The Preparation of Waterborne Sodium Bisulfite - Blocked Polyurethane Curing Agent

Chao Gao Zhang; Xing Qiu; Yi Hu; Jin Ling Chen; Sheng Peng Wang; Jin Qiang Liu

doi:10.4028/www.scientific.net/AMR.557-559.1505

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The Preparation of Waterborne Sodium Bisulfite - Blocked Polyurethane Curing Agent

Abstract:

waterborne sodium bisulfite－blocked polyurethane was using polyether diols(N210), isophorone diisocyanate (IPDI) as the main material, sodium bisulfite as blocking agent, ethanol as the cosolvent. The effect of temperature and time of blocking reaction, alcohol than water were carefully studied. The best process parameter of blocking reaction: the temperature was 20°C; the reaction time was 45min; n(NaHSO3):n(NCO)=1.1; alcohol than water=1.85; the deblocking temperature determined by DSC was about 76～130°C

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Periodical:

Advanced Materials Research (Volumes 557-559)

Pages:

1505-1508

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.557-559.1505

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Online since:

July 2012

Authors:

Chao Gao Zhang, Xing Qiu, Yi Hu, Jin Ling Chen, Sheng Peng Wang, Jin Qiang Liu

Keywords:

Blocking, Sodium Bisulfite, Waterborne Polyurethane

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References

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