Surface protection sheet
A protective sheet and one-sided technology, applied in the direction of film/sheet adhesive, adhesive type, application, etc., can solve the problem of insufficient weather resistance, achieve excellent weather resistance, and suppress the increase in adhesive force , the effect of preventing glue marks
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[0067] [Production Example 1]: Production of polymer 1
[0068] 40 g of styrene and 400 g of cyclohexane were put into the autoclave and replaced with nitrogen, and 0.003 mol of sec-butyl lithium dissolved in cyclohexane was put. After reacting at 60°C for 1 hour, 400 g of butadiene and 2000 g of cyclohexane were additionally charged, and the reaction was carried out at 60°C for another 2 hours. After the reaction, 40 g of styrene and 400 g of cyclohexane were added and reacted at 60° C. for another 1 hour. Using this reaction, an SBS block polymer was prepared. As a catalyst, 1.5 mmol of nickel acetylacetonate and 3 mmol of triethylaluminum were reacted in 500 ml of cyclohexane at 25°C for 10 minutes, and this was added to the reaction system of the SBS block copolymer obtained above. After that, use 30kg / cm of hydrogen in the autoclave 3 Pressurize, increase the reaction temperature to 50°C, and stop hydrogenation after 20 minutes. In this way, polymer 1 as shown in Table 2 ...
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[0069] [Production Example 2]: Production of polymer 2
[0070] Except having changed as shown in Table 2, it carried out similarly to manufacture example 1, and obtained the polymer 2 shown in Table 2.
Example Embodiment
[0071] [Production Example 3]: Production of polymer 3
[0072] Except having changed as shown in Table 2, it carried out similarly to manufacture example 1, and obtained the polymer 3 shown in Table 2.
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