JP2023086827A5 - - Google Patents

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JP2023086827A5
JP2023086827A5 JP2023067440A JP2023067440A JP2023086827A5 JP 2023086827 A5 JP2023086827 A5 JP 2023086827A5 JP 2023067440 A JP2023067440 A JP 2023067440A JP 2023067440 A JP2023067440 A JP 2023067440A JP 2023086827 A5 JP2023086827 A5 JP 2023086827A5
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compound
molecular weight
content
average molecular
styrene
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JP2023067440A
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JP2023086827A (en
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Priority claimed from JP2018237788A external-priority patent/JP2020100679A/en
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スチレン系化合物を有するモノビニル化合物と、分子内に共役ビニル基を少なくとも２つ有する共役ジビニル化合物及び／又は１つ以上の枝分かれ構造を有する多分岐ビニル化合物とのラジカル共重合体を含有し、かつ前記モノビニル化合物中の前記スチレン系化合物の含有量は、前記モノビニル化合物の含有量のうち７０モル％以上であり、
前記スチレン系化合物は、スチレン、α－メチルスチレン、パラメチルスチレン、エチルスチレン、プロピルスチレン、ブチルスチレン、クロロスチレン又はブロモスチレンであり、
前記モノビニル化合物は、メチル（メタ）アクリレート、エチル（メタ）アクリレート、ブチル（メタ）アクリレート、セチル（メタ）アクリレート、（メタ）アクリロニトリル、ジメチルマレエート、ジメチルフマレート、ジエチルフマレート、エチルフマレート、無水マレイン酸、マレイミド、又は核置換マレイミドであり、
前記多分岐ビニル化合物を有する場合は以下の（ａ）および（ｂ）を満たし、
（ａ）前記多分岐ビニル化合物の含有量は、前記モノビニル化合物の総量１モルに対して２．０×１０－６～４．０×１０－４モルである、
（ｂ）前記多分岐ビニル化合物の数平均分子量（Ｍｎ）は、８５０～１０００００である、
前記共役ジビニル化合物を有する場合は以下の（ｃ）および（ｄ）を満たす、
（ｃ）前記共役ジビニル化合物の含有量は、モノビニル化合物の総量１モルに対して、２．０×１０－６～４．０×１０－４モルである、
（ｄ）前記共役ジビニル化合物の数平均分子量（Ｍｎ）は、８５０～１０００００である、
２００℃、４９Ｎ荷重の条件で測定したメルトマスフローレイト（ＭＦＲ）が２．０ｇ／１０分超１０ｇ／１０分以下であり、
スチレンダイマーとトリマーの合計含有量が１００～３０００μｇ／ｇであり、
１９０℃で測定した溶融張力値（ＭＴ）が４０～８０ｇｆであることを特徴とする、スチレン系樹脂組成物。 It contains a radical copolymer of a monovinyl compound having a styrene compound and a conjugated divinyl compound having at least two conjugated vinyl groups in the molecule and/or a multi-branched vinyl compound having one or more branched structures, and The content of the styrene-based compound in the monovinyl compound is 70 mol% or more of the content of the monovinyl compound,
The styrenic compound is styrene, α-methylstyrene, paramethylstyrene, ethylstyrene, propylstyrene, butylstyrene, chlorostyrene or bromostyrene,
The monovinyl compound includes methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, cetyl (meth)acrylate, (meth)acrylonitrile, dimethyl maleate, dimethyl fumarate, diethyl fumarate, ethyl fumarate, maleic anhydride, maleimide, or nuclear-substituted maleimide,
When having the multi-branched vinyl compound, the following (a) and (b) are satisfied,
(a) the content of the multi-branched vinyl compound is 2.0×10 −6 to 4.0×10 −4 mol per 1 mol of the total amount of the monovinyl compound;
(b) the multi-branched vinyl compound has a number average molecular weight (Mn) of 850 to 100,000;
When having the conjugated divinyl compound, the following (c) and (d) are satisfied,
(c) the content of the conjugated divinyl compound is 2.0×10 −6 to 4.0×10 −4 mol per 1 mol of the total amount of the monovinyl compound;
(d) the conjugated divinyl compound has a number average molecular weight (Mn) of 850 to 100,000;
The melt mass flow rate (MFR) measured under the conditions of 200° C. and 49 N load is more than 2.0 g/10 minutes and 10 g/10 minutes or less,
The total content of styrene dimer and trimer is 100 to 3000 μg / g,
A styrenic resin composition characterized by having a melt tension value (MT) measured at 190° C. of 40 to 80 gf. 以下の[２]～[８]のいずれかである、請求項１に記載のスチレン系樹脂組成物。The styrenic resin composition according to claim 1, which is any one of the following [2] to [8].
〔２〕分子量１００万以上の成分の含有量が、スチレン系樹脂組成物１００質量％中に７質量％以上である、 [2] The content of components having a molecular weight of 1,000,000 or more is 7% by mass or more in 100% by mass of the styrene resin composition.
〔３〕分子量２００万以上の成分の含有量が、スチレン系樹脂組成物１００質量％中に２質量％以上である、 [3] The content of components having a molecular weight of 2,000,000 or more is 2% by mass or more in 100% by mass of the styrene resin composition.
〔４〕数平均分子量（Ｍｎ）に対する重量平均分子量（Ｍｗ）の比（Ｍｗ／Ｍｎ）が、３．０～７．０である、 [4] The ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) is 3.0 to 7.0.
〔５〕重量平均分子量（Ｍｗ）に対するｚ平均分子量（Ｍｚ）の比（Ｍｚ／Ｍｗ）が、１．８～６．０である、 [5] The ratio (Mz/Mw) of the z-average molecular weight (Mz) to the weight-average molecular weight (Mw) is 1.8 to 6.0.
〔６〕最大立上り比が１．１～４．０である、 [6] The maximum rise ratio is 1.1 to 4.0.
〔７〕分岐度が０．６０～０．９５である、 [7] the degree of branching is 0.60 to 0.95;
〔８〕ゲル化度が１．１０～１．６０である。 [8] The degree of gelation is from 1.10 to 1.60. 請求項１又は２のいずれかのスチレン系樹脂組成物を含む、発泡シート。A foam sheet comprising the styrenic resin composition according to claim 1 or 2. 請求項３に記載のスチレン系樹脂発泡シートを含む、食品容器。A food container comprising the styrenic resin foam sheet according to claim 3.
JP2023067440A 2018-12-19 2023-04-17 Styrenic resin composition, foam sheet and food container Pending JP2023086827A (en)

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JP2018237788A JP2020100679A (en) 2018-12-19 2018-12-19 Styrenic resin composition, foam sheet and food container
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JP2023086827A JP2023086827A (en) 2023-06-22
JP2023086827A5 true JP2023086827A5 (en) 2023-06-29

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JP2014189767A (en) * 2013-03-28 2014-10-06 Sekisui Plastics Co Ltd Polystyrenic resin composition for foaming, polystyrenic resin foam sheet, and foam molding
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JP7303626B2 (en) * 2018-12-19 2023-07-05 Ｐｓジャパン株式会社 Styrene resin composition, foam sheet and food container

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