News

Knowledge

Company News

Application Mind Map

Test Report

Technical Article

Industry News

Applications of Tin-Free UV Resin

Release time:

2026-08-24 07:12

Tin‑free UV resins eliminate the health and environmental risks associated with organotin compounds by employing an alternative catalytic system, while retaining the key advantages of UV‑curable resins, such as rapid curing and low VOC emissions. In applications like coatings, adhesives, and hard plastic coatings, they offer a technological solution that balances environmental compliance with high‑performance finishing. Understanding their specific application areas helps ensure their appropriate selection in practical production settings.

I. Hard Plastic Coatings and Consumer Electronics

Tin-free UV resins hold significant application value in the field of hard plastic coatings, particularly as protective finishes for consumer electronics housings. Waterborne UV dispersions can adhere directly to a wide range of plastic substrates, forming high‑hardness, highly wear‑resistant protective layers on the surfaces of smartphones, tablets, and other consumer electronic devices. These products excel at balancing hardness and flexibility, reducing coating brittleness and minimizing the risk of cracking, while also delivering outstanding resistance to moisture, abrasion, and hot water.

High‑functionality, tin‑free polyurethane acrylates are also widely used in this field. These high‑functionality products are recommended for high‑hardness coating formulations, including hard coatings for in‑mold decoration, window films, and thin‑film coatings for flat‑panel displays, as well as automotive plastic interior components. They outperform standard products in scratch resistance and wear resistance while maintaining excellent flexibility.

II. Wood Coatings

Tin-free UV resins are also widely used in the wood coatings sector. Waterborne UV dispersions, specifically developed for wood coatings, remain non‑sticky both before curing and after water evaporation, and can be safely applied by spraying or curtain coating. They offer advantages such as low‑temperature curing and reduced energy consumption.

Some of these products feature a high bio-based content and are environmentally friendly, being tin‑free. When used to formulate white and clear wood coatings, they deliver excellent chemical and mechanical resistance while offering easy matte finishes; their high reactivity also boosts production efficiency. Aliphatic polyurethane acrylates, which are tin‑free, are well suited for UV‑curable coatings on wood flooring and wooden furniture, providing strong adhesion to wood substrates and outstanding weathering stability.

III. Universal Coatings for Plastics and Metals

For general-purpose coatings that must adhere to a variety of substrates, tin‑free UV‑curable resins offer a flexible solution. This bifunctional aliphatic polyurethane methacrylate features a low‑viscosity formulation that facilitates formulation design; it is free of harmful substances such as organotin compounds and heavy metals, and upon curing delivers excellent hardness, optical clarity, low coloration, and impact resistance, making it suitable for industrial wood applications and specialty coatings, among others.

Aromatic polyurethane acrylate oligomers are tin-free, and the cured films exhibit excellent flexibility, acceptable abrasion resistance, and strong adhesion to a wide range of substrates, making them suitable for specialty coatings, packaging coatings, and industrial wood applications. In metal and paper coatings, chlorinated polyester resins are also tin-free, offering superior printability and pigment wetting, along with excellent adhesion to metals and papers and rapid curing.

IV. Adhesives and Electronic Applications

Tin-free UV resins also offer practical value in the adhesive industry. Aliphatic polyurethane acrylate oligomers deliver excellent adhesion to a wide range of substrates, including glass, PET, metals, and polypropylene, making them well suited for high-performance pressure-sensitive adhesives and electronic applications. Their high reactivity ensures robust surface curing even in UV LED–based and low-energy curing systems.

V. Automotive Interior and Exterior Components

In the automotive sector, tin-free UV resins are used for hard coatings on both interior and exterior components. High‑functionality products are recommended for formulating hard coatings on plastic interior parts. Some formulations feature a high bio‑carbon content, delivering exceptional outdoor durability and making them ideal for high‑performance exterior finishes and concrete coatings.

VI. Environmental Advantages of Water-Based Coatings

Water-based technology represents a key application area for tin-free UV‑curable resins. These waterborne products are free of tin and VOCs, making them well suited for industrial coatings applied by spray, curtain coating, or roll coating, while delivering excellent dispersion stability and multifunctionality. Waterborne dispersions fully comply with environmental regulations and VOC emission limits, and they also offer formulators outstanding coating performance, with mature applications already established in sectors such as consumer electronics, cosmetic packaging, and automotive interiors.

VII. Conclusion

Tin-free UV resins are used in a wide range of applications, including hard coatings for consumer electronics, wood finishes, general-purpose coatings for plastics and metals, adhesives, automotive interiors, and waterborne coatings. In the field of plastic hard coatings, high‑functionality products deliver excellent scratch resistance and wear resistance; in waterborne systems, dispersion‑based formulations strike a balance between low VOC levels and superior coating performance; and from an environmental compliance standpoint, waterborne formulations eliminate the risk of VOC emissions. As environmental regulations continue to tighten and LED‑UV curing technologies gain wider adoption, the application scope of tin‑free UV resins is expected to expand further.

