AO-168, also called Dilauryl Thiodipropionate (DLTP), is a sulfur-based auxiliary antioxidant. It works as a co-stabilizer with phenolic or phosphite antioxidants, helping protect polymers from long-term thermal degradation.
It is especially useful in applications where heat aging resistance is critical, such as cables, automotive parts, and foam products.
| Property | Typical Value |
|---|---|
| Chemical Name | Dilauryl 3,3′-Thiodipropionate |
| Appearance | White powder or flakes |
| Molecular Weight | ~ 638 |
| Melting Point | 39 – 41 °C |
| Sulfur Content | ~ 5.0% |
| Volatility (at 150 °C) | < 0.2% |
| Recommended Dosage | 0.1 – 0.3 phr |
| With AO-1010 | Slows down oxidation chain reaction |
|---|---|
| With AO-1076 | Extends melt processing stability |
| As co-stabilizer | Prevents polymer breakdown under heat |
Note: AO-168 is not effective alone — it must be used in combination with a primary antioxidant.
Q1: Can AO-168 be used alone?
No. It is a secondary antioxidant and must be used with a primary type like AO-1010.
Q2: Is it safe for food packaging?
Please confirm with us. Food contact grade must be specified during order.
Q3: What is the shelf life?
At least 2 years when stored in a cool, dry place in unopened bags.
Q4: Will it affect product color?
No. It is colorless and non-staining in typical use levels.
Q5: Does AO-168 help in outdoor weathering?
It improves heat aging, but for UV protection, a light stabilizer is recommended.
