Why Choose When You Can Have It All! Eversorb 673N - Complete Anti-Yellowing Solution for PU

Polyurethane (PU): A Key Material in Modern Industry

Polyurethane (PU) is a versatile polymer that combines elasticity, abrasion resistance, and design flexibility, making it widely applicable across industrial and consumer products. Its advantages lie in the ability to adjust hardness, flexibility, and transparency according to requirements, meeting diverse needs from high-strength structural components to soft, comfortable materials. In footwear, PU is used for midsoles, insoles, adhesives, and upper materials, balancing lightweight properties with durability. In textiles, PU synthetic leather and PU/TPU fibers not only enhance wear resistance but also provide comfortable touch and fashionable appearance. Additionally, PU is extensively used in foam, adhesives, coatings, and sealants, playing crucial roles in furniture, automotive interiors, construction, and electronics. With its multifunctionality and processing flexibility, polyurethane has become an indispensable key material in modern industry and daily life.

PU is widely used in foam, adhesives, coatings, and sealants, playing important roles in furniture, automotive interiors, construction, and electronics.

(Image source: vecteezy)

PU commonly encounters "yellowing" issues in practical use. Due to sensitivity to UV radiation, heat, oxygen, and chemical substances, materials tend to gradually change from transparent or light colors to yellowish-brown after prolonged exposure or use, affecting appearance and quality. Imagine: white sneaker soles yellowing within six months, transparent phone cases turning foggy yellow after three months, pristine sofas gradually losing their luster... These are real-world examples of PU yellowing problems in daily life.

Beyond light and heat, nitrogen oxides (NOx) in the air are also significant factors causing pollution-induced yellowing of PU, especially severe in densely trafficked or urban environments. For PU foam, exposure to high temperatures during processing or use can lead to core scorching or brown spots, not only affecting appearance but also damaging consumer trust in brand quality! While these issues typically don't immediately compromise material structure, they directly reduce product value perception and market competitiveness.

Innovative Solution: All-in-One Comprehensive Protection

Eversorb® 673N: Revolutionary Product with Multiple Protection in One Solution

Eversorb® 673N is specifically developed for PU/TPU applications with multiple protection performance. It is phenol-free, compliant with RSL and SVHC standards, and environmentally safe. The product appears as a pale yellow transparent liquid that doesn't affect the initial color of PU products. It's suitable for diverse applications including footwear, textiles, foam, and adhesives, effectively improving weatherability and appearance stability.

Key Performance Features

1 Excellent Weatherability Protection for PU

Eversorb® 673N's unique formulation provides superior UV resistance, effectively reducing yellowing risks during processing and use, significantly improving product weatherability and appearance retention.

ℹ Metal Halide Lamp (300W) at 50°C for 24 Hours Test Verification:

✓ 95% Reduction in Color Difference (ΔE): Decreased from 12.3 to 0.6, significantly suppressing yellowing

✓ Gray Scale Rating of 4.5: Exceeds international brand weatherability standards (≥4), no yellowing, no fading

(Test conditions: PU insole, polyether MDI AB system, 2% dosage, 24-hour test duration)

⭐ Breakthrough Performance: Gray Scale 4.5 — Exceeding Strict Brand Weatherability Standards ⭐

2 Effective Prevention of PU Foam Scorching

Eversorb® 673N effectively suppresses core scorching and burnt spots caused by high temperature and oxidation, maintaining clean PU appearance and quality. Especially suitable for long-term use products such as mattresses, sofas, and home furnishings.

ℹ Microwave (800W) Heating for 40 Seconds High-Temperature Test:

✓ Clean White Foam Cross-Section: Completely no core scorching phenomenon

✓ Severe Scorching in Untreated Samples: Dark brown spots appearing in the center

(Test conditions: Polyurethane flexible foam, polyether TDI system, 2% dosage, 40-second test duration)

3 Exceptional NOx Resistance

Eversorb® 673N significantly reduces pollution-induced discoloration caused by nitrogen oxides. Particularly suitable for products exposed to outdoor environments such as footwear, architectural membrane materials, and textile fabrics.

ℹ AATCC 23 Nitrogen Oxide Exposure for 6 Hours Test:

✓ 63% Reduction in Color Difference (ΔE): Decreased from 7.9 to 2.9, far superior to commercial products (7.1)

✓ Clean White Appearance Maintained: Effectively suppresses NOx pollution-induced yellowing

(Test conditions: Polyurethane flexible foam, polyether TDI system, 2% dosage, 6-hour test duration)

Comprehensive Applications: Complete Protection from Footwear to Building Materials

Eversorb® 673N is suitable for various PU/TPU application scenarios, providing comprehensive anti-yellowing protection across different industries. From consumer products to industrial materials, from indoor applications to outdoor environments, it delivers stable and reliable protective performance:

Complete Protection in One Solution, Achieving Sustainable Product Value

"Eversorb® 673N - Comprehensive Anti-Yellowing Solution for Polyurethane" integrates UV resistance, heat resistance, anti-scorching, and NOx resistance functions through innovative formulation design, thoroughly resolving yellowing issues during PU/TPU processing and use. Compared to traditional multi-additive combinations, Eversorb® 673N not only simplifies formulation design and management but also avoids compatibility issues, ensuring long-term stability. With environmental safety and multiple protection capabilities, it provides comprehensive protection for diverse applications including PU footwear, textiles, foam, adhesives, and elastomers, enhancing brand market competitiveness and product value.

Eversorb® 673N provides comprehensive protection for PU materials, helping brands enhance market competitiveness and product value.

(Image source: vecteezy)