Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Allnex MACRYNAL SM 2703 80BACX Hydroxyl Acrylic Resin

Allnex MACRYNAL SM 2703 80BACX is a hydroxyl-functional acrylic resin designed for high-performance 2K polyurethane coatings. It offers excellent gloss retention, weather resistance, and compatibility with isocyanates. Ideal for automotive refinish and industrial topcoats requiring durability, clarity, and fast cure response. Solvent-based, low-viscosity, and optimized for BACX solvent system.
  • allnex macrynal sm 2703 80bacx hydroxyl acrylic resin_3f4c2a05
  • allnex macrynal sm 2703 80bacx hydroxyl acrylic resin_3f4c2a05

Features Of Allnex MACRYNAL SM 2703 80BACX Hydroxyl Acrylic Resin

  1. High hydroxyl functionality for excellent crosslink density with melamine and polyisocyanate curing agents.

  2. Optimized molecular weight distribution for superior flow, leveling, and film formation in high-gloss coatings.

  3. Low VOC formulation compatibility — designed to support solvent-borne systems meeting stringent regulatory requirements.

  4. Enhanced weathering resistance and UV stability for durable exterior performance.

  5. Good compatibility with common acrylic, polyester, and cellulose ester resins in multi-resin binder systems.

Typical Applications Of Allnex MACRYNAL SM 2703 80BACX Hydroxyl Acrylic Resin

  1. Automotive OEM topcoats and clearcoats.

  2. Industrial maintenance coatings for metal substrates.

  3. General-purpose coil coatings requiring high durability and gloss retention.

  4. Prefinished building products including aluminum composite panels (ACP) and architectural extrusions.

  5. High-performance refinish coatings for automotive and heavy-duty equipment.

Specifications Of Allnex MACRYNAL SM 2703 80BACX Hydroxyl Acrylic Resin

Chemical TypeHydroxyl-functional acrylic copolymer
Product FormLiquid solution
AppearanceClear, pale yellow liquid
Solvent SystemButyl acetate / xylene blend
Hydroxyl Value (mg KOH/g)80–90
Acid Value (mg KOH/g)< 5
Non-Volatile Content (% w/w)78–82
Viscosity (mPa·s, 25°C, #4 spindle, 20 rpm)1,200–2,000


Allnex MACRYNAL SM 2703 80BACX Hydroxyl Acrylic Resin – Frequently Asked Questions (FAQ)

Q1: What is the primary function of MACRYNAL SM 2703 80BACX in coating formulations?

A: MACRYNAL SM 2703 80BACX serves as a hydroxyl-functional acrylic resin designed to act as a reactive binder in two-component polyurethane and melamine-cured systems, contributing to film formation, hardness development, and chemical resistance.


Q2: Is this resin suitable for high-solids or low-VOC coating applications?

A: Yes — its formulation supports reduced solvent demand and is commonly incorporated into high-solids and low-VOC industrial coatings, especially where balanced viscosity, pot life, and cure performance are required.


Q3: Which crosslinkers are typically compatible with MACRYNAL SM 2703 80BACX?

A: It is broadly compatible with aliphatic and aromatic isocyanate crosslinkers (e.g., HDI- and IPDI-based adducts or biuretes) as well as amino resins such as highly methylated melamines, depending on the desired cure schedule and end-use requirements.


Q4: How should this resin be stored to maintain stability and performance?

A: Store in tightly sealed original containers in a cool, dry, and well-ventilated area away from direct sunlight, heat sources, and strong oxidizing agents. Prolonged exposure to elevated temperatures or moisture may affect viscosity and reactivity.



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