Industrial-grade 1,2-Propanediol (PG), as a fundamental chemical raw material, is primarily used in the fields of material synthesis, industrial additives, and functional fluids. Specific applications are as follows:

I. Core Raw Material for Polymer Synthesis

1. Resin Manufacturing

   • Unsaturated Polyester Resin (accounting for 27% of industrial-grade propylene glycol consumption): Used in fiberglass, automotive parts, and construction composites;
   • Epoxy Resin Modification: Serves as a cross-linking agent to enhance coating adhesion and wear resistance;
   • Polyurethane Resin Synthesis: Used in the production of sealants, elastomers, and artificial leather.

2. Plasticizers and Surfactants

   • Replaces phthalate plasticizers for softening PVC and rubber products;
   • Prepares industrial emulsifiers and demulsifiers for oilfield extraction and wastewater treatment.

II. Industrial Additives and Solvents

1. Coatings and Inks

   • Antifreeze for water-based coatings: Lowers freezing point below 0°C, improving low-temperature stability;
   • Paint thinner and printing ink solvent, enhancing leveling and drying speed.

2. Textile Printing and Dyeing

   • Dyeing penetrant: Improves dye uniformity and fiber coloring intensity;
   • Fabric antistatic agent and softener.

3. Metal Processing and Electronics

   • Brightening additive for electroplating solutions, enhancing metal surface smoothness;
   • Circuit board solder cleaning agent and electronic component degreasing solvent.

III. Functional Fluid Applications

1. Antifreeze and Heat Transfer Medium

   • Industrial equipment antifreeze (e.g., cooling towers, oilfield pipelines), with freezing points as low as -60°C;
   • High-temperature heat transfer fluid (e.g., chemical plant thermal conduction systems).

2. Lubrication and Corrosion Inhibition

   • Base fluid for mechanical lubricants, reducing metal friction loss;
   • Shock-absorbing fluid for hydraulic presses, preventing cavitation in hydraulic systems.