JP6612764B2 - 発泡性熱可塑性樹脂粒子、熱可塑性予備発泡粒子、熱可塑性発泡成形体 - Google Patents
発泡性熱可塑性樹脂粒子、熱可塑性予備発泡粒子、熱可塑性発泡成形体 Download PDFInfo
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- JP6612764B2 JP6612764B2 JP2016551906A JP2016551906A JP6612764B2 JP 6612764 B2 JP6612764 B2 JP 6612764B2 JP 2016551906 A JP2016551906 A JP 2016551906A JP 2016551906 A JP2016551906 A JP 2016551906A JP 6612764 B2 JP6612764 B2 JP 6612764B2
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- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-M hexanoate Chemical compound CCCCCC([O-])=O FUZZWVXGSFPDMH-UHFFFAOYSA-M 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 229940097275 indigo Drugs 0.000 description 1
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- GWVMLCQWXVFZCN-UHFFFAOYSA-N isoindoline Chemical compound C1=CC=C2CNCC2=C1 GWVMLCQWXVFZCN-UHFFFAOYSA-N 0.000 description 1
- 125000000400 lauroyl group Chemical group O=C([*])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 235000020778 linoleic acid Nutrition 0.000 description 1
- OYHQOLUKZRVURQ-IXWMQOLASA-N linoleic acid Natural products CCCCC\C=C/C\C=C\CCCCCCCC(O)=O OYHQOLUKZRVURQ-IXWMQOLASA-N 0.000 description 1
- HBOQXIRUPVQLKX-UHFFFAOYSA-N linoleic acid triglyceride Natural products CCCCCC=CCC=CCCCCCCCC(=O)OCC(OC(=O)CCCCCCCC=CCC=CCCCCC)COC(=O)CCCCCCCC=CCC=CCCCCC HBOQXIRUPVQLKX-UHFFFAOYSA-N 0.000 description 1
- 235000019359 magnesium stearate Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- GYNNXHKOJHMOHS-UHFFFAOYSA-N methyl-cycloheptane Natural products CC1CCCCCC1 GYNNXHKOJHMOHS-UHFFFAOYSA-N 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- NWZZFAQUBMRYNU-UHFFFAOYSA-N n-octadecylnonadec-18-en-1-amine Chemical compound CCCCCCCCCCCCCCCCCCNCCCCCCCCCCCCCCCCCC=C NWZZFAQUBMRYNU-UHFFFAOYSA-N 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-N o-dicarboxybenzene Natural products OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- WGOROJDSDNILMB-UHFFFAOYSA-N octatriacontanediamide Chemical compound NC(=O)CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC(N)=O WGOROJDSDNILMB-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-M oleate Chemical compound CCCCCCCC\C=C/CCCCCCCC([O-])=O ZQPPMHVWECSIRJ-KTKRTIGZSA-M 0.000 description 1
- 229940049964 oleate Drugs 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- DGBWPZSGHAXYGK-UHFFFAOYSA-N perinone Chemical compound C12=NC3=CC=CC=C3N2C(=O)C2=CC=C3C4=C2C1=CC=C4C(=O)N1C2=CC=CC=C2N=C13 DGBWPZSGHAXYGK-UHFFFAOYSA-N 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000767 polyaniline Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 125000003011 styrenyl group Chemical group [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- DLSMLZRPNPCXGY-UHFFFAOYSA-N tert-butylperoxy 2-ethylhexyl carbonate Chemical compound CCCCC(CC)COC(=O)OOOC(C)(C)C DLSMLZRPNPCXGY-UHFFFAOYSA-N 0.000 description 1
