1. Technical principles and core characteristics
High initial tack polyurethane acrylate is a photocurable oligomer that achieves rapid bonding through molecular structure design. Its core mechanism is:
Fused ring rigid chain structure: Using large-volume fused ring structures (such as naphthalene rings and anthracene rings) as molecular skeletons, significantly reducing the volume shrinkage rate during free radical curing (<3%), avoiding bonding failure caused by interfacial stress.
Active hydrogen bonding mechanism: The active hydrogen in the imide-urea structure forms high-energy chemical bonds or hydrogen bonds with the hydroxyl/carboxyl groups on the substrate surface, which increases the peel strength by more than 40%.
Functional group synergistic effect: The diacrylate functional group constructs a three-dimensional cross-linked network, forming high cohesion at the moment of UV curing (within 3 seconds), balancing initial adhesion and long-term bonding.
,Performance breakthroughs in four major application areas
1. Coatings: long-term protection and weather resistance
Steel structure anti-corrosion: Hangzhou Bay Cross-sea Bridge uses acrylic polyurethane topcoat system, with a 10-year gloss loss rate of <10%, and maintenance cycle extended to 12 years.
Extreme environment protection: LNG tank coatings are resistant to ultra-low temperature impact of -162℃ and pass ISO 23278 cycle test.
T-7333 innovative application: Cured film transmittance >92%, color difference ΔE <1.5 after 1000 hours of QUV aging, suitable for outdoor logo yellowing resistance scenes.
2. Ink field: efficient curing and printability
Amine modification technology: EBECRYL series amine-modified polyether acrylates achieve 515cP low viscosity and high reactivity, solving the problem of oxygen inhibition.
Glass ink innovation: Polyurethane acrylate gives UV-LED ink high flexibility (elongation at break > 900%) and scratch resistance.
T-7333 compatible solution: 8000cPa·s viscosity is suitable for roller coating/spraying process, line speed reaches 25m/min, and printing efficiency is improved.
3. Adhesive field: strong bonding and durability
PET substrate bonding: optimize R value (NCO/OH=1.6) and chain extender ratio, so that the UV adhesive bonding strength reaches 4.09MPa, and the volume shrinkage rate is only 4.38%.
Electronic packaging application: Polyurethane adhesive remains flexible in -40℃ environment, and is resistant to wet and hot aging > 500 hours.
T-7333 biocompatibility: passed ISO 10993 certification, supports non-destructive peeling and repeated bonding of medical dressings, and the recycling rate is increased by 30%.
4. Pressure-sensitive adhesive field: precision bonding and reliability
Innovation of medical conductive adhesive: polyurethane acrylate as macromolecular crosslinking agent, the peeling force of PPG2000 system is increased by 300%.
Water-based environmental protection breakthrough: high initial adhesion and high temperature resistant acrylic pressure-sensitive adhesive can withstand -40℃ cold chain environment, solving the problem of residual adhesive.
T-7333 technical benchmark:
Peel strength retention rate after 72 hours 85℃/85%RH test>90%
180° peel strength of metal interface reaches 8N/cm, breaking through the bottleneck of low polarity substrate bonding
12# steel ball initial adhesion test passed in the range of 50-60 Shore A hardness (30° tilt angle)
3. Sustainable development and industry trends
Environmental upgrade: 100% effective ingredient design reduces VOC emissions, and energy consumption is reduced by 60% compared to hot melt adhesive process.
Circular economy: supports non-destructive peeling of adhesive layer, and the reuse rate of industrial protective film materials is increased by 30%.
Technology integration: Collaborative innovation with flexible electronics and new energy equipment to expand smart packaging and wearable medical scenarios.
Shenzhen U-Sunny T-7333 product advantages:
Achieve a balance between high initial adhesion and high cohesion through precise molecular weight control (3500 measured by GPC method)
Aliphatic chain segment design ensures 500-hour hydrolysis resistance, acid value ≤2mgKOH/g
Measured data in the medical/electronic field: peel strength of aluminum alloy anodized layer 8N/cm, QUV aging ΔE＜1.5