New development of polyurethane dispersion derived from blocked aromatic diisocyanate

S. Subramani, Young Jun Park, Young Soo Lee, Jung Hyun Kim

Research output: Contribution to journalArticlepeer-review

90 Citations (Scopus)

Abstract

Making water dispersible/reducible blocked-isocyanates facilitates incorporation of blocked-isocyanates into an aqueous dispersion of co-reactant. Anionically modified methyl ethyl ketoxime (MEKO), ε-caprolactam (CL) and 3,5-dimethylpyrazole (DMP) blocked aromatic diisocyanates (toluene 2,4-diisocyanate, TDI and 4,4′-diphenylmethane diisocyanate, MDI) dispersible isocyanate adducts were prepared by introducing ionic pendant groups and characterized by FT-IR, gel permeation chromatography (GPC), differential scanning calorimeter (DSC) and thermo-gravimetric analyses (TGA) techniques. It was found that molecular weights of MDI-based polyisocyanates were higher. Thermal studies showed that the de-blocking temperature of the isocyanate adducts decreases in the order: ε-caprolactam > methyl ethyl ketoxime > DMP. Gelation test was conducted by using the isocyanate adducts with hydroxyl functional aqueous polyurethane dispersion. It was also found that the dispersions of blocked adducts are stable and compatible with polyurethane (polyether and polyester based) and acrylic dispersions.

Original languageEnglish
Pages (from-to)71-79
Number of pages9
JournalProgress in Organic Coatings
Volume48
Issue number1
DOIs
Publication statusPublished - 2003 Nov

Bibliographical note

Funding Information:
• Recruitment period: 2009 to 2009 • No. of centres involved: not reported • Unit of randomisation: individuals • No. randomised: 6742 • Number of arms considered in this review: 3 • Maximum trial duration: 6 months • Funding by non-profit organisation: This research was funded by Alzheimer’s Society UK and Medical Research Council • Funding by commercial organisation: none reported • Publication status: full text report

Funding Information:
• National Institute for Health Research (NIHR), UK. This protocol was supported by the (NIHR), via a Cochrane Programme Grant to the Cochrane Dementia and Cognitive Improvement Group. The views and opinions expressed herein are those of the authors and do not necessarily reflect those of the Systematic Reviews Programme, NIHR, National Health Service (NHS), or the Department of Health. • SERI and Horizon 2020, Other. The authors AR and MdN are partially funded by a grant for the project ‘OPERAM: OPtimising therapy to prevent Avoidable hospital admissions in the Multi-morbid elderly’ supported by the European Union’s Horizon 2020 research and innovation programme under the grant agreement No 6342388, and by the Swiss State Secretariat for Education, Research and Innovation (SERI) under contract number 15.0137. The opinions expressed and arguments employed herein are those of the authors and do not necessarily reflect the official views of the EC and the Swiss government.

Funding Information:
The review authors would like to thank the group's Information Specialist, Anna Noel-Storr, for designing and running the electronic searches, and for co-ordinating the crowd-sourcing component of the review. This review is part of a program grant in which 11 other reviews were produced using a protocol template (Abraham 2015; Al-Assaf 2015; Denton 2015; Forbes 2015; Forbes 2015a; Forbes 2015b; Gates 2019a; Gates 2019b; Harrison 2015; Siervo 2015; Tang 2015). All authors participating in this review also acted as authors in several other reviews. As a consequence, wording chosen in the methods section may be identical across reviews, and concepts discussed and content of reviews may be similar.

Funding Information:
Anne WS Rutjes - Dr. Rutjes declares partial funding by a grant for the project ’OPERAM: OPtimising therapy to prevent Avoidable hospital admissions in the Multi-morbid elderly’ supported by the European Union’s Horizon 2020 research and innovation programme under the grant agreement No 6342388, and by the Swiss State Secretariat for Education, Research and Innovation (SERI) under contract number 15.0137.

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Surfaces, Coatings and Films
  • Organic Chemistry
  • Materials Chemistry

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