• Title, Summary, Keyword: reactive silicone oligomer

Search Result 2, Processing Time 0.033 seconds

Preparation, Surface Characteristics and Physical Properties of Polyurethane-based Gel-coat Containing Reactive Silicone Oligomers

  • Jang, Su-Hee;Baek, Seung-Suk;Hwang, Seok-Ho
    • Elastomers and Composites
    • /
    • v.51 no.4
    • /
    • pp.269-274
    • /
    • 2016
  • Two different reactive silicone oligomers, hydroxylpropyl terminated PDMS (PDMS-L) and 1-(2,3-dihydroxy-propoxy)propyl terminated PDMS (PDMS-B), were synthesized through hydrosilylation reaction under Karstedt's catalyst. Using the reactive silicone oligomers, two different silicone-modified gel-coat series were prepared to investigate their thermal and mechanical properties as well as surface characteristics according to reactive silicone oligomer contents. In case of thermal stabilities and mechanical properties, the gel-coat series containing PDMS-B showed higher values than that of the gel-coat series containing the PDMS-L. The contact angle for the gel-coat containing both silicone oligomers/was increased with reactive silicone oligomer contents but there was similar surface tension between PDMS-L and PDMS-B.

Synthesis of UV-Curable PDMS-Modified Urethane Acrylate Oligomer and Physical Properties of the Cured Film (광경화형 PDMS 변성 우레탄 아크릴레이트 올리고머 합성과 경화필름 물성에 관한 연구)

  • Yeo, Jun-Seok;Hwang, Seok-Ho
    • Elastomers and Composites
    • /
    • v.48 no.4
    • /
    • pp.249-255
    • /
    • 2013
  • Hydroxypropyl terminated PDMS was synthesized by the hydrosilylation reaction with allyl alcohol in the presence of Karstedt's catalyst. And them, an one-pot reaction with HDI isocyanurate trimer and hydroxyethyl methacrylate was conducted to give a silicone-modified urethane acrylate oligomer (PUA oligomer) having 9000 g/mol, weight average molecular weight. The synthesized PUA oligomer was characterized by using FT-IR and GPC. The UV-curable coatings were prepared by PUA oligomer blending with a reactive monomer (phenylthioethyl acrylate) under the different mole ratios. It was found that the refractive index of cured film increased when the reactive monomer was added but there was no relationship between the refractive index and amount of reactive monomer. Also, their transmittance for cured films was not change as increasing the content of reactive monomer.