JP5912595B2 - Infrared absorber and heat insulating resin composition - Google Patents
Infrared absorber and heat insulating resin composition Download PDFInfo
- Publication number
- JP5912595B2 JP5912595B2 JP2012020737A JP2012020737A JP5912595B2 JP 5912595 B2 JP5912595 B2 JP 5912595B2 JP 2012020737 A JP2012020737 A JP 2012020737A JP 2012020737 A JP2012020737 A JP 2012020737A JP 5912595 B2 JP5912595 B2 JP 5912595B2
- Authority
- JP
- Japan
- Prior art keywords
- magnesium carbonate
- mass
- anhydrous magnesium
- infrared
- synthetic
- 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.)
- Active
Links
Images
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
この発明は、波長5〜10μｍで高い赤外線吸収能を示す赤外線吸収剤及び保温性樹脂組成物に関する。 This invention relates to an infrared absorption adsorbents and warmth resin composition shows a high infrared absorptivity at a wavelength of 5 to 10 [mu] m.
水酸化マグネシウム等の無機化合物を赤外線吸収剤として合成樹脂に配合し、温室用の農業用フィルム等とすることが行われている。例えば特許文献１（特公平３−５０７９１）は、BET比表面積が2〜15m2/g、２次粒子径が２μｍ以下の粒子が90%以上の水酸化マグネシウムを赤外線吸収剤とすることを開示している。また特許文献２（特開昭６３−１４９１４７）は、ハイドロタルサイト（Mg6Al2(OH)16CO3・4H2O）を配合した農業用フィルムを開示している。さらに特許文献３（特許３９３３２９７）は、塩基性炭酸マグネシウム（nMgCO3・Mg(OH)2・mH2O：nは３〜５，mは０〜３）を配合した農業用フィルムを開示している。 An inorganic compound such as magnesium hydroxide is blended in a synthetic resin as an infrared absorber to produce an agricultural film for greenhouses. For example, Patent Document 1 (Japanese Patent Publication No. 3-50791) discloses that magnesium hydroxide having a BET specific surface area of 2 to 15 m 2 / g and a secondary particle diameter of 2 μm or less of 90% or more is used as an infrared absorber. doing. Japanese Patent Application Laid-Open No. 63-149147 discloses an agricultural film containing hydrotalcite (Mg 6 Al 2 (OH) 16 CO 3 .4H 2 O). Further, Patent Document 3 (Patent 3933297) discloses an agricultural film in which basic magnesium carbonate (nMgCO 3 · Mg (OH) 2 · mH 2 O: n is 3 to 5 and m is 0 to 3) is blended. Yes.
しかしながら発明者の実験によると、水酸化マグネシウムは波長５〜10μｍでの赤外線吸収能が低かった。またハイドロタルサイトと塩基性炭酸マグネシウムは波長５〜10μｍである程度の赤外線吸収能を示したが、合成樹脂と混合して200℃程度で成型すると発泡した。このような発泡は農業用フィルム等の保温性樹脂組成物の外観を損ねる。 However, according to the experiments by the inventors, magnesium hydroxide has a low infrared absorption ability at a wavelength of 5 to 10 μm. Hydrotalcite and basic magnesium carbonate showed a certain infrared absorption ability at a wavelength of 5 to 10 μm, but foamed when mixed with synthetic resin and molded at about 200 ° C. Such foaming impairs the appearance of a heat-retaining resin composition such as an agricultural film.
特許文献４（特許４４５５９１１）は、無水炭酸マグネシウムをエンジニアリングプラスチックのフィラーとすると、熱伝導性と難燃性を付与できることを開示している。そして無水炭酸マグネシウムは、BET比表面積が1〜15m2/g、平均粒子径が1〜10μmが良いとしている。しかしながら特許文献４は、無水炭酸マグネシウムの赤外線吸収能あるいは保温性樹脂への応用については検討していない。 Patent Document 4 (Patent 4455911) discloses that when anhydrous magnesium carbonate is used as a filler for engineering plastics, thermal conductivity and flame retardancy can be imparted. Anhydrous magnesium carbonate has a BET specific surface area of 1 to 15 m 2 / g and an average particle size of 1 to 10 μm. However, Patent Document 4 does not examine the application of anhydrous magnesium carbonate to infrared absorbing ability or heat retaining resin.
