JP7479477B2 - 低臭気性軟質pvc材料 - Google Patents
低臭気性軟質pvc材料 Download PDFInfo
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- JP7479477B2 JP7479477B2 JP2022539061A JP2022539061A JP7479477B2 JP 7479477 B2 JP7479477 B2 JP 7479477B2 JP 2022539061 A JP2022539061 A JP 2022539061A JP 2022539061 A JP2022539061 A JP 2022539061A JP 7479477 B2 JP7479477 B2 JP 7479477B2
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- low odor
- pvc material
- weight
- antioxidant
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- 239000000463 material Substances 0.000 title claims description 64
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 55
- 239000003963 antioxidant agent Substances 0.000 claims description 50
- 230000003078 antioxidant effect Effects 0.000 claims description 48
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 29
- 239000002781 deodorant agent Substances 0.000 claims description 23
- 239000004014 plasticizer Substances 0.000 claims description 23
- GAWWVVGZMLGEIW-GNNYBVKZSA-L zinc ricinoleate Chemical compound [Zn+2].CCCCCC[C@@H](O)C\C=C/CCCCCCCC([O-])=O.CCCCCC[C@@H](O)C\C=C/CCCCCCCC([O-])=O GAWWVVGZMLGEIW-GNNYBVKZSA-L 0.000 claims description 18
- 229940100530 zinc ricinoleate Drugs 0.000 claims description 18
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 17
- 150000001412 amines Chemical class 0.000 claims description 17
- 239000011347 resin Substances 0.000 claims description 15
- 229920005989 resin Polymers 0.000 claims description 15
- 239000012760 heat stabilizer Substances 0.000 claims description 12
- 238000006116 polymerization reaction Methods 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 9
- 239000000314 lubricant Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 6
- -1 polyol esters Chemical class 0.000 claims description 6
- UJAWGGOCYUPCPS-UHFFFAOYSA-N 4-(2-phenylpropan-2-yl)-n-[4-(2-phenylpropan-2-yl)phenyl]aniline Chemical group C=1C=C(NC=2C=CC(=CC=2)C(C)(C)C=2C=CC=CC=2)C=CC=1C(C)(C)C1=CC=CC=C1 UJAWGGOCYUPCPS-UHFFFAOYSA-N 0.000 claims description 5
- VSAWBBYYMBQKIK-UHFFFAOYSA-N 4-[[3,5-bis[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]-2,4,6-trimethylphenyl]methyl]-2,6-ditert-butylphenol Chemical compound CC1=C(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)C(C)=C(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)C(C)=C1CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 VSAWBBYYMBQKIK-UHFFFAOYSA-N 0.000 claims description 5
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 5
