Road Marking Paint and Machine Manufacturer
+86-15668659958
The core idea is to dynamically adjust the melt viscosity and calcium powder gradation of Fischer Tropsch wax to control the settling rate, while minimizing costs while ensuring basic performance. 1、 Basic formula composition (calculated per ton of coating) Raw material addition amount (kg) Functional cost ratio Petroleum resin 80-85 Adhesive skeleton, providing adhesion 35-38% Fischer Tropsch wax Winter/Spring/Autumn: 35, Summer: 25 Viscosity reduction, leveling, anti settling 12-15% Mineral white oil 8-10 Plasticized anti cracking, improving low-temperature toughness 4-5% Composite calcium powder 850-880 Filling skeleton, reducing cost 40-42% Titanium dioxide/Lide powder 5-8 (Titanium dioxide 1%+Lide powder 7%) Covering coloring 3-4% Auxiliary agents 2-3 (Antioxidants+leveling agents) Anti aging, defoaming 1%
Note: Seasonal adjustment of Fischer Tropsch wax: low demand for viscosity reduction due to high temperatures in summer, reducing quantity to prevent flow; Plasticize and prevent brittle cracking in winter and spring. Strictly control the amount of petroleum resin: when it exceeds 85kg, the cost increases sharply, and when it is less than 80kg, the adhesion is insufficient (grid method>level 2).
2、 The core function and selection of Fischer Tropsch wax 1 Functional implementation mechanism, performance requirements, quantification effect of Fischer Tropsch wax, viscosity reduction, small molecule alkane infiltration into resin chains, reduction of intermolecular forces, melt viscosity from 3500 to 1200 mPa · s (140 ℃), promotion of leveling, improvement of melt flowability, reduction of scraping stripe leveling time from 15s to 8s (160 ℃), prevention of settling and spatial hindrance of calcium powder formation, slowing down the settling rate of fillers for 24 hours ≤ 0.5% 2 Suggested model for selecting Fischer Tropsch wax: melting point 70~105 ℃, avoid high temperature volatilization (summer) or low temperature crystallization (winter); Add logic:
3、 Design of Calcium Powder Grading Scheme 1 Grading target high filling amount (85%+): reduce costs, but balance settlement and strength; Settlement rate ≤ 0.5% (standing for 24 hours); Scraping flowability: Ensure that the outflow time at 160 ℃ is ≤ 30s (coating -4 cups). 2. Third grade calcium powder compounding scheme. Calcium powder type proportion. Functional supplier refers to 40% of coarse particles to form a skeleton, reduce shrinkage stress. 35% of particles in Hezhou heavy calcium in Guangxi fill gaps, improve compactness. 25% of fine particles from Guangyuan Chemical in Jiangxi encapsulate resin, and improve leveling. Henan Xintai Calcium Industry. 3 Grading verification data level formula settlement rate (24h), scraping leveling and wear resistance (mg), coarse 50%+fine 50%, 1.2% with obvious stripes 85, coarse 40%+medium 35%+fine 25%, 0.4% surface smoothness 75, coarse 30%+medium 30%+fine 40%, 0.3% slight sagging 70. Conclusion: The optimal grading is coarse 40%+medium 35%+fine 25%, which balances anti settlement and construction performance.
4、 Temperature control of key control points in production process: melt mixing: 160-170 ℃ (to avoid white oil volatilization caused by>180 ℃ (depending on the white oil model)); Insulation time: ≤ 30 minutes (to prevent resin thermal aging). Sedimentation prevention: Fill immediately after mixing, and stir to prevent sedimentation when the material temperature is above 140 ℃; Install a low-speed mixer (≤ 30 rpm) on the storage tank. 5、 Performance and Economic Comparison Indicators: This formula has a melt viscosity of 1200 mPa · s (140 ℃), wear resistance of 75 mg (CS-17 wheel), low temperature crack resistance of -10 ℃, and no cracks. Application Scenarios: Suitable for Temporary Markings on Low Traffic Roads
Low cost maintenance
Summary: Through seasonal regulation of Fischer Tropsch wax and optimization of calcium powder gradation, this formula meets the needs of low-end marking, with the core advantage of balancing leveling and anti settling, and is suitable for budget sensitive projects.
Our company is a professional manufacturer of road hot-melt coatings and road glass beads. If you are interested, please feel free to contact me via email at any time export@toproadtraffic.com
