Here is a Two-Pack Acid-Cured Urea-Formaldehyde Alkyd Matt Clear Formulation, optimized for wood surfaces where a soft, elegant, non-reflective finish is desired – e.g., modern furniture, architectural woodwork, and flooring.
✅ Matt Clear For Wood – Two-Pack System
🎨 Pack A – Base (Matt Resin Component)
Raw Material
Function
% by weight
Short Oil Alkyd Resin (50–60% solids)
Film former
25.0
Urea-Formaldehyde Resin (60% solids)
Crosslinker
20.0
Butylated Melamine Resin
Toughness / Hardness enhancer
5.0
Butyl Acetate
Solvent
10.0
Isobutanol
Flow & co-solvent
5.0
Matt Agent (e.g. Silica, 5–7 µm)
Matting, gloss reduction
7.0
Wax Dispersion (optional)
Scratch resistance, soft feel
1.0
Silicone Leveling Agent
Flow modifier
0.3
Polyurethane-compatible Defoamer
Foam control
0.3
Cellulose Acetobutyrate (CAB)
Flow & leveling support
1.5
Xylene or Aromatic 150
Viscosity adjuster
To 100%
⚗️ Pack B – Catalyst (Acid Component)
Raw Material
Function
% by weight
p-Toluenesulfonic Acid (10% in IPA)
Acid catalyst
10.0
Isopropyl Alcohol
Solvent carrier
90.0
⚙️ Mixing & Application
Mixing Ratio (A:B) → 100:7 by weight
Pot Life → ~6 hours at 25°C
Application → Spray recommended (air or airless); brushing may leave marks in matt finishes
Viscosity → ~40–60 seconds Ford Cup #4
Drying Schedule:
Touch dry: 30–45 min
Hard dry: 8–12 hours
Full cure: 5–7 days
🔍 Key Performance Parameters
Property
Value / Range
Gloss @ 60°
15–25 GU (adjustable)
Hardness
H–2H (pencil hardness)
Adhesion
Excellent (on wood)
Chemical Resistance
Good – water/alcohol
Scratch Resistance
Good (with wax additive)
Clarity
Slightly opalescent due to matting agent
🎯 Adjustments You Can Make
Lower gloss further? → Increase silica matting agent to 9–10%, but watch for haze.
More scratch resistance? → Add micronized polypropylene wax or silica-wax blends.
For better clarity? → Use fumed silica or surface-treated silica at smaller particle size (~3–5 µm).
Water white finish? → Choose low-yellowing alkyds and melamine resins.
For further details contact Dr E. Ramanathan, WhatsApp 9444929163, email: eramanath@gmail.com
