Blends of polyolefin dispersions and epoxy resin dispersions for improved damage tolerance
A technology of epoxy resin and epoxy adduct, which can be used in epoxy resin coatings, coatings and other directions, and can solve problems such as water-based compositions that cannot provide damage-resistant epoxy resin coatings.
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[0074] Example:The following examples illustrate the invention. In all the examples that follow, unless otherwise indicated, temperature is room temperature and pressure is atmospheric.
Synthetic example
[0075] Synthetic Example: Dispersion Preparation: Dispersions A to J
[0076] Aqueous dispersions A to J having the compositions disclosed in Table 2 below were prepared using the raw materials disclosed in Table 1 below, using the conditions described in Table 2 below, using the following general procedure:
[0077] Components 1 to 3 listed in Table 2 below were fed into a 25 mm diameter twin-screw extruder using a controlled rate feeder; the feed rates used were in grams per minute (g / min) as follows Table 2 shows. Components 1 to 3 are advanced through the extruder and melted to form a liquid molten material.
[0078] The extruder temperature profile was ramped up to the temperatures listed in the "Polymer Melting Region" column of Table 2 below. Water and volatile base and / or neutralizing agent were mixed together and fed into the extruder at the rates shown in Table 2 to neutralize at the point of initial water introduction. Dilution water was then fed into the extru...
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