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Journal Articles Journal of The Adhesion Society of Japan Year : 2015

Eco-friendly Optical Adhesives Based onVegetable Oil Thermosets

Seiko Mitachi
  • Function : Author
Arisa Hagiwara
  • Function : Author
Norio Murata
  • Function : Author
Daiki Kojima
  • Function : Author
Guillaume Falco
  • Function : Author
Alice Mija


Highly moisture-​resistant optical adhesives need to be developed for optical devices to ensure that they can be used reliably in optical devices for outside environment use. Further, a principal aim is that these adhesives have less toxicity impact on the environment and also on humans, so they need to be eco-​friendly. A Vegetable Oil Based Epoxidized Thermoset (VOBET) derived from linseed, was tested as an optical adhesive after being cured with different hardeners. A conventional optical adhesive, the petroleum-​based, Epotek 353ND was used as a ref. material. With increasing humidity the ref. material's shear strength decreased significantly and interface peeling was obsd. for all samples, while VOBET samples maintained a certain level of strength. One particular VOBET formulation showed exceptional reliability. A comparison of shear strength before and after a pressure cooker test of thermally cured VOBET samples and Epotek 353ND samples showed that the strength of the latter decreased significantly while the former maintained a certain ratio of the initial strength. Furthermore, one particular VOBET formulation that was successfully cured at room temp. showed ∼7.2 MPa shear strength, which is comparable to that of Epotek 353ND.

Dates and versions

hal-03280202 , version 1 (07-07-2021)



Seiko Mitachi, Arisa Hagiwara, Norio Murata, Daiki Kojima, Guillaume Falco, et al.. Eco-friendly Optical Adhesives Based onVegetable Oil Thermosets. Journal of The Adhesion Society of Japan, 2015, 51 (s1), pp.279-285. ⟨10.11618/adhesion.51.279⟩. ⟨hal-03280202⟩
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