Solar cell protective sheet and method for manufacturing same, backsheet for solar cell, and solar cell module
A technology for solar cells and protective panels, applied to electrical components, chemical instruments and methods, circuits, etc., to achieve the effects of excellent adhesion durability and long-term stable power generation efficiency
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[0155] (Preparation of Composite Polymer)
[0156] In order to prepare composite polymers, various methods can be used, for example, (i) reacting a precursor polymer that is not a polysiloxane structural unit with a special polysiloxane having a polysiloxane structural unit of formula (1) method, (ii) in the presence of a precursor polymer other than a polysiloxane structural unit, a method of hydrolyzing and condensing a silane compound having a structure of a polysiloxane structural unit of formula (1), wherein R 1 and / or R 2 Each is a hydrolyzable group, and so on.
[0157] The silane compound used in the method (ii) includes various types of silane compounds, and is preferably an alkoxysilane compound.
[0158] In the case of preparing a composite polymer according to the method (i), for example, water and a catalyst are optionally added to the mixture of the precursor polymer and polysiloxane, and reacted at a temperature of 20-150° C. for 30 minutes to About 30 hours ...
Embodiment 1
[0366] [Synthesis Example 1] Synthesis of Composite Polymer Aqueous Dispersion P-1:
[0367] [step 1]
[0368] 81 parts of propylene glycol mono-n-propyl ether (PNP), 360 parts of isopropanol (IPA), 110 parts of phenyltrimethoxysilane (PTMS) and 71 parts of dimethyldimethoxysilane (DMDMS) were fed into the tank In a reactor with a stirrer and a dropping funnel, purged with nitrogen, and heated to 80 °C while stirring in a nitrogen atmosphere.
[0369] [step 2]
[0370] In the next step, 260 parts of methyl methacrylate (MMA), 200 parts of n-butyl methacrylate (BMA), 110 parts of n-butyl acrylate (BA), 30 parts of acrylic acid (AA), 19 parts of 3-methyl A mixture of acryloxypropyltrimethoxysilane (MPTMS), 31.5 parts of tert-butyl peroxy-2-ethylhexanoate (TBPO) and 31.5 parts of PNP was added dropwise to the reactor at the same temperature for 4 hours middle. Subsequently, it was heated and stirred at the same temperature for 2.5 hours to obtain a solution of an acrylic poly...
Embodiment 2
[0378] [Synthesis Example 2-Synthesis Example 5] Synthesis of Composite Polymer Aqueous Dispersion P-2 to P-5:
[0379] Composite polymer aqueous dispersions P-2 to P-5 were prepared in the same manner as in Preparation Example 1, and they were different from each other in the proportion of polysiloxane structural units in one molecule of the composite polymer, different The difference is that the amount of monomers used in the preparation of composite polymer aqueous dispersion P-1 was changed to the amount shown in Table 1.
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