Butylated melamine resins

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. 

Chem. Descrip. Mixed ether and butylated melamine resin CAS 9003-08-1 UN 3082... 

Hexamethoxymethyl melamine (HMMM) resins are less reactive than butylated melamine resins and always require the incorporation of acid catalysts to cure the coating. Para-toluene sulphonic acid (1-2% on total resin) is used extensively in hydroxy aciylic/HMMM formulations. 

Formulating principles remain basically the same, but the major differences lie in the choice of a more flexible resin (Synolac 25S (Ex CV)) and much reduced crosshnking density. BE 615 (Ex BIP) is a n-butylated melamine resin of medium reactivity. Application conditions will again be much the same at 4-6 gsm and bake conditions of 150°C for 10 minutes at pmt. 

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 ... 

W. Lindlaw, The Preparation of Butylated Erea—Formaldehyde and Butylated Melamine Formaldehyde Resins Using Celanese Formcel and Celanese Paraformaldehyde. 

Additional commercial markets for 1-butanol include plasticizer esters (eg, dibutyl phthalate), butylated melamine—formaldehyde resins, and mono-, di-, and tributylamines. 

Good quality steel is used and electrozinc is preferred for washing machines. Steel is pretreated with iron phosphate for economy electrozinc with a fine crystal zinc phosphate. No primer is normally used 25-40/im of finish is applied direct to metal. The required properties are best obtained with a thermosetting acrylic or polyester/melamine-formaldehyde finish. Self-reactive acrylics are usually preferred these resins contain about 15 Vo 7V-butoxymethyl acrylamide (CH2=CH —CO —NH —CHj—O —C4H,) monomer and cure in a manner similar to butylated melamine-formaldehyde resins. Resistance or anti-corrosive properties may be upgraded by the inclusion of small amounts of epoxy resin. Application is usually by electrostatic spray application from disc or bell. Shapes are complex enough to require convected hot-air curing. Schedules of 20 min at 150-175°C are... 

Addition of glycerol, phthalic anhydride and butylated melamine formaldehyde resins is sometimes found to improve the thermosetting properties of silicone resins. Methylsilyl triacetate has the same effect in certain cases. Some silicone resins can be advantageously modified by the addition of polyvinyl acetyl resins or nitroparaffins. 

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. 

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. 

Thermal Cure. Thermal cure of an AM 10 was compared with that of Resimene 755 a methyl butyl coetherified melamine resin. Both mel unines were formulated in a clear topcoat at 25, 40, and 50% of total resin solids (TRS) with Joncryl 500 (S.C. Johnson 6 Sons) as the polyol coreactant. 

Fully alkylated amino resins require strong acid catalysis for fast and/or low-temperature cross-linking. Their catalysis mechanism is different from that of partially alkylated resins which respond to weak acid catalysts or general acid catalysis. A fully alkylated melamine resin catalyzed by a strong acid catalyst is a faster curing (cross-linking) agent than a partially butylated amino resin. 

Chem. Descrip. Butylated melamine-formaldehyde resin in 60% n-bu-tanol and 40% xylene... 

Chem. Descrip. Highly butylated melamine-formaldehyde resin in 100% n-butanol... 

Chem. Desaip. Butylated melamine-tormaldehyde resin In 60% n-bu-lanol and 40% xylene... 

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]... 

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