Market Background

In European market, increasing regulatory pressure and sustainability goals are driving manufacturers to re-evaluate traditional formulation practices. The use of external plasticizers in sealants and adhesives has raised concerns related to migration and regulatory compliance. As a result, European manufacturers are increasingly seeking formulation approaches that reduce reliance on plasticizers while maintaining consistent mechanical and application performance.

At the same time, European markets emphasize long-term durability and predictable behavior over the full-service life of a product. Materials that exhibit softening, migration, or performance drift over time are becoming less acceptable, particularly in specification-driven applications.

Customer & Application Scenario

The customer is a European sealant and adhesive manufacturer developing products for construction and industrial applications where long-term stability and compliance are key requirements. Typical applications include interior bonding, joint sealing, and elastic assemblies where material consistency over time is critical.

Key formulation and application requirements included:

• Elimination of external plasticizers from the formulation
• Stable mechanical properties throughout product life
• Consistent application behavior without formulation complexity
• Compatