JPS63183943A - Production of expanded particle for insulating material of lpg stockpiling tank - Google Patents
Production of expanded particle for insulating material of lpg stockpiling tankInfo
- Publication number
- JPS63183943A JPS63183943A JP19719586A JP19719586A JPS63183943A JP S63183943 A JPS63183943 A JP S63183943A JP 19719586 A JP19719586 A JP 19719586A JP 19719586 A JP19719586 A JP 19719586A JP S63183943 A JPS63183943 A JP S63183943A
- Authority
- JP
- Japan
- Prior art keywords
- particles
- pellets
- lpg
- expanded
- gas
- 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
Links
- 239000002245 particle Substances 0.000 title claims abstract description 76
- 239000011810 insulating material Substances 0.000 title claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims abstract description 36
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 24
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 150000005691 triesters Chemical class 0.000 claims abstract description 20
- 229920006026 co-polymeric resin Polymers 0.000 claims abstract description 14
- 239000004088 foaming agent Substances 0.000 claims abstract description 11
- 239000001294 propane Substances 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 8
- 239000011347 resin Substances 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 5
- 229930195729 fatty acid Natural products 0.000 claims abstract description 5
- 239000000194 fatty acid Substances 0.000 claims abstract description 5
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 5
- 239000001273 butane Substances 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000003860 storage Methods 0.000 claims description 12
- 235000011187 glycerol Nutrition 0.000 claims description 11
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 8
- 238000005187 foaming Methods 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims description 4
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 4
- 238000005453 pelletization Methods 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- PYSRRFNXTXNWCD-UHFFFAOYSA-N 3-(2-phenylethenyl)furan-2,5-dione Chemical compound O=C1OC(=O)C(C=CC=2C=CC=CC=2)=C1 PYSRRFNXTXNWCD-UHFFFAOYSA-N 0.000 abstract description 13
- 229920000147 Styrene maleic anhydride Polymers 0.000 abstract description 13
- 239000008188 pellet Substances 0.000 abstract description 11
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 abstract description 3
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 abstract description 3
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 abstract description 3
- 239000005642 Oleic acid Substances 0.000 abstract description 3
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 abstract description 3
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 abstract description 3
- 238000012662 bulk polymerization Methods 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 abstract 1
- 235000012424 soybean oil Nutrition 0.000 abstract 1
- 239000003549 soybean oil Substances 0.000 abstract 1
- 239000004604 Blowing Agent Substances 0.000 description 8
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000008173 hydrogenated soybean oil Substances 0.000 description 3
- 238000005470 impregnation Methods 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- DPUOLQHDNGRHBS-UHFFFAOYSA-N Brassidinsaeure Natural products CCCCCCCCC=CCCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-UHFFFAOYSA-N 0.000 description 2
- URXZXNYJPAJJOQ-UHFFFAOYSA-N Erucic acid Natural products CCCCCCC=CCCCCCCCCCCCC(O)=O URXZXNYJPAJJOQ-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- GHVNFZFCNZKVNT-UHFFFAOYSA-N decanoic acid Chemical compound CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 description 2
- DPUOLQHDNGRHBS-KTKRTIGZSA-N erucic acid Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-KTKRTIGZSA-N 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- JNYAEWCLZODPBN-JGWLITMVSA-N (2r,3r,4s)-2-[(1r)-1,2-dihydroxyethyl]oxolane-3,4-diol Chemical compound OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O JNYAEWCLZODPBN-JGWLITMVSA-N 0.000 description 1
- 239000005632 Capric acid (CAS 334-48-5) Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- VOPWNXZWBYDODV-UHFFFAOYSA-N Chlorodifluoromethane Chemical compound FC(F)Cl VOPWNXZWBYDODV-UHFFFAOYSA-N 0.000 description 1
- 239000004338 Dichlorodifluoromethane Substances 0.000 description 1
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- NEHMKBQYUWJMIP-NJFSPNSNSA-N chloro(114C)methane Chemical compound [14CH3]Cl NEHMKBQYUWJMIP-NJFSPNSNSA-N 0.000 description 1
- HRYZWHHZPQKTII-UHFFFAOYSA-N chloroethane Chemical compound CCCl HRYZWHHZPQKTII-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 1
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 1
- 229940042935 dichlorodifluoromethane Drugs 0.000 description 1
- XZTWHWHGBBCSMX-UHFFFAOYSA-J dimagnesium;phosphonato phosphate Chemical compound [Mg+2].[Mg+2].[O-]P([O-])(=O)OP([O-])([O-])=O XZTWHWHGBBCSMX-UHFFFAOYSA-J 0.000 description 1
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 1
- 229960003750 ethyl chloride Drugs 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- -1 glycerin triester Chemical class 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 239000011049 pearl Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 1
- 229940029284 trichlorofluoromethane Drugs 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はＬＰＧ備蓄タンクの断熱材として使用する発泡
粒子の製造方法に関し、特に、残留発泡ガスの少ないＬ
ＰＧ備蓄タンクの断熱材として使用する発泡粒子の製造
方法に関する。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a method for producing foamed particles used as a heat insulating material for LPG storage tanks, and in particular to a method for producing foamed particles with low residual foaming gas.
