UPR Collection Paint (I) Pure Powder (3)

China Paint Online News: Unsaturated Polyester Resin - Chinese Name: Unsaturated Polyester Resin; Definition: Wire polyester resin with carbon double bond in the main chain. It can be composed of unsaturated binary carpentry (or acidic acid), saturated binary pythonic acid (or acidic acid) and binary alcohol (generally saturated binary alcohol), and ethylene monomer can form a mesh structure of the material. Applied disciplines: material science and technology (first-level discipline), polymer materials (second-level discipline), plastic (third-level discipline) above the content by the National Science and Technology Noun Review Committee for the review and publication. Unsaturated polyester resin unsaturated polyester resin, generally composed of unsaturated binary acid binary alcohols or saturated binary acid unsaturated binary alcohols, with ester bonds and unsaturated double bonds of line polymer compounds. Typically, polyester shrink reactions are performed at 190 to 220 degrees C until the desired acid value (or viscosity) is reached, and after the polyester shrink reaction is over, a certain amount of vinyl monomer is added to the heat and added to the viscous liquid, which is called unsaturated polyester resin. Unsaturated polyester resin is the most commonly used in thermostered resin, it is a line-shaped polymer composed of saturated binary acid, unsaturated binary acid and binary alcohol, diluted by cross-linked monomer or active solvent formed with a certain viscosity resin solution;
, the impact resistance of the model is better than the counter-punch situation. As can be seen from Table 2, polyester is the same, with a good sample impact strength using active CaCO 3 and the worst model impact strength using lightweight CaCO 3. A comparison of 6700, 6600, and CC450 polyester resins shows that the impact strength of the CC450 is better than that of 6700 and 6600, while the anti-UV test data show that the three are close in terms of weather resistance (impact strength).
4.1.3, gloss test results analysis
the type and dosing of fillers on the coating film gloss has a great impact. The filler is dispersed to the coating surface, which destroys the continuity of the substation resin and forms a layer of film that produces diffuse reflection, thus having a de-lighting effect. As can be learned from Table 3 below, the order in which different fillers affect coating gloss is: BaSO 4 < 90 s CaCO 3 < Active CaCO 3 < Lightweight CaCO 3. After UV lamp 24h irradiation, the three resins reflect good weather resistance, anti-UV test gloss drop is not obvious.
4.2, the effect of the change of titanium dioxide type on the coating film
In addition to providing color, i.e. decorative effect, titanium dioxide for powder coatings can also absorb ultraviolet light, improve the weather resistance of the coating. The results of the 5MPa impact strength test show that the effect of the change in the dosing of CR-828 on the impact strength is not obvious, and the impact strength of the three titanium dioxide powders is followed by: CR-828 > Sunscreen-resistant > ZA-100, i.e. the CR-828 system has the best impact resistance.
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