LED cured water-based leather coating and application thereof
A leather coating, water-based technology, applied in the field of coatings, can solve the problems of long drying time, low production efficiency, poor stain resistance and scrub resistance of the coating film, achieve good decoration and protection functions, good cured film properties, and environmental protection Excellent performance
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Embodiment 1
[0023] Mix 45g of water-based polyurethane acrylate (molecular weight: 20,000), 10g of hydroxypropyl acrylate, 20g of hydroxyethyl methacrylate, 20g of neopentyl glycol diacrylate and 2g of photoinitiator (Ciba 184), and heat up to 55°C. Stir well. Next, add 2g of leveling agent (BYK3510), 0.8g of adhesion promoter (PM-2) and 0.2g of defoamer (BYK055), heat up and stir well until a uniform system is formed to obtain LED curable water-based high-gloss leather coating.
[0024] Put the above paint into a flow coater, raise the temperature to about 45°C, and then spray it on the surface of the artificial leather with a thickness of about 60 μm. Then, it is cured with an LED lamp with a wavelength of 365 nm at a curing speed of 10 m / min to obtain a cured film 1.
Embodiment 2
[0026] 30g waterborne epoxy acrylate (molecular weight: 15000), 40g waterborne polyester acrylate (molecular weight: 30000), 10g isobornyl acrylate, 10g trimethylolpropane triacrylate, 4.5g photoinitiator (by 1.5 g BASF TPO and 3g Ciba 1173) were mixed, heated to 60°C, and stirred evenly. Next, add 5g matting powder, 0.2g leveling agent (BYK333), 0.2g defoamer (BYK018) and 0.1g wetting and dispersing agent (BYK163), stir well, disperse at high speed, grind until the fineness is less than 20μm, filter , to obtain LED cured water-based matte leather paint.
[0027] Put the above paint into a roller coater, roll coat it on the leather surface, control the thickness to about 35 μm, and then use an LED lamp with a wavelength of 385 nm to cure at a curing speed of 30 m / min to obtain a cured film 2.
Embodiment 3
[0029] Mix 10 g of waterborne acrylate copolymer (molecular weight 50,000), 10 g of waterborne urethane acrylate (molecular weight of 10,000), 20 g of butyl acrylate, 20 g of isocecyl acrylate, 10 g of photoinitiator (consisting of 7 g of BASF TPO and 3 g of Ciba ITX ) to mix, heat up to 50°C, and stir evenly. Next, add 20g titanium dioxide, 7g matting powder, 1g leveling agent (BYK387), 1g defoamer (BYK1610) and 1g wetting and dispersing agent (BYK163), stir well, disperse at high speed, grind until the fineness is less than 20μm, Filter to obtain LED curing water-based white leather paint.
[0030] The above coating was put into a roller coater, and rolled onto the surface of synthetic leather with a thickness of about 25 μm, and then cured with an LED lamp with a wavelength of 395 nm at a curing speed of 15 m / min to obtain a cured film 3.
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