この発明の課題は、波長５〜10μｍでの赤外線吸収能に優れ、かつ200℃程度で成型しても発泡が少ない赤外線吸収剤及び保温性樹脂組成物を提供することにある。 Object of the present invention is to excellent infrared absorbing ability at a wavelength of 5 to 10 [mu] m, and be molded at about 200 ° C. to provide a foam less infrared absorption adsorbents and warmth resin composition.
この発明は、BET比表面積が3.7〜15m 2 /g、平均粒子径が0.5〜2.5μmの合成無水炭酸マグネシウムを主成分とする赤外線吸収剤にある。なおこの明細書で”〜”は下限以上で上限以下であることを意味し、平均粒子径はレーザー回折法により粒度分布を測定した際の平均値を意味する。”主成分”とは合成無水炭酸マグネシウム以外に表面処理剤等の補助的な成分を含んでいても良いことを意味し、例えばBET比表面積が0.5〜15m2/g、平均粒子径が0.5〜15μmとすると、この範囲の合成無水炭酸マグネシウムを例えば80質量%以上含有することを意味する。 The present invention resides in an infrared absorber mainly composed of synthetic anhydrous magnesium carbonate having a BET specific surface area of 3.7 to 15 m 2 / g and an average particle size of 0.5 to 2.5 μm. In this specification, “to” means not less than the lower limit and not more than the upper limit, and the average particle diameter means an average value when the particle size distribution is measured by a laser diffraction method. “Main component” means that an auxiliary component such as a surface treatment agent may be contained in addition to synthetic anhydrous magnesium carbonate. For example, the BET specific surface area is 0.5 to 15 m 2 / g, and the average particle size is 0.5 to When it is 15 μm , it means that this range contains, for example, 80% by mass or more of synthetic anhydrous magnesium carbonate.
この発明の合成無水炭酸マグネシウムは、波長5〜10μｍにおいて比較的高い赤外線吸収能を示し、かつ200℃程度の温度で、より具体的には170℃〜230℃で合成樹脂と混合して成型しても発泡が少ない。なお赤外線を吸収する波長は、合成無水炭酸マグネシウムの粒成長が進み、BET比表面積が小さく平均粒子径が大きくなると共に、長波長側にシフトする傾向がある（図１）。 The synthetic anhydrous magnesium carbonate of the present invention has a relatively high infrared absorbing ability at a wavelength of 5 to 10 μm, and is molded by mixing with a synthetic resin at a temperature of about 200 ° C., more specifically at 170 ° C. to 230 ° C. But there is little foaming. In addition, the wavelength which absorbs infrared rays tends to shift to the longer wavelength side as the grain growth of synthetic anhydrous magnesium carbonate proceeds, the BET specific surface area decreases and the average particle diameter increases (FIG. 1).
合成無水炭酸マグネシウムの平均粒子径が0.5μm未満あるいはBET比表面積が15m２/g超では、合成樹脂中で合成無水炭酸マグネシウムが再凝集して、樹脂組成物が外観不良となる。また平均粒子径が15μm超あるいはBET比表面積が0.5m２/g未満では、赤外線吸収能が低下する。 When the average particle diameter of the synthetic anhydrous magnesium carbonate is less than 0.5 μm or the BET specific surface area is more than 15 m 2 / g, the synthetic anhydrous magnesium carbonate reaggregates in the synthetic resin, resulting in a poor appearance of the resin composition. Further, when the average particle diameter exceeds 15 μm or the BET specific surface area is less than 0.5 m 2 / g, the infrared absorption ability decreases.
