Synthesis of isophorone diisocyanate (IPDI) based waterborne polyurethanes: Comparison between zirconium and tin catalysts in the polymerization process

Sardón, Haritz; Irusta, L.; Fernández‐Berridi, M. J.

doi:10.1016/j.porgcoat.2009.08.005

Cited by 99 publications

(91 citation statements)

References 14 publications

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“…The negative value of x SO indicates that the oxygen strongly prefers to be solvated by water. We further implemented a small repulsion between C and R, which is not uncommon as, e.g., CH 3 and CH 2 also appear to repel each other. [28,29] Further, there is a significant repulsion between O units and apolar units:…”

Section: Modeling Parametersmentioning

confidence: 99%

“…WPUs are synthesized via the pre-polymer mixing process (a step growth polymerization process), and PU pre-polymers were synthesized from isophorone diisocyanate (IPDI), linear hydroxyl functional polyether (polyol), and dimethylol propionoic acid (DMPA) before being dispersed into water. [3][4][5][6] In a pre-polymer mixing process, a low molar mass pre-polymer, composed of IPDI, a low molar mass polyol block and DMPA groups, is synthesized without addition of solvent. In general, the pre-polymers are random co-oligomers in which the ratio of the relative amounts of IPDI, polyol, and DMPA can be varied.…”

Section: Introductionmentioning

confidence: 99%

“…A typical pre-polymers mixture consists of several components, some of which are amphiphilic. [3] The majority of the acid groups on the pre-polymers are deprotonated by raising the pH above 7 and are subsequently dispersed in water. The (short chain) polyurethanes in these particles are subsequently chain-extended to high molar mass polyurethanes.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Self-Organization of Polyurethane Pre-Polymers as Studied by Self-Consistent Field Theory

Tuinier

Casteren

et al. 2015

Macromol. Theory Simul.

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Using self‐consistent field (SCF) theory, we studied the self‐assembly characteristics of polyurethane pre‐polymer dispersions in aqueous solutions. With a molecularly detailed model implementing the Scheutjens–Fleer discretization scheme, it is shown how the stability, equilibrium size, and internal structure of the (swollen) micelles in polyurethane (PU) dispersions depend on the chemical structure and the molecular composition of the charged pre‐polymer mixtures. The stability region of these micelles is found to increase when acid groups become deprotonated and when the ionic strength is lowered. Insight into the physical–chemical behavior of PU pre‐polymer dispersions is important for the subsequent process of film formation from the PU dispersions for the final coating properties.

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Section: Modeling Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Self-Organization of Polyurethane Pre-Polymers as Studied by Self-Consistent Field Theory

Tuinier

Casteren

et al. 2015

Macromol. Theory Simul.

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“…Using an acetone process, the PUDs for adhesives are synthesized. [8][9][10][11] The prepolymer process can be subdivided. Firstly, a polymerization of diols and diisocyanates is performed in an organic solvent.…”

Section: 2mentioning

confidence: 99%

“…Therefore, those data were obtained by means of FT-IR spectroscopy, which represents a powerful tool to monitor NCO groups in an aqueous environment. 4,5,9,10,20 A conversion of the NCO groups was obtained through integrated absorbance-peak areas: [21][22][23][24] A v dv bc a v dv bcA…”

Section: 2mentioning

confidence: 99%

Monitoring of polyurethane dispersions after the synthesis

Ocepek¹,

Zabret²,

Kecelj³

2015

Mater. Tehnol.

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Chemical and physical parameters of the aqueous polyurethane dispersion (PUD) were studied after the synthesis. A prepolymer mixing process with a limited-chain extension step was used in order to examine the polymer and dispersion behavior with respect to the ageing time. Measurements of free isocyanate groups were performed with the aid of Fourier transform infrared spectroscopy (FT-IR). The pseudo-first-order kinetics of NCO disappearance was proposed and the value of the corresponding constant was determined. Additionally, particle size, particle size distribution, pH, conductivity and molecular mass were monitored and compared. Keywords: polyurethane dispersion, colloid, FT-IR V raziskavi smo preu~evali spreminjanje kemijskih in fizikalnih parametrov vodne poliuretanske disperzije (PUD) po sintezi. Disperzijo smo sintetizirali po postopku vme{avanja prepolimera z omejenim podalj{evanjem verig za preu~evanje polimerne disperzije z ozirom na~as po sintezi. Merjenje prostih izocianatnih skupin smo izvedli z metodo Fourierjeve transformacijske infrarde~e spektroskopije (FT-IR). Predpostavili smo kineti~ni model psevdoprvega reda z ozirom na reakcije izocianatnih skupin ter dolo~ili vrednost kineti~ne konstante. Dodatno smo spremljali in primerjali povpre~ne velikosti delcev, porazdelitev velikosti delcev, pH, prevodnost in molekulsko maso.

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Preparation and characterization of waterborne polyurethane based on diphenylmethane diisocyanate‐50

Xiao

Zhao

et al. 2016

Adv Polym Technol

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A new waterborne polyurethane was prepared using diphenylmethane diisocyanate-50. Properties of this waterborne polyurethane and the conventional isophorone diisocyanante-based waterborne polyurethane were tested. It was found that diphenylmethane diisocyanate-50-based waterborne polyurethane showed better properties compared to isophorone diisocyanantebased waterborne polyurethane. The films of diphenylmethane diisocyanate-50-based waterborne polyurethane had higher tensile strength than of isophorone diisocyanante-based waterborne polyurethane; their water resistance and thermal stability were also improved. And they have higher surface hydrophobicity compared with those of isophorone diisocyanante-based waterborne polyurethane. It's believed that diphenylmethane diisocyanate-50-based waterborne polyurethane has excellent application performance in many industrial fields.

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Synthesis of isophorone diisocyanate (IPDI) based waterborne polyurethanes: Comparison between zirconium and tin catalysts in the polymerization process

Cited by 99 publications

References 14 publications

Self-Organization of Polyurethane Pre-Polymers as Studied by Self-Consistent Field Theory

Self-Organization of Polyurethane Pre-Polymers as Studied by Self-Consistent Field Theory

Monitoring of polyurethane dispersions after the synthesis

Preparation and characterization of waterborne polyurethane based on diphenylmethane diisocyanate‐50

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