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New Product Recommendation: UV-Heat Dual-Cure Resin B-6210

Release time:

2025-03-25 11:00

New Product Recommendation: UV-Heat Dual-Cure Resin B-6210

Keywords

UV-thermal dual-curing system, excellent chemical resistance, low viscosity.

Introduction

B-6210 is a polyurethane acrylate that can be combined with isocyanates to form functional coatings via a UV-thermal dual-curing process. This resin features low viscosity, high curing speed, and produces cured coatings that are both hard and tough, with excellent chemical resistance as well as outstanding weathering performance—including resistance to high- and low-temperature cycling/impact and salt spray exposure.

Basic parameters

Project	Indicator	Detection method
Appearance	Transparent liquid	Visually
Color (APHA)	≤100	GB/T 3143-1982 (Platinum-Cobalt Method)
Viscosity (cps/25℃)	3000-7000	GB/T 2794-2013
Acid value (mg KOH/g)	≤8.0	GB/T 6743-2008
Hydroxyl value (mg KOH/g)	70-120	GB/T 7193-2008
Specific gravity (g/cm³)	1.11 ± 0.02	GB/T 6750-2007
Refractive index (25℃)	1.476 ± 0.005	GB/T 614-2006
Functionality	3.5	Theoretical value
Active ingredient (%)	100	Theoretical value

Basic Performance Testing

Manufacturer	Curing speed	Pencil hardness	Glossiness	Flexibility	Yellowing: 300 mJ/cm² * 1 time	Yellowing: 300 mJ/cm² × 10 times
B-6210	300 mJ/cm²	B	92.4°	OK	Δb: 0.55, ΔE: 0.70	Δb: 2.25, ΔE: 2.71
Commercially available similar products	300 mJ/cm²	B	92.5°	OK	Δb: 0.56, ΔE: 0.73	Δb: 2.21, ΔE: 2.75

Note:

1. Test formulation: Resin B-6210 : Photoinitiator 1173 = 95 : 5;

2. Compared with similar commercially available products, this product exhibits comparable curing speed, pencil hardness, glossiness, and yellowing resistance, meeting the product’s requirements.

Specific application examples

Take the dual-cure performance test on automotive interior parts as an example:

Component A:

Resin B-6210: S-2180 = 40:60;

Group B:

HDI trimer: S-2180 = 50:50;

(Group S-2180 consists of EAC:BAC:anti-fouling agent = 70:25:5);

Component A: Component B: 1173 = 100:20:3. After thorough mixing and homogenization, first cure under a mercury lamp, then complete the curing process by thermal curing at 80℃ before conducting the test.

	Project	B-6210	Commercially available similar products
Room temperature	Curing speed (200 mJ/cm²)	Slightly sticky to the touch	Slightly sticky to the touch
	Place for 30 min	Practical action	Practical action
	Pencil hardness after 12 hours of standing	B	B
	Glossiness°	OK	OK
80℃	Place for 30 min	Practical action	Practical action
	Pencil hardness after 12 hours of standing	B	B
	Flexibility	OK	OK

Summary: Compared with similar commercially available products, our product exhibits comparable performance in terms of curing, pencil hardness, glossiness, and flexibility, meeting the product’s requirements.

Dual-cure applications for automotive interior parts and recommended formulations

1. Test formula

Component A:

Raw materials	Proportion	Note
BYK-UV-3500	0.3	Additive
1173	2.5	Photoinitiator
TPO	0.2	Photoinitiator
S-2180	32	Mixed solvent
TMPTA	3	UV monomer
DPHA	2	UV monomer
B-368	5	Tri-Official Polyurethane Acrylate
Acrylic resin	10	Thermoplastic Acrylate
B-609	15	Six-Component Polyurethane Acrylate
B-6210	30	Photothermal Dual-Curing Resin

Component B: HDI trimer, 20%;

Component C: S-2180, 40–60%; (The S-2180 component consists of EAC:BAC:anti-whitening agent = 70:25:5);

2. Testing Method

A:B:C = 10:2:4–6 (the solid content during construction shall be controlled according to the film thickness requirements); use a 400-mesh filter cloth for filtration.

Spray the material onto the substrate, achieving a film thickness of 25–45 μm. Then, bake it at 70–80℃ for 3–5 minutes. Cure it using UV energy greater than 800 mJ. Tests were conducted by spraying on both black PU primer and PC boards.

3. Test Results

Hardness ≥ H; boiled in water at 100℃ for 2 hours: OK; surface appearance: OK.

Summary: B-6210 is a UV-thermally curable resin containing hydroxyl-acrylate bonds (non-blend, synthetic type). It features low viscosity, high curing speed, excellent pigment wetting, high hardness and toughness, and superior chemical resistance. Additionally, it exhibits outstanding performance in environmental testing, such as boiling water and salt spray tests.

Application Scenario Recommendations

Recommended for use in automotive interior parts, dual-cure resins, nail tips, and other fields such as inkjet applications—areas that demand high solids content (fast curing) and low viscosity from resins.

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