Cymel UB-24-BX Butoxymethyl methylol urea Cytec Crosslinking / Coupling / Curing Agents >> Amine Acrylic/Acrylate Resins Alkyd Resins Cellulosic Resins Polyester Vinyl Coatings >> Solventborne Wood & Furniture Coatings n-Butanol/xylene DELIVERY FORM Viscous liquid 63% in n-Butanol/xylene APPLICATION PROPERTIES In solvent borne systems CYMEL UB-24-BX resin is a butylated urea-formaldehyde crosslinking agent with a medium degree of alkylation, a medium methylol content and low imino functionality. CYMEL UB-24-BX resin is a very effective crosslinking agent for backbone polymers containing hydroxyl, amide and, to some extent, carboxyl functional groups such as alkyd/polyester or acrylic resins. CYMEL UB-24-BX resin is suitable for use in both wood coating and stoving systems, providing very good flow, film hardness and adhesion properties. In water borne systems CYMEL UB-24-BX resin is insoluble in water and, because of its polymeric and hydrophobic nature, is not recommended in water borne systems. Catalysis CYMEL UB-24-BX resin requires weak acid catalysts for cure at normal baking schedules. The acidity of the primary film former is usually sufficient to initiate the curing process. In two-pack acid curing systems, strong acids like paratoluene sulphonic acid are recommended as the best catalysts. In one-pack acid curing finishes, weak acids with a pKa value higher than 1.9 are strongly recommended. Stability Formulated systems containing CYMEL UB-24-BX resin have to be stabilised with primary alcohols, amines or with a combination of these. Acid curing systems are usually stabilised only by addition of adequate amounts of primary alcohols. SOLUBILITY Alcohols Complete Ketones Complete Esters Complete Aromatic hydrocarbons Complete Aliphatic hydrocarbons Partial Water Not dilutable COMPATIBILITY Alkyd resins Very good Polyester resins Good Acrylic resins Good Nitrocellulose Good Cellulose acetate butyrate Good Polyvinyl butyral Good DELIVERY FORM Viscous liquid 63% in n-Butanol/xylene APPLICATION PROPERTIES In solvent borne systems CYMEL UB-24-BX resin is a butylated urea-formaldehyde crosslinking agent with a medium degree of alkylation, a medium methylol content and low imino functionality. CYMEL UB-24-BX resin is a very effective crosslinking agent for backbone polymers containing hydroxyl, amide and, to some extent, carboxyl functional groups such as alkyd/polyester or acrylic resins. CYMEL UB-24-BX resin is suitable for use in both wood coating and stoving systems, providing very good flow, film hardness and adhesion properties. In water borne systems CYMEL UB-24-BX resin is insoluble in water and, because of its polymeric and hydrophobic nature, is not recommended in water borne systems. Catalysis CYMEL UB-24-BX resin requires weak acid catalysts for cure at normal baking schedules. The acidity of the primary film former is usually sufficient to initiate the curing process. In two-pack acid curing systems, strong acids like paratoluene sulphonic acid are recommended as the best catalysts. In one-pack acid curing finishes, weak acids with a pKa value higher than 1.9 are strongly recommended. Stability Formulated systems containing CYMEL UB-24-BX resin have to be stabilised with primary alcohols, amines or with a combination of these. Acid curing systems are usually stabilised only by addition of adequate amounts of primary alcohols. PRODUCT SPECIFICATIONS Property Range Method of Analysis Appearance Clear liquid Visual Colour, APHA max 50 ISO 6271 Non volatile content 63 ± 2% Pan, 1h/100°C Viscosity, 23°C 1700-2600 ISO 3219/11910 mPa.s Acid number 2-5 mg KOH/g ISO 3682 DESCRIPTIVE DATA Property Typical Value Method of Analysis Density, 23°C 1020 kg/m3 IS0 2811 Flash point 29°C IS0 3679 Free formaldehyde 0.4% IS0 9020 SOLUBILITY Alcohols Complete Ketones Complete Esters Complete Aromatic hydrocarbons Complete Aliphatic hydrocarbons Partial Water Not dilutable COMPATIBILITY Alkyd resins Very good Polyester resins Good Acrylic resins Good Nitrocellulose Good Cellulose acetate butyrate Good Polyvinyl butyral Good Butylated urea-formaldehyde crosslinking agent with a medium degree of alkylation, a medium methylol content and low imino functionality. Very effective crosslinking agent for backbone polymers containing hydroxyl, carboxyl or amide functional groups such as alkyd/polyester or acrylic resins. In solvent borne systems, suitable for use in both wood coating and stoving systems, providing very good flow, film hardness and adhesion properties. Insoluble in water and, because of its polymeric and hydrophobic nature, is not recommended in water borne systems. Requires weak acid catalysts for cure at normal baking schedules. The acidity of the primary film former is usually sufficient to initiate the curing process. In two-pack acid curing systems, strong acids like paratoluene sulphonic acid are recommended as the best catalysts. In one-pack acid curing finishes, weak acids with a pKa value higher than 1.9 are strongly recommended. Formulated systems containing it have to be stabilised with primary alcohols, amines or with a combination of these. Complete solubility in ketones, esters, aromatic hydrocarbons, alcohols. Not dilutable in water. Partial solubility in aliphatic hydrocarbons. Very good compatibility with alkyd resins, polyester resins, acrylic resins, nitrocellulose cellulose acetate butyrate, polyvinyl butyral.