図１及び表１に示すように、BET比表面積が比較的大きくかつ平均粒子径が比較的小さい場合に、赤外線吸収能が高くなる傾向があり、特に波長6〜9μｍ、より具体的には波長6.5〜7.5μｍでの赤外線吸収能が高くなる。そして波長6.5〜7.5μｍ等での赤外線吸収能を高くすることにより、波長5〜10μｍでの平均的な赤外線吸収能が高くするために、合成無水炭酸マグネシウムはBET比表面積が3.7〜15m2/g、平均粒子径が0.5〜2.5μmとし、BET比表面積が5〜15m２/g、平均粒子径が0.6〜2μmがより好ましく、BET比表面積が7〜15m２/g、平均粒子径が0.7〜1.5μmが最も好ましい。
As shown in FIG. 1 and Table 1, when the BET specific surface area is relatively large and the average particle diameter is relatively small, the infrared absorption ability tends to be high, particularly the
合成無水炭酸マグネシウムを合成樹脂中に分散させるには、例えば合成無水炭酸マグネシウム100質量%当たり0.1〜5質量%の表面処理剤により、合成無水炭酸マグネシウム粒子の表面を被覆することが好ましい。表面処理剤は、例えば炭素数が8〜26、好ましくは炭素数が10〜２２の高級脂肪酸、前記の高級脂肪酸のナトリウム塩等の金属塩、前記の高級脂肪酸のエステル、前記の高級脂肪酸のアマイド、炭素数が例えば5〜26の高級アルコール等であり、高級アルコールはネオペンチルポリオール等の多価アルコールでも良い。硬化油、シランカップリング剤、アルコールリン酸エステル等も表面処理剤として用いることができる。 In order to disperse the synthetic anhydrous magnesium carbonate in the synthetic resin, for example, the surface of the synthetic anhydrous magnesium carbonate particles is preferably coated with 0.1 to 5% by mass of a surface treatment agent per 100% by mass of the synthetic anhydrous magnesium carbonate. Examples of the surface treatment agent include higher fatty acids having 8 to 26 carbon atoms, preferably 10 to 22 carbon atoms, metal salts such as sodium salts of the higher fatty acids, esters of the higher fatty acids, and amides of the higher fatty acids. , Higher alcohols having 5 to 26 carbon atoms, and the higher alcohols may be polyhydric alcohols such as neopentyl polyol. Hardened oil, silane coupling agent, alcohol phosphate ester and the like can also be used as the surface treatment agent.
この発明の合成無水炭酸マグネシウムは、中性炭酸マグネシウム(MgCO3・nH2O；nは例えば0〜3)をオートクレーブ中で水熱処理した後に乾燥することにより製造される。 The synthetic anhydrous magnesium carbonate of the present invention is produced by subjecting neutral magnesium carbonate (MgCO 3 · nH 2 O; n is 0 to 3 for example) to hydrothermal treatment in an autoclave and then drying.
この発明の保温性樹脂組成物では、合成樹脂100質量%当たり、この発明の赤外線吸収剤を1〜50質量%配合する。合成樹脂は、例えばポリエチレン、ポリプロピレン、ポリ塩化ビニル、エチレン−酢酸ビニル共重合体等のポリオレフィンが好ましく、例えばフィルム状あるいはシート状等に成型して、温室用あるいは建築材料用等に用いる。そしてこの発明の保温性樹脂組成物は、波長5〜10μｍでの赤外線吸収能が比較的高いので、太陽光中の赤外線等を吸収して保温性を発揮し、200℃等で成型しても発泡しないので、農業用フィルム等の外観に優れている。赤外線吸収剤の配合部数が1質量%未満では赤外線吸収能が不十分で、50質量%超では樹脂組成物の強度・伸び・柔軟性が損なわれる。赤外線吸収能と樹脂組成物の強度・伸び・柔軟性のバランスから、赤外線吸収剤の配合部数は好ましくは2〜20質量%とし、さらに好ましくは5〜10質量%とする。 In the heat retaining resin composition of the present invention, 1 to 50% by mass of the infrared absorbent of the present invention is blended per 100% by mass of the synthetic resin. The synthetic resin is preferably a polyolefin such as polyethylene, polypropylene, polyvinyl chloride, or ethylene-vinyl acetate copolymer. For example, it is molded into a film or sheet and used for greenhouses or building materials. And since the heat-retaining resin composition of this invention has a relatively high infrared absorption ability at a wavelength of 5 to 10 μm, it absorbs infrared rays in sunlight and exhibits heat-retaining properties. Since it does not foam, it has excellent appearance such as agricultural film. If the blending number of the infrared absorber is less than 1% by mass, the infrared absorbing ability is insufficient, and if it exceeds 50% by mass, the strength, elongation and flexibility of the resin composition are impaired. From the balance of the infrared absorbing ability and the strength / elongation / flexibility of the resin composition, the blending number of the infrared absorber is preferably 2 to 20% by mass, more preferably 5 to 10% by mass.
