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Study on thermal-storage stability of polyurethane dispersions prepared via Prepolymer method.

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Title: Study on thermal-storage stability of polyurethane dispersions prepared via Prepolymer method.
Authors: Jiang, Hongmei1 (AUTHOR), Sun, Lijuan1 (AUTHOR) sun.lijuan@huafeng.com
Source: Journal of Polymer Research. Aug2025, Vol. 32 Issue 8, p1-11. 11p.
Subjects: Polyurethanes, Prepolymers, Fabrication (Manufacturing), Heat storage, Viscosity
Abstract: In order to explore the thermal-storage stability of waterborne polyurethane (WPU) fabricated by prepolymer method, a series of WPUs were prepared with polyether polyol (PPG), aliphatic isocyanate (IPDI), dimethylol propionic acid (DMPA), 1, 4-butanediol (BDO), triethyl amine (TEA) and hydrazine hydrate (HyHy). Effects of -NCO content of prepolymer, ratio of [NCO] to [H] after post-extension, HyHy dilution ratio and adding time, and solid content of WPU, were detailedly investigated. The viscosity and appearance of WPUs were used to characterize the stability during the thermal-storage process. Decreasing the -NCO content of prepolymer, ratio of [NCO] to [H] after post-extension and solid content (SC) of WPUs, viscosity rise for WPUs in thermal-storage process decreased significantly; increasing the dilution ratio of H2O to HyHy and prolonging the addition time of HyHy aqueous solution in the post-extension process, WPUs with stable viscosity under thermal-storage environment could be obtained. The mechanism for thermal-storage stability affected with "cage effect" was proved. The systematic study on the influencing factors and mechanism of thermal-storage stability in this study is of great significance to the understanding of prepolymer method and to promote the industrialization of WPUs via prepolymer method. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Polymer Research is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 187673304
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  Label: Title
  Group: Ti
  Data: Study on thermal-storage stability of polyurethane dispersions prepared via Prepolymer method.
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  Data: <searchLink fieldCode="AR" term="%22Jiang%2C+Hongmei%22">Jiang, Hongmei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sun%2C+Lijuan%22">Sun, Lijuan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> sun.lijuan@huafeng.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Polymer+Research%22">Journal of Polymer Research</searchLink>. Aug2025, Vol. 32 Issue 8, p1-11. 11p.
– Name: Subject
  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Polyurethanes%22">Polyurethanes</searchLink><br /><searchLink fieldCode="DE" term="%22Prepolymers%22">Prepolymers</searchLink><br /><searchLink fieldCode="DE" term="%22Fabrication+%28Manufacturing%29%22">Fabrication (Manufacturing)</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+storage%22">Heat storage</searchLink><br /><searchLink fieldCode="DE" term="%22Viscosity%22">Viscosity</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In order to explore the thermal-storage stability of waterborne polyurethane (WPU) fabricated by prepolymer method, a series of WPUs were prepared with polyether polyol (PPG), aliphatic isocyanate (IPDI), dimethylol propionic acid (DMPA), 1, 4-butanediol (BDO), triethyl amine (TEA) and hydrazine hydrate (HyHy). Effects of -NCO content of prepolymer, ratio of [NCO] to [H] after post-extension, HyHy dilution ratio and adding time, and solid content of WPU, were detailedly investigated. The viscosity and appearance of WPUs were used to characterize the stability during the thermal-storage process. Decreasing the -NCO content of prepolymer, ratio of [NCO] to [H] after post-extension and solid content (SC) of WPUs, viscosity rise for WPUs in thermal-storage process decreased significantly; increasing the dilution ratio of H2O to HyHy and prolonging the addition time of HyHy aqueous solution in the post-extension process, WPUs with stable viscosity under thermal-storage environment could be obtained. The mechanism for thermal-storage stability affected with "cage effect" was proved. The systematic study on the influencing factors and mechanism of thermal-storage stability in this study is of great significance to the understanding of prepolymer method and to promote the industrialization of WPUs via prepolymer method. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Polymer Research is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1007/s10965-025-04477-y
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 11
        StartPage: 1
    Subjects:
      – SubjectFull: Polyurethanes
        Type: general
      – SubjectFull: Prepolymers
        Type: general
      – SubjectFull: Fabrication (Manufacturing)
        Type: general
      – SubjectFull: Heat storage
        Type: general
      – SubjectFull: Viscosity
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      – TitleFull: Study on thermal-storage stability of polyurethane dispersions prepared via Prepolymer method.
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            NameFull: Jiang, Hongmei
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            NameFull: Sun, Lijuan
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            – D: 01
              M: 08
              Text: Aug2025
              Type: published
              Y: 2025
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              Value: 32
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              Value: 8
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