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 1
- WPZJSWWEEJJSIZ-UHFFFAOYSA-N tetrabromobisphenol-F Natural products C1=C(Br)C(O)=C(Br)C=C1CC1=CC(Br)=C(O)C(Br)=C1 WPZJSWWEEJJSIZ-UHFFFAOYSA-N 0.000 description 1
- AAAQKTZKLRYKHR-UHFFFAOYSA-N triphenylmethane Chemical compound C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 AAAQKTZKLRYKHR-UHFFFAOYSA-N 0.000 description 1
- DCXXMTOCNZCJGO-UHFFFAOYSA-N tristearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCCCCCCCCCC)COC(=O)CCCCCCCCCCCCCCCCC DCXXMTOCNZCJGO-UHFFFAOYSA-N 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 229940098697 zinc laurate Drugs 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
- GPYYEEJOMCKTPR-UHFFFAOYSA-L zinc;dodecanoate Chemical compound [Zn+2].CCCCCCCCCCCC([O-])=O.CCCCCCCCCCCC([O-])=O GPYYEEJOMCKTPR-UHFFFAOYSA-L 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/16—Making expandable particles
- C08J9/18—Making expandable particles by impregnating polymer particles with the blowing agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/22—Layered products comprising a layer of synthetic resin characterised by the use of special additives using plasticisers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/22—After-treatment of expandable particles; Forming foamed products
- C08J9/224—Surface treatment
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/22—After-treatment of expandable particles; Forming foamed products
- C08J9/228—Forming foamed products
- C08J9/232—Forming foamed products by sintering expandable particles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D17/00—Pigment pastes, e.g. for mixing in paints
- C09D17/003—Pigment pastes, e.g. for mixing in paints containing an organic pigment
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/42—Nitriles
- C08F220/44—Acrylonitrile
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2325/02—Homopolymers or copolymers of hydrocarbons
- C08J2325/04—Homopolymers or copolymers of styrene
- C08J2325/08—Copolymers of styrene
- C08J2325/12—Copolymers of styrene with unsaturated nitriles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/141—Hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/16—Homopolymers or copolymers of alkyl-substituted styrenes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Materials Engineering (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Molding Of Porous Articles (AREA)