以下にこの発明の実施例を示し、この発明の実施に際しては、実施例に公知技術を加味して変更を施すことができ、実施例はこの発明の範囲を限定するものではない。 Examples of the present invention will be shown below, and in implementing the present invention, modifications can be made by adding known techniques to the examples, and the examples do not limit the scope of the present invention.
赤外線吸収剤の調製（実施例１）
容量100Lの攪拌機付きオートクレーブに0.3mol/Lの濃度に調製した中性炭酸マグネシウム（MgCO3・3H2O）懸濁液50Lを入れ、攪拌しながら200℃で10時間の水熱処理を行った。得られた懸濁液を脱水後、120℃で10時間乾燥し、平均粒子径12μmでBET比表面積0.5m２/gの合成無水炭酸マグネシウムを得た。乾燥温度は例えば100℃〜160℃が好ましい。乾燥後の無水炭酸マグネシウム100質量%に対して、0.5質量%のステアリン酸を添加して、温度100℃にて乾式で表面処理した。なお実施例１は特許請求の範囲には含まれない。
Preparation of infrared absorber (Example 1)
50 L of neutral magnesium carbonate (MgCO 3 .3H 2 O) suspension prepared at a concentration of 0.3 mol / L was placed in an autoclave with a stirrer having a capacity of 100 L, and hydrothermal treatment was performed at 200 ° C. for 10 hours while stirring. The obtained suspension was dehydrated and dried at 120 ° C. for 10 hours to obtain a synthetic anhydrous magnesium carbonate having an average particle diameter of 12 μm and a BET specific surface area of 0.5 m 2 / g. The drying temperature is preferably 100 ° C. to 160 ° C., for example. 0.5% by mass of stearic acid was added to 100% by mass of anhydrous magnesium carbonate after drying, and surface treatment was performed by a dry process at a temperature of 100 ° C. Note that Example 1 is not included in the scope of claims.
赤外線吸収剤の調製（実施例２）
容量100Lの攪拌機付きオートクレーブに1mol/Lの濃度に調製した中性炭酸マグネシウム懸濁液70Lを入れ、攪拌しながら180℃で5時間の水熱処理を行った。得られた懸濁液(炭酸マグネシウムの形態は無水炭酸マグネシウム)をそのままボールミルに入れて5時間粉砕した後、無水炭酸マグネシウムに換算した固形分100質量%に対して、3質量%のステアリン酸ナトリウムを添加して表面処理し、脱水後、120℃で10時間乾燥した。このようにして、平均粒子径0.9μmでBET比表面積14m２/gの合成無水炭酸マグネシウムを得た。
Preparation of infrared absorber (Example 2)
70 L of neutral magnesium carbonate suspension adjusted to a concentration of 1 mol / L was placed in an autoclave with a stirrer having a capacity of 100 L, and hydrothermal treatment was performed at 180 ° C. for 5 hours while stirring. The obtained suspension (magnesium carbonate in the form of anhydrous magnesium carbonate) was placed in a ball mill as it was and pulverized for 5 hours, and then 3% by weight of sodium stearate with respect to 100% by weight of solid content converted to anhydrous magnesium carbonate. Was added to the surface, dehydrated and dried at 120 ° C. for 10 hours. Thus, synthetic anhydrous magnesium carbonate having an average particle size of 0.9 μm and a BET specific surface area of 14 m 2 / g was obtained.
