Dilauryl Peroxide (LPO) 105-74-8

Dilauroyl Peroxide
Trade Name: Initiator LPO
English Name: Dilauroyl peroxide
Chemical Name: Dilauroyl peroxide
Chemical Structure:
Molecular Formula: C24H46O4
Molecular Weight: 398.6
Theoretical Active Oxygen Content: 4.01%
CAS: 105-74-8
EINECS: 203-326-3
Major Decomposition Products: CO₂, lauric acid esters
Safety Data:
Half-life (measured in chlorobenzene solution):
0.1 hour: 99°C
1 hour: 79°C
10 hours: 61°C
Thermal Stability Data:
Self-Accelerating Decomposition Temperature (SADT): 50°C
Critical Temperature (Tem): 45°C
Control Temperature (Tc): --
Storage Temperature (Tsmax): --/30°C
Technical Specifications:
Appearance: White powdery or flake-like solid
Purity: ≥99.0%
Applications: This product serves as a polymerization initiator for ethylene, styrene, vinyl chloride, vinylidene chloride, acrylic esters, and methacrylic esters.
Packaging:
The standard packaging for LPO is a cardboard drum with a net weight of 25 kg, or a corrugated cardboard box containing four 5-kg plastic bags, with a net weight of 20 kg. Packaging can also be customized according to customer specifications.
LPO is a Class D solid organic peroxide. Goods classification: 5.2; UN Number: 3106; Class 2 dangerous goods packaging.
Safety Precautions:
(1) Keep away from sources of ignition, open flames, and heat sources.
(2) Avoid contact with reducing agents (such as amines), acids, bases, and heavy metal compounds (such as accelerators, metal soaps, etc.).
(3) Please refer to the Material Safety Data Sheet (MSDS) for this product.
Applications:
1. Polymerization of vinyl chloride:
LPO is widely used in aqueous suspension polymerization and bulk polymerization reactions. The polymerization temperature range is 60–75°C. In many cases, LPO is blended with other highly active peroxides to
, such as peroxydicarbonates (bis(4-tert-butylcyclohexyl) peroxydicarbonate) or peroxy esters (1,1,3,3-tetramethylbutyl neodecanoate peroxide), to enhance its
reactivity.
2. Polymerization of Ethylene:
LPO is used to initiate the polymerization of high-pressure polyethylene. Due to its poor solubility, it is often replaced by iso-nonanoyl peroxide; however, the greatest advantage of LPO is that it can be stored at room temperature
.
3. Polymerization of Acrylates and Methacrylates:
LPO can also be used in the polymerization of acrylates. The polymerization temperature ranges from 60 to 90°C, and it is often used as a substitute for more toxic initiators such as azodibutyronitrile.
4. Initiator for ABS Resin Polymerization:
LPO is also an important initiator for ABS polymerization. When used in combination with 1,1-di-tert-butyl peroxy-3,3,5-trimethylcyclohexane (CH335), it exhibits excellent
initiation performance.
Note: LPO can also be formulated into a 40% aqueous suspension (LPO-40W) and a 25% aqueous suspension (LPO-25W). These formulations are primarily used in water-phase reactions such as vinyl chloride polymerization
and offer the advantages of convenient and safe operation.