Disclaimer: The above content has been compiled from publicly available sources and is provided for reference only. If any infringement occurs, please contact us, and we will address it promptly.

Bossin Related Product Recommendations – Eco-Friendly
Tin-free
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-221X	Aliphatic polyurethane acrylate	Tin-free, fast-curing, and resistant to boiling water.
B-368X	Aliphatic polyurethane acrylate	Tin-free, excellent leveling, bend-resistant, and good heat resistance.
B-6211	Aliphatic polyurethane acrylate	Fast curing, high hardness, scratch-resistant, and free of organotin.
B-919BX	Aliphatic polyurethane acrylate	Tin-free, high hardness, chemically and abrasion-resistant, with excellent toughness.
Benzene-free
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-153	Modified epoxy acrylate	Good flexibility, excellent pigment wetting, and strong adhesion.
B-21	Active amine photosensitizing promoter	Low color number, benzene-free, antioxidant and polymerization inhibitor, enhances curing rate.
B-27	Active amine photosensitizing promoter	Low color number, benzene-free, low odor, antioxidant and polymerization inhibitor
B-371	Aliphatic polyurethane acrylate	Good surface drying, excellent flexibility, and excellent gloss retention.
B-574	Polyester acrylate	Benzene-free, low-odor, and VOC levels meet cigarette-packaging standards.
Low MEHQ
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-151DM	Modified epoxy acrylate	Low halogen, yellowing-resistant, excellent plating performance, and strong adhesion.
B-376	Aliphatic polyurethane acrylate	LED yellowing is minimal, and the nail polish formulation exhibits excellent stability.
BM1211 (HPMA)	Hydroxypropyl methacrylate	HEMA-free, high strength, low irritation, and excellent adhesion
Bio-based
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-106	Acrylated epoxidized soybean oil resin	The pigment exhibits excellent wettability and is biodegradable upon curing.
B-296SW	Aliphatic polyurethane acrylate	Yellowing resistance, impact resistance, bio-based content > 40%
BM3384 (3PO-GPTA)	Propylene glycol triacrylate	Good flexibility, low irritation, and excellent pigment wetting.
No TMPTA
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-151DM	Modified epoxy acrylate	Low halogen, yellowing-resistant, excellent plating performance, and strong adhesion.
B-153	Modified epoxy acrylate	Good flexibility, excellent pigment wetting, and strong adhesion.
B-162	Epoxy acrylate	Fast curing, low odor, high gloss, and high fullness.
B-166A	Modified epoxy acrylate	Good flexibility and strong adhesion
B-166A-85	Modified epoxy acrylate	Good flexibility, excellent adhesion, contains 15% HEMA.
B-166A-85P	Modified epoxy acrylate	Good flexibility, excellent adhesion, contains 15% HEMA.
B-207X	Aliphatic polyurethane acrylate	Medium molecular weight, low odor, and excellent flexibility.
B-27	Active amine photosensitizing promoter	Low color number, benzene-free, low odor, antioxidant and polymerization inhibitor
B-296	Aliphatic polyurethane acrylate	Fast curing, chemical resistance, yellowing resistance, impact resistance
B-376	Aliphatic polyurethane acrylate	LED yellowing is minimal, and the nail polish formulation exhibits excellent stability.
B-412T-6	Aliphatic polyurethane acrylate	Good toughness, free of organotin compounds, and excellent stability of the nail polish formulation.
B-546	Polyester acrylate	Good adhesion, fast curing, and excellent flexibility.
B-619W	Aliphatic polyurethane acrylate	Fast curing, high hardness, excellent toughness, wear resistance, and chemical resistance.
No HEMA
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-151DM	Modified epoxy acrylate	Low halogen, yellowing-resistant, excellent plating performance, and strong adhesion.
B-162	Epoxy acrylate	Fast curing, low odor, high gloss, and high fullness.
B-207X	Aliphatic polyurethane acrylate	Medium molecular weight, low odor, and excellent flexibility.
B-27	Active amine photosensitizing promoter	Low color number, benzene-free, low odor, antioxidant and polymerization inhibitor
B-296	Aliphatic polyurethane acrylate	Fast curing, chemical resistance, yellowing resistance, impact resistance
B-376	Aliphatic polyurethane acrylate	LED yellowing is minimal, and the nail polish formulation exhibits excellent stability.
B-412T-6	Aliphatic polyurethane acrylate	Good toughness, free of organotin compounds, and excellent stability of the nail polish formulation.

Share to:

Key points for using tin-free UV resin

Chemical properties of tin-free UV resin