赤外線吸収剤の調製（実施例３）
140℃で5時間の水熱処理を行い、1質量％のステアリン酸で乾式表面処理をした以外は、実施例1と同様な操作を行って、平均粒子径2.3μmでBET比表面積4m２/gの合成無水炭酸マグネシウムを得た。
Preparation of infrared absorber (Example 3)
Except for hydrothermal treatment at 140 ° C. for 5 hours and dry surface treatment with 1% by mass of stearic acid, the same operation as in Example 1 was performed to obtain an average particle diameter of 2.3 μm and a BET specific surface area of 4 m 2 / g. Thus, anhydrous magnesium carbonate was obtained.
赤外線吸収剤の調製（実施例４）
130℃で8時間の水熱処理を行った後にボールミルにて5時間の粉砕を行い、2質量％のステアリン酸ナトリウムで湿式表面処理をした以外は、実施例2と同様な操作を行って、平均粒子径1.1μmでBET比表面積6m２/gの合成無水炭酸マグネシウムを得た。
Preparation of infrared absorber (Example 4)
After performing hydrothermal treatment at 130 ° C. for 8 hours, grinding for 5 hours with a ball mill, and performing wet surface treatment with 2% by mass of sodium stearate, the same operation as in Example 2 was performed, and the average A synthetic anhydrous magnesium carbonate having a particle diameter of 1.1 μm and a BET specific surface area of 6 m 2 / g was obtained.
比較例1
マグネサイト鉱を粉砕した無水炭酸マグネシウム粉末（平均粒子径約100μmでBET比表面積0.1m２/g）を水に懸濁して1mol/Lの濃度に調製し、ボールミルで2時間粉砕した後、無水炭酸マグネシウム換算の固形分100質量%に対して、1質量%のステアリン酸ナトリウムを添加して表面処理し、脱水後、120℃で10時間乾燥した。このようにして、平均粒子径13μmでBET比表面積6m２/gの天然無水炭酸マグネシウムを得た。
Comparative Example 1
Anhydrous magnesium carbonate powder (average particle size of about 100 μm and BET specific surface area of 0.1 m 2 / g) pulverized magnesite ore is prepared by suspending in water to a concentration of 1 mol / L, pulverizing with a ball mill for 2 hours, and anhydrous 1% by mass of sodium stearate was added to the solid content of 100% by mass in terms of magnesium carbonate for surface treatment, followed by dehydration and drying at 120 ° C. for 10 hours. Thus, natural anhydrous magnesium carbonate having an average particle diameter of 13 μm and a BET specific surface area of 6 m 2 / g was obtained.
比較例2
市販のハイドロタルサイト(商品名：DHT-4A「DHT-4A」は協和化学工業株式会社の登録商標)を赤外線吸収剤とした。
Comparative Example 2
Commercially available hydrotalcite (trade name: DHT-4A “DHT-4A” is a registered trademark of Kyowa Chemical Industry Co., Ltd.) was used as an infrared absorber.
比較例3
市販の水酸化マグネシウム(商品名：キスマ5A「キスマ」は協和化学工業株式会社の登録商標)を赤外線吸収剤とした。
Comparative Example 3
Commercially available magnesium hydroxide (trade name: Kisuma 5A “Kisuma” is a registered trademark of Kyowa Chemical Industry Co., Ltd.) was used as an infrared absorber.
比較例4
市販の塩基性炭酸マグネシウム(商品名：金星「金星」は神島化学工業株式会社の商品名)を赤外線吸収剤とした。
Comparative Example 4
Commercially available basic magnesium carbonate (trade name: Venus “Venus” is a trade name of Kamijima Chemical Co., Ltd.) was used as an infrared absorber.
