Azo polymerization initiators

V-601

CAS : 2589-57-3

non-nitrile oil soluble

Plastics manufacturing

Photocurable

V-601 is a nitrile-free oil-soluble azo polymerization initiator which has similar level of polymerization activity as AIBN. A safer developed as alternative to AIBN, V-601 decomposition results in much less toxic byproducts. As a nitrile-free azo initiator, V-601 displays excellent solubility characteristics in organic solvents. Since the volatility of the decomposition product is higher than that of others, such a product can be removed in the process of polymer manufacturing. Being of non-nitrile type, the polymerized polymers are highly transparent, therefore, semiconductors and LCDs applications are expected.

  • Non-nitrile azo initiator as an alternative to AIBN
  • Freely soluble in various organic solvents, available for high solid coating.
  • With equivalent polymerization activity of AIBN. Efficiency of polymerization rises in alcohol solvents
  • 10 Hour half-life decomposition temperature: 66℃
Structural formula of Dimethyl 2,2'-azobis(2-methylpropionate)
Chemical name Dimethyl 2,2'-azobis(2-methylpropionate)
CAS RN® 2589-57-3
Molecular weight 230.26
Molecular formula C10H18N2O4
Synonyms Dimethyl 2,2'-azobisisobutyrate; MAIB
2,2'-Azobis(isobutyric acid methyl); AIBME

Physical characteristics

Color
Appearance
slightly yellow or light yellow
crystals or oily liquid
Melting point/freezing point 22-28℃
10hour half-life decomposition temperature 66℃(in toluene)
Activation energy 131.2 kJ/mol
Frequency factor (ln A) 35.67
Solubilities

water : insoluble.
benzene, ethanol, N,N-dimethylformamide, dioxane, DMSO : freely soluble.
methanol, toluene, chloroform, hexane : soluble
acid:soluble

SADT 35℃

*SADT: Self-accelerating decomposition temperature

Packaging & Storage conditions

Packaging 10kg / 500g
Storage conditions keep under 10℃

Related laws and regulations

TSCA Listed under 5e Consent Order
EINECS Listed
REACH 01-2120807902-57-0000

Comparison of V-601 and AIBN

V-601 is a nitrile-free oil-soluble azo polymerization initiator which has similar level of polymerization activity as AIBN. A safer developed as alternative to AIBN, V-601 decomposition results in much less toxic byproducts. Being of non-nitrile type, the polymerized polymers are highly transparent.

Chemical structure

V-601 is a nitrile-free oil-soluble azo polymerization initiator which has similar 10-hour half-life temperature of polymerization activity as AIBN.

  AIBN V-601
Structural formula C8H12N4

Contain Nitrile group

C10H18N2O4

No Nitrile group

10-hour half-life temperature
(Toluene)
65℃ 66℃

Transparency

The polymerized polymers from V-601 are highly transparent than from AIBN.

Transparency comparison between V-601 and AIBN

Appearance of AIBN and V-601 solutions.

Graph showing higher transmittance of V-601 than AIBN

Comparison of transparency (%) of AIBN and V-601 solutions.

Toxicity

Toxicity of decomposition products from V-601 are lower than from AIBN.

  AIBN V-601
Acute oral toxicity
LD50(mg/kg)
Product 100(Rat) >527(Rat)
Decomposition Product 25(Rat) 2369(Rat)

Volatility of Decomposition Products

The decomposition product of V-601 is characterized by a higher volatility than that of AIBN. Also, the decomposition product of V-601 is azeotropic with water, therefore, thus can be easily removed from the post-reaction system.

  • Boiling point of decomposition product of V-601: 85-90 ℃ (5 mmHg)
  • Azeotropic point of decomposition product of V-601 with water: 90 ℃
Evaporation Rate of Decomposition Products

Solubility

Comparison of solubility between V-601 and AIBM.

  AIBN V-601
Solubility
(wt%, r.t.)
Toluene 7.0 >50
Methanol 7.5 >50
Ethyl acetate 14.0 >50
n-Hexane n.a. >50
Ethanol 2.7 >50
DMF 20.5 >50
DMSO 6.5 >50
Water 0.1 0.3
Acetone 29 >50
Chloroform 25 >50

Metal-content-control-grade

Metal-content-controlled V-601 is also available for manufacturing metal-content-control-polymer.

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