The present invention relates to a method for producing foamed particles used as a heat insulating material for a PG storage tank.
（従来の技術および解決すべき問題点）従来、ＬＰＧ備
蓄タンクの断熱材としては軽量コンクリートが使用され
ているが、最近、発泡プラスチックが軽量にして断熱効
果が大きいために使用され始めている。しかし、発泡プ
ラスチック粒は発泡剤として低級炭化水素やフレオンガ
スを使用することが多いが低級炭化水素ガスを使用した
場合発泡粒子中に残留するとガス漏洩の誤検知につなが
り好ましくなく、他方、フレオンガスを使用した場合に
は発泡粒子より残留フレオンガスが散逸してＬＰＧタン
ク内装鉄板の溶接熱により分解してホスゲンを発生し、
その毒性のため好ましくない、これらのことからＬＰＧ
（［１蓄タンクの断熱材として使用する発泡粒子には残
留ガスができるだけ少ないことが望ましい。(Prior Art and Problems to be Solved) Conventionally, lightweight concrete has been used as a heat insulating material for LPG storage tanks, but recently foamed plastic has begun to be used because it is lightweight and has a large heat insulating effect. However, foamed plastic particles often use low-grade hydrocarbons or Freon gas as a blowing agent, but if low-grade hydrocarbon gas is used and remains in the foamed particles, it may lead to false detection of gas leakage, which is undesirable. In this case, residual freon gas is dissipated from the foamed particles and decomposed by the welding heat of the steel plate inside the LPG tank, generating phosgene.
LPG is undesirable due to its toxicity.
([1] It is desirable that the foamed particles used as the insulation material of the storage tank contain as little residual gas as possible.
そこで、本発明者は残留ガスの少ない発泡粒子を得るた
め種々検討した結果、樹脂粒子をリペレット化すること
、低温度で発泡剤を含浸すること。Therefore, the inventors of the present invention conducted various studies to obtain foamed particles with less residual gas, and as a result, they decided to re-pelletize the resin particles and impregnate them with a foaming agent at a low temperature.
および、得られた発泡性樹脂粒子の表面をグリセリンの
トリエステルで処理すること、更に発泡された発泡粒子
を高温処理を施すことにより低ガス品を得ることを見出
し、本発明を完成したもので、本発明の目的はＬＰＧ備
蓄タンクの断熱材として適した残留ガスの少ない発泡粒
子の製造方法を提供するにある。They also discovered that a low-gas product can be obtained by treating the surface of the resulting expandable resin particles with glycerin triester, and by subjecting the expanded foamed particles to high temperature treatment, and have completed the present invention. An object of the present invention is to provide a method for producing foamed particles with low residual gas suitable as a heat insulating material for LPG storage tanks.
