[1] Qi Zhengjian, Luo Zhenyang, Li Xiangxin, Sun Yueming Feng Weidong, et al. Study on ternary polymerization of toluene diisocyanate [J]. Journal of Southeast University (English Edition), 2006, 22 (2): 265-269. [doi:10.3969/j.issn.1003-7985.2006.02.025]

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Study on ternary polymerization of toluene diisocyanate()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

22

Issue:

2006 2

Page:

265-269

Research Field:

Chemistry and Chemical Engineering

Publishing date:

2006-06-30

Info

Title:

Study on ternary polymerization of toluene diisocyanate

Author(s):

Qi Zhengjian¹;  Luo Zhenyang²;  Li Xiangxin³;  Sun Yueming¹ Feng Weidong¹;  Wang Hualin¹;  Yan Dazhi¹

¹Department of Chemistry and Chemical Engineering, Southeast University, Nanjing 210096, China
² College of Information Science and Technology, Nanjing Forestry University, Nanjing 210037, China
³Shandong Light Industry Engineering School, Qingdao 266112, China

Keywords:

2;  4-diisocyanate toluene;  terpolymer;  gel permeation chromatography;  curing agent;  storage stability

PACS:

O63;TQ43;TQ31

DOI:

10.3969/j.issn.1003-7985.2006.02.025

Abstract:

For the production of reactive polyurethane cross-linkinger and curing agents, 2, 4-diisocyanate toluene(TDI)terpolymer, which possesses the rigid structures of hexatomic ring and three reactive functional groups, was synthesized and characterized by the Fourier transform infrared(FTIR), the gel permeation chromatography(GPC)and the chemical analysis methods.The reaction conditions were studied and optimized.A tracking research on the polymerization process of TDI was taken by using the GPC.The formation processes of the terpolymer, oligomers and higher-polymers were also dealt with.Results show that the TDI terpolymer can be prepared in the presence of Cat-3 catalyst and at the reaction temperature of(60±2)℃.The reaction time is short, its outcomes have narrow molecular weights distribution, namely molecular weights from 530 to 550, M_w/M_n=1.10, and the mass fraction of NCO is(25.0±0.5)%.With the reaction time prolonging, however, TDI can be further higher-polymerized to form higher-polymers.Benzoyl chloride(0.4%, mass fraction), as the stabilizing agent, can effectively inhibit the occurrence of higher-polymerization.The obtained TDI terpolymer can be stable for more than half a year.

References:

[1] Bock M, Pedain J, Uerdingen W.Process for the preparation of polyisocyanates containing isocyanurate groups and the use thereof [P].USA Patent, 4324879.1982.
[2] Ewald M, Windmueller M, Poersch W, et al.Catalysts for preparing polyisocyanates containing isocyanurate groups and their use[P].USA Patent, 6875243.2005.
[3] Slack W E, Kemp H T.Freeze-stable allophanate modified toluene diisocyanate terpolymers [P].USA Patent, 6028158.2000.
[4] Pavlova M, Draganova M.Heterocyclic oligomers based on toluene diisocyanate[J].Polymer Communications, 1991, 32(14):446-448.
[5] Li Haihong.Terpolymerization of 2, 4-tolylene diisocyanate[J].China Synthetic Resin and Plastics, 2004, 21(3):26-28.(in Chinese)
[6] Yu Weimin.Polyurethane elastomer notebook [M].Beijing:Chemical Industry Press, 2001.(in Chinese)
[7] Fu Mingyuan, Sun Chunjing.Application of polyurethane elastomer.2nd ed[M].Beijing:Chemical Industry Press, 1999. 307.(in Chinese)

Memo

Memo:

Biographies: Qi Zhengjian(1964—), female, associate professor, qizhengjian@sohu.com;Sun Yueming(1965—), male, doctor, professor, sun@seu.edu.cn.

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