- IHBCFWWEZXPPLG-UHFFFAOYSA-N [Ca].[Zn] Chemical group [Ca].[Zn] IHBCFWWEZXPPLG-UHFFFAOYSA-N 0.000 claims description 4
- MTYUOIVEVPTXFX-UHFFFAOYSA-N bis(2-propylheptyl) benzene-1,2-dicarboxylate Chemical compound CCCCCC(CCC)COC(=O)C1=CC=CC=C1C(=O)OCC(CCC)CCCCC MTYUOIVEVPTXFX-UHFFFAOYSA-N 0.000 claims description 4
- OEIWPNWSDYFMIL-UHFFFAOYSA-N dioctyl benzene-1,4-dicarboxylate Chemical compound CCCCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCCC)C=C1 OEIWPNWSDYFMIL-UHFFFAOYSA-N 0.000 claims description 4
- JNXDCMUUZNIWPQ-UHFFFAOYSA-N trioctyl benzene-1,2,4-tricarboxylate Chemical compound CCCCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCCC)C(C(=O)OCCCCCCCC)=C1 JNXDCMUUZNIWPQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000005995 Aluminium silicate Substances 0.000 claims description 3
- 235000012211 aluminium silicate Nutrition 0.000 claims description 3
- 239000002216 antistatic agent Substances 0.000 claims description 3
- 150000001558 benzoic acid derivatives Chemical class 0.000 claims description 3
- 239000003086 colorant Substances 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000004611 light stabiliser Substances 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229920005862 polyol Polymers 0.000 claims description 3
- 239000012744 reinforcing agent Substances 0.000 claims description 3
- 235000012424 soybean oil Nutrition 0.000 claims description 3
- 239000003549 soybean oil Substances 0.000 claims description 3
- 239000000454 talc Substances 0.000 claims description 3
- 229910052623 talc Inorganic materials 0.000 claims description 3
- 239000012745 toughening agent Substances 0.000 claims description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical class OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 64
- 229920000915 polyvinyl chloride Polymers 0.000 description 63
- 235000019645 odor Nutrition 0.000 description 51
- 230000000694 effects Effects 0.000 description 11
- 238000002156 mixing Methods 0.000 description 10
- 239000000843 powder Substances 0.000 description 10
- 239000000126 substance Substances 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000001877 deodorizing effect Effects 0.000 description 4
- 239000002270 dispersing agent Substances 0.000 description 4
- 238000009472 formulation Methods 0.000 description 4
- 239000002808 molecular sieve Substances 0.000 description 4
