Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Synthesis and Properties of Photocurable Aliphatic Epoxy Modified Urethane Acrylate

광경화형 지방족 에폭시 변성 우레탄 아크릴레이트의 합성과 물성

Lim, Jin-Kyu;Kim, Dong-Kook;Kim, Woo-Geun
임진규;김동국;김우근

  • Published : 20040500
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Abstract

A photocurable aliphatic epoxy modified by urethane acrylate was prepared from BDGEDA, NPGEDA and the diisocyanate in order to improve the properties of an aliphatic epoxy acrylate. After mixing a photoiniatiator, the curing properties of the photocurable aliphatic epoxy modified by urethane acrylate were investigated. The viscosities of NUA were higher than BUA. The glass transition temperatures of NUA were higher than those of BUA, and NUA was thermally more stable than BUA. The hardness and abrasion of NUA were higher than those of BUA. The yellow index of both NUA and BUA showed a similar result but that of BUA was a little higher. NUA had higher tensile strength of UV cured-film than BUA, but BUA had a higher elongation than NUA.

지방족 에폭시 아크릴레이트의 개질을 위하여 BDGEDA(1,4-butanediol diglycidyl ether diacrylate)와 NPGEDA(neopentylglycol diglycidyl ether diacrylate)에 디이소시아네이트를 도입하여 우레탄 아크릴레이트의 특성을 가지는 광경화형 지방족 에폭시 변성 우레탄 아크릴레이트를 합성하였다. 광개시제를 혼합하여 지방족 에폭시 변성 우레탄 아크릴레이트의 경화특성을 조사하였다. 점도는 NUA가 BUA보다 더 높았다. 유리전이온도는 NUA가 더 높았으며 열안정성도 더 우수하였다. 경도와 내마모성은 NUA(NPGEDA modified urethane acrylate)가 BUA(1,4-BDGEDA modified urethane acrylate)보다 높았으며 Yellow index는 2가지 모두 거의 유사하였으나 BUA가 약간 더 우수하였다. 경화필름의 인장강도는 NUA가 BUA보다 높은 값을 보였으며 신장율은 BUA가 NUA보다 더 높음을 알 수 있었다.

Keywords

References

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