Butylated Urea Formaldehyde Resin

Butylated Urea-Formaldehyde Resin (BUF) is a modified product of urea-formaldehyde resin (synthesized by the polycondensation of urea and formaldehyde) through butanol etherification. By reacting butanol with the hydroxymethyl groups (-CH2OH) in urea-formaldehyde resin, butoxy-substituted derivatives are formed, enhancing its properties:

Solubility: Improved solubility in organic solvents (e.g., xylene, alcohols), making it suitable for solvent-based coating systems.Stability: Reduced tendency for hydroxymethyl self-condensation, enhancing storage stability.Flexibility: Lower brittleness, improving impact resistance of coatings or adhesive layers.Compatibility: Better miscibility with other resins (e.g., alkyd resins, epoxy resins).

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Key Applications

Coatings IndustryCross-linking Agent: As a type of amino resin, it is combined with alkyd resins, acrylic resins, etc., in high-temperature curing coatings (e.g., automotive topcoats, coil coatings, industrial baking paints) to provide high gloss, hardness, and chemical resistance.Wood Coatings: Used in furniture and floor paints to enhance surface wear and scratch resistance.AdhesivesWood Bonding: Applied in particleboard and plywood production, offering improved water resistance compared to conventional urea-formaldehyde resins.Laminated Materials: Provides strong adhesion in composites with paper or fabrics.Composite MaterialsMolding Compounds: Serves as a matrix resin for electrical components and automotive parts, enhancing heat resistance and dimensional stability.Other FieldsInks: Used as a binder to improve weather resistance and adhesion of printed materials.Textile Auxiliaries: Acts as a fabric finishing agent to enhance wrinkle resistance and hand feel.

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Advantages and Limitations

Advantages: Low cost, fast curing, high hardness, and solvent resistance.Limitations: May release trace formaldehyde; less environmentally friendly compared to water-based or formaldehyde-free resins (e.g., polyurethane, acrylic). 

Fundamental Chemical Properties

Property	Specification
Chemical Name	Butylated Urea Formaldehyde Resin
CAS Number	[Not specified]
Molecular Structure	Modified UF resin with butanol etherification
Appearance	Colorless to pale yellow viscous liquid
Solid Content	50-60%
Viscosity (25°C)	200-800 mPa·s
pH Value	7.5-9.0
Solubility	Water-miscible

Key Performance Characteristics

Parameter	Test Method	Typical Value
Cure Temperature	DSC	100-130°C
Gel Time (120°C)	ISO 8985	90-180 sec
Flexural Strength	ASTM D790	80-110 MPa
Water Resistance	24h immersion	≤2% weight gain
Storage Stability	25°C/6 months	≤10% viscosity change

Application Guidelines

Application	Technical Parameters
Wood Adhesives	Press time: 60-90 sec at 110°C
Coatings	10-15% resin solids content
Paper Impregnation	40-50% pickup rate
Curing System	Acid catalyst required (pH 3-5)
Pot Life	4-8 hours (after catalyst addition)

Key Features:

Enhanced water resistance vs conventional UF resins

Lower formaldehyde emission (<0.1 ppm by chamber test)

Improved flexibility with butoxylation modification

Excellent adhesion to cellulose materials

Thermosetting with irreversible cure

Declaration: The products displayed on this website are intended exclusively for industrial applications or scientific research. They are not intended for medical, pharmaceutical, or food use. In accordance with applicable laws and regulations, purchasing organizations must hold valid qualifications and approvals.