Ultraviolet-curable cathode electrophoresis coating composition
A cathodic electrophoretic paint and composition technology, applied in electrophoretic paints, coatings and other directions, can solve the problems of failing to meet practical application requirements, poor paint film leveling effect, slow curing speed, etc., and achieve good storage stability and curing speed. Fast, high crosslinking density effect
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Embodiment 1
[0015] Example 1 Preparation of UV-curable cathodic electrophoretic coating composition
[0016] Concrete preparation steps are as follows:
[0017] ① Preparation of dimethylaminoethyl methacrylate modified acrylic resin
[0018] In a four-necked flask equipped with a stirrer, a reflux condenser, and a thermometer, add 60 g of propylene glycol methyl ether acetate, and at 100° C., dropwise add 15 g (accounting for 14w%) dimethylaminoethyl methacrylate, 18 g ( Accounting for 17w%) hydroxyl-containing (meth)acrylate monomer ((meth)acrylic acid-2-hydroxypropyl ester), other acrylate monomer 74g (accounting for 69w%, including 24g methyl methacrylate, 30g isobornyl methacrylate, 20g butyl methacrylate) and the mixture of azobisisobutyrocyanide (3.21g) of monomer total amount 3wt% are formed dropwise in 3 hours, and the insulation reaction is 3 hours to make the single The volume conversion rate reaches more than 98%, and the dimethylaminoethyl methacrylate modified acrylic resin...
Embodiment 2
[0025] Example 2 Preparation of UV-curable cathodic electrophoretic coating composition
[0026] With photoinitiator α-dimethoxy-α-phenylacetophenone 1.5g and diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide 1.5g, replace embodiment 1 step 4. 0.6 g of photoinitiators 1-hydroxycyclohexanebenzophenone and 2.4 g of 2-hydroxy-2-methyl-1-phenylacetone were used, and the remaining dosage and specific preparation steps were the same as in Example 1.
Embodiment 3
[0027] Example 3 Preparation of UV-curable cathodic electrophoretic coating composition
[0028] With optically active compound pentaerythritol tetraacrylate 3g and optically active oligomer epoxy acrylate (ETERNAL6215) 12g, replace the optically active compound difunctional acrylate (1,6 - hexanediol diacrylate) 5g and optically active oligomer aliphatic urethane acrylate (EBECRYL8602) 10g, the remaining dosage and specific preparation steps are the same as in Example 1.
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