Method for producing pellets of acrylic block copolymer
A technology of a block copolymer and a manufacturing method, which is applied in the field of manufacturing acrylic block copolymer pellets, and can solve the problems such as occurrence of die build-up and reduced transparency of a molded body.
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[0107] Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these at all. In addition, various physical properties in Examples and Comparative Examples were measured or evaluated by the following methods.
[0108] "Weight average molecular weight (Mw), number average molecular weight (Mn) and molecular weight distribution (Mw / Mn)"
[0109] The weight-average molecular weight, number-average molecular weight, and molecular weight distribution of the acrylic block copolymer were determined as polystyrene-equivalent molecular weights by gel permeation chromatography (hereinafter abbreviated as GPC). The details are as follows.
[0110] ・Device: GPC device "HLC-8020" manufactured by Tosoh Corporation
[0111] ・Separation column: "TSKgel GMHXL", "G4000HXL" and "G5000HXL" manufactured by Tosoh Corporation are connected in series
[0112] ·Eluent: tetrahydrofuran
[0113] ·Eluent flow rate: 1.0ml / min
[0114] ·Column temperatu...
manufacture example 1
[0152] [Production Example 1] [Acrylic Block Copolymer (A1)]
[0153] (1) After substituting the inside of the 100L polymerization tank with nitrogen, 46.5 kg of toluene and 1.08 kg of 1,2-dimethoxyethane were added while stirring at room temperature, and then, a mixture containing isobutylbis( To 1.60 kg of a toluene solution of 808.5 mmol of 2,6-di-tert-butyl-4-methylphenoxy)aluminum, 0.06 kg of a cyclohexane solution of sec-butyllithium containing 103.95 mmol of sec-butyllithium was further added.
[0154] (2) Next, 1.08 kg of methyl methacrylate was added thereto. The reaction liquid was originally colored yellow, but it became colorless after stirring at room temperature for 60 minutes.
[0155] (3) Then, the internal temperature of the polymerization liquid was cooled to -30°C, 13.53 kg of n-butyl acrylate was added dropwise over 2 hours, and stirred at -30°C for 5 minutes after the dropwise addition was completed.
[0156] (4) Further, 1.49 kg of methyl methacrylate w...
manufacture example 2
[0160] [Production Example 2] [Acrylic Block Copolymer (A2)]
[0161] (1) After substituting the inside of the 100L polymerization tank with nitrogen, 43.4 kg of toluene and 2.17 kg of 1,2-dimethoxyethane were added while stirring at room temperature, followed by addition of isobutylbis( To 4.0 kg of a toluene solution of 2,6-di-t-butyl-4-methylphenoxy)aluminum 2008.0 mmol, 0.14 kg of a cyclohexane solution of sec-butyllithium containing 249.8 mmol of sec-butyllithium was further added.
[0162] (2) Next, 2.31 kg of methyl methacrylate was added thereto. The reaction liquid was originally colored yellow, but it became colorless after stirring at room temperature for 60 minutes.
[0163] (3) Next, the internal temperature of the polymerization solution was cooled to -30°C, 10.49 kg of n-butyl acrylate was added dropwise over 2 hours, and the mixture was stirred at -30°C for 5 minutes after the dropwise addition.
[0164] (4) Further, 2.19 kg of methyl methacrylate was added t...
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