Introduction to cationic light curing of monomers

Introduction to cationic light-curing monomers

  1. Cationic photopolymerization mechanism

Cationic photopolymerization mechanism
Advantages:
  • Anaerobic polymerization resistance
  • Less human irritation from epoxy monomer
  • Less volume shrinkage

Better performance of polymerization product

Vinyl ether monomers

    • Classification of vinyl ether monomers

      Classification of vinyl ether monomers

    • Vinyl ether-based monomers in market

      Vinyl ether-based monomers in market
      Vinyl ether-based monomers in market
    • Characteristics and applications of vinyl ether monomers

Characteristics:

  •  Very low viscosity
  • High dilution capacity
  • Low toxicity
  • Very fast reaction time (comparable to acrylate monomer)
  • Single structure. The stability of the product formed with vinyl ether monomer curing agent alone is poor

Application: Used as a cationic light-curing reactive diluent, not used alone

Epoxy propane monomer

  •       Classification of Epoxy propane monomer

  • Classification of Epoxy propane monomer
    Classification of Epoxy propane monomer
  • Epoxy propane monomer in market

  • Epoxy propane monomer in market
    Epoxy propane monomer in market
  • 2-(3,4-Epoxycyclohexyl)ethyltriethoxysilane CAS 10217-34-2
    2-(3,4-Epoxycyclohexyl)ethyltriethoxysilane CAS 10217-34-2
  • 2-(3,4-Epoxycyclohexyl)ethyltriethoxysilane CAS 10217-34-2
  • Bis[2-(3,4-epoxycyclohexyl)ethyl]tetramethyldisiloxane CAS 18724-32-8
    Bis[2-(3,4-epoxycyclohexyl)ethyl]tetramethyldisiloxane CAS 18724-32-8
  • Bis[2-(3,4-epoxycyclohexyl)ethyl]tetramethyldisiloxane CAS 18724-32-8
  •  Characteristics and applications of epoxy propane monomer

Characteristics for Glycidyl ether epoxy monomer

  • Longer induction period for cationic light curing
  • Low cationic light-curing activity
  • Unsatisfactory performance of the product

Characteristics for Alicyclic epoxy monomers

  • Lower viscosity
  • Fast cationic light curing speed
  • Excellent performance of the product
  • Less variety of products, large differences in curing activity between products

Oxetane monomers

  • Classification of Oxetane monomers

  • Classification of Oxetane monomers
    Classification of Oxetane monomers
  •  Oxetane monomers supplied by our company

  •  3-Ethyl-3-(hydroxymethyl)oxetane CAS 3047-32-3
  • 3-Ethyl-3-(hydroxymethyl)oxetane CAS 3047-32-3
  •  3,3′-(oxydimethanediyl)bis(3-ethyloxetane) CAS 18934-00-4
  • 3,3'-(oxydimethanediyl)bis(3-ethyloxetane) CAS 18934-00-4
  • 3,3′-[(1-methylethylidene)bis(4,1-phenyleneoxymethyl)] CAS 105071-04-3
  • 3,3′-[(1-methylethylidene)bis(4,1-phenyleneoxymethyl)] CAS 105071-04-3
  •  3-Ethyl-3-(phenylmethoxymethyl)oxetane CAS 18933-99-8
  • 3-Ethyl-3-(phenylmethoxymethyl)oxetane CAS 18933-99-8
  •  3-Ethyl-3-(phenoxymethyl)oxetane CAS 3897-65-2
  • 3-Ethyl-3-(phenoxymethyl)oxetane CAS 3897-65-2
  • 1,4-Bis[(3-ethyl-3-oxetanylmethoxy)methyl]benzene CAS 142627-97-2
  • 1,4-Bis[(3-ethyl-3-oxetanylmethoxy)methyl]benzene CAS 142627-97-2
  • 4,4′-Hydroxymethylbiphenyl polymer oxetane CAS 358365-48-7
  • 4,4'-Hydroxymethylbiphenyl polymer oxetane CAS 358365-48-7
  •  3-Ethyl-3-methacryloxymethyloxetane CAS 37674-57-0
  • 3-Ethyl-3-methacryloxymethyloxetane CAS 37674-57-0
  •  (3-Ethyl-3-oxetanyl)methyl acrylate CAS 41988-14-1
  • (3-Ethyl-3-oxetanyl)methyl acrylate CAS 41988-14-1
  • 3-Ethyl-3-[[3-(triethoxysilyl)propoxy]methyl]oxetane CAS 220520-33-2
  • 3-Ethyl-3-[[3-(triethoxysilyl)propoxy]methyl]oxetane CAS 220520-33-2

Characteristics and applications of oxetane-based monomers

Characteristics:

  • Low curing volume shrinkage
  • Low viscosity
  • Low toxicity
  • Fast reaction speed
  • Ability to frontline polymerization and delayed curing
  • Good performance of polymerization products
  1. Influencing factors of cationic light curing

  • Nucleophilic/basic substances
  • The effect of temperature. During curing, the higher the temperature the faster the curing speed. (pre-baking, post-baking, self-produced heat)
  • Effect of water/moisture. A small amount of water speeds up the curing process, and as the water content and humidity increase, cationic curing is inhibited.
  • The effect of alcohol. Chain transfer agent that speeds up cationic light curing but reduces the molecular weight of the polymer.
  • The effect of viscosity. The higher the viscosity of the formulation, the slower the reaction rate.
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