Acrylic-melamine resin coating

Coatings containing P.Y.151 are very lightfast and durable. Systems based on acrylic melamine resin, for instance, were exposed to the Florida climate for one year and then evaluated. 1 1 reductions with TiOz equalled step 5 on the Gray Scale for weatherfastness, while 1 3 Ti02 reductions matched step 4, and 1 35 reduced samples coincided with step 3-4. Comparative values for P.Y.154 and 175 are listed for the respective pigments. P.Y.151 is fast to overcoating up to 160°C. 

Uses Crosslinking agent in melamine resin coating systems, general industrial finishes, coil-coating enamels, appliance finishes, useful with alkyd, polyester, thermosetting acrylic, epoxy, and cellulose resins Properties Gardner 2 max. clear, vise, liq. limited water-sol. dens. 10.0 Ib/gal vise. (G-H) X-Z2 flash pt. > 180 F 98% NV Cymel 350 [Cytecind.j... 

UV absorber, acrylic coatings Cyasorb UV 9 Permyl B100 UV absorber, acrylic melamine resins Cyasorb UV-2337 UV absorber, acrylic melamines Cyasorb UV1164A Cyasorb UV1164L Sanduvor VSU Powd. 

Nishino, G. Kanda, S. Sugimoto, H. Inomata, K. Nakanishi, E., Preparation and Coating Properties of an Acrylic Melamine Resin Containing Silicone Segments. Polym. Bull. 2012, 68, 2049-2060. 

Tsuge et al. [986] have reported DHS-GC-FID (wide-bore capillary column) in the study of paint coatings (acrylic/melamine resin/(LS-440 or LS-292 (HALS), Tinuvin 1130 or Tinuvin 900, surface modifier, organic solvent)). DHS-GC provides a sensitive technique for quantification of HALS and UVA occluded in cured polymeric materials such as coating paints. The optimum thermal desorption temperature was decided empirically. The system permitted fairly accurate determination of HALS (LS-440 and LS-292), which were almost quantitatively recovered, within an analysis time of 1.5 h. Reproducibility for Tinuvin 900 was less satisfactory, whereas Tinuvin 1130 was not observed because of its extremely low volatility. 

Aluminum triphosphate has limited solubility in water and is frequently modified with either zinc or silicon to control both solubility and reactivity [23,29]. Researchers have demonstrated that aluminium triphosphate is compatible with various binders, including long-, medium-, and short-oil alkyds epoxies epoxy-polyesters and acrylic-melamine resins [73-76]. Chromy notes that it is particularly effective on rapidly corroding coatings it may therefore be useful in overcoating applications [39]. 

Polymers are used frequently in paints and varnishes. These materials are usually filled with opaque materials and are difficult to separate or analyze by other procedures. Pyrolysis can be used to identify the nature of the paint, to measure quantitatively residual monomers, for quality control, and to examine additives [5, 13, 14]. Paints may contain a variety of polymers and copolymers such as vinyl derivatives, polyurethanes, phthalate polyesters, etc. Varnishes may contain various copolymers, siloxanes, etc. and can have a complex composition. This composition can be successfully analyzed using analytical pyrolysis. For example, the composition of a coating material consisting of the terpolymer poly(2-hydroxyethyl methacrylate-co-butyl acrylate-co-ethyl methacrylate) crosslinked with butoxy melamine resin has been analyzed with excellent results based on various monomer ratios resulting from pyrolysis at 590° C [15]. 

Branched acrylic polymers based upon the copolymerization of acrylates and related monomers with methacrylate macromonomers are particularly useful in waterborne coatings. A macromonomer based upon isobutyl methacrylate, 2-ethylhexyl methacrylate, and 2-hydroxyethyl methacrylate was copolymerized with butyl acrylate, 2-hydroxyethyl acrylate, meth-acrylic acid, methyl methacrylate, and styrene.518 After neutralization with dimethylethanolamine or inorganic bases, the polymer could be cross-linked with melamine resin on a metal surface. These systems may be used for either pigmented layers or clear coats. 