樹脂組成物の調製と赤外線吸収量の評価
エチレン-酢酸ビニル共重合樹脂(三井デュポン株式会社製、商品名：EV-180) 100質量%に対し、実施例及び比較例の赤外線吸収剤1〜50質量%、および滑剤(ソルビタン酸モノステアレート) 1質量%を配合し、東洋精機製ラボプラストミルを用いて、200℃で5分間、回転数50rpmで溶融混練した。さらに混練物を200℃でプレス成型して、厚み1mmのシートを作成した。得られたシートを用いて、フーリエ変換型赤外分光光度計(株式会社パーキンエルマージャパン製FT-IR／ATR法)にて、波長5〜10μm(波数2000〜1000cm−１)範囲の赤外線吸収量を測定し、赤外線吸収面積を求めた。
Preparation of resin composition and evaluation of infrared absorption amount Ethylene-vinyl acetate copolymer resin (manufactured by Mitsui DuPont, trade name: EV-180) 100% by mass of infrared absorbers 1 to 50 of Examples and Comparative Examples % By mass and 1% by mass of a lubricant (sorbitan acid monostearate) were blended and melt kneaded at 200 ° C. for 5 minutes at a rotation speed of 50 rpm using a Laboplast mill manufactured by Toyo Seiki. Further, the kneaded product was press-molded at 200 ° C. to prepare a sheet having a thickness of 1 mm. Using the obtained sheet, infrared absorption in a wavelength range of 5 to 10 μm (wave number 2000 to 1000 cm −1 ) with a Fourier transform infrared spectrophotometer (FT-IR / ATR method manufactured by PerkinElmer Japan Co., Ltd.) Were measured to determine the infrared absorption area.
図１は、実施例及び比較例の赤外線吸収剤を10質量%配合した樹脂組成物の、赤外線吸収スペクトルを示す。なお、図中のblankは赤外線吸収剤を配合しない樹脂のスペクトルである。実施例１は波長8.5〜10μｍでの吸収能が高く、実施例２は波長6.5〜7.5μｍでの吸収能が著しく高い。これに対して比較例１（天然無水炭酸マグネシウム）は赤外線吸収能が低く、比較例２（ハイドロタルサイト）は6μｍ強等の一部の波長を除いて実施例１，２よりも赤外線吸収能が低い。また比較例３（水酸化マグネシウム）は赤外線吸収能を示さない。 FIG. 1 shows an infrared absorption spectrum of a resin composition containing 10% by mass of the infrared absorbers of Examples and Comparative Examples. In the figure, blank is a spectrum of a resin not containing an infrared absorber. Example 1 has a high absorption capacity at a wavelength of 8.5 to 10 μm, and Example 2 has a very high absorption capacity at a wavelength of 6.5 to 7.5 μm. On the other hand, Comparative Example 1 (natural anhydrous magnesium carbonate) has a low infrared absorbing ability, and Comparative Example 2 (hydrotalcite) has an infrared absorbing ability higher than that of Examples 1 and 2 except for some wavelengths such as slightly over 6 μm. Is low. Further, Comparative Example 3 (magnesium hydroxide) does not show infrared absorption ability.
