Defoaming agent suitable for curtain coating of mirror back coating, preparation method of defoaming agent and mirror back coating
A technology of defoaming agent and spray-coated mirror, applied in the direction of coating, etc., can solve the problems such as the need to improve the anti-foaming performance, the broken screen, the poor quality of the mirror back coating, so as to reduce the broken screen phenomenon and reduce the bubbles on the board surface , the effect of improving compatibility
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Embodiment 1
[0042] A kind of defoamer suitable for curtain coating mirror back coating, its raw material content is shown in table 1.
[0043] Wherein, the fluorine-containing acrylic acid monomer is trifluoroethanol acrylate;
[0044] The hydroxyl-containing acrylic acid monomer is hydroxypropyl acrylate;
[0045] The acrylic monomer without fluorine and hydroxyl is butyl acrylate;
[0046] The initiator is azobisisobutyronitrile (AIBN).
[0047] A kind of preparation method that is applicable to the defoamer of curtain coating mirror back coating, it comprises the following steps:
[0048]Add xylene and butyl acetate into the reaction kettle, stir until mixed evenly, and then raise the temperature to 100°C to obtain Mixture I; add fluorine-containing acrylic monomer, hydroxyl-containing acrylic monomer, , the initiator is added in the mixer, and stirred until it is evenly mixed to obtain the mixture II;
[0049] Under the condition of heat preservation, add the mixture II to the mix...
Embodiment 2-4
[0051] Embodiment 2-4 is applicable to the defoamer of coating mirror back coating, and its difference with embodiment 1 is:
[0052] The types and contents of the raw materials of the defoamer are different, and the contents of the raw materials are shown in Table 1;
[0053] Among the types of raw materials: the fluorine-containing acrylic monomer in Example 2 is trifluoroethyl methacrylate, and the hydroxyl-containing acrylic monomer is hydroxyethyl methacrylate; the fluorine-containing acrylic monomer in Example 3 is pentafluoropropyl acrylate 1. The hydroxyl-containing acrylic acid monomer is hydroxypropyl acrylate; the fluorine-containing acrylic monomer of embodiment 4 is a mixture of pentafluoropropyl acrylate and methacrylate-free fluorine-free propyl ester, and the two are mixed in equal amounts; the hydroxyl-containing acrylic monomer is Hydroxypropyl methacrylate and hydroxyethyl acrylate mixed in equal amounts;
[0054] All the other are identical with embodiment...
Embodiment 5
[0056] A kind of defoamer that is applicable to the mirror back coating of flow coating, its difference with embodiment 2 is that the content of hydroxyl-containing acrylic acid monomer is 40.5kg, all the other are the same as embodiment 2.
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