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AZO Series

Azo type Initiators

Technology in fabrics, resins, paints and adhesives is supported by catalyst chemistry in polymer chemistry. Otsuka Chemical contributes polymer industries by introducing variety of AZO type initiators in order to meet request from polymer industry with our technology.

AIBN2,2'-Azobis-isobutyronitrile

AIBN2,2'-Azobis-isobutyronitrile

AMBN2,2'-Azobis-2-methylbutyronitrile

AMBN2,2'-Azobis-2-methylbutyronitrile

ADVN2,2'-Azobis-2,4-dimethylvaleronitrile

ADVN2,2'-Azobis-2,4-dimethylvaleronitrile

ACVA4,4'-Azobis-4-cyanovaleric acid

ACVA4,4'-Azobis-4-cyanovaleric acid

Applications

  AIBN AMBN ADVN MAIB ACVA
Methyl methacrylate ○ ○ ○ ○ ○
Vinyl chloride ○ ○ ○ ○
Vinyl acetate ○ ○ ○ ○ ○
ABS ○ ○ ○ ○
Styrene ○ ○ ○ ○ ○
Acrylic acid ester ○ ○ ○ ○ ○
Acrylonitrile ○ ○ ○ ○
SBR ○ ○ ○ ○
Acrylamide ○
Polyol ○ ○ ○ ○
Butadiene ○ ○ ○   ○
Methacrylic acid ○ ○ ○   ○

The classification according to the polymerization temperature of azo polymerization initiator

  • Low-temperature polymerization application …… ADVN
  • Medium temperature polymerization application …… AIBN, AMBN
  • Water-soluble type …… ACVA

The property of the Azo polymerization initiator

 
AIBN
AMBN
ADVN
ACVA
Molecular weight
164.2 192.3 248.4 280.3
Melting point (°C)
100~103 48~52 45~70 110~120
Decomposition point (°C)
100~103 105~107 97~99 110~120
10hours. half-life (°C)
65 67 52 68
Activation energy (kcal/mol)
31.3 29.4 29.0 34.0
CAS No.
78-67-1 13472-08-7 4419-11-8 2638-94-0
Fire Service Act No.
5-II 5-II 5-II Nonhazardous material
Purity (%)
>98 >98 >98 >98 (after drying)
Volatile matter (%)
<0.1 <2 <1 <20 (water)

Data of the solubility

 
AIBN
AMBN
ADVN
ACVA
Water
<0.1 <0.1 <0.1 <0.1
Methanol
6.1 113 63 8.5
Acetone
28 263 213 1.5
Benzene
10 187 176 <0.1
Toluene
4.6 153 129 <0.1
Xylene
2.1 103 91.1 <0.1
n-Hexane
0.1 2.4 10 <0.1
DMSO
7.2 87.3 35 48.2
DMF
19.8 192 121 84.5
Styrene
5.7 146 118 <0.1
MMA
7.3 137 104 <0.1

at 20°C(g/100g solvent)