In the chemical industry, the anti-yellowing performance of the transparent coating of products such as paints, inks, adhesives and nail polish is the core indicator that determines the durability of the product appearance. Long-term exposure to ultraviolet rays, oxygen and pollutants will easily cause oxidation reactions in polymer materials, resulting in yellowing of the coating and loss of gloss, which seriously affects the appearance and service life of the product. As an industry-leading solution, thiol anti-yellowing additives have become a key technology to improve the weather resistance of coatings due to their unique chemical mechanism, and the Thiol-30L product launched by Shenzhen U-Sunny has set a technical benchmark in this field.
1. Anti-yellowing mechanism of thiol
The chemical properties of thiol (-SH) group enable it to play multiple roles in the anti-yellowing process:
Antioxidant activity: By quenching free radical chain reactions, blocking the generation path of oxidation products, such as combining with peroxy radicals to form a stable structure, delaying polymer degradation.
Inhibition of enzymatic reactions: thiols can bind to zinc ions in metalloproteinases, inhibit catalytic activity, and thus slow down the aging process of materials.
Photostabilization synergistic effect: When compounded with UV absorbers (such as UV-531) and hindered amine light stabilizers (HALS), the anti-UV aging performance of the coating can be significantly improved.
2. Technical advantages and application scenarios of Thiol-30L
Thiol-30L from Shenzhen U-Sunny is a polythiol compound based on a secondary distillation process, designed for photocuring systems, with the following core advantages:
Low odor and high compatibility: Compared with traditional thiols (such as PEMP), Thiol-30L significantly reduces volatile odor by optimizing the production process, and is suitable for nail polish and interior coatings that are sensitive to odor.
Improving oxygen inhibition: Under low-energy curing conditions, its active hydrogen can react with peroxyl radicals generated by oxygen to promote chain growth reactions, ensuring that the coating cures quickly and the surface is smooth.
Broad-spectrum applicability: Suitable for UV coatings, adhesives, inks and TPU materials, especially in automotive varnishes, electronic screen protective coatings and high-end furniture UV topcoats.
3. Market competition and industry trends
The current anti-yellowing mercaptan market is dominated by international giants, such as BASF's UVINUL series and Dow Chemical's composite additives, whose products are known for their high-efficiency UV absorption capabilities. However, Thiol-30L is more competitive in terms of cost-effectiveness and sustainability through nanotechnology modification and environmentally friendly processes (compliant with REACH standards).
Future development trends include:
Multifunctional integration: combining anti-yellowing with antibacterial and self-healing functions to meet high-end needs such as automotive interiors and medical equipment coatings.
Green upgrade: Develop biodegradable mercaptan derivatives to reduce sulfur emissions during production
As consumers have increasingly higher requirements for product appearance durability, anti-yellowing thiol for clear coatings has become the focus of innovation in the chemical industry. Shenzhen U-Sunny's Thiol-30L, with its scientific formula and environmentally friendly characteristics, not only solves the yellowing problem of traditional coatings, but also provides efficient and sustainable solutions for the coatings, inks and adhesives industries. Choosing Thiol-30L means choosing the calm elegance that has been baptized by time - making each layer of coating a dual witness of technology and aesthetics.