Hydroxyalkylamide curing agent composition for powder coating materials, and preparation method thereof
A hydroxyalkylamide and powder coating technology, applied in the field of hydroxyalkylamide curing agent composition and preparation thereof, can solve the problems of easy powder falling off, serious pinholes in coating film, easy moisture absorption of powder coatings and the like
Inactive Publication Date: 2015-08-05
六安捷通达新材料有限公司
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Problems solved by technology
However, due to the hydrophilic group in the hydroxyalkylamide structure, the powder coating prepared with it is easy to absorb moisture, which on the one hand causes the coating powder to easily agglomerate during storage, and the fluidity of the dry powder deteriorates; on the other hand, it also causes the powder The adsorption of particles to the substrate is reduced, which makes the powder easy to fall off before baking; it also makes the pinholes in the coating film more serious after baking
Method used
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Embodiment
[0017] The batching used in the embodiment is as follows:
[0018] Hydroxyalkylamide: SA3120 produced by Lu'an Jietongda Chemical Co., Ltd., Primid XL552 produced by EMS Chimie;
[0019] Hydrophobic additive: synthetic polyethylene wax (CERALENE 691 from EUROCERAS);
[0020] Synthetic polyacrylic acid wax (Licocene PP 6102 of Clariant company);
[0021] Waxy fatty acid amides (Licowax C from Clariant);
[0022] Hydrogenated castor oil (Crayvallac PC);
[0023] Montan wax (Licowax E from Clariant);
[0024] All the hydroxyalkylamide type curing agent compositions obtained in Table 1 were uniformly dry-mixed, and at the corresponding temperature, the screw speed was kept at 4000rpm, and after melting and kneading, extruded into tablets to obtain examples 1-7 of the present invention. Hydroxyalkylamide type curing agent composition. It should be noted that Example 8 is a hydroxyalkylamide curing agent composition prepared by a dry mixing method.
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The invention relates to a hydroxyalkylamide curing agent composition for powder coating materials, and a preparation method thereof. The curing agent composition comprises, by weight, 85-95% of a component A and 5-15% of a component B, wherein the component A is hydroxyalkylamide, and the component B is a hydrophobic auxiliary agent. According to the present invention, the hydroxyalkylamide curing agent composition is the sheet-like, and contains hydrophobic auxiliary agent so as to achieve the moisture absorption prevention purpose, wherein the moisture absorption prevention principle of the hydrophobic auxiliary agent is that the hydrophobic auxiliary agent and water are immiscible and the water molecules do not easily stay on the surface, such that the contact of the water molecules in the air and the hydroxyalkylamide curing agent can be prevented when the hydrophobic auxiliary agent acts on the surface of the hydroxyalkylamide curing agent so as to solve the moisture absorption problem of the hydrophilic group.
Description
technical field [0001] The invention relates to the field of powder coatings, in particular to a hydroxyalkylamide curing agent composition for powder coatings and a preparation method thereof. Background technique [0002] As a curing agent for outdoor powder coatings, β-hydroxyalkylamide has the characteristics of non-toxic and environmentally friendly, strong reactivity, low curing temperature, good storage stability, and no volatile matter. It is gradually replacing triglycidyl isocyanurate It has become the most important curing agent for outdoor powder coatings and is widely used in the powder coating industry. Among them, European countries have banned the use of TGIC in powder coatings. However, due to the hydrophilic group in the hydroxyalkylamide structure, the powder coating prepared with it is easy to absorb moisture, which on the one hand causes the coating powder to easily agglomerate during storage, and the fluidity of the dry powder deteriorates; on the othe...
Claims
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Inventor 鲍远志翁世兵
Owner 六安捷通达新材料有限公司