Adhesive and preparation method thereof, solar battery back sheet and solar battery
A technology for solar cells and adhesives, applied in the field of materials, can solve the problems that the adhesives cannot fully meet the requirements of the adhesives for solar cell backsheets and the like
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Embodiment 1
[0102] 1. Synthesis of isocyanate-terminated prepolymer A1
[0103] (1) Add 100 parts by weight of ethyl acetate to a reaction kettle equipped with mechanical stirring, thermometer, reflux condenser and nitrogen protection, heat to 75°C, and mix 50 parts by weight of butyl acrylate, 48.8 parts by weight of isomethacrylate Butyl ester, 1.2 parts by weight of 2-hydroxypropyl acrylate and 1.5 parts by weight of azobisisobutyronitrile were uniformly mixed and added dropwise to the reaction system within 5 hours, kept warm for 3 hours and then lowered to room temperature to obtain polyacrylate The solution of polyol i-1 has a solid content of 50% (the weight molecular weight of polyacrylate polyol i-1 is 27000, and the hydroxyl value is 5 mgKOH / g).
[0104] (2) Polyoxypropylene diol, 31 parts by weight of isophorone diisocyanate with 80 parts by weight of polyacrylate polyol i-1 solution, 60 parts by weight of polyoxypropylene diol with a weight average molecular weight of 1000 and...
Embodiment 2
[0110] 1. Synthesis of isocyanate-terminated prepolymer A2
[0111] (1) Use 100 parts by weight of ethyl acetate, 60 parts by weight of n-octyl acrylate, 38.2 parts by weight of hexyl methacrylate, 1.8 parts by weight of 2-hydroxyethyl methacrylate and 0.8 parts by weight of azobisisobutyl Nitrile obtains the solution of polyacrylate polyol i-2 according to the step 1 (1) method of embodiment 1, and solid content is 50% (the weight molecular weight of polyacrylate polyol i-2 is 52000, and hydroxyl value is 8mgKOH / g ).
[0112] (2) Use 100 parts by weight of polyacrylate polyol i-2 solution, 50 parts by weight of polyoxypropylene diol with a weight average molecular weight of 2000, 31 parts by weight of isophorone diisocyanate and 81 parts by weight of ethyl acetate According to step 1 (2) of Example 1, a solution of isocyanate-terminated prepolymer A2 was prepared, with a solid content of 50% (NCOwt% of isocyanate-terminated prepolymer A2 = 7%).
[0113] 2. The synthetic met...
Embodiment 3
[0118] 1. Synthesis of isocyanate-terminated prepolymer A3
[0119] (1) Use 100 parts by weight of ethyl acetate, 40 parts by weight of 2-ethylhexyl acrylate, 57.7 parts by weight of glycidyl methacrylate, 2.3 parts by weight of 2-hydroxyethyl methacrylate and 0.6 parts by weight of even Azodiisobutyronitrile obtains polyacrylate polyol i-3 solution according to the step 1 (1) method of embodiment 1, and solid content is 50wt% (the weight average molecular weight of polyacrylate polyol i-3 is 67000, hydroxyl value is 10mgKOH / g).
[0120] (2) Use 100 parts by weight of polyacrylate polyol i-3 solution, 10 parts by weight of polyoxypropylene diol with a weight average molecular weight of 2000, 24.5 parts by weight of isophorone diisocyanate and 34.5 parts by weight of ethyl acetate According to step 1 (2) of Example 1, a solution of the isocyanate-terminated prepolymer A3 was prepared, with a solid content of 50 wt% (NCO wt% of the isocyanate-terminated prepolymer A3=7%).
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