1. Concept: Solvent-based thermoplastic acrylic resin, also known as one-component self-drying acrylic resin, does not undergo cross-linking reaction and depends on solvent volatilization to dry film; the film-forming material becomes plastic at elevated heating temperature. The (softened), therefore, we call it thermoplastic acrylic.

2. Application: Thermoplastic acrylic resin relies on solvent volatilization to form a film, does not require high-temperature grilling, so it is generally used in large-scale engineering facilities or plastic parts that are not suitable for baking.

3. Selection: Thermoplastic acrylic resin will not undergo further crosslinking due to film formation, and the main properties of the film forming product are determined by the molecular weight of the resin itself and the TG (glass transition temperature). Therefore, the molecular weight and TG become the main parameters for our choice of thermoplastic acrylic acid. The molecular weight and the level of TG determine the hardness and dryness of the resin itself. The physical properties and chemical properties of the resin with a high molecular weight are relatively better, but considering the workability and the application of solids, the molecular weight of the thermoplastic acrylic resin is generally controlled at 50,000. Between 10,000 and 100,000 (Some have lower molecular weight for better construction and fullness). In general, high TG resin hardness and gloss are high, but brittleness also increases; chemical resistance such as ethanol resistance is also With the increase of TG, it increases, but in order to consider the overall performance, different TGs of different heights will be designed for different materials in formula design.

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Molecular weight concept: molecular weight is the molar mass. The molecular weight of our polymer is often expressed as the average molecular weight, while the most representative is the number average molecular weight and weight average molecular weight . (The sum of the product of the number of molecules in the resin and its molecular weight divided by the number of molecules The average molecular weight of the sum); (multiply each molecular weight in the resin Addition of the corresponding weight fraction). The size of the value represents the molecular weight distribution of the resin, which is theoretically smaller The narrower the distribution, the better the resin's performance.

Glass Conversion Temperature (TG): TG is the temperature at which the polymer's thermal expansion coefficient increases, ie, the lowest temperature at which the polymer chain moves energy conserved relative to its neighboring chains (increased CTE is the result of greater freedom of the molecular chain links). Because this phenomenon is the first observation of this phenomenon in glass research, it is named after the glass transition temperature. The TG can be defined on the shaped material as below this temperature, the polymer is brittle and above the temperature it is soft (except for amorphous materials such as water).