JP7373003B2 - 熱可塑性樹脂組成物及びその成形品 - Google Patents
熱可塑性樹脂組成物及びその成形品 Download PDFInfo
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- JP7373003B2 JP7373003B2 JP2022048211A JP2022048211A JP7373003B2 JP 7373003 B2 JP7373003 B2 JP 7373003B2 JP 2022048211 A JP2022048211 A JP 2022048211A JP 2022048211 A JP2022048211 A JP 2022048211A JP 7373003 B2 JP7373003 B2 JP 7373003B2
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- FNGGVJIEWDRLFV-UHFFFAOYSA-N anthracene-1,2-dicarboxylic acid Chemical compound C1=CC=CC2=CC3=C(C(O)=O)C(C(=O)O)=CC=C3C=C21 FNGGVJIEWDRLFV-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 description 1
- 150000001558 benzoic acid derivatives Chemical class 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 150000008366 benzophenones Chemical class 0.000 description 1
- 150000001565 benzotriazoles Chemical class 0.000 description 1
- MQYVNIBIZOJEGZ-UHFFFAOYSA-N bicyclo[2.2.1]hepta-2,4-diene Chemical compound C1C2CC=C1C=C2 MQYVNIBIZOJEGZ-UHFFFAOYSA-N 0.000 description 1
- 230000001588 bifunctional effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 125000004799 bromophenyl group Chemical group 0.000 description 1
- NTXGQCSETZTARF-UHFFFAOYSA-N buta-1,3-diene;prop-2-enenitrile Chemical compound C=CC=C.C=CC#N NTXGQCSETZTARF-UHFFFAOYSA-N 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 150000001244 carboxylic acid anhydrides Chemical group 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 1
- HGCIXCUEYOPUTN-UHFFFAOYSA-N cis-cyclohexene Natural products C1CCC=CC1 HGCIXCUEYOPUTN-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- UVJHQYIOXKWHFD-UHFFFAOYSA-N cyclohexa-1,4-diene Chemical compound C1C=CCC=C1 UVJHQYIOXKWHFD-UHFFFAOYSA-N 0.000 description 1
- VEIOBOXBGYWJIT-UHFFFAOYSA-N cyclohexane;methanol Chemical compound OC.OC.C1CCCCC1 VEIOBOXBGYWJIT-UHFFFAOYSA-N 0.000 description 1
- FOTKYAAJKYLFFN-UHFFFAOYSA-N decane-1,10-diol Chemical compound OCCCCCCCCCCO FOTKYAAJKYLFFN-UHFFFAOYSA-N 0.000 description 1
- VTXVGVNLYGSIAR-UHFFFAOYSA-N decane-1-thiol Chemical compound CCCCCCCCCCS VTXVGVNLYGSIAR-UHFFFAOYSA-N 0.000 description 1
- JBSLOWBPDRZSMB-FPLPWBNLSA-N dibutyl (z)-but-2-enedioate Chemical compound CCCCOC(=O)\C=C/C(=O)OCCCC JBSLOWBPDRZSMB-FPLPWBNLSA-N 0.000 description 1
- 125000001142 dicarboxylic acid group Chemical group 0.000 description 1
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical class C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 description 1
- 239000000539 dimer Substances 0.000 description 1