（問題点の解決手段）
すなわち、本発明はスチレンと無水マレイン酸との共重
合体樹脂粒子に、易揮発性発泡剤を含浸させて、ＬＰＧ
備蓄タンクの断熱材用発泡粒子を製造するにあたり、該
共重合体樹脂粒子をリペレット化した後、５０〜７０℃
の範囲で易揮発性発泡剤を含浸させ、得られた該発泡性
共重合体樹脂粒子の表面をグリセリンと炭素数１６〜１
８の脂肪酸とからなるトリエステルで被覆し、加熱発泡
して発泡粒子となし、該発泡粒子を少なくとも８０℃の
温度で処理せしめることを特徴とするＬＰＧ（Ｉｌｌタ
ンクの断熱材用発泡粒子の製造方法を要旨とするもので
ある。(Means for Solving Problems) That is, the present invention impregnates copolymer resin particles of styrene and maleic anhydride with an easily volatile blowing agent to produce LPG.
In producing foamed particles for insulation materials for storage tanks, the copolymer resin particles are re-pelletized and then heated to 50 to 70°C.
The surface of the resultant foamable copolymer resin particles is impregnated with a readily volatile foaming agent in a range of
Production of foamed particles for insulation material of LPG (Ill tank) characterized by coating with a triester consisting of 8 fatty acids, heating and foaming to form foamed particles, and treating the foamed particles at a temperature of at least 80°C. The gist is the method.
本発明におけるリペレット化とは、塊状重合法によって
得られたスチレン−無水マレイン酸共重合体樹脂を、押
出機を用いてストランド状に押し出してホットカットさ
れたペレットを、再度押出機を用いてストランド状に押
し出し、このストランドを冷却水水槽を通過させて、冷
却されたストランドをペッレト状にカットするものであ
る。Repelletization in the present invention refers to extruding the styrene-maleic anhydride copolymer resin obtained by bulk polymerization into strands using an extruder, hot-cutting the pellets, and then extruding the hot-cut pellets into strands using the extruder again. The strands are extruded into pellets, passed through a cooling water tank, and the cooled strands are cut into pellets.
このようにリペレット化することによって、その理由は
定かでないが再ペレット化の際に熱履歴を受け、以降の
工程と相持って低ガスの発泡粒子が得られるのである。By re-pelletizing in this way, although the reason for this is not clear, thermal history is applied during re-pelletizing, and in combination with the subsequent steps, foamed particles with low gas can be obtained.
本発明におけるスチレン−無水マレイン酸共重合体樹脂
の形状としては、ペレット状の方がパール状より残留ガ
スが少なく好ましい。そして、本発明では易揮発性発泡
剤を含浸させる温度として５０〜７０℃の範囲を採用す
るのである。通常、熱可塑性樹脂に易揮発性発泡剤を含
浸させる温度としては８０℃以上であり、８０℃以下の
ような低温では含浸速度が遅いために用いられる事が少
ない、しかし、このような８０℃以上の温度で含浸した
発泡粒子は残留ガス量が多く、ＬＰＧ［蓄タンクの断熱
材用発泡粒子としては不適であった０本発明者らは含浸
温度として５０〜７０℃の範囲を採用することにより得
られた発泡粒子を断熱剤として使用した場合残留ガスが
少ないことを見出したのである。Regarding the shape of the styrene-maleic anhydride copolymer resin in the present invention, pellets are preferable because they have less residual gas than pearls. In the present invention, the temperature for impregnating the easily volatile foaming agent is in the range of 50 to 70°C. Normally, the temperature at which thermoplastic resin is impregnated with an easily volatile blowing agent is 80°C or higher, and low temperatures below 80°C are rarely used because the impregnation rate is slow. The foamed particles impregnated at the above temperature have a large amount of residual gas, making them unsuitable as foamed particles for insulation of LPG storage tanks. It was discovered that when the foamed particles obtained by this method were used as a heat insulating agent, residual gas was reduced.