表1は、実施例及び比較例の赤外線吸収剤を1〜20質量%配合した、樹脂組成物の赤外線吸収面積を示す。なお赤外線吸収面積は波長5〜10μｍでの吸収率の積分値で、図１での透過率Tに対し吸収率を100-T%として、波長5〜10μｍに渡って積分したものである。そしてblankでの赤外線吸収面積は47.1%なので、これとの差が赤外線吸収剤の効果を表している。実施例２は、全ての配合部数でどの試料よりも赤外線吸収面積が大きい。実施例１は、配合部数が１〜10質量％では、比較例１〜４のいずれよりも赤外線吸収面積が大きい。しかし配合部数が20質量%では比較例４よりも赤外線吸収面積が小さく、その原因は合成樹脂中での分散状態等にあるものと考えることができるが、詳細は不明である。また実施例１，２（合成無水炭酸マグネシウム）は、比較例１（天然無水炭酸マグネシウム）よりも大きな赤外線吸収面積を有している。実施例２で実施例１よりも大きな赤外線吸収面積が得られたことから、合成無水炭酸マグネシウムはBET比表面積が3.7〜15m2/g、平均粒子径が0.5〜2.5μmが好ましく、BET比表面積が5〜15m２/g、平均粒子径が0.6〜2μmがより好ましく、BET比表面積が7〜15m２/g、平均粒子径が0.7〜1.5μmが最も好ましい。 Table 1 shows the infrared absorption area of the resin composition containing 1 to 20% by mass of the infrared absorbers of Examples and Comparative Examples. The infrared absorption area is an integral value of the absorptance at a wavelength of 5 to 10 μm, and is integrated over a wavelength of 5 to 10 μm with the absorptance being 100-T% with respect to the transmittance T in FIG. And since the infrared absorption area at blank is 47.1%, the difference from this represents the effect of the infrared absorber. In Example 2, the infrared absorption area is larger than any sample in all the number of blending parts. In Example 1, the infrared absorption area is larger than that of any of Comparative Examples 1 to 4 at a blending part number of 1 to 10% by mass. However, when the number of blended parts is 20% by mass, the infrared absorption area is smaller than that of Comparative Example 4, and it can be considered that the cause is the dispersion state in the synthetic resin, but the details are unknown. Examples 1 and 2 (synthetic anhydrous magnesium carbonate) have a larger infrared absorption area than Comparative Example 1 (natural anhydrous magnesium carbonate). Since an infrared absorption area larger than that of Example 1 was obtained in Example 2, the synthetic anhydrous magnesium carbonate preferably has a BET specific surface area of 3.7 to 15 m 2 / g and an average particle diameter of 0.5 to 2.5 μm. There 5 to 15 m 2 / g, the average particle size is more preferably 0.6~2μm, BET specific surface area of 7~15m 2 / g, average particle size is most preferred 0.7～1.5Myuemu.
表2は、実施例及び比較例の赤外線吸収剤を1〜20質量%配合した樹脂組成物のシート外観(発泡)評価結果で、外観が良好なものが○、発泡が認められるが顕著でないものを△、発泡が顕著なものを×とした。素材が無水炭酸マグネシウム（実施例１，２，比較例１）あるいは水酸化マグネシウム（比較例３）であれば、20質量%配合しても発泡は生じないが、ハイドロタルサイト（比較例２）あるいは塩基性炭酸マグネシウム（比較例４）では、5質量%以上配合すると問題が生じ、10質量%以上では外観不良となることが分かる。シートの強度、伸び、柔軟性はいずれの場合も赤外線吸収剤の配合量と共に低下したので、合成樹脂100質量%当たりの赤外線吸収剤の配合量は20質量%以下、特に10質量%以下が好ましい。 Table 2 shows evaluation results of sheet appearance (foaming) of the resin compositions containing 1 to 20% by mass of the infrared absorbers of Examples and Comparative Examples. Was marked with Δ, and marked foaming was marked with ×. If the material is anhydrous magnesium carbonate (Examples 1 and 2, Comparative Example 1) or magnesium hydroxide (Comparative Example 3), foaming does not occur even when blended at 20% by mass, but hydrotalcite (Comparative Example 2). Alternatively, it can be seen that when basic magnesium carbonate (Comparative Example 4) is blended in an amount of 5% by mass or more, a problem occurs, and when it is 10% by mass or more, the appearance is poor. Since the strength, elongation, and flexibility of the sheet decreased with the amount of the infrared absorber in each case, the amount of the infrared absorber per 100% by mass of the synthetic resin is preferably 20% by mass or less, particularly preferably 10% by mass or less. .
