Product Science | Nano Calcium Carbonate: A Robust Shield in Automotive Primer Applications

During the daily driving process of a car, the chassis is subjected to multiple tests such as stone impact, mud erosion, and complex road conditions for a long time. As a key line of defense for protecting the chassis, the performance of the automotive primer directly affects the service life and driving safety of the vehicle. Among the many materials that improve the performance of automotive coatings, nano calcium carbonate stands out with its unique advantages and has become the focus of industry attention. In this issue, we will introduce the application and key role of nano calcium carbonate in the field of automotive bottom coating in the product science popularization series.

Application of Nano Calcium Carbonate in Automotive Bottom Coating

At present, the application of nano calcium carbonate in various market sectors and industries results in relatively high prices for automotive primer products. This is because automotive coatings mainly undertake important functions such as corrosion prevention, noise reduction, and durability, and have strict requirements for material performance. Taking PVC quick sol for automotive bottom coating as an example, it is composed of PVC resin, plasticizer, tackifier, thixotropic agent (nano calcium carbonate), stabilizer, filler and other components. The typical formula includes 100 parts of PVC, 120 parts of DOP, an appropriate amount of solvent, and 100 parts of nano calcium carbonate. Among them, nano calcium carbonate serves as both a thixotropic agent and a reinforcing agent in PVC rapid sol. It is worth noting that nano calcium carbonate used for automotive coatings can be divided into two types based on its thixotropy: positive thixotropy and negative thixotropy. European and American car models prefer to use positive thixotropy nano calcium carbonate, while Japanese cars tend to use negative thixotropy products. According to data, the usage of nano calcium carbonate for automotive bottom coating in the sedan industry reached about 80000 tons in 2021, but there are relatively few domestic manufacturers that can provide stable supply. In this context, Guoding Huaming has brought new solutions to the automotive primer market with advanced technology and product advantages. Next, we will delve into the specific role of nano calcium carbonate in the field of automotive coatings.

The Excellent Protective Performance of Nano Calcium Carbonate for Automotive Coatings

1. Enhance the ability to resist stone strikes

Nano calcium carbonate has a special microstructure and nanoscale particle size, which can effectively enhance the toughness and impact resistance of coatings when filled in automotive primer coatings. During vehicle operation, when hard objects such as stones collide with the chassis, nano calcium carbonate particles can disperse the impact energy, prevent the generation and propagation of cracks, just like putting a strong armor on the car chassis, greatly reducing the risk of damage to the chassis due to stone impact. Research has shown that the addition of an appropriate amount of nano calcium carbonate to automotive bottom coatings has improved their stone impact resistance by more than 30% compared to when not added, which can better protect the chassis metal from damage.

2. Improve corrosion resistance

The car chassis is highly susceptible to corrosion when exposed to damp and muddy environments for a long time. The addition of nano calcium carbonate can improve the density of coatings, reduce pores and defects in coatings, thereby reducing the penetration of moisture, oxygen, and corrosive media, and effectively delaying the corrosion process of chassis metals. At the same time, the synergistic effect of nano calcium carbonate and other components in the coating enhances the adhesion between the coating and the metal surface of the chassis, further improving the corrosion resistance and providing more durable protection for the automotive chassis.

3. Optimize the elasticity of the coating

During the driving process, the chassis of a car may deform due to road bumps. A primer coating with good elasticity can adapt to this deformation without problems such as cracking or peeling. Nano calcium carbonate can regulate the rheological properties of coatings, giving them suitable elasticity after curing. When the chassis undergoes slight deformation due to external forces, the coating containing nano calcium carbonate can expand and contract accordingly, maintaining a tight coverage of the chassis and maintaining the protective effect.

Reasonable Usage to Achieve a Balance Between Performance and Cost

In automotive coatings, the amount of nano calcium carbonate used is not necessarily better, but needs to be precisely controlled according to the specific coating formula and performance requirements. Generally speaking, the amount of nano calcium carbonate added in common anti stone vehicle bottom coatings such as PVC series, polyester series, acrylic series, etc. is usually between 10% and 20%. For example, in some PVC anti stone impact vehicle bottom coating formulas, when the content of nano calcium carbonate is 20% -25%, it can significantly improve the thixotropy and construction performance of the coating, and effectively reduce production costs while ensuring anti stone impact, corrosion resistance and other properties. If the dosage of nano calcium carbonate is too low, its improvement effect on coating performance is not significant; If the dosage is too high, it may lead to an increase in the viscosity of the coating, affecting the construction coating, and even reducing the overall performance of the coating due to particle aggregation. Hubei Guoding Huaming, with advanced production technology and rich application experience, can provide professional nano calcium carbonate application solutions for automotive primer coating production enterprises, assist in determining the optimal dosage ratio, and achieve a perfect balance between product performance and cost.

Unique Advantages of Shandong Useen Nano Calcium Carbonate

1. Advanced production technology ensures product quality

SHANDON USEEN CALCIUM CO., LTD. adopts advanced production technology to precisely control the particle size, crystal structure, and surface properties of nano calcium carbonate. During the production process, a strict quality inspection system is implemented to ensure that each batch of nano calcium carbonate products has characteristics such as uniform particle size, high purity, and good dispersibility. This high-quality nano calcium carbonate product can fully leverage its performance advantages in automotive primer applications, providing stable and reliable quality assurance for automotive primer coatings.

2. Customized services to meet diverse needs

Useen is well aware that there are differences in the needs of different automotive primer coating manufacturers, and therefore provides customized nano calcium carbonate products and services. According to customers' special requirements for coating performance, such as higher stone impact resistance, super strong corrosion resistance, or specific construction process requirements, the company can perform surface modification treatment on nano calcium carbonate, adjust product performance parameters to meet customers' personalized needs, and help customers create more competitive products in the automotive primer market.

Looking ahead to the Future

Nano calcium carbonate is becoming an important material for improving the protection level of automotive chassis in the field of automotive coatings due to its excellent performance. SHANDON USEEN CALCIUM CO., LTD.'s nano calcium carbonate products, with their excellent quality and customized services, provide high-quality choices for automotive primer coating production enterprises, promote the continuous development and progress of automotive primer technology, and safeguard the driving safety of car owners.