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 235000012222 talc Nutrition 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000018199 S phase Effects 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 206010057040 Temperature intolerance Diseases 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical group [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 150000001860 citric acid derivatives Chemical class 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- 230000008543 heat sensitivity Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052909 inorganic silicate Inorganic materials 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical class CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 238000010558 suspension polymerization method Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 150000003573 thiols Chemical class 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- C08K5/005—Stabilisers against oxidation, heat, light, ozone
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Description
所定の重量部で前記低臭気性軟質PVC材料の各成分を秤量するステップ(a)と、
PVC樹脂粉末、可塑剤、熱安定剤及び酸化防止剤を高速ミキサーに加えて8~15min混合し、材料の温度を110℃に上昇し、ここで、可塑剤を2回に分けて投入して、PVC樹脂粉末により可塑剤を十分に吸収させるステップ(b)と、
フィラー及び消臭剤を加え、さらに3~5min高速混合し、消臭剤と粉体とを十分に混合した後、ミキサーを停止して材料を取り出すステップ(c)と、
高速ミキサー内の熱い材料を低速コールドミキサーに移し、ミキサーを起動させて低速混合を行い、材料の温度を50℃以下に下げるステップ(d)と、
ツインスクリューの温度120℃~130℃、シングルスクリューの温度130℃~140℃の二段押出機に上記の混合済み材料を投入して押し出して造粒し、空冷式ホットカットを行い、前記低臭気性軟質PVC材料を得るステップ(e)とを含む。
潤滑剤はエメリーオレオケミカルズ(ドイツ)株式会社から購入したものであり、型番がLOXIOL P 861/3.5(エステル類潤滑剤)であり、
テレフタル酸ジオクチルは、広州市威聯達可塑剤有限公司(Guangzhou Weilianda Plasticizer Co., Ltd.)から購入され、
トリオクチルトリメリテートは、波林香港有限公司(Pauline Hong Kong Co., Ltd.)から購入され、
フタル酸ビス(2-プロピルヘプチル)は、広州市威聯達可塑剤有限公司(Guangzhou Weilianda Plasticizer Co., Ltd.)から購入され、
カルシウム・亜鉛系熱安定剤は、艾迪克上海貿易有限公司(Adeka Shanghai Trading Co., Ltd.)から購入され、型番RUP-108であり、
リシノール酸亜鉛は温州格雷化工社(Wenzhou Gray Chemicals)から購入され、
ナノ炭酸カルシウムの粒子径D50は20nmであり、
炭酸カルシウムの粒子径D50は4.5μmであり、
酸化防止剤1010(ペンタエリトリトールテトラキス[β-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオナート])は、BASF社から購入され、
酸化防止剤330(1,3,5-トリメチル-2,4,6-トリ(3,5-ジ-t-ブチル-4-ヒドロキシベンジル)ベンゼン)は、佛山▲元▼勝化工有限公司(Foshan Yuansheng Chemical Co., Ltd.)から購入され、
酸化防止剤168(トリス[2,4-ジ-t-ブチルフェニル]ホスファイト)は、BASF社から購入され、
酸化防止剤KY-405(4,4’-ビス(α,α-ジメチルベンジル)ジフェニルアミン)は、江蘇飛亜化学工業集団(Jiangsu Feiya Chemical Industry Group)から購入される。
所定の重量部で前記低臭気性軟質PVC材料の各成分を秤量するステップ(a)と、
PVC樹脂粉末、可塑剤、熱安定剤及び酸化防止剤を高速ミキサーに加えて8~15min混合し、材料の温度を110℃に上昇し、ここで、可塑剤を2回に分けて投入して、PVC樹脂粉末により可塑剤を十分に吸収させるステップ(b)と、
フィラー及び消臭剤を加え、さらに3~5min高速混合し、消臭剤と粉体とを十分に混合した後、ミキサーを停止して材料を取り出すステップ(c)と、
高速ミキサー内の熱い材料を低速コールドミキサーに移し、ミキサーを起動させて低速混合を行い、材料の温度を50℃以下に下げるステップ(d)と、
