Adhesive, laminated film, and method for producing laminated film
A technology for adhesives and laminated films, applied in the field of adhesives for lamination, can solve the problems of excessive, difficult to obtain processing appearance, not yet obtained, etc., and achieves the effects of excellent productivity, excellent processing adaptability, and excellent bonding strength.
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manufacture example 1
[0164] (Manufacture example 1 [synthesis of polyisocyanate (A-1)])
[0165] In a flask equipped with a stirrer, a thermometer, and a nitrogen gas introduction tube, 4,4-diphenylmethane diisocyanate (hereinafter, abbreviated as "MDI"): 41.9 parts, 2,4'-MDI: 13.0 parts, benzene diisocyanate Methylene diisocyanate (hereinafter, abbreviated as "XDI"): 0.1 part was put into the reaction container, it stirred under nitrogen, and it heated at 60 degreeC. Add 20.0 parts of bifunctional polypropylene glycol with a number average molecular weight of 400 (hereinafter, abbreviated as "PPG") and 25.0 parts of bifunctional PPG with a number average molecular weight of 2000 in several drops, heat up to 80°C, and stir for 5- After 6 hours, the carbamate reaction was completed. The obtained polyisocyanate had an NCO group content of 14%, and a melt viscosity at 40° C. of 1500 mPa·s. Hereinafter, this is abbreviated as polyisocyanate A-1.
manufacture example 2
[0166] (Manufacture example 2 [synthesis of polyisocyanate (A-2)])
[0167] In a flask equipped with a stirrer, a thermometer, and a nitrogen introduction tube, 50.0 parts of MDI and 10.0 parts of biuret bodies of HDI were charged into a reaction container, stirred under nitrogen, and heated to 60°C. 5.0 parts of bifunctional PPG with a number average molecular weight of 400 and 35.0 parts of bifunctional PPG with a number average molecular weight of 1000 were added dropwise several times, and the temperature was raised to 80° C. and stirred for 5 to 6 hours to complete the carbamate reaction. The obtained polyisocyanate had an NCO group content of 14.0%, and a melt viscosity at 40° C. of 1400 mPa·s. Hereinafter, this polyisocyanate is abbreviated as A-2.
manufacture example 3
[0168] (Manufacture example 3 [synthesis of polyisocyanate (A-3)])
[0169] In a flask equipped with a stirrer, a thermometer, and a nitrogen gas introduction tube, 60.0 parts of MDI was put into the reaction container, stirred under nitrogen gas, and heated to 60°C. 5.0 parts of bifunctional PPG with a number average molecular weight of 400 and 35.0 parts of bifunctional PPG with a number average molecular weight of 1000 were added dropwise several times, the temperature was raised to 80° C., and the mixture was stirred for 5 to 6 hours to complete the carbamate reaction. The obtained polyisocyanate had an NCO group content of 14.0%, and a melt viscosity at 40° C. of 1500 mPa·s. Hereinafter, this polyisocyanate is abbreviated as A-3.
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Abstract
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