しかして、含浸温度が５０℃以下であると含浸速度が遅
いのみならず得られた発泡粒子は有芯であって発泡倍率
が上がらず、他方、７０’Ｃ以上では発泡粒子からの残
留ガスの逸散が遅く残留ガスの少ない発泡粒子を得るこ
とができない、好適な温度としては６０℃近傍の温度で
ある１本発明の発泡性スチレン−無水マレイン酸共重合
体樹脂粒子に含まれている発泡剤としては、プロパン、
ブタン、ペンタン、ヘキサン、メチルクロライド、エチ
ルクロライド、ジクロロジフルオロメタン、クロロジフ
ルオロメタン、トリクロロフルオロメタン等は使用され
るが、毒性等の観点がらプロパン、ブタン、ペンタンの
単独使用若しくは併用使用されたものが好ましい。However, if the impregnation temperature is below 50°C, not only will the impregnation rate be slow, but the resulting foamed particles will have a core and the expansion ratio will not increase. The preferred temperature is around 60° C., where it is difficult to obtain expanded particles with low residual gas due to slow dissipation.1 Expanded styrene-maleic anhydride copolymer resin particles of the present invention As an agent, propane,
Butane, pentane, hexane, methyl chloride, ethyl chloride, dichlorodifluoromethane, chlorodifluoromethane, trichlorofluoromethane, etc. are used, but from the viewpoint of toxicity, propane, butane, and pentane are used alone or in combination. preferable.
上記発泡剤を含浸した発泡性スチレン−無水マレイン酸
共重合体樹脂粒子表面をグリセリンと炭素数１６〜１８
の脂肪酸とからなるトリエステルで被覆すると発泡時に
破泡して発泡剤の散逸が加速されて得られた発泡粒子の
残留ガス量は少なくなる。The surface of the expandable styrene-maleic anhydride copolymer resin particles impregnated with the above blowing agent is coated with glycerin having 16 to 18 carbon atoms.
When coated with a triester consisting of a fatty acid, the foam breaks during foaming, accelerates the dissipation of the foaming agent, and reduces the amount of residual gas in the resulting foamed particles.
トリエステルの添加量としては０．１％程度以上であっ
て、０．１％以下では効果がなく、なお、１．０％以上
では添加量を増す意味がない。The amount of triester added is about 0.1% or more, and if it is less than 0.1%, there is no effect, and if it is more than 1.0%, there is no point in increasing the amount added.
本発明で使用されるトリエステルとしては大豆硬化油と
グリセリンのトリエステル、オレイン酸とグリセリンの
トリエステル、カプリン酸とグリセリンのトリエステル
、エルカ酸とグリセリンのトリエステル、オレイン酸と
グリセリンのトリエステル、エルカ酸とソルビタンのト
リエステル、等を挙げることが出来る。The triesters used in the present invention include triesters of hydrogenated soybean oil and glycerin, triesters of oleic acid and glycerin, triesters of capric acid and glycerin, triesters of erucic acid and glycerin, and triesters of oleic acid and glycerin. , triester of erucic acid and sorbitan, etc.
次に１発泡剤を含浸した発泡性スチレン−無水マレイン
酸共重合体樹脂粒子を加熱して発泡粒子とするのである
が、更に、得られた発泡粒子を高温処理するのである。Next, the expandable styrene-maleic anhydride copolymer resin particles impregnated with a blowing agent are heated to form expanded particles, and the obtained expanded particles are further subjected to high temperature treatment.
すなわち、本発明では熱可塑性樹脂としてスチレンと無
水マレイン酸との共重合体を使用するのであるが、該樹
脂はスチレン樹脂よりも耐熱性が高いため発泡粒子を高
温処理することが可能である。発泡粒子を高温処理する
ことにより発泡粒子中の残留発泡剤を散逸させることが
でき、よりＬＰＧ備蓄タンクの断熱用に適した発泡粒子
とすることが出来る。かかる高温処理の温度としては少
なくとも８０℃が必要である。８０℃以下の温度では、
充分に発泡剤を散逸指せることができない。好ましくは
８０℃〜１１０℃の温度で処理することである。That is, in the present invention, a copolymer of styrene and maleic anhydride is used as the thermoplastic resin, and since this resin has higher heat resistance than styrene resin, the expanded particles can be treated at high temperatures. By treating the foamed particles at a high temperature, the residual foaming agent in the foamed particles can be dissipated, and the foamed particles can be made more suitable for insulation of LPG storage tanks. The temperature of such high-temperature treatment must be at least 80°C. At temperatures below 80℃,
The blowing agent cannot be sufficiently dissipated. Preferably, the treatment is carried out at a temperature of 80°C to 110°C.
