The Great Stabilizer Showdown: Calcium-Zinc vs. Organotin

For decades, PVC stabilizer additives fell into three main categories, each with distinct pros and cons:

1. -Based Stabilizers (Phasing Out)

Cost: Historically the option (20–30% lower than alternatives).

Toxicity: High environmental and health risks; banned in the EU/US for applications.

Performance: Excellent long-term heat stability; still used in some power cables in developing markets.

2. Calcium-Zinc Stabilizers (Rising Star)

Cost: 15–20% more expensive than , but prices are dropping with scaled production.

Toxicity: Non-toxic, compliant with EU RoHS/REACH, ideal for food packaging and toys.

Limitations: Slightly inferior thermal stability vs. ; requires lubricant co-additives.

3. Organotin Stabilizers (Niche Premium Choice)

Cost: 2–3× higher than calcium-zinc, used where clarity/extreme heat resistance is critical.

Toxicity: Some methyltin types face restrictions, but octyltin is accepted in medical PVC.

Applications: Transparent PVC bottles, medical tubing, and automotive interiors.

Industry Insight: "The move to calcium-zinc PVC stabilizer additives is irreversible in Europe, but in Asia, the transition remains uneven," notes Dr. Lisa Müller, a polymer chemist at Tecnon OrbiChem.

Earth Stabilizers: China’s Homegrown Solution

As Western markets pushed for -free alternatives, China leveraged its abundant earth resources to develop PVC stabilizer additives based on lanthanum and cerium compounds. These stabilizers now dominate segments like

PVC pipes and fittings: Offering heat stability comparable to at competitive costs.

Wire and cable jacketing: earth systems provide electrical insulation.

Product Advantages:

1. Excellent product appearance and fineness.

2. No precipitation, with good moisture resistance.

3. Excellent thermal stability and high retention rate of aging residues.

Application Parameter:

Customer Examples of Formula Use：

https://www.zjhongtian.com/product/pvc-calciumzinc-stabilizer/