Redefining UV Protection for Unsaturated Polyester Resin: Eversorb UP Series Light Stabilizers

Eversorb® UP Series light stabilizers provide innovative photo-aging protection for unsaturated polyester resin through liquid formulation technology, effectively preventing discoloration and degradation. 

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In modern industrial development, Unsaturated Polyester Resin (UPR) has become an indispensable polymer material due to its exceptional performance. However, photo-aging remains a significant challenge for these materials. This article explores the characteristics of unsaturated polyester resin, its photo-aging mechanisms, and the innovative Eversorb® UP Series light stabilizer solutions.

 

 

Value and Characteristics of Unsaturated Polyester Resin

 

Unsaturated Polyester Resin (UPR), as a multifunctional polymer material, is widely recognized in the industry for its outstanding properties:

 

• Superior mechanical strength, ensuring structural stability

• Excellent water and weather resistance, suitable for outdoor applications

• Outstanding solvent resistance, enhancing chemical stability

• Exceptional cold resistance, expanding the range of operating environments

 

These characteristics enable its powerful application potential across multiple sectors, including: handicrafts, artificial marble production, high-performance coatings, construction materials, industrial tanks, piping systems, automotive components, and wind turbine blades in the renewable energy sector.

 

 

 

 

Photo-Aging: The Invisible Threat to Unsaturated Polyester Resin

 

 

Despite its many advantages, photo-aging remains one of the biggest application challenges for unsaturated polyester resin. When UPR is exposed to natural light, especially UV radiation, a series of photochemical reactions occur:

 

• Degradation of internal chromophores

• Accelerated decomposition of unreacted residual substances

• Gradual destruction of molecular chain structures

 

Under UV exposure, it takes surprisingly little time to observe significant material surface changes, including discoloration, yellowing, significant loss of gloss, development of micro-cracks, and in severe cases, chalking!

 

 

Eversorb®  UP Series: Innovative Photo-Aging Protection Technology

 

To effectively address photo-aging issues, the next-generation Eversorb® UP Series light stabilizers were developed specifically for unsaturated polyester resin, featuring several technical innovations:

 

 

• Innovative liquid formulation: Unlike traditional powder light stabilizers that require heating, Eversorb® UP Series comes in liquid form. It can be directly added and mixed for quick, uniform dispersion, improving production efficiency.

   

• Color stability: While traditional powder light stabilizers often affect resin color, causing immediate yellowing of originally transparent unsaturated polyester resin, Eversorb® UP Series maintains the resin's original color upon addition.

   

• Comprehensive protection: Significantly slows down material discoloration, cracking, and chalking processes, helping maintain material gloss and structural integrity.

 

 

Precise Customization: Meeting Diverse Application Needs

 

The uniqueness of Eversorb® UP Series light stabilizers lies in their flexibility. Users can precisely adjust addition amounts based on specific product characteristics and usage environments to achieve optimal light stabilization effects.

 

 

 

 

Eversorb®  UP Series: A New Era in UPR Photo-Aging Protection

 

 

As industrial technology advances, the application of unsaturated polyester resin continues to expand across various fields, increasing the demand for photo-aging protection. With over 25 years of expertise in polymer anti-aging solutions, Evergreen Chemical has specifically developed the Eversorb® UP Series , demonstrating significant value through continuous technical innovation:

 

• Provides comprehensive photo-aging protection mechanisms, effectively extending the service life of unsaturated polyester resin

• Innovative highly compatible liquid formulation technology, significantly improving production efficiency and application convenience

• Low color impact and preservation of post-curing appearance, maintaining product application flexibility and aesthetics

 

The Eversorb® UP Series  not only solves unsaturated polyester resin's photo-aging issues but also provides new directions for industry technological upgrades. Through continuous R&D innovation and application optimization, Eversorb® UP Series  will continue to provide more complete photo-aging protection solutions for the unsaturated polyester resin industry, driving the sector toward higher quality development milestones.