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[0003] However, it generally takes more than 12 hours to dry the water-based shock-absorbing paint composition at room temperature, so a sintering and drying process of about 140° C. for 20 minutes is usually required, and a drying oven is required for it. The curing process of the coating composition is controlled by the sintering and drying process using this drying oven, which is restricted in the automotive coating line, etc.
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Embodiment 1
[0058] According to Table 1, the normal temperature curable coating type vibration-absorbing coating composition containing the epoxy resin of the main ingredient, the curing agent (polyamine) and the filler was adjusted.
[0059] The epoxy resin is set as a dimer acid type epoxy resin ( , Epoxy equivalent: 390~470) and novolak type epoxy resin ( , Epoxy equivalent: 172 ~ 178) 2 kinds.
[0060] After mixing and dispersing the above-mentioned coating composition with a high-speed mixer, what was defoamed and stirred was used as a coating for coating.
[0061] This paint was applied on one side of an aluminum substrate having a thickness of 3 mm so that the thickness of the cured coating film was about 6 mm.
[0062] For the prepared test piece, according to the vibration damping characteristic test method of the damping steel plate stipulated in JIS G 0602, at 20°C to 100°C, the vibration damping performance is measured by the central vibration half-width method (2000Hz con...
Embodiment 2
[0065] According to Table 1, replace the epoxy resin of the main ingredient, except that, in the same way as in Example 1, adjust the normal temperature curable coating type damping coating composition comprising the epoxy resin of the main ingredient, curing agent and filler .
[0066] In the same manner as in Example 1, the loss coefficient η representing the damping performance was measured.
[0067] The measurement results are shown in figure 2 .
Embodiment 3
[0069] According to Table 1, replace the epoxy resin of the main ingredient, except that, in the same way as in Example 1, adjust the normal temperature curable coating type damping coating composition comprising the epoxy resin of the main ingredient, curing agent and filler .
[0070] In the same manner as in Example 1, the loss coefficient η representing the damping performance was measured.
[0071] The measurement results are shown in image 3 .
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Abstract
A two-package type, air-drying, vibration -damping coating composition comprising a filler and two or more kinds of epoxy resin / epoxy resin curing agent combinations which give products different in glass transition temperature through curing. [EFFECT] Since the coating composition of the invention can be cured at ordinary temperature in a short time, a drying oven for baking can be dispensed withunlike in the prior art, which makes it possible to impart vibration-damping performance without restriction on the automobile coating line by drying and baking. Further, the coating composition attains high vibration-damping performance over a wide temperature range, particularly at high temperature, and can therefore exert excellent vibration-damping performance in various fields including automobiles and other machines, appliances and parts for high-temperature use.
Description
technical field [0001] The present invention relates to a two-component normal temperature curing coating type shock-absorbing coating composition, in particular to a two-component normal temperature curing coating type vibration-damping coating composition as follows: it can be cured at normal temperature for a short time, so It does not require a drying furnace for sintering as in the conventional example, and can obtain high damping performance in a wide temperature range, especially at high temperatures, so even if it is used at a high temperature Parts of mechanical appliances can also exert excellent shock absorption performance. Background technique [0002] In International Publication WO2003 / 080746, as a coating composition imparting this shock absorption property, a sintering and drying type water-based shock-absorbing coating composition is proposed. The sintering-drying type water-based shock-absorbing coating composition is characterized in that it contains The...
Claims
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