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Butylated Urea Formaldehyde Resin

Butylated Urea Formaldehyde Resin
  • Butylated Urea Formaldehyde Resin
供应商: Standard International Group (HK) Limited

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

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

Key Applications

  1. Coatings Industry
    • Cross-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.
  2. Adhesives
    • Wood 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.
  3. Composite Materials
    • Molding Compounds: Serves as a matrix resin for electrical components and automotive parts, enhancing heat resistance and dimensional stability.
  4. Other Fields
    • Inks: 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.

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

    PropertySpecification
    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

    ParameterTest MethodTypical 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

    ApplicationTechnical 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 resistancevs conventional UF resins

    Lower formaldehyde emission(<0.1 ppm by chamber test)

    Improved flexibilitywith butoxylation modification

    Excellent adhesionto cellulose materials

    Thermosettingwith irreversible cure


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