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

Abstract

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.

Advances in single chain technology

“…We will not enter into details here; instead, we refer the interested reader to previously published reviews focused on intra-chain cross-linking techniques for SCNP construction. Hence, different non-covalent bonding-based strategies have been introduced over recent years to afford the preparation of responsive SCNPs, such as benzamide dimerization 77 developed in 2008, ureido-pyrimidinone (UPY) dimerization [78][79][80][81] in 2009, benzene-tricarboxamide (BTA) helical stacking 10,11,[82][83][84][85][86][87][88] in 2011, cucurbit[n]uril complexation, 89,90 hydrophobic L-phenylanaline (Phe)-Phe interactions 91,92 and 3,3 0 -bis(acylamino)-2,2 0 -bipyridine (BiPy-BTA) self-assembly 93 in 2012, Rh complexation, 94,95 charged amphiphilic random copolymer self-assembly [96][97][98][99][100][101] and Cu complexation in 2013, 13,72 and finally, neutral amphiphilic random copolymer self-assembly 102 in 2014. 11.…”

“…11. Hence, different non-covalent bonding-based strategies have been introduced over recent years to afford the preparation of responsive SCNPs, such as benzamide dimerization 77 developed in 2008, ureido-pyrimidinone (UPY) dimerization [78][79][80][81] in 2009, benzene-tricarboxamide (BTA) helical stacking 10,11,[82][83][84][85][86][87][88] in 2011, cucurbit[n]uril complexation, 89,90 hydrophobic L-phenylanaline (Phe)-Phe interactions 91,92 and 3,3 0 -bis(acylamino)-2,2 0 -bipyridine (BiPy-BTA) self-assembly 93 in 2012, Rh complexation, 94,95 charged amphiphilic random copolymer self-assembly [96][97][98][99][100][101] and Cu complexation in 2013, 13,72 and finally, neutral amphiphilic random copolymer self-assembly 102 in a pioneering work by Murray and Fulton, 103,104 and coumarin dimerization, 105,106 both reported in 2011, disulphide bonds 107 in 2012, as well as enamine bonds 108 and anthracene dimerization 109 in 2014. For the interested reader, we suggest recent reviews of this field.…”

Synthesis of Polyacrylate‐Based Chalcone Containing Different Donor Moieties and Studies on their Optical, Electrochemical, and Thermal Properties

“…16,17 Intermolecular donoracceptor systems typically consist of electron-donating groups (e.g., small conjugated molecules) and electron acceptors (e.g., heteroatom-located skeleton). 18 The well arrangement of donor-acceptor will results in proper understanding of highest occupied molecular orbital and lowest unoccupied molecular orbital levels. By introducing chalcone group, it indicates that the chalcone group helps to increase the intra molecular charge transfer and reduces the optical band gap.…”

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

“…The resin synthesis and water-reduction process for MMA-BMA-MAA polymers has been discussed elsewhere [20]. CUPs were prepared by water-reduction in a manner similar to the CUPs based on MMA-AMPS.…”