3results about How to "Low gloss" patented technology

The invention discloses a polyester resin composition for a powder coating, a matte powder coating and application thereof, the polyester resin composition for the powder coating comprises a high-acid-value resin A and a low-acid-value resin B, and the low-acid-value resin B is prepared from the following raw materials: polyol, an organosilicon intermediate, polyacid, an acidolysis agent and a catalyst. The super-weather-resistant high-acid-value resin A and the super-weather-resistant low-acid-value resin B have appropriate difference in performance indexes such as acid value and viscosity, and meanwhile, an organic silicon intermediate is only introduced into the super-weather-resistant low-acid-value resin B, so that a relatively large structural composition and reaction activity difference is generated between the super-weather-resistant high-acid-value resin A and the super-weather-resistant low-acid-value resin B; the prepared super-weather-resistant matte powder coating is outstanding in matting performance, has relatively low matting gloss without adding a matting agent, and also has a comfortable and soft surface appearance.

The application discloses a kind of deep matting outdoor polyester resin powder coating and preparation method thereof, it is related to powder coating technical field.The coating includes the following weight parts components: saturated end carboxyl polyester resin 50-70 parts, polyhedral oligomeric silsesquioxane hollow mesoporous silica hybrid matting agent 2-8 parts, polysiloxane 0.5-3 parts, curing agent 3-8 parts, filler 10-30 parts, leveling agent 1-5 parts, degassing agent 0.5-3 parts, pigment 5-15 parts, auxiliary agent 0.5-3 parts;The hybrid matting agent is grafted amino cage silsesquioxane and is hollow mesoporous silica by titanium ester lipophilic end-capped.The coating can effectively inhibit matting agent high-temperature agglomeration and pore hygroscopicity by the synergistic effect of three-dimensional hybrid skeleton steric hindrance, mesoporous channel multiple scattering and shell end-capped micro-isolation, so that product has extremely low gloss, smooth and delicate leveling appearance, high mechanical strength and excellent outdoor long-acting weather resistance.

The invention belongs to the technical field of coatings, and particularly relates to a low-temperature extinction transparent polyester resin composition as well as a preparation method and application thereof. The polyester resin composition comprises carboxyl-terminated polyester resin with a high acid value and carboxyl-terminated polyester resin with a low acid value, the high-acid-value carboxyl-terminated polyester resin is prepared from the following raw material components: dihydric alcohol A, polyhydric alcohol, nitrogen-containing dihydric alcohol, polyatomic acid A, an acidolysis agent A and an esterification catalyst, the low-acid-value carboxyl-terminated polyester resin is prepared from the following raw material components: dihydric alcohol B, nitrogen-containing dihydric alcohol, polyacid B, an acidolysis agent B and an esterification catalyst, the polyol does not include a diol. After the carboxyl-terminated polyester resin with the high acid value and the low acid value is applied to a powder coating, the powder coating can have extinction and low-temperature curing (140-160 DEG C curing) performance at the same time and has good spraying powdering rate, and an obtained coating is low in gloss (lower than 40 GU), high in transparency and excellent in impact resistance.