- LDCRTTXIJACKKU-ARJAWSKDSA-N dimethyl maleate Chemical compound COC(=O)\C=C/C(=O)OC LDCRTTXIJACKKU-ARJAWSKDSA-N 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- PQJYOOFQDXGDDS-ZCXUNETKSA-N dinonyl (z)-but-2-enedioate Chemical compound CCCCCCCCCOC(=O)\C=C/C(=O)OCCCCCCCCC PQJYOOFQDXGDDS-ZCXUNETKSA-N 0.000 description 1
- GWZCCUDJHOGOSO-UHFFFAOYSA-N diphenic acid Chemical compound OC(=O)C1=CC=CC=C1C1=CC=CC=C1C(O)=O GWZCCUDJHOGOSO-UHFFFAOYSA-N 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000010556 emulsion polymerization method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012765 fibrous filler Substances 0.000 description 1
- 125000003709 fluoroalkyl group Chemical group 0.000 description 1
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- JFZUABNDWZQLIJ-UHFFFAOYSA-N methyl 2-[(2-chloroacetyl)amino]benzoate Chemical compound COC(=O)C1=CC=CC=C1NC(=O)CCl JFZUABNDWZQLIJ-UHFFFAOYSA-N 0.000 description 1
- LGDNMDSHQLWPAK-UHFFFAOYSA-N methyl 2-methylprop-2-enoate;5-phenylpenta-2,4-dienenitrile Chemical compound COC(=O)C(C)=C.N#CC=CC=CC1=CC=CC=C1 LGDNMDSHQLWPAK-UHFFFAOYSA-N 0.000 description 1
- ADFPJHOAARPYLP-UHFFFAOYSA-N methyl 2-methylprop-2-enoate;styrene Chemical compound COC(=O)C(C)=C.C=CC1=CC=CC=C1 ADFPJHOAARPYLP-UHFFFAOYSA-N 0.000 description 1
- XJRBAMWJDBPFIM-UHFFFAOYSA-N methyl vinyl ether Chemical compound COC=C XJRBAMWJDBPFIM-UHFFFAOYSA-N 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- SEEYREPSKCQBBF-UHFFFAOYSA-N n-methylmaleimide Chemical compound CN1C(=O)C=CC1=O SEEYREPSKCQBBF-UHFFFAOYSA-N 0.000 description 1
- DFFZOPXDTCDZDP-UHFFFAOYSA-N naphthalene-1,5-dicarboxylic acid Chemical compound C1=CC=C2C(C(=O)O)=CC=CC2=C1C(O)=O DFFZOPXDTCDZDP-UHFFFAOYSA-N 0.000 description 1
- RXOHFPCZGPKIRD-UHFFFAOYSA-N naphthalene-2,6-dicarboxylic acid Chemical compound C1=C(C(O)=O)C=CC2=CC(C(=O)O)=CC=C21 RXOHFPCZGPKIRD-UHFFFAOYSA-N 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 125000005375 organosiloxane group Chemical group 0.000 description 1
- 229910000489 osmium tetroxide Inorganic materials 0.000 description 1
- 239000012285 osmium tetroxide Substances 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- WRAQQYDMVSCOTE-UHFFFAOYSA-N phenyl prop-2-enoate Chemical compound C=CC(=O)OC1=CC=CC=C1 WRAQQYDMVSCOTE-UHFFFAOYSA-N 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000000088 plastic resin Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920001485 poly(butyl acrylate) polymer Polymers 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920001921 poly-methyl-phenyl-siloxane Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 229940096992 potassium oleate Drugs 0.000 description 1
