Etherified amino resins: synthesis and reactions in surface coatings applications

Santer, J. O.

doi:10.1016/0033-0655(84)80014-x

Cited by 42 publications

(14 citation statements)

References 16 publications

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“…And then, for functional latexes with hydroxyl groups, the amino resins or blocked isocyanates were often used as crosslinkers and for latexes with carboxyl groups, the polycarbodiimide, polyaziridine and polyoxazoline were usually used as crosslinkers [18–20]. It has been noticed that, at present, chemically reactive acrylate-based latexes containing a special core-shell structure cross-linked by waterborne melamine-formaldehyde resin are rarely reported [21, 22]. Therefore, in this work, a core-shell composite polymer latex, specially, with P(MMA- co -BA) as the core, and P(EHA- co -GMA) as the shell was synthesized.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Core-Shell Acrylate Based Latex and Study of Its Reactive Blends

Liu

Fan

Tang

et al. 2008

IJMS

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Techniques in resin blending are simple and efficient method for improving the properties of polymers, and have been used widely in polymer modification field. However, polymer latex blends such as the combination of latexes, especially the latexes with water-soluble polymers, were rarely reported. Here, we report a core-shell composite latex synthesized using methyl methacrylate (MMA), butyl acrylate (BA), 2-ethylhexyl acrylate (EHA) and glycidyl methacrylate (GMA) as monomers and ammonium persulfate and sodium bisulfite redox system as the initiator. Two stages seeded semi-continuous emulsion polymerization were employed for constructing a core-shell structure with P(MMA-co-BA) component as the core and P(EHA-co-GMA) component as the shell. Results of Transmission Electron Microscopy (TEM) and Dynamics Light Scattering (DLS) tests confirmed that the particles obtained are indeed possessing a desired core-shell structural character. Stable reactive latex blends were prepared by adding the latex with waterborne melamine-formaldehyde resin (MF) or urea-formaldehyde resin (UF). It was found that the glass transition temperature, the mechanical strength and the hygroscopic property of films cast from the latex blends present marked enhancements under higher thermal treatment temperature. It was revealed that the physical properties of chemically reactive latexes with core-shell structure could be altered via the change of crosslinking density both from the addition of crosslinkers and the thermal treatment.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Core-Shell Acrylate Based Latex and Study of Its Reactive Blends

Liu

Fan

Tang

et al. 2008

IJMS

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“…Typically, for acrylic latex cured with melamine resins, it has been reported that not all the six reactive groups on the melamine react and on an average the melamine has an average functionality of 4.5. 25 As summarized in Table III, the MEK double rubs increased when the % active catalyst was increased from 0.125 to 0.25% and then it plateaued. The level of active catalyst (based on the resin solids) was set at 0.25% as it minimized the acid used and gave the optimum performance for melamine cure of acrylic CUPs when baked at 150 C for 30 min.…”

Section: Melamine-cured Cup Coatingsmentioning

confidence: 91%

Synthesis and application of acrylic colloidal unimolecular polymers as a melamine thermoset system

Mistry

Natu

Mark

2014

J of Applied Polymer Sci

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Acrylic polymers were synthesized with a ratio of 1 : 7 or 1 : 8 of acrylic acid to acrylic ester monomers to produce an acid‐rich resin. The polymers were water reduced and solvent was stripped to produce colloidal unimolecular polymers (CUPs). These particles were typically 3–9 nm in diameter depending on the molecular weight. They were then formulated into a clear coating with melamine as the crosslinker with thermal curing. Compared to commercial latex films, these melamine‐cured acrylic CUPs had a distinct advantage of having a near‐zero volatile organic compound, better availability of surface functional groups, and improved water resistance. The coatings were evaluated for their methyl ethyl ketone resistance, adhesion, hardness, gloss, flexibility, abrasion, and impact resistance properties. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40916.

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“…Secondly, the melamine resins also undergo self-condensation reaction via the methylol groups. Both of these reactions are accelerated by the acid catalysts [41][42][43]. The standard, without any catalyst, did not show any change in the pencil hardness values while the indentation hardness increased slightly as the cure time was varied from 10 min to 30 min.…”

Section: Effectiveness Of Mma-amps Based Cup Catalyst In Curing Oh-lamentioning

confidence: 99%

“…often required for curing of these acrylic-melamine resin systems. Hydroxyl groups and carboxylic acid groups on the acrylic resin react with the amino resin by means of etherification, esterification and amidation reactions [12]. These reactions are promoted by the addition of an acid catalyst.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of an acid catalyst for acrylic-melamine resin systems based on colloidal unimolecular polymer (CUP) particles of MMA-AMPS

Natu

Mark

2015

Progress in Organic Coatings

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Etherified amino resins: synthesis and reactions in surface coatings applications

Cited by 42 publications

References 16 publications

Synthesis and Characterization of Core-Shell Acrylate Based Latex and Study of Its Reactive Blends

Synthesis and Characterization of Core-Shell Acrylate Based Latex and Study of Its Reactive Blends

Synthesis and application of acrylic colloidal unimolecular polymers as a melamine thermoset system

Synthesis and characterization of an acid catalyst for acrylic-melamine resin systems based on colloidal unimolecular polymer (CUP) particles of MMA-AMPS

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