Description
気泡調整剤(造核剤)は、重合体を構成する単量体100重量部に対して、0.07重量部以上が好ましく、より好ましくは0.1重量部以上であり、0.3重量部以下が好ましく、より好ましくは0.2重量部以下、さらに好ましくは0.15重量部以下である。
発泡助剤は、発泡剤100重量部に対して、1重量部以上が好ましく、より好ましくは5重量部以上、さらに好ましくは10重量部以上であり、40重量部以下が好ましく、より好ましくは30重量部以下、さらに好ましくは25重量部以下である。
すなわち、発泡性熱可塑性樹脂粒子の製造方法としては、スチレン系単量体およびアクリル酸エステル系単量体を懸濁剤、重合開始剤および、必要に応じて、その他の添加剤の存在下で重合反応を開始し、懸濁重合中に発泡剤を添加する、または、重合後に発泡剤を含浸させる方法が好ましい。
顔料を使用する場合、顔料は、重合体を構成する単量体100重量部に対して、0.001重量部以上が好ましく、より好ましくは0.003重量部以上であり、0.1重量部以下が好ましく、0.07重量部以下がより好ましい。
可塑剤は、重合体を構成する単量体100重量部に対して、0.001重量部以上が好ましく、より好ましくは0.005重量部以上であり、0.1重量部以下が好ましく、0.05重量部以下がより好ましい。
また、可塑剤は、顔料1重量部に対して、0.01重量部以上が好ましく、より好ましくは0.1重量部以上であり、5重量部以下が好ましく、より好ましくは3重量部以下である。
なお、測定評価法は、以下の通りに実施した。
得られた発泡性熱可塑性樹脂粒子中の単量体成分は、発泡性熱可塑性樹脂粒子1.0gをジクロロメタン20mlに溶解し、内部標準液(シクロペンタノール)0.005gを加えた後、ガスクロマトグラフィー(GC)を用いて、以下の条件にて測定した。
GC:島津製作所社製 GC−14B
カラム:PEG−20M 25%
Chromosorb W 60/80(3.0m×3.0mmI.D.)
カラム温度:110℃
検出器(FID)温度:170℃。
得られた発泡性熱可塑性樹脂粒子に対して、発泡性熱可塑性樹脂粒子0.02gをテトラヒドロフラン(以下、「THF」と略す場合がある)20mlに溶解させた後、ゲルパーミェーションクロマトグラフ(GPC)を用いて、以下の条件にてGPC測定を行い、GPC測定チャートおよび、重量平均分子量(Mw)および数平均分子量(Mn)を得た。尚、得られた値はポリスチレン換算の相対値である。
測定装置:東ソー社製、高速GPC装置 HLC−8220
使用カラム:東ソー社製、SuperHZM−H×2本、SuperH−RC×2本
カラム温度:40℃、移動相:THF(テトラヒドロフラン)
流量:0.35ml/分、注入量:10μL
検出器:RI。
攪拌機付き予備発泡機に発泡性熱可塑性樹脂粒子を投入し、水蒸気で加熱することにより発泡させ、見掛け倍率10倍の予備発泡粒子を得た。
成形機[ダイセン製、KR−57]を用いて、厚み20mmで縦450mm×横300mmサイズの板状の金型内に充填し、吹き込み蒸気圧力0.8kgf/cm2として型内成形をして、発泡成形体を得た。成形体の表面状態を目視にて観察、評価するとともに以下の評価を実施した。
得られた熱可塑性樹脂発泡体を破断し、破断面を観察して、粒子界面ではなく、粒子が破断している割合を求めて、以下の基準にて、融着性を判定した。
◎:粒子破断の割合が90%以上。
○:粒子破断の割合が80%以上、90%未満。
△:粒子破断の割合が70%以上、80%未満。
×:粒子破断の割合が70%未満。
得られた熱可塑性樹脂発泡体の表面状態を目視観察し、以下の基準にて表面性を評価した。
◎:表面の溶融、粒間が無く、非常に美麗。
○:表面の溶融、粒間が少なく、美麗。
△:表面の溶融、粒間があり、外観やや不良。
×:表面の溶融、粒間が多く、外観不良。
発泡成形体の平均セル径は、発泡成形体の切断面をマイクロスコープで観察し、切断面の一直線上(60mm)にかかる気泡数から平均弦長を測定し、平均セル径とした。
平均弦長t=線長/(気泡数×写真の倍率)。
発泡成形体を150×150×20(t)mmに切り出したサンプル片を、JIS K6767(高温時の寸法安定性:B法)に準拠し、90℃で24時間後の加熱寸法変化率を測定した。
◎:加熱寸法変化率が0.10%未満。
○:加熱寸法変化率が0.10%以上、0.15%未満。
△:加熱寸法変化率が0.15%以上、0.20%未満。
×:加熱寸法変化率が0.2%未満。
撹拌機付属の6Lのオートクレーブに、純水108重量部、第3リン酸カルシウム0.08重量部、α−オレフィンスルフォン酸ソーダ0.006重量部および、開始剤として、ジ−t−ブチルパーオキシヘキサハイドロテレフタレート0.773重量部および1,1−ビス(t−ブチルパーオキシ)シクロヘキサン0.16重量部及び、造核剤としてエチレンビスステアリルアマイド0.12重量部を仕込んだ。続いて、250回転/分で撹拌しながら、アルファメチルスチレン単量体70重量部、アクリロニトリル単量体30重量部を仕込んだ後、98℃まで昇温させた。引き続き、98℃にて9時間保持して、熱可塑性樹脂粒子を得た。その後、114℃に昇温し、114℃にて3時間保持した。
得られた発泡性熱可塑性樹脂粒子を篩分けして、粒子径0.6mm〜1.4mmの発泡性熱可塑性樹脂粒子を分取した。
得られた熱可塑性樹脂予備発泡粒子を、成形機[ダイセン製、KR−57]を用いて、厚み20mmで縦450mm×横300mmサイズの板状の金型内に充填し、吹き込み蒸気圧力0.8kgf/cm2として型内成形をして、発泡成形体を得た。
