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Product Info

Photoacid Generator
(Photo-Cationic Polymerization Initiator)

Sulfonium Series

CPI®-100 / 200series UV
UV light / i-line
CPI®-300series
i-line
VC-1 VC-2 Series (development product)
i-line
  • VC-1FG(powder)

  • cation
    (light-absorbing site)

    cation(light-absorbing site)
CPI®-400series
g-line / h-line/ i-line
ES-1 (development product)
ES-2 (development product)
g-line / h-line/ i-line
  • ES-1B(powder)
  • ES-2B(powder)

  • cation
    (light-absorbing site)

    cation(light-absorbing site)

Photoacid Generator(Iodonium)
IK Series

  • IK-1(powder)
  • IK-1FG(powder)

  • cation
    (light-absorbing site)

    cation(light-absorbing site)
  • IK-20B(powder)

  • cation
    (light-absorbing site)

    cation(light-absorbing site)

Nonionic Photoacid Generator

NAseries
(development product)
i-line compatible
  • NA-CS1(powder)

  • Aryl amide skeleton with
    a light-absorbing moiety

    Aryl amide skeleton with a light-absorbing moiety

Thermal acid generator

TA Series(Sulfonium Salt Type)

IKseries(Iodonium Salt Type)

AAseries(Ammonium Salt-Type)

 

Super Strong Base

Thermal Base Generators

DBU Salt Thermal Base Generators

DBU Salt

DBU Salt

DBU derivative Salt

DBU Salt

Phenylphosphine Derivative Salt

Ureas

Amines

Ammonium Salts

Company info

ES-1B Ionic Photoacid Generator, Photo-Cationic Polymerization Initiator (Sulfonium)

Characteristics and Applications

ES-1B is a sulfonium salt type photoacid generator with high sensitivity to i- and h-rays, a special grade available only from our company, and has a higher photolysis rate (acid generation efficiency) and solubility in various solvents and monomers than CPI-410B.
The anionic structure is borate, and it shows high cationic polymerization. It also has excellent low outgassing during polymerization and low metal corrosion of the cured material.
ES-1B is a non-solvent type powder product.

ES-1B Structure
  • Regarding absorbed wavelengths
    It has the same absorption spectrum as the CPI-400 series, with an i-line (365 nm) of about 9600 [M-1 cm-1] in molar extinction coefficient and an h-line (405 nm) of 1380 [M-1 cm-1]. There is some absorption.
    There is almost no absorption in the g-line (436 nm).
  • Differences from the CPI-400 series
    By controlling the substituent of the cationic skeleton, it has better solubility in organic solvents than the CPI-400 series.Furthermore, it has excellent photosensitivity and shows higher acid generation efficiency than the CPI-400 series.
  • Characteristics of the generated acid [HB(C6F5)4]
    It has high acid strength and reactivity equivalent to HSbF6. In addition, since it is resistant to hydrolysis and does not contain hydrofluoric acid, it is possible to prevent corrosion of surrounding metal parts.
  • Regarding different types of acids generated
    We have experience in the development of (1) trifluoromethanesulfonate, (2) PF3(C2F5)3 salt, and (3) FG (special anion) salt. If you are interested in any other anions, please feel free to contact us.
  • Recommended amount of additive
    Add about 0.5 to 2 wt% to the resin, depending on the application and film thickness.
  • Recommended film thickness
    Although it depends on the application and the amount of addition, a thin film of 10 μm or less, which is less affected by the transmittance, is suitable.
    In the case of a thick film of 100 μm or more, the type with a small molar extinction coefficient (CPI-100, 200 series, etc.) has high light transmittance in the depth direction and can generate acid to the deep part. The CPI-300 series is suitable for medium film thicknesses of about 50 μm.

Product

ES-1B

Appearance

粉体

Powder

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Anion CAS RN® M.W. Appearance color High sensivity for i-line Low coloration gh ray high sensitivity High solubility High Activity（Strong acid） Solution product non-PFAS Low corrosiveness Packing Stage

B(C6F5)4

 Yes (not disclosed) Approx. 1500 Powder Light yellow ～ Yellowish brown ✔ ✔ ✔ ✔ ✔ 0.5kgBottle Pilot

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PFAS FREE

In recent years, there has been a worldwide tightening of regulations on per- and polyfluoroalkyl substances (PFAS), and we are focusing on the development of PFAS-free products to ensure that our customers can use them with peace of mind. Please also make use of our existing lineup of PFAS-free products.

*PFAS: OECD definition published in2021

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