Colloidal (METH)acrylic polymer emulsion and water-based hot stamping primer coating
An acrylic polymer and acrylic technology, applied in polyurea/polyurethane coatings, primers, coatings, etc., can solve site safety issues, negative impacts, strong odors in printing workshops, etc.
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[0064] The following examples illustrate the invention.
[0065] All percentages are by weight unless otherwise indicated. In the examples, the following abbreviations are used:
[0066] MMA = methyl methacrylate
[0067] MAA = methacrylic acid
[0068] EA = ethyl acrylate
[0069] 3-MA=3-mercaptopropionic acid
[0070] MBM=Methoxybutyl 3-mercaptopropionate
[0071] TDM = tertiary dodecyl mercaptan
[0072] 2-EHT = 2-ethylhexyl thioglycolate
[0073] Molecular weight (Mw) was measured by Gel Permeation Chromatography (GPC) using poly(acrylic acid)-Na salt as a standard.
example 1 to 4 and comparative example 1 to 5
[0074] Examples 1 to 4 and Comparative Examples 1 to 5: Preparation of neutralized colloidal (meth)acrylic polymer emulsions
[0075] Examples 1 to 4 and Comparative Examples 1 to 5 were carried out under the same procedure below except that different materials and their amounts as shown in Table 1 were used in each example and comparative example.
[0076] In a 1000ml four-neck glass reactor equipped with reflux, thermocouple and stirrer, 500g water, 0.25g Surfactant A and 0.25g Surfactant B were charged, followed by stirring until homogeneous and heating to 80-85°C.
[0077] Meanwhile, 100 g of water was charged into an open glass container with a stirrer, followed by adding 1.75 g of Surfactant A and 1.75 g of Surfactant B and stirring until uniform. The mixture of monomer and chain transfer agent was then gradually charged into an open glass vessel with stirring at 200 rpm and continued stirring at 600 rpm for another 30 minutes to form a pre-emulsion.
[0078] When the t...
example 5
[0082] 68 g of the neutralized colloidal (meth)acrylic polymer emulsion obtained from Example 1 was placed in a 300 ml polyethylene cup. 16 g of water and 16 g of isopropanol were charged into a cup with stirring at 400 rpm to mix until homogeneous and finally a clear transparent liquid was formed.
[0083] The resulting liquid was applied by a 12 μm bar coater onto a PET film pre-coated with a commercially available water-based wax, and then placed in an oven to dry at 50° C. for 2 min. Coated and dried film at 10 -5 Metallization with Al was performed in a metallization chamber under vacuum to achieve a thickness of 60-100 nm.
[0084] A commercially available polyurethane-based hot melt adhesive was then coated onto the Al side by a 12 μm bar coater. A hot stamping film is then obtained.
[0085] The hot-stamping film is hot-stamped from the side of the PET film for less than 1 second, the temperature of the hot-stamping plate is about 100-120°C, and the image is then tr...
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Abstract
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