Method for preparing scratch-resistance alkyd resin used for PU furniture paint
A kind of alkyd resin and preparation technology, applied in the direction of coating, polyester coating, etc., can solve the problems of poor scratch resistance, poor fullness of paint film, poor transparency, etc., and achieve extremely high transparency for recoating Good, good scratch resistance, good fullness effect
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[0020] The present invention will be further described in detail below with reference to the examples, but the embodiments of the present invention are not limited thereto.
[0021] The preparation process of anti-scratch alkyd resin for PU furniture paint is generally produced by one-step feeding solvent method. The solvent method has a reflux device and has less material loss. The relative molecular mass distribution is uniform to ensure product quality, which specifically includes the following steps:
[0022] S1, put the raw material into the reaction kettle, pass N 2 Raise the temperature until there is reflux and stop passing N 2 , the types of raw materials and their mass percentages are: 19-21% oleic acid, 20-24% phthalic anhydride, 0.5-0.7% maleic anhydride, 2-4% trimethylolpropane, 9-11% pentaerythritol, ethylene glycol 5-7%, adipic acid 3-4%, reflux xylene 2%, xylene or butyl acetate 33-37%;
[0023] S2. Heat up to 185°C and keep warm for 1 hour. In actual applic...
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