ツインスクリューの温度120℃~130℃、シングルスクリューの温度130℃~140℃の二段押出機に上記の混合済み材料を投入して押し出して造粒し、空冷式ホットカットを行い、前記低臭気性軟質PVC材料を得るステップ(e)とを含む
1、ショア硬度:ASTM D2240
2、臭気等級:PV 3900-2000、等級が低いほど、臭気が低いことを示す。
3、TVOC:TS-INT-002、値が小さいほど、総揮発性物質が少ないことを示す。
本発明の好ましい態様は以下を包含する。
〔1〕成分として、PVC樹脂100重量部、可塑剤60~125重量部、熱安定剤2~10重量部、フィラー10~50重量部、酸化防止剤0~2重量部、潤滑剤0.02~0.06重量部、及び消臭剤0.5~1重量部を含み、前記PVC樹脂の重合度が1300以下であり、前記消臭剤はナノ炭酸カルシウム及びリシノール酸亜鉛を含む、ことを特徴とする低臭気性軟質PVC材料。
〔2〕前記ナノ炭酸カルシウムとリシノール酸亜鉛との重量比が、3~6.5:3~6.5である、ことを特徴とする〔1〕に記載の低臭気性軟質PVC材料。
〔3〕前記ナノ炭酸カルシウムの粒子径D50が15~40nmである、ことを特徴とする〔1〕に記載の低臭気性軟質PVC材料。
〔4〕前記酸化防止剤はヒンダードフェノール系酸化防止剤及び/又はヒンダードアミン系酸化防止剤であり、好ましくは、前記酸化防止剤はヒンダードフェノール系酸化防止剤とヒンダードアミン系酸化防止剤であり、前記ヒンダードフェノール系酸化防止剤とヒンダードアミン系酸化防止剤との重量比が1~3:1~3である、ことを特徴とする〔1〕に記載の低臭気性軟質PVC材料。
〔5〕前記酸化防止剤は0.2~1部である、ことを特徴とする〔4〕に記載の低臭気性軟質PVC材料。
〔6〕前記ヒンダードフェノール系酸化防止剤は、ペンタエリトリトールテトラキス[β-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオナート]、1,3,5-トリメチル-2,4,6-トリ(3,5-ジ-t-ブチル-4-ヒドロキシベンジル)ベンゼン、及びトリス[2,4-ジ-t-ブチルフェニル]ホスファイトのうちの少なくとも1種であり、
前記ヒンダードアミン系酸化防止剤は、4,4’-ビス(α,α-ジメチルベンジル)ジフェニルアミンである、ことを特徴とする〔4〕に記載の低臭気性軟質PVC材料。
〔7〕前記熱安定剤はカルシウム・亜鉛系熱安定剤である、ことを特徴とする〔1〕に記載の低臭気性軟質PVC材料。
〔8〕前記可塑剤は、ベンゾエート類、ポリオールエステル類、エポキシ化大豆油類、クエン酸エステル類、及びポリエステル類のうちの少なくとも1種であり、好ましくは、前記可塑剤は、テレフタル酸ジオクチル、フタル酸ビス(2-プロピルヘプチル)、及びトリオクチルトリメリテートのうちの少なくとも1種である、ことを特徴とする〔1〕に記載の低臭気性軟質PVC材料。
〔9〕前記フィラーは炭酸カルシウム、硫酸バリウム、タルク、及びカオリンのうちの少なくとも1種である、ことを特徴とする〔1〕に記載の低臭気性軟質PVC材料。
〔10〕光安定剤、強化剤、強靭化剤、帯電防止剤、及び着色剤のうちの少なくとも1種をさらに含む、ことを特徴とする〔1〕に記載の低臭気性軟質PVC材料。
Claims (8)
- 成分として、PVC樹脂100重量部、可塑剤60~125重量部、熱安定剤2~10重量部、フィラー10~50重量部、酸化防止剤0.2~1重量部、潤滑剤0.02~0.06重量部、及び消臭剤0.5~1重量部を含み、前記PVC樹脂の重合度が1300以下であり、前記消臭剤はナノ炭酸カルシウム及びリシノール酸亜鉛を含む低臭気性軟質PVC材料であって、
前記ナノ炭酸カルシウムとリシノール酸亜鉛との重量比は3~6.5:3~6.5であり、
前記酸化防止剤はヒンダードフェノール系酸化防止剤及びヒンダードアミン系酸化防止剤を含み、前記ヒンダードフェノール系酸化防止剤とヒンダードアミン系酸化防止剤との重量比が1~3:1~3である、
ことを特徴とする低臭気性軟質PVC材料。 - 前記ナノ炭酸カルシウムの粒子径D50が15~40nmである、ことを特徴とする請求項1に記載の低臭気性軟質PVC材料。
- 前記ヒンダードフェノール系酸化防止剤は、ペンタエリトリトールテトラキス[β-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオナート]、及び1,3,5-トリメチル-2,4,6-トリ(3,5-ジ-t-ブチル-4-ヒドロキシベンジル)ベンゼンからなる群から選択される少なくとも1種であり、
前記ヒンダードアミン系酸化防止剤は、4,4’-ビス(α,α-ジメチルベンジル)ジフェニルアミンである、ことを特徴とする請求項1に記載の低臭気性軟質PVC材料。 - 前記熱安定剤はカルシウム・亜鉛系熱安定剤である、ことを特徴とする請求項1に記載の低臭気性軟質PVC材料。
- 前記可塑剤は、ベンゾエート類、ポリオールエステル類、エポキシ化大豆油類、クエン酸エステル類、及びポリエステル類のうちの少なくとも1種である、ことを特徴とする請求項1に記載の低臭気性軟質PVC材料。
- 前記可塑剤は、テレフタル酸ジオクチル、フタル酸ビス(2-プロピルヘプチル)、及びトリオクチルトリメリテートからなる群から選択される少なくとも1種である、ことを特徴とする請求項1に記載の低臭気性軟質PVC材料。
- 前記フィラーは炭酸カルシウム、硫酸バリウム、タルク、及びカオリンのうちの少なくとも1種である、ことを特徴とする請求項1に記載の低臭気性軟質PVC材料。
- 光安定剤、強化剤、強靭化剤、帯電防止剤、及び着色剤のうちの少なくとも1種をさらに含む、ことを特徴とする請求項1に記載の低臭気性軟質PVC材料。
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