Composition of high-temperature corrosion-resistant transparent primer for automobile wheel hub and preparation method thereof
A technology for transparent primers and automotive wheels, applied in the direction of anti-corrosion coatings, coatings, polyester coatings, etc., can solve problems such as poor corrosion resistance, yellowing of paint films, affecting product performance and aesthetics, etc., without affecting appearance, Good adhesion and simple preparation process
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[0044] The present invention also provides a preparation method of the above-mentioned high-temperature corrosion-resistant transparent primer for automobile wheels, a possible implementation mode, including the following steps:
[0045] (1) Under stirring conditions, add 15.0-30.0 parts of diluent and 12-16 parts of hyperbranched polymer to the reactor successively, and continue stirring for 8-15 minutes;
[0046] (2) Add 0.5-5 parts of blocked isocyanate resin, 25.0-35.0 parts of modified polyester resin, 3.0-8.0 parts of amino resin, 5.0-8.0 parts of epoxy resin, 0.1-2 parts of phosphate polymerization material, 3.0-4.0 parts of paint additives and 10.0-30.0 parts of diluent, stirred for 20-40 minutes, and then filtered to obtain a high-temperature corrosion-resistant transparent primer for automobile wheels.
[0047] Preferably, in step (1), the stirring speed is 200-250r / min; in step (2), the stirring speed is 300-350r / min.
[0048] The purpose of adding diluent and hype...
Embodiment 1
[0073] The raw materials used for the high-temperature corrosion-resistant transparent primer for automobile wheel hubs in embodiment 1 are as shown in table 1, and the preparation process is as follows:
[0074]Add 8 parts of butyl acetate, 6 parts of methyl isobutyl ketone, 2 parts of butanol and 5 parts of ethylene glycol butyl ether into the stirring tank, slowly add 12.7 parts of CyGLAZ BB 900, BB 900 at a stirring speed of 200r / min The hydroxyl content of the solid resin in the medium is 8.45%. After stirring for 10 minutes, slowly add 0.6 parts of BL 3175, 33.5 parts of SETAL 1715 VX-74, 4 parts of CYMEL 303, 5 parts of 1001-X-75, and 1 part of AD- 210, 0.3 parts of TINUVIN-1130, 0.3 parts of TINUVIN-292, 0.5 parts of BYK-306, 0.8 parts of KBM 403, 2.5 parts of BYK-450, 0.8 parts of BYK-392, 4 parts of methylisobutyl Butyl ketone, 3 parts of n-butanol, 3 parts of ethylene glycol butyl ether and 7 parts of butyl acetate. After feeding, the stirring speed is raised to 380...
Embodiment 2-10
[0101] The raw material composition of the high-temperature corrosion-resistant transparent primer for automobile wheels in Examples 2-10 is shown in Table 4, and the preparation method of the primer is similar to that of Example 1.
[0102] Raw material composition in the embodiment 2-10 of table 4
[0103]
[0104]
[0105]
[0106] The adhesion, water resistance and CASS corrosion resistance of the high-temperature corrosion-resistant transparent primer for automobile wheels in Examples 2-10 were detected, and the results are shown in Table 5.
[0107] Paint film adhesion, water resistance and CASS corrosion resistance of table 5 embodiment 2-10
[0108]
[0109] The results in Table 5 show that the paint film provided by the present invention has excellent adhesion, water resistance and CASS corrosion resistance.
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Abstract
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