Cymel UI-27-IX Isobutoxymethyl methylol urea Cytec Crosslinking / Coupling / Curing Agents >> Amine Acrylic/Acrylate Resins Alkyd Resins Polyester Coatings >> Solventborne General Industrial /Maintenance Isobutanol/xylene DELIVERY FORM Viscous liquid 66% in isobutanol/xylene APPLICATION PROPERTIES In solvent borne systems CYMEL Ul-27-IX resin is an isobutylated urea-formaldehyde crosslinking agent with a medium degree of alkylation, a medium methylol content and low imino functionality. CYMEL Ul-27-IX 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 Ul-27-IX resin is suitable for a wide range of industrial stoving primers formulations, providing excellent adhesion and intercoat adhesion properties. In water borne systems CYMEL Ul-27-IX resin is insoluble in water and, because of its polymeric and hydrophobic nature, is not recommended in water borne systems. Catalysis CYMEL Ul-27-IX 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. Stability Formulated systems containing CYMEL Ul-27-IX resin have to be stabilised with primary alcohols, amines or with a combination of these. SOLUBILITY Alcohols Complete Ketones Complete Esters Complete Aromatic hydrocarbons Complete Aliphatic hydrocarbons Partial Water Not dilutable COMPATIBILITY Alkyd resins Very good Polyester resins Very good Acrylic resins Very good CYMEL Ul-27-IX resin has FDA acceptance for food-contact use as directed in the following section of the Code of Federal Regulations: 21 CFR 175.300 (Resinous and polymeric coatings). Isobutylated urea-formaldehyde crosslinking agent with a medium degree of alkylation, a medium methylol content and low imino functionality. Can be used in solvent borne systems, very effective crosslinking agent for backbone polymers containing hydroxyl, carboxyl or amide functional groups such as alkyd/polyester or acrylic resins. Suitable for a wide range of industrial stoving primers formulations, providing excellent adhesion and intercoat 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. Formulated systems containing it have to be stabilised with primary alcohols, amines or with a combination of these. Complete solubility in ketones, esters, alcohols, aromatic hydrocarbons. Not dilutable in water. Partial solubility in aliphatic hydrocarbons. Very good compatibility with alkyd resins, polyester resins, acrylic resins.