次に、本発明を実施例を以って具体的に説明する。Next, the present invention will be specifically explained using examples.
実施例 １
内容積が５Ｑのオートクレーブ中に水２４００ ｇ、ピ
ロリン酸マグネシウム５．５ｇ、ドデシルベンゼンスル
ホン酸ナトリウム０．３６ ｇを加えた水性媒質を入れ
、これをホットカットされたスチレン−無水マレイン酸
共重合体樹脂（無水マレイン酸含量８．０重量％、平均
重合度１２００、商品名ダイラーク、米国アーコポリマ
ー社製）を約２３０℃の押出機温度を通過してリペレッ
ト化して得た長さ１．３ｍ、直径１．０ｏｎのペレット
状スチレン−無水マレイン酸共重合体粒子１６００ ｇ
を添加して懸濁液としたのち、トルエン６４ｇを投入し
次いで気密状態でプロパン３２ｇ（ポリマーに対し２％
）およびペンタン１２８ｇ（ポリマーに対し８％）をそ
れぞれ圧入した。その後、６０℃まで昇温し、その温度
で８時間維持した。しかる後に３０℃まで冷却して発泡
剤が含浸された発泡性樹脂粒子を取りだし、この粒子を
洗浄、脱水、乾燥した後、封をした容器に入れ１５℃の
温度で７２時間保持した。しかる後、この粒子に大豆硬
化油とグリセリンのトリエステル（太陽化学製サンファ
ツトＧＴＳ−ＩＰ）を該粒子の０．２％を添加して、そ
の表面をトリエステルで被覆する。トリエステルで被覆
された発泡性スチレン−無水マレイン酸共重合体粒子中
でのプロパンガス量は、０．３９１＋１％であり、ペン
タンガス量は、５．１８１１％であった。Example 1 An aqueous medium containing 2400 g of water, 5.5 g of magnesium pyrophosphate, and 0.36 g of sodium dodecylbenzenesulfonate was placed in an autoclave with an internal volume of 5Q, and this was mixed with hot-cut styrene-maleic anhydride. Length 1 obtained by re-pelletizing a copolymer resin (maleic anhydride content 8.0% by weight, average degree of polymerization 1200, trade name Dylark, manufactured by Arcopolymer, USA) through an extruder temperature of about 230 ° C. .3m, 1.0on diameter pelleted styrene-maleic anhydride copolymer particles 1600g
was added to form a suspension, then 64 g of toluene was added, and then 32 g of propane (2% based on the polymer) was added in an airtight state.
) and 128 g of pentane (8% based on the polymer) were each pressed in. Thereafter, the temperature was raised to 60°C and maintained at that temperature for 8 hours. Thereafter, the particles were cooled to 30°C and the foamable resin particles impregnated with the blowing agent were taken out, washed, dehydrated, and dried, then placed in a sealed container and kept at a temperature of 15°C for 72 hours. Thereafter, a triester of hydrogenated soybean oil and glycerin (Sanfat GTS-IP, manufactured by Taiyo Kagaku) is added to the particles in an amount of 0.2%, and the surfaces thereof are coated with the triester. The amount of propane gas in the expandable styrene-maleic anhydride copolymer particles coated with triester was 0.391+1%, and the amount of pentane gas was 5.1811%.
この粒子を９８℃の水蒸気で２回加熱して１００倍の嵩
比重を有する発泡粒子を得た。このときのプロパンガス
量は、検出されず、ペンタンガス量は、２．９５１１％
であった。The particles were heated twice with steam at 98°C to obtain expanded particles having a bulk specific gravity 100 times higher. At this time, the amount of propane gas was not detected, and the amount of pentane gas was 2.9511%.
