Study of anionic polyurethane ionomer dispersant

Huang, Yi‐Chin; Ding, Shangwu; Yang, Kai; Chwang, C. P.; Chao, D. Y.

doi:10.1007/bf02696245

Cited by 16 publications

(4 citation statements)

References 9 publications

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“…In the above flask a 0.1573 equivalent of toluene diisocyanate was subsequently added and reacted at 80–85°C for about 2 h to form a NCO‐terminated polyurethane (PU) prepolymer. A 0.034 equivalent of triethylamine was then reacted with this NCO‐terminated PU prepolymer in 80g acetone to form a quaternized NCO‐terminated PU prepolymer 2–8. This quaternized NCO‐terminated PU prepolymer further reacted with hydrolytes of dimethyldimethoxysilane (0.01 equivalent) or dimethyldiethoxysilane (0.01 equivalent), and 170 g water was then added to form the siloxane‐based PU ionomers with approximately 17.5% solids.…”

Section: Methodsmentioning

confidence: 99%

Study of oxygen-permeable polyurethane ionomer. II

Wang

Chao

2000

J. Appl. Polym. Sci.

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Oxygen‐permeable polyurethane ionomers with dimethyldimethoxysilane or dimethyldimethoxysilane have been successfully synthesized at our lab, and their ionomer structures have been proven by infrared spectra. In our previous paper,1 it was found that the amount of oxygen permeated through the film made by a dimethyldichlorosilane polyurethane ionomer increased with increasing the concentration of dimethyldichlorosilane. Presently, our experimental results also indicate that use of dimethyldimethoxysilane or dimethyldiethoxysilane in preparing polyurethane ionomers does substantially raise the amount of oxygen diffusing into the films made by these ionomers. These results suggest that use of dimethyldichlorosilane, dimethyldimethoxysilane, or dimethyldiethoxysilane, with strong hydrophilic property, in making polyurethane ionomer will give better oxygen permeability of siloxane‐based polyurethane ionomers. It is interesting to point out that both tensile strength and the elongation of a siloxane‐based polyurethane ionomer film become weaker as the concentration of dimethyldimethoxysilane or dimethyldiethoxysilane increases. This may be the result of intramolecular interaction of ionomer molecules, coupled with the reduction of the formation of hydrogen bonding between ionomer‐ionomer molecules and between ionomer‐water molecules. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 1932–1938, 2000

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Section: Methodsmentioning

confidence: 99%

Study of oxygen-permeable polyurethane ionomer. II

Wang

Chao

2000

J. Appl. Polym. Sci.

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“…Film formation studies were also reported by Kaminski and Urban (1997). There are some papers dealing with combinations of PU with acrylic dispersions which include PU as a cobinder of acrylic emulsions (Bakker, 1992) dispersants (Huang et al , 1997), physical mixtures and composites (Bechara and Brown, 1994; Tennebroek et al , 1997; Hegedus and Kloiber, 1996; Jan et al , 1995). Core‐shell structure latex particles of PU‐acrylate, with a core of polyacrylate and shell of PU, were also prepared (Yang et al , 1997).…”

Section: Introductionmentioning

confidence: 95%

A kinetic study in emulsion polymerization of polyurethane‐acrylate hybrids

Amalvy

2002

Pigment & Resin Technology

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Polyurethane (PU) anionomer having 2‐ethoxymethacrylate terminal groups was prepared in a methyl methacrylate/n‐butyl acrylate mixture as a reactive diluent, following a prepolymer mixing process. This prepolymer‐acrylic monomer mixture was chain extended in a water/surfactant solution using different dispersion speeds. Stability tests of PU‐acrylic monomer dispersions before polymerization were performed at different temperatures by following the particle size evolution. After the dispersion process the kinetics of batch emulsion polymerization at 70°C using different concentrations of initiator was investigated. Data are compared with published results of batch emulsion copolymerization of methyl methacrylate/n‐butyl acrylate. The effect of triethylamine, used in the prepolymer synthesis, on the emulsion polymerization of acrylic monomers was also studied. The kinetic results indicate that during emulsion polymerization of PU acrylic mixture, some coagulation takes place, mainly due to changes in ionic strength of the medium, before stable latex particles are formed. The presence of the PU prepolymer seems not to affect the kinetics of batch copolymerization of methyl methacrylate/n‐butyl acrylate monomers.

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“…In recent decades, extensive work has been completed for the synthesis of various kinds of polyurethanes and polyurethane ionomers with different properties and industrial applications [ 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ]. Polyurethane (PU) ionomer dispersions can be synthesized by a reaction of diisocyanates, polyols, and dimethylol propionic acid (DMPA, internal surfactant) and a subsequent chain extension process [ 37 , 38 , 39 ].…”

Section: Introductionmentioning

confidence: 99%

Waterborne Polyurethane Dispersions and Thin Films: Biodegradation and Antimicrobial Behaviors

Madbouly

2021

Molecules

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Biodegradable and antimicrobial waterborne polyurethane dispersions (PUDs) and their casted solid films have recently emerged as important alternatives to their solvent-based and non-biodegradable counterparts for various applications due to their versatility, health, and environmental friendliness. The nanoscale morphology of the PUDs, dispersion stability, and the thermomechanical properties of the solid films obtained from the solvent cast process are strongly dependent on several important parameters, such as the preparation method, polyols, diisocyanates, solid content, chain extension, and temperature. The biodegradability, biocompatibility, antimicrobial properties and biomedical applications can be tailored based on the nature of the polyols, polarity, as well as structure and concentration of the internal surfactants (anionic or cationic). This review article provides an important quantitative experimental basis and structure evolution for the development and synthesis of biodegradable waterborne PUDs and their solid films, with prescribed macromolecular properties and new functions, with the aim of understanding the relationships between polymer structure, properties, and performance. The review article will also summarize the important variables that control the thermomechanical properties and biodegradation kinetics, as well as antimicrobial and biocompatibility behaviors of aqueous PUDs and their films, for certain industrial and biomedical applications.

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Study of anionic polyurethane ionomer dispersant

Cited by 16 publications

References 9 publications

Study of oxygen-permeable polyurethane ionomer. II

Study of oxygen-permeable polyurethane ionomer. II

A kinetic study in emulsion polymerization of polyurethane‐acrylate hybrids

Waterborne Polyurethane Dispersions and Thin Films: Biodegradation and Antimicrobial Behaviors

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