- MLICVSDCCDDWMD-KVVVOXFISA-M potassium;(z)-octadec-9-enoate Chemical compound [K+].CCCCCCCC\C=C/CCCCCCCC([O-])=O MLICVSDCCDDWMD-KVVVOXFISA-M 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- WEHMXWJFCCNXHJ-UHFFFAOYSA-N propa-1,2-dienylbenzene Chemical compound C=C=CC1=CC=CC=C1 WEHMXWJFCCNXHJ-UHFFFAOYSA-N 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- YGSDEFSMJLZEOE-UHFFFAOYSA-M salicylate Chemical compound OC1=CC=CC=C1C([O-])=O YGSDEFSMJLZEOE-UHFFFAOYSA-M 0.000 description 1
- 229960001860 salicylate Drugs 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 125000005372 silanol group Chemical group 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([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])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
- 238000003756 stirring Methods 0.000 description 1
- 239000011145 styrene acrylonitrile resin Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000010558 suspension polymerization method Methods 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
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
[1](A)ポリブチレンテレフタレート樹脂、(B)ゴム含有重合体、及び(C)共重合体を含む熱可塑性樹脂組成物であって、下記条件(1)~(3)を満足する熱可塑性樹脂組成物。
(1)(A)ポリブチレンテレフタレート樹脂のISO178で測定した曲げ弾性率が、2000MPa以下
(2)(C)共重合体が、芳香族ビニル系単量体とその他の単官能性ビニル系単量体との共重合体
(3)(A)+(B)+(C)の合計100質量部中に、(A)5~40質量部、(B)5~40質量部、(C)20~80質量部含む
[2](B)ゴム含有重合体が、共役ジエン系ゴムを含むことを特徴とする[1]に記載の熱可塑性樹脂組成物。
[3] (C)共重合体が、芳香族ビニル系単量体と、シアン化ビニル系単量体及び/又はマレイミド系単量体を含む共重合体を含むことを特徴とする[1]~[2]のいずれか1項に記載の熱可塑性樹脂組成物。
[4](D)グリシジル基含有単量体とその他の単量体との共重合体を、(A)+(B)+(C)の合計100質量部に対して、0.1~5質量部含有することを特徴とする[1]~[3]のいずれか1項に記載の熱可塑性樹脂組成物。
[5](E)ポリオルガノシロキサン系改質剤の含有量を、(A)+(B)+(C)の合計100質量部に対して、0.5~10質量部含有することを特徴とする[1]~[4]のいずれか1項に記載の熱可塑性樹脂組成物。
[6]シボ加工用である、[1]~[5]のいずれか1項に記載の熱可塑性樹脂組成物。
[7]自動車内装用である、[1]~[5]のいずれか1項に記載の熱可塑性樹脂組成物。
[8] [1]~[7]のいずれか1項に記載の熱可塑性樹脂組成物からなる成形品。
なお、これらの1,4-ブタンジオールの外に他のジオール単位を含んでいる場合の共重合量は、ポリブチレンテレフタレート樹脂全セグメント中の1モル%以上、50モル%未満であることが好ましい。中でも、共重合量は好ましくは2モル%以上50モル%未満、より好ましくは3~40モル%、特に好ましくは5~20モル%である。
三角フラスコにグラフト重合体を約2g、アセトンを60ml投入し、24時間浸漬させた。その後、遠心分離器を用いて15,000rpmで30分間、遠心分離することで可溶部と不溶部に分離する。不溶分は、真空乾燥により常温で一昼夜乾燥させることで得られる。可溶分は、アセトン可溶部をメタノールに沈殿させ、真空乾燥により常温で一昼夜乾燥させることで得られる。
グラフト率
グラフト率(%)=(X―Y)/Y×100
X:真空乾燥後のアセトン不溶分量(g)
Y:グラフト重合体中のゴム状重合体量(g)
アセトン可溶分の還元粘度(dl/g)
アセトン可溶分をN,N-ジメチルホルムアミドに溶解し、0.4g/100mlの濃度の溶液とした後、キャノンフェンスケ型粘度管を用い30℃で測定した流下時間より還元粘度を求める。
各実施例及び比較例で得られたペレットを、射出成形機((株)日本製鋼所製「J-180ADS」)を用い、シボ試験片(縦×横×厚み=210mm×100mm×3mm、シボパターンGR-004 100%)を、成形温度250℃、金型温度80℃、射出速度40mm/min、保圧60MPaで成形した。得られた試験片を温度23度、湿度50%の恒温室に24時間静置した後に、光沢度計(日本電色株式会社製VG-7000)を用いて測定角75°で評価した。そして、以下の判断基準で金型転写性を評価した。
A(良好):光沢度6未満
C(不可):光沢度6以上
各実施例及び比較例で得られたペレットを、射出成形機((株)日本製鋼所製「J-180ADS」)を用い、シボ試験片(縦×横×厚み=210mm×100mm×3mm、シボパターンGR-004 100%)を、成形温度250℃、金型温度80℃、射出速度40mm/min、保圧60MPaで成形した。そして、以下の判断基準で表面外観を評価した。