Met.
この粒子を１１０℃の温度で１時間加熱処理をした。The particles were heat-treated at a temperature of 110° C. for 1 hour.
その結果、ペンタンガス量は、１．２０℃％に減じられ
た。更に、８時間加熱処理をしたところペンタンガス量
は、０．７５℃％に減じられた。As a result, the amount of pentane gas was reduced to 1.20°C%. Furthermore, when heat treatment was performed for 8 hours, the amount of pentane gas was reduced to 0.75°C%.
実施例 ２
実施例１と全く同様の操作によって発泡性樹脂粒子を得
、この粒子にして大豆硬化油とグリセリンのトリエステ
ル（太陽化学製サンファツトＧＴＳ−ＩＰ）を該粒子の
０．５％を添加して、その表面をトリエステルで被覆す
る。トリエステルで被覆された発泡性スチレン−無水マ
レイン酸共重合体粒子中でのプロパンガス量は、０．３
９℃％であり、ペンタンガス量は、 ５．１８ｗ％であ
った。Example 2 Expandable resin particles were obtained by the same operation as in Example 1, and 0.5% of the particles was added with triester of hydrogenated soybean oil and glycerin (Sanfat GTS-IP manufactured by Taiyo Kagaku). Then, the surface is coated with triester. The amount of propane gas in the expandable styrene-maleic anhydride copolymer particles coated with triester is 0.3
The temperature was 9°C%, and the amount of pentane gas was 5.18w%.
この粒子を９８℃の水蒸気で２回加熱して１００倍の嵩
比重を有する発泡粒子を得た。このときのプロパンガス
量は、検出されず、ペンタンガス量は。The particles were heated twice with steam at 98°C to obtain expanded particles having a bulk specific gravity 100 times higher. At this time, the amount of propane gas was not detected, but the amount of pentane gas was.
２．８７１１％であった・ この粒子を１００℃の温度で１時間加熱処理をした。It was 2.8711%. The particles were heat-treated at a temperature of 100° C. for 1 hour.
その結果、ペンタンガス量は、 １．ＯＯＷ％に減じら
れた。更に、８時間加熱処理をしたところペンタンガス
量は、０．７０１ｉ１％に減じられた。As a result, the amount of pentane gas is: 1. reduced to OOW%. Furthermore, when heat treatment was performed for 8 hours, the amount of pentane gas was reduced to 0.701i1%.
比較例 １
実施例１と全く同様の操作によって発泡粒子を得、この
粒子を何等の表面処理を施さず其の侭実雄側１と同様に
２回発泡して１００倍の発泡粒子を得た。この発泡粒子
中のプロパンガス量は、検出されず、ペンタンガス量は
、３．０８℃％であった。Comparative Example 1 Expanded particles were obtained in exactly the same manner as in Example 1, and without any surface treatment, the particles were expanded twice in the same manner as in the Tomio side 1 to obtain expanded particles 100 times larger. The amount of propane gas in the expanded particles was not detected, and the amount of pentane gas was 3.08°C%.
この発泡粒子を１００℃の温度で１時間加熱処理をした
。その結果、ペンタンガス量は、１．４０１１％であっ
た。更に、８時間加熱処理をしたところペンタンガス量
は、 １．１５１１％であった。The foamed particles were heat-treated at a temperature of 100° C. for 1 hour. As a result, the amount of pentane gas was 1.4011%. Furthermore, when heat treatment was performed for 8 hours, the amount of pentane gas was 1.1511%.
