethylene-vinyl acetate copolymer (EVA) from which the ratio of vinyl acetate differs as a multilayer synthetic resin film. Examples thereof include a layer film, a three-layer film of polyethylene (LDPE) -EVA-LDPE, a three-layer film of linear low density polyethylene (LLDPE) -EVA-LLDPE, and the like. Addition of the antifogging agent or antifogging agent composition of the present invention to these may be added to any layer regardless of the inner layer and the outer layer, and may be added not only to one layer but also to two or more layers. .
[0023]
The blending amount of the antifogging agent composition in the antifogging resin composition of the present invention is preferably 0.5 to 5 parts by weight, more preferably 0.5 to 3 parts by weight with respect to 100 parts by weight of the thermoplastic resin. 0.5 to 2 parts by weight is particularly preferable.
[0024]
The compounding amount of the compound (1) in the antifogging resin composition of the present invention is preferably 0.3 to 5 parts by weight, more preferably 0.4 to 3 parts by weight with respect to 100 parts by weight of the thermoplastic resin. Moreover, 0.1-4 weight part is preferable with respect to 100 weight part of thermoplastic resins, and the compounding quantity of 1 or more types chosen from a polyhydric alcohol partial fatty acid ester and its alkylene oxide adduct is 0.2-3 weight part Is more preferable.
[0025]
In the antifogging resin composition of the present invention, other additives can be blended within a range that does not impair the effects of the present invention. Specifically, olefin rubbers such as ethylene-propylene rubber and ethylene-butene rubber; inorganic fillers such as talc; organic and inorganic pigments; phenolic and phosphorus antioxidants; amines and triazoles Light stabilizers such as organic; organic and inorganic nucleating agents; lubricants; metal deactivators; molecular weight regulators; antibacterial agents;
[0026]
When using the antifogging resin composition of this invention as a molded object, it can manufacture by a normal method. For example, after mixing compound (1) with a polyhydric alcohol partial fatty acid ester or its alkylene oxide adduct or other function-imparting agent added to powdered thermoplastic resin with a Henschel mixer or the like, it is uniaxial or biaxial. Pelletize with an extruder. The pellets thus obtained can be extruded to obtain a desired molded product such as a film or sheet. Moreover, there is no restriction | limiting in the addition method to resin of a compound (1), Even if it adds with the masterbatch produced beforehand, the same outstanding effect can be acquired.
[0027]
【Example】
Examples 1-4 and Comparative Examples 1-2
Compound (1) shown in Table 1 as an antifogging agent, polyhydric alcohol partial fatty acid ester, etc. with respect to 100 parts by weight of ethylene-vinyl acetate (vinyl acetate content 5%) copolymer resin (EVA) finely pulverized in advance Were mixed in the amounts shown in Table 1 and mixed with a Henschel mixer to obtain a resin composition. This resin composition was pelletized using a twin-screw extruder set at 210 ° C., and then a film having a thickness of 50 μm was prepared using a T-die film forming apparatus set at 230 ° C.
[0028]
About the obtained film, antifogging sustainability, low temperature antifogging property, and transparency were evaluated by the following methods. The results are shown in Table 1.
[0029]
<Anti-fog durability>
50 cc of water was put into a 200 cc sample bottle pasted in a lid shape using a film, kept at room temperature 5 ° C. and water temperature 40 ° C., and evaluated for antifogging properties after 1, 7 and 14 days according to the following criteria. In order to increase the steam circulation of the film, each sample bottle was set slightly tilted.
A: The entire surface of the film is uniformly wetted and there is no repellency. O: The entire surface of the film is almost evenly wetted, but there is a slight repelling point. Δ: A repelling point is recognized in 20 to 50% of the film evaluation part. <Low temperature anti-fogging property>
Using a 10cm x 20cm x 5cm tray, put the cucumber that was bisected vertically. The film made for the test was capped at the top and completely covered with eyes, placed in a refrigerator at 5 ° C., observed for antifogging after 1 hour and 24 hours, and evaluated according to the following criteria.
◎: Water droplets are not visible on the film and the contents are visible. ○: The content is visible, but the water droplets are slightly visible. △: The water droplets attached to the film are fine and the contents are difficult to see. ×: The film is fine. It looks white with water droplets and the contents cannot be confirmed <Transparency>
In order to evaluate the presence or absence of blooming phenomenon due to the antifogging agent on the film surface, that is, transparency, the film was treated at 40 ° C. for 2 weeks, and the turbidity of the film was measured with a haze meter. The transparency ranks determined from this are shown in the following five levels.
◎: No whitening is observed at all ○: Whitening is only slightly observed Δ: Whitening is slightly observed ×: Clear whitening is observed XX: Opaque
[Table 1]
Figure 0004651859
[0031]
note)
* 1 MELAD: N-methyl-N-ethanol lauric acid amide * 2 MESAD: N-methyl-N-ethanol stearic acid amide * 3 Sorbitan monostearate: Rheodor SP-S10 manufactured by Kao Corporation
* 4 Diglycerin monooleate: Sunsulzer 4120 manufactured by Kao Corporation
Examples 5-7 and Comparative Examples 3-4
Compound (1) shown in Table 2 as an antifogging agent with respect to 100 parts by weight of random polypropylene (PP) whose MFR (JIS-K7210, 230 ° C., 2.16 kg load) finely pulverized in advance is 2 g / 10 minutes, and Polyhydric alcohol partial fatty acid esters and the like were mixed in the amounts shown in Table 2, and mixed with a Henschel mixer to obtain a resin composition. This resin composition was pelletized using a twin screw extruder set at 210 ° C., and then a sheet having a thickness of 1 mm was prepared by a T-die processing machine set at 230 ° C.
[0032]
About the obtained sheet | seat, antifogging sustainability, low temperature antifogging property, and transparency were evaluated by the same method except having used a sheet | seat instead of a film in said evaluation method.
The results are shown in Table 2.
[0033]
[Table 2]
Figure 0004651859
[0034]
* 1 to * 4 in the table are the same as in Table 1.
【The invention's effect】
The antifogging resin composition of the present invention is excellent in antifogging level (low temperature antifogging property, initial antifogging property) and antifogging sustainability, and is excellent in transparency.