Claims (4)
A heat insulating resin composition containing 1 to 50% by mass of the infrared absorbent according to any one of claims 1 to 3 per 100% by mass of a synthetic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012020737A JP5912595B2 (en) | 2012-02-02 | 2012-02-02 | Infrared absorber and heat insulating resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012020737A JP5912595B2 (en) | 2012-02-02 | 2012-02-02 | Infrared absorber and heat insulating resin composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2013159655A JP2013159655A (en) | 2013-08-19 |
| JP5912595B2 true JP5912595B2 (en) | 2016-04-27 |
Family
ID=49172197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2012020737A Active JP5912595B2 (en) | 2012-02-02 | 2012-02-02 | Infrared absorber and heat insulating resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5912595B2 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6210124B2 (en) * | 1980-08-13 | 1987-03-04 | Mitsubishi Monsanto Chem | |
| JPS5896637A (en) * | 1981-12-03 | 1983-06-08 | Tokuyama Soda Co Ltd | polyolefin composition |
| JPS59226037A (en) * | 1983-06-08 | 1984-12-19 | Kyowa Chem Ind Co Ltd | Resin composition for agricultural film |
| JP4156278B2 (en) * | 2002-06-05 | 2008-09-24 | 水澤化学工業株式会社 | Thermal insulation resin composition |
| JP4455911B2 (en) * | 2004-03-26 | 2010-04-21 | 神島化学工業株式会社 | Anhydrous magnesium carbonate filler, method for producing the same, and resin composition |
| JP2006160979A (en) * | 2004-12-10 | 2006-06-22 | Konoshima Chemical Co Ltd | Filler, method for producing the same, and resin composition |
-
2012
- 2012-02-02 JP JP2012020737A patent/JP5912595B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013159655A (en) | 2013-08-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101757488B1 (en) | Hydrotalcite particulate powder, heat retention agent for agricultural film, masterbatch for agricultural film, and agricultural film | |
| Oualha et al. | Development of metal hydroxide nanoparticles from eggshell waste and seawater and their application as flame retardants for ethylene-vinyl acetate copolymer (EVA) | |
| ES2732812T3 (en) | Calcium carbonate compositions treated with stearic acid having low or no detectable free stearic acid and related methods | |
| SK11502000A3 (en) | Hydrotalcite compound, process for producing the same, and agricultural film containing the same | |
| JP4193044B2 (en) | Mg-Zn-Al-based hydrotalcite-type particle powder and resin composition using the Mg-Zn-Al-based hydrotalcite-type particle powder | |
| EP3402846A1 (en) | Treatment of surface-reacted calcium carbonate | |
| JP5370682B2 (en) | Zn-Mg-Al hydrotalcite-type particle powder and resin composition containing the Zn-Mg-Al hydrotalcite-type particle powder | |
| JPWO2011111487A1 (en) | Synthetic resin filler, synthetic resin composition, production method thereof, and molded article thereof | |
| WO2008054818A2 (en) | Smoke suppressants | |
| JP5912595B2 (en) | Infrared absorber and heat insulating resin composition | |
| JP4429566B2 (en) | Agricultural film heat insulating agent, agricultural film masterbatch pellets and agricultural film | |
| WO2023074665A1 (en) | Zirconium hydroxide powder and method for producing zirconium hydroxide powder | |
| JP3757205B2 (en) | Compounding agent for resin | |
| JP2014019784A (en) | Surface-treated ground calcium carbonate, process for producing the same and resin composition comprising calcium carbonate | |
| JP2001172608A (en) | Far-infrared to far-infrared absorbing complex metal polybasic salt | |
| KR20190135048A (en) | Precipitated calcium carbonate to reduce emissions of volatile organic compounds | |
| TWI851390B (en) | Surface treated calcium carbonate filler, and resin composition and molded product using the same | |
| JP5413551B2 (en) | Al-Li infrared absorber and method for producing the same, agricultural film, master batch pellet for agricultural film | |
| CN105683273A (en) | Resin composition and agricultural film | |
| JP2019210165A (en) | Hydrotalcite, production method thereof, heat retaining agent for agricultural film and agricultural film | |
| JP3616861B2 (en) | Aluminum hydroxide for resin filling and method for producing the same | |
| JP3444732B2 (en) | Flame retardant composition for chlorine-containing polymer and resin composition containing the same | |
| JP2011132123A (en) | Heat insulating agent and use thereof | |
| JP5568705B2 (en) | Pigment dispersion composition, coating composition, and dispersion stabilizer | |
| JPS63118374A (en) | Agricultural film |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20141110 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20150914 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20151009 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20151027 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20160307 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20160401 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 5912595 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |