How to choose a transparent matting powder coating formulation?

Abstract
the market at this stage through two-part production of transparent anti-light powder. Subject to polyester reaction speed and leveling performance, the current transparent anti-light powder gloss is high, the surface is not delicate enough, the choice of raw materials is strong, the need for auxiliary additives.
On this basis, a transparent light-clearing powder will be developed, which will improve the fineness of the coating surface, the lowest gloss up to 40%, improve the application performance of the powder outdoors, and apply testing to the single-component transparent glazing to simplify the production process of transparent light-absorbing powder
the transparent anti-light effect in different systems using different types of anti-light agents

results are as follows:
experiments show that: ordinary physicochemical anti-light agent in epoxy and polyester tolerance is poor, resulting in transparent powder whitening, poor transparency, some anti-light agents due to the containing of catalytic, curing and other additives, easy to lead to film yellowing affect transparency. Ordinary two-part transparent ophthalmum powder is subject to the reaction speed of polyester, so try to synthesize acrylic resin with different reaction activity.
two-component transparent anti-light test using different reaction-active acrylic resins
experimental principles
GMA acrylic resins with high decorative, excellent weather resistance, corrosion resistance, good reaction activity, through Synthesis of different equivalents, different ratios of GMA resin, adjust the gluing time of GMA resin, choose the appropriate resin as a two-part transparent anti-light powder AB composition, relying on the difference in AB composition gel time to achieve the effect of coating transparent de-lighting. At the same time through different synthetic ratio and process to adjust the application performance of the coating film.
two-part transparent anti-light sample test
by adjusting the GMA resin equivalent, can significantly open the reaction gel time difference. The effect of coating film de-lighting is achieved by the difference of AB part reaction time.
test (extrusive temperature: 95 degrees C-105 degrees C, curing conditions: 160 degrees C x 25min)
two-part mixed sample spray plate:
results and analysis
experiments show that: GMA acrylic resin The greater the equivalent, the longer the gel time, the shorter the fast component gel time will lead to low gloss of the model, rough surface similar to chavin effect, poor mechanical performance, appropriate extension of the rapid component can achieve the purpose of de-lighting and equilibrium leveling, mechanical performance, fast component and slow component reaction speed difference is significant. GMA double-component transparent anti-light powder, although it solves the problem of high gloss and poor surface effect of traditional transparent anti-light powder, but the production process is numerous, it is necessary to try a single-component transparent de-lighting application.
Experimental production of single-part transparent anti-light powder
experimental principle
in a single-part powder coating formula to add two or more different reaction systems, different reaction speed of film raw materials, after the common extrusion dispersion, crushing, screening, spraying, baking. To ensure compatible at the same time by adjusting the different dispersion properties of the resin, to achieve the coating film microscopic different reaction speed difference, so as to achieve the effect of de-lighting.
acrylic
seeded transparent anti-light powder coating formulation data
concluded that by adjusting the dispersion effect of different parts of resin in the formulation can achieve the goal of single-group de-lighting. The production process is simplified, but mechanical properties also need to be optimized for resin reaction activity and attachment properties. It can be adjusted by adjusting the amount of monosome, the selection of monosome types and the introduction of auxiliary function groups.
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