ACRYLIC-MELAMINE RESIN

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. 

Acrylated Melamine resins were prepared by reacting different levels of acrylamide with a fully alkylated coetherified melamine resin containing methyl and butyl groups at an approximate ratio of 1 1. They were prepared with 0.5, 1.0, 1.5, and 2.5 moles of acrylamide per triazine ring. Throughout the paper a bis-phenol A epoxy acrylate resin (Ebecryl 3700 from Radcure Specialties) and an aliphatic urethane acrylate resin (Ebecryl 8800 from Radcure Specialties) are used as controls. 

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. 

The major component of the paint is an alkyd-melamine or acrylic-melamine resin. When hydrolysis is completed, the dimethylether bonds (—CHj—O—CH2—) giving the crosslinks, are broken. This can be easily detected by infrared spectroscopy. 

The pressurized hydrolysis technology is available for all TP bumpers of Toyota cars, which are painted with acrylic-melamine resin or alkyd-melamine resin. However, the recovered bumpers contain some repaired ones which are repainted with urethane paint film. The pressurized hydrolysis technology is not available for the urethane paint film because this film is not hydrolyzable with water vapor in such conditions. To maintain the high performance of the recycled material, the repaired bumper must be sorted from the recovered TP bumpers. Considering the difference of the chemical reaction of the paint films with dye agents, a paint film dyeing method was develop>ed. A nonrepaired bumper which is painted with acrylic- or alkyd-melamine resin becomes red and fluorescent color when a mixture of dye agent of Acid Red 52 and a solvent of lactic acid are applied. On the other hand, a repaired bumper... 

Polyester cloth treated with aqueous acrylic emulsion (acrylic melamine resin) containing 20% of 0.005 pm ATO particles and baked to form a cloth showing the half-life of an electric charge of one sec. The front and back temperatures are 27 °C and 26 °C, respectively, after irradiating with 300 W lamp at 20 °C and 60% RH. "... 

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]. 

Most of the surface sizes used in North America are modified styrene maleic anhydride (SMA) copolymers. Commercially available materials include Scripset (Monsanto/Hercules Inc.), Cypres (Cytec), Sursize (Akzo Nobel), MSA (Morton), NovaCote (Georgia Pacific), and HTl (Hopton Technologies). Styrene acrylate emulsions that are commonly used include Jetsize and Unibond (Akzo Nobel), Basoplast (BASF), and Cypres (Cytec). Other materials used as surface sizes include acrylonitrile acrylate copolymer (Basoplast, BASF), stearylated melamine resin (Sequapel, Sequa), polyurethane (Graphsize, Vining Chemicals), and diisobutylene maleic anhydride copolymers (Baysynthol, Bayer). 

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. 

MAJOR POLYMER APPLICATIONS melamine resin, polyester, alkyd, acrylic, rubber, PP, ABS, PVC... 

MAJOR POLYMER APPLICATIONS alkyd, polyurethane, acrylic, rubber, melamine resins, phenoxy, polyester,... 

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 quantity of amine added is 63% of theory based on the titrated acidity. Both the amine and the melamine resin were dissolved in the acrylic solution prior to the addition of the water which was accomplished in the same manner as for the epoxy ester. During preliminary studies the hexamethylolmelamine was omitted and the water correspondingly reduced. The electrodeposited films were baked for Vz hours at 175°C. 

Acrylated melamines can be made by reacting acryl2unide with etherified mel2unine resins thereby incorporating acrylic... 

Figure 8 compares the Tukon hairdness of the melamine and AM 10 films. Films of each material were drawn on primed Bonderite 40 with a 4 blade and cured for 30 minutes at 250° F. Both formulations were catalyzed with 0.8% PTSA on TRS. For the melamine cured films, hardness increases slightly as melamine content is increased from 25 to 40%, but then is reduced at 50% melamine content, probably due to plasticization by unreacted excess melamine functionality. For the acrylated melamine, hardness increases monotonically, probably because of the lower alkoxy functionality and higher Tg of the AM resin compared to the melamine resin. At 40% AM the Tukon hardness is similar to that achieved with a 25% melamine resin. 

Following a better rmderstanding of the nature of polymers, there was a phenomenal growth in the numbers of polymeric products that achieved commercial success in the period between 1925 and 1950. In the 1930s, acrylic resins (signs and glazing) polystyrene (toys, packaging and housewares industries) and melamine resins (dishware, kitchen countertops, paints) were introduced. 

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... 

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