<発泡性熱可塑性樹脂粒子の製造>において、重合開始時の単量体組成をアルファメチルスチレン単量体78重量部およびアクリロニトリル単量体22重量部に変更した以外は、実施例1と同様の操作により、発泡性熱可塑性樹脂粒子、予備発泡粒子、型内発泡成形体を得た。評価結果を、表1に示す。
<発泡性熱可塑性樹脂粒子の製造>において、重合開始時の単量体組成をアルファメチルスチレン単量体62重量部およびアクリロニトリル単量体38重量部に変更した以外は、実施例1と同様の操作により、発泡性熱可塑性樹脂粒子、予備発泡粒子、型内発泡成形体を得た。評価結果を、表1に示す。
<発泡性熱可塑性樹脂粒子の製造>において、114℃の保持時間を2時間に変更した以外は、実施例1と同様の操作により、発泡性熱可塑性樹脂粒子、予備発泡粒子、型内発泡成形体を得た。評価結果を、表1に示す。
<発泡性熱可塑性樹脂粒子の製造>において、エチレンビスステアリルアマイド0.20重量部に変更した以外は、実施例1と同様の操作により、発泡性熱可塑性樹脂粒子、予備発泡粒子、型内発泡成形体を得た。評価結果を、表1に示す。
<発泡性熱可塑性樹脂粒子の製造>において、エチレンビスステアリルアマイド0.08重量部に変更した以外は、実施例1と同様の操作により、発泡性熱可塑性樹脂粒子、予備発泡粒子、型内発泡成形体を得た。評価結果を、表1に示す。
<発泡性熱可塑性樹脂粒子の製造>において、実施例1に記載の方法で発泡性熱可塑性樹脂粒子を得た後、スーパーミキサー[カワタ製、SMV−20]に前記発泡性熱可塑性樹脂粒子に可塑剤:フタル酸ブチルベンジル:0.01重量部と顔料:フロタシアニンブルー:0.005重量の混合物を投入し、60秒間ブレンドすることにより発泡性熱可塑性樹脂粒子を得た。その後、実施例1と同様の操作により予備発泡粒子、型内発泡成形体を得た。評価結果を、表1に示す。
<発泡性熱可塑性樹脂粒子の製造>において、実施例1に記載の方法で発泡性熱可塑性樹脂粒子を得た後、スーパーミキサー[カワタ製、SMV−20]に前記発泡性熱可塑性樹脂粒子に可塑剤:ジエチレングリコールジベンゾエート50〜60重量%とジプロピレングリコールジベンゾエート40〜50重量%の混合物(製品名JP120:ジェイ・プラス社):0.01重量部と顔料:フロタシアニンブルー:0.005重量の混合物を投入し、60秒間ブレンドすることにより発泡性熱可塑性樹脂粒子を得た。その後、実施例1と同様の操作により予備発泡粒子、型内発泡成形体を得た。評価結果を、表1に示す。
<発泡性熱可塑性樹脂粒子の製造>において、実施例1に記載の方法で発泡性熱可塑性樹脂粒子を得た後、スーパーミキサー[カワタ製、SMV−20]に前記発泡性熱可塑性樹脂粒子に可塑剤:ジエチレングリコールジベンゾエート50〜60重量%とジプロピレングリコールジベンゾエート40〜50重量%の混合物(製品名JP120:ジェイ・プラス社):0.01重量部と顔料:フロタシアニンブルー:0.05重量の混合物を投入し、60秒間ブレンドすることにより発泡性熱可塑性樹脂粒子を得た。その後、実施例1と同様の操作により予備発泡粒子、型内発泡成形体を得た。評価結果を、表1に示す。
<発泡性熱可塑性樹脂粒子の製造>において、実施例1に記載の方法で発泡性熱可塑性樹脂粒子を得た後、スーパーミキサー[カワタ製、SMV−20]に前記発泡性熱可塑性樹脂粒子に可塑剤:ジエチレングリコールジベンゾエート50〜60重量%とジプロピレングリコールジベンゾエート40〜50重量%の混合物(製品名JP120:ジェイ・プラス社):0.01重量部と顔料:フロタシアニングリーン:0.05重量の混合物を投入し、60秒間ブレンドすることにより発泡性熱可塑性樹脂粒子を得た。その後、実施例1と同様の操作により予備発泡粒子、型内発泡成形体を得た。評価結果を、表1に示す。
<発泡性熱可塑性樹脂粒子の製造>において、重合開始時の単量体組成をアルファメチルスチレン単量体85重量部およびアクリロニトリル単量体15重量部に変更した以外は、実施例1と同様の操作により、発泡性熱可塑性樹脂粒子、予備発泡粒子、型内発泡成形体を得た。評価結果を、表1に示す。
<発泡性熱可塑性樹脂粒子の製造>において、重合開始時の単量体組成をアルファメチルスチレン単量体55重量部およびアクリロニトリル単量体45重量部に変更した以外は、実施例1と同様の操作により、発泡性熱可塑性樹脂粒子、予備発泡粒子、型内発泡成形体を得た。評価結果を、表1に示す。
<発泡性熱可塑性樹脂粒子の製造>において、特開2007−246566公報の実施例1に記載の方法で発泡性熱可塑性樹脂粒子を得た。その後、実施例1と同様の操作により、発泡性熱可塑性樹脂粒子、予備発泡粒子、型内発泡成形体を得た。評価結果を、表1に示す。
Claims (6)
- 重合体を構成する単量体組成がアルファメチルスチレン60〜80重量部と、アクリロニトリル40〜20重量部とからなる発泡性熱可塑性樹脂粒子であって、残存する単量体成分量が0.5重量%以下であり、発泡倍率10倍の発泡成形体にした時の切断面の気泡の平均弦長が20μm以上60μm以下であることを特徴とする発泡性熱可塑性樹脂粒子。
- 発泡倍率2〜15倍で使用することを特徴とする請求項1に記載の発泡性熱可塑性樹脂粒子。
- 前記発泡性熱可塑性樹脂粒子から得られる発泡成形体を24時間、90℃で処理した時の寸法変化率が0.15%未満となることを特徴とする請求項1又は2に記載の発泡性熱可塑性樹脂粒子。
- 前記発泡性熱可塑性樹脂粒子の表層に可塑剤と顔料の混合物がコーティングされていることを特徴とする請求項1〜3のいずれかに記載の発泡性熱可塑性樹脂粒子。
- 請求項1〜4のいずれかに記載の発泡性熱可塑性樹脂粒子を発泡倍率2〜15倍で発泡したことを特徴とする熱可塑性予備発泡粒子。
- 請求項5に記載の熱可塑性予備発泡粒子を型内成形させることにより得られる熱可塑性発泡成形体。
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