Anti-sinking PU extra-clear primer and preparation method thereof
An anti-sag and clear primer technology, which is applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of general sanding, general adhesion, and poor anti-sag, and achieve good adhesion, good fullness, and anti-sag. good sinking effect
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Embodiment 1
[0047] An anti-sag PU special clear primer is prepared by mixing an anti-sag PU polyurethane primer, a PU anti-sag curing agent, and a PU anti-sag thinner at a weight ratio of 0.9:0.5:0.5.
[0048] Described anti-sag PU polyurethane primer is made up of following components:
[0049] A1: soybean oil alkyd resin 67%; A2: dispersant 0.1%; A3: defoamer 0.1%; A4: anti-settling slurry 8%; A5: n-butyl acetate 1%;
[0050] B1: zinc stearate 2%; B2: 800 mesh talc powder 6%; B3: 1250 mesh talc powder 8%;
[0051] C1: n-butyl acetate 1%;
[0052] D1: 6% nitrocellulose solution; D2: 0.1% leveling agent; D3: 0.1% drier; D4: 0.6% n-butyl acetate.
[0053] The PU anti-sag curing agent is composed of the following components: E1: 55% of n-butyl acetate; E2: 5% of isocyanate trimer; E3: 40% of isocyanate isopolymer.
[0054] The PU anti-sag thinner consists of the following components: F1: 35% n-butyl acetate; F2: 50% propylene glycol methyl ether acetate; F3: 15% dimethyl carbonate.
[005...
Embodiment 2
[0058] An anti-sag PU special clear primer is prepared by mixing an anti-sag PU polyurethane primer, a PU anti-sag curing agent, and a PU anti-sag thinner at a weight ratio of 1:0.4:0.6.
[0059] Described anti-sag PU polyurethane primer is made up of following components:
[0060] A1: soybean oil alkyd resin 63%; A2: dispersant 0.2%; A3: defoamer 0.2%; A4: anti-settling slurry 10%; A5: n-butyl acetate 1.5%;
[0061] B1: zinc stearate 4%; B2: 800 mesh talc powder 4.4%; B3: 1250 mesh talc powder 10%;
[0062] C1: n-butyl acetate 1.5%;
[0063] D1: 4.2% nitrocellulose solution; D2: 0.2% leveling agent; D3: 0.2% drier; D4: 0.6% n-butyl acetate.
[0064] The PU anti-sag curing agent is composed of the following components: E1: 35% of n-butyl acetate; E2: 15% of isocyanate trimer; E3: 50% of isocyanate isopolymer.
[0065] The PU anti-sag thinner consists of the following components: F1: 55% n-butyl acetate; F2: 40% propylene glycol methyl ether acetate; F3: 5% dimethyl carbonat...
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