Use Preparation of esters, especially butyl acetate solvent for resins and coatings plasticizers dyeing assistant hydraulic fluids detergent formulations dehydrating agent (by azeotropic distillation) intermediate butylated melamine resins glycol ethers butyl acrylate. 

The acrylic resin used was Rohm and Haas Co.s QR-496 ( 4), so the exact nature of the polymer is not known. It is hydroxy functional, thus requiring an aminoplast for proper cure commercially modified hexa-methylol melamine resin was used for this purpose. During the first part of the investigation the acrylic resin was used without the melamine resin, but for final evaluation it was incorporated to give a more realistic commercial coating system. 

The ether linkage formed during the crosslinking reaction of amino formaldehyde resins with hydroxy functional polymers is sensitive to acid hydrolysis. [2.197] Exposure to acid rain is sufficient to damage high solids acrylic/melamine coatings. The use of either active CH [2.198] or NH functional polymers [2.199] creates linkages... 

Side and cross members are pretreated by blasting and phosphating. An electrode-posited primer coating follows and is sometimes immediately overcoated with a topcoat based on an air-drying alkyd or epoxy ester, or on an oven-drying alkyd-melamine resin combination. After assembly of the truck, a third layer (i.e., a second topcoat) is applied that serves as a supply finish. These finishes are mostly two-pack acrylic aliphatic isocyanate topcoats. Water-based two-pack systems and powder coatings are the most recent developments. 

Chem. Descrip. Hexabutoxymethyl melamine resin Uses Crosslinking agent for alkyd/polyester or acrylic resins, tor use in solv.-borne coatings, acid curing wood finishes, resinous/polymeric food-contact coatings... 

Chem. Descrip. Aluminum trihydrate CAS 21645-51-2 EINECS/ELINCS 244 92-7 Uses Flame retardant, filler for polyester, acrylic, melamine, and epoxy resins, polyurethanes (casting resins), powd. coatings Properties Powd. = 6 pm median particle size bulk dens. = 550 kg/m oil absorp. = 18 cmViOO g conduct, [efl 130 pS/cm < 0.3% moisture Martinal ON-908 [Martinswerk GmbH Lonza]... 

Chem. Descrip. Etherified acrylated melamine/formaldehyde resin (62-68%) in tripropylene glycol diacrylate Uses Crosslinking agent in radiation-cure applies, such as polyester and epoxy acrylates, unsat. polyesters, aliphatic and aromatic urethane acrylates, and most acrylate monomer diluents imparts hardness and gloss, stain and chem. resist, to coatings, paper coatings Features Cured by free radical polymerization initiated by U V or thermal processing... 

Uses Acrylic for crosslinking with melamine resins for prod, of high-gloss weather-resist, finishing paints, wh. and colored one-coat electrodeposition coatings... 

Another approach using carbamate-functional reactants is to react a polyisocyanate such as IPDI isocyanurate or HDI isocyanurate with hydroxypropyl carbamate (50). These carbamates are used in automotive clear coats with an MF resin that has been partially reacted with butyl carbamate to reduce its fimc-tionality. The remaining methoxymethyl groups of the melamine resin react with the carbamate groups of the isocyanurate-derived carbamate to give cross-linked films with outstanding environmental etch and mar resistance. The use of a combination of a carbamate-functional acrylic resin, a polycarbamate derived from a polyisocyanate, and an MF resin has also been patented (51). 

Hydroxyl Acrylic Resins [13] AJlyl alcohol and allyl alkoxylate have l n incorporated into hydroxyl acrylic resins to provide the pendant hydroxyl groups for crosslinking reaction. The resins are crosslinked with melamine or an isocyanate to form acrylic-melamine coatings or acrylic-polyurethane coatings, respectively. The coatings can be used as automotive topcoat or other high performance industrial coatings. 

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