A(良好):表面外観不良なし
C(不可):フローマークやシルバーなど著しい表面外観不良発生
各実施例及び比較例で得られたペレットを、射出成形機((株)山城精機製作所製「SAV-100」)を用い、フィルムゲート試験片(縦×横×厚み=60mm×60mm×2mm) を、270℃で5分間シリンダー内に滞留させた後、成形した。得られた試験片ゲート部をカッターで切込みを入れ、以下の判断基準で滞留熱安定性を評価した。
A(優) :相剥離がほとんど見られない
B(良好):実使用上問題無い軽微な相剥離が見られる
C(不可):明らかな相剥離が見られる
ISO 178に準拠し、4mm厚みで曲げ弾性率を測定し、以下の判断基準で評価した。
A(優) :2000MPa以上
B(良好):1500MPa以上2000MPa未満
C(不可):1500MPa未満
(A-1)三菱エンジニアリングプラスチックス社製 商品名「ノバデュラン5010R8M」(曲げ弾性率:1650MPa)
(A‘-1)三菱エンジニアリングプラスチックス社製 商品名「ノバデュラン5010TRX5」(曲げ弾性率:2200MPa)
(A‘-2)三菱エンジニアリングプラスチックス社製 商品名「ノバデュラン5020」(曲げ弾性率:2300MPa)
ガラスリアクターに、凝集肥大化スチレン-ブタジエンゴムラテックス(スチレン5質量%、ブタジエン95質量%、質量平均粒子径440nm)を固形分換算で60質量部仕込み、撹拌を開始させ、窒素置換を行った。窒素置換後、槽内を昇温し65℃に到達したところで、ブドウ糖0.06質量部、無水ピロリン酸ナトリウム0.03質量部及び硫酸第1鉄0.001質量部を脱イオン水10質量部に溶解した水溶液を添加した後に、70℃に昇温した。その後、アクリロニトリル10質量部、スチレン30質量部、ターシャリードデシルメルカプタン0.3部、t-ブチルハイドロパーオキサイド0.1質量部の混合液及びオレイン酸カリウム1.0質量部(固形分換算)を脱イオン水20質量部に溶解した乳化剤水溶液を4時間かけて連続的に滴下した。滴下後、3時間保持してグラフト重合体ラテックスを得た。その後、塩析、脱水、乾燥し、(B)グラフト重合体のパウダーを得た。得られた(B)グラフト重合体のグラフト率は42%、アセトン可溶部の還元粘度は0.28dl/gであった。また、上記凝集肥大化スチレン-ブタジエンゴムラテックスの質量平均粒子径は下記のように求めた。四酸化オスミウム(OsO4)で染色し、乾燥後に透過型電子顕微鏡で写真撮影した。画像解析処理装置(装置名:旭化成(株)製IP-1000PC)を用いて800個のゴム粒子の面積を計測し、その円相当径(直径)を求め、質量平均粒子径を算出した。
(C-1)スチレン・アクリロニトリル共重合体(AS樹脂):公知の塊状重合法により、スチレン75質量部、アクリロニトリル25質量部からなる共重合体を得た。還元粘度は0.58dl/gであった。
(C-2)アクリロニトリル・スチレン・N-フェニルマレイミド共重合体(イミド系樹脂、還元粘度0.57dl/g)
(D)エチレン・グリシジルメタクリレート共重合体(質量比=88/12)(住友化学株式会社製 商品名「ボンドファースト BF-E」)
(E)ABS樹脂とポリオルガノシロキサンの混合物(株式会社ヘキサケミカル製 商品名「ML-430」)
表1に記載の配合割合(質量部)で混合した後、シリンダー温度230℃に設定したφ26mmの2軸押出機にて主スクリュー回転数300rpm、吐出量25kg/hrの条件で溶融混練し、ペレット化した。得られたペレットを用いて各種物性評価を実施した。結果を表1に示す。
・比較例1、2は、(A)ポリブチレンテレフタレート樹脂の含有量が本願規定の下限量に達しないため、金型転写性に劣るものであった。
・比較例3は、(A)ポリブチレンテレフタレート樹脂の含有量が本願規定の上限量を超えるため、金型転写性と表面外観に劣るものであった。
・比較例4、5は、(A)ポリブチレンテレフタレート樹脂の曲げ弾性率が本願規定の上限を超えるため、金型転写性に劣るものであった。
Claims (7)
- (A)ポリブチレンテレフタレート樹脂、(B)ゴム含有重合体、及び(C)共重合体を含む熱可塑性樹脂組成物であって、下記条件(1)~(4)を満足する熱可塑性樹脂組成物。
(1)(A)ポリブチレンテレフタレート樹脂のISO178で測定した曲げ弾性率が、400MPa以上2000MPa以下
(2)(C)共重合体が、芳香族ビニル系単量体と、その他の単官能性ビニル系単量体との共重合体であって、その他の単官能性ビニル系単量体がシアン化ビニル系単量体、又は、シアン化ビニル系単量体及びマレイミド系単量体を含む
(3)(A)+(B)+(C)の合計100質量部中に、(A)10~40質量部、(B)5~40質量部、(C)20~80質量部含む
(4)(B)ゴム含有重合体が、ゴム質重合体とグラフト成分とを含むグラフト重合体 - (B)ゴム質重合体が、共役ジエン系ゴムを含むことを特徴とする請求項1に記載の熱可塑性樹脂組成物。
- (D)グリシジル基含有単量体とその他の単量体との共重合体を、(A)+(B)+(C)の合計100質量部に対して、0.1~5質量部含有することを特徴とする請求項1~2のいずれか1項に記載の熱可塑性樹脂組成物。
- (E)ポリオルガノシロキサンとスチレン系樹脂を含むポリオルガノシロキサン系改質剤を、(A)+(B)+(C)の合計100質量部に対して、0.5~10質量部含有することを特徴とする請求項1~3のいずれか1項に記載の熱可塑性樹脂組成物。
- シボ加工用である、請求項1~4のいずれか1項に記載の熱可塑性樹脂組成物。
- 自動車内装用である、請求項1~4のいずれか1項に記載の熱可塑性樹脂組成物。
- 請求項1~6のいずれか1項に記載の熱可塑性樹脂組成物からなる成形品。
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