（効果）
以上述べたように、本発明はスチレン−無水マレイン酸
共重合体粒子に易揮発性発泡剤をを５０〜７０℃という
低温度で含浸させた後、得られた発泡性スチレン−無水
マレイン酸共重合体粒子の表面にグリセリンと炭素数１
６〜１８の脂肪酸とからなるトリエステルで被覆するこ
とにより、更に１発泡粒子を高温処理を施すことにより
残留ガスが少ない低ガス品を得ることが出来、ＬＰＧ備
蓄タンクの断熱材として好適な発泡粒子が得られるので
ある。(Effects) As described above, the present invention impregnates styrene-maleic anhydride copolymer particles with an easily volatile blowing agent at a low temperature of 50 to 70°C, and then obtains an expandable styrene-maleic anhydride copolymer. Glycerin and carbon number 1 on the surface of maleic acid copolymer particles
By coating with triester consisting of 6 to 18 fatty acids, it is possible to obtain a low gas product with little residual gas by further subjecting one foamed particle to high temperature treatment, making it suitable as a heat insulating material for LPG storage tanks. Particles are obtained.
Claims (1)
、易揮発性発泡剤を含浸させて、ＬＰＧ備蓄タンクの断
熱材用発泡粒子を製造するにあたり、該共重合体樹脂粒
子をリペレット化した後、５０〜７０℃の範囲で易揮発
性発泡剤を含浸させ、得られた該発泡性共重合体樹脂粒
子の表面をグリセリンと炭素数１６〜１８の脂肪酸とか
らなるトリエステルで被覆し、加熱発泡して発泡粒子と
なし、該発泡粒子を少なくとも８０℃の温度で処理せし
めることを特徴とするＬＰＧ備蓄タンクの断熱材用発泡
粒子の製造方法。 ２、易揮発性発泡剤がプロパン、ブタン、ペンタンであ
る特許請求の範囲第１項記載のＬＰＧ備蓄タンクの断熱
材用発泡粒子の製造方法。[Claims] 1. In producing foamed particles for insulation material of LPG storage tanks by impregnating copolymer resin particles of styrene and maleic anhydride with an easily volatile foaming agent, the copolymer resin particles are impregnated with a readily volatile foaming agent. After re-pelletizing the resin particles, they are impregnated with an easily volatile foaming agent at a temperature of 50 to 70°C, and the surface of the resulting foamable copolymer resin particles is made of glycerin and a fatty acid having 16 to 18 carbon atoms. 1. A method for producing foamed particles for a heat insulating material for an LPG storage tank, which comprises coating the particles with triester, heating and foaming them into foamed particles, and treating the foamed particles at a temperature of at least 80°C. 2. The method for producing foamed particles for a heat insulating material for an LPG storage tank according to claim 1, wherein the easily volatile foaming agent is propane, butane, or pentane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19719586A JPS63183943A (en) | 1986-08-25 | 1986-08-25 | Production of expanded particle for insulating material of lpg stockpiling tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19719586A JPS63183943A (en) | 1986-08-25 | 1986-08-25 | Production of expanded particle for insulating material of lpg stockpiling tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63183943A true JPS63183943A (en) | 1988-07-29 |
Family
ID=16370389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19719586A Pending JPS63183943A (en) | 1986-08-25 | 1986-08-25 | Production of expanded particle for insulating material of lpg stockpiling tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63183943A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003082149A (en) * | 2001-09-07 | 2003-03-19 | Kanegafuchi Chem Ind Co Ltd | Expandable styrene resin particle, and expanded molding |
| ITRM20130410A1 (en) * | 2013-07-12 | 2015-01-13 | Maio Ernesto Di | METHOD FOR THE PREPARATION OF MICROMETRIC OR NANOMETRIC CAVE PARTICLES |
-
1986
- 1986-08-25 JP JP19719586A patent/JPS63183943A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003082149A (en) * | 2001-09-07 | 2003-03-19 | Kanegafuchi Chem Ind Co Ltd | Expandable styrene resin particle, and expanded molding |
| ITRM20130410A1 (en) * | 2013-07-12 | 2015-01-13 | Maio Ernesto Di | METHOD FOR THE PREPARATION OF MICROMETRIC OR NANOMETRIC CAVE PARTICLES |
| WO2015004641A1 (en) * | 2013-07-12 | 2015-01-15 | Orsi Silvia | Method for the preparation of micrometric or nanometric hollow particles |
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