Properties Melamine-formaldehyde coatings

Melamine—Formaldehyde Resins. The most versatile textile-finishing resins are the melamine—formaldehyde resins. They provide wash-and-wear properties to ceUulosic fabrics, and enhance the wash durabiHty of flame-retardant finishes. Butylated melamine —formaldehyde resins of the type used in surface coatings may be used in textile printing-ink formulations. A typical textile melamine resin is the dimethyl ether of trimethylolmelamine [1852-22-8] which can be prepared as follows ... 

Melamine (I,3,5-triamino-2,4,6-triazine) was first prepared by Liebig in 1835. For a hundred years the material remained no more than a laboratory curiosity until Henkel patented the production of resins by condensation with formaldehyde. Today large quantities of melamine-formaldehyde resins are used in the manufacture of moulding compositions, laminates, adhesives, surface coatings and other applications. Although in many respects superior in properties to the urea-based resins they are also significantly more expensive. 

Together, antifreeze, PET, and polyester polymers account for about 98% of the ethylene glycol produced in the United States. It is also used sometimes as a deicer for aircraft surfaces. The two hydroxyl groups in the EG molecule also make EG suitable for the manufacture of surfactants and in latex paints. Other applications include hydraulic brake fluid, the manufacture of alkyd resins for surface coatings, and stabilizers for water dispersions of urea-formaldehyde and melamine-formaldehyde The hygroscopic properties (absorbs moisture from the air) make EG useful as a humectant for textile fibers, paper, leather, and adhesives treatment. 

At an optimum addition level of only 1.5 w t %, nano-size magnesium-aluminum LDHs have been shown to enhance char formation and fire-resisting properties in flame-retarding coatings, based on an intumescent formulation of ammonium polyphosphate, pentaerythritol, and melamine.89 The coating material comprised a mixture of acrylate resin, melamine formaldehyde resin, and silicone resin with titanium dioxide and solvent. It was reported that the nano-LDH could catalyze the esterification reaction between ammonium polyphosphate and pentaerythritol greatly increasing carbon content and char cross-link density. 

We have studied the optical properties of a novel microcavity - quantum dot system consisting of a melamine formaldehyde latex microsphere coated by a thin shell of CdTe nanocrystals. The coupling between the emission from nanocrystals and spherical cavity modes was realized. Periodic narrow peaks of the emission spectra corresponding to the whispering gallery modes were detected and a threshold behavior of the emission intensity on excitation power was observed. 

Chem. Descrip. Butylated melamine-formaldehyde resin in n-butanol Uses Crosslinking agent for low temp, or ambient acid cured systems for kitchen cabinet and wood furniture finishes, metal coatings modifying resin for fast curing nitrocellulose coatings Properties APHA 30 max. color dens. 8.55-8.85 Ib/gal vise. (Gardner-Holdt) Y-Zj flash pt. (PMCC) 42 C 64.5-68.5% solids Resimene 7512 [Solutia]... 

Melamine, polymer with formaldehyde. See Melamine-formaldehyde resin Melamine pyrophosphate CAS 15541-60-3 Formula 2C3H6N6 H4O7P2 Properties Solid sol. 0.09 g/100 ml water Uses Flame retardant additive for polymers, latex intumescent coating formulations thermally stable Manuf./Distrib. Akzo Nobel http //www.akzonobei.com. Anhydrides Chems. http //www.broadview-tech.com. Great Lakes http //www.greatiakeschem.com, Miljac http //www.miijac.com, StanChem http //WWW. aibi. com... 

S. Zafar, F. Zafar, U. Riaz and S. Ahmad, Synthesis, characterization, and anticorrosive coating properties of waterborne interpenetrating polymer network based on epoxy-acrylic-oleic acid with bntylated melamine formaldehyde , / Appl Polym Sci, 2009,113, 827-38. 

Melamine/formaldehydes cross-link with epoxy resins to give low-colour coatings with good physical properties, chemical resistance, and no effect on... 

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