Claims (4)

式(1)で表される化合物からなる防曇剤。
Figure 0004651859
(式中、R1CO-は炭素数6〜24の水酸基を有していてもよい飽和又は不飽和のアシル基、R2は炭素数1〜3の直鎖又は分岐鎖のアルキル基、R3は炭素数1〜6の直鎖又は分岐鎖のアルキレン基あるいは炭素数2〜6の直鎖又は分岐鎖のアルケニレン基を示す。)
An antifogging agent comprising the compound represented by formula (1).
Figure 0004651859
(In the formula, R 1 CO- is a saturated or unsaturated acyl group optionally having a hydroxyl group having 6 to 24 carbon atoms, R 2 is a linear or branched alkyl group having 1 to 3 carbon atoms, R 3 represents a linear or branched alkylene group having 1 to 6 carbon atoms or a linear or branched alkenylene group having 2 to 6 carbon atoms.
請求項1記載の式(1)で表される化合物と、多価アルコール部分脂肪酸(脂肪酸の炭素数12〜22)エステル及びそのアルキレンオキサイド付加物から選ばれる1種以上を含有する防曇剤組成物。  An antifogging agent composition comprising at least one compound selected from the compound represented by formula (1) according to claim 1 and a polyhydric alcohol partial fatty acid (fatty acid carbon number 12 to 22) ester and an alkylene oxide adduct thereof. object. 熱可塑性樹脂に、請求項2記載の防曇剤組成物を配合してなる防曇性樹脂組成物。  An antifogging resin composition comprising the thermoplastic resin and the antifogging agent composition according to claim 2. 式(1)で表される化合物の配合量が、熱可塑性樹脂100重量部に対し、0.3〜5重量部である請求項3記載の防曇性樹脂組成物。Amount of the compound represented by formula (1) is 100 parts by weight of the thermoplastic resin to, anti-fogging resin composition according to claim 3 Symbol placement is 0.3 to 5 parts by weight.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3644478A (en) * 1969-11-13 1972-02-22 Us Agriculture Ethyl 2 2-dimethyl-3-(di-n-butylamino)-carbonylcyclobutaneacetate
JPS59213749A (en) * 1983-05-19 1984-12-03 Mitsubishi Plastics Ind Ltd Production of stretch film
JPS60240781A (en) * 1984-05-14 1985-11-29 Miyoshi Oil & Fat Co Ltd Antistatic agent composition
JP2000007828A (en) * 1998-06-23 2000-01-11 Kao Corp Anti-fogging agent composition for synthetic resin
JP2002348565A (en) * 2001-05-29 2002-12-04 Kao Corp Antistatic agent

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3644478A (en) * 1969-11-13 1972-02-22 Us Agriculture Ethyl 2 2-dimethyl-3-(di-n-butylamino)-carbonylcyclobutaneacetate
JPS59213749A (en) * 1983-05-19 1984-12-03 Mitsubishi Plastics Ind Ltd Production of stretch film
JPS60240781A (en) * 1984-05-14 1985-11-29 Miyoshi Oil & Fat Co Ltd Antistatic agent composition
JP2000007828A (en) * 1998-06-23 2000-01-11 Kao Corp Anti-fogging agent composition for synthetic resin
JP2002348565A (en) * 2001-05-29 2002-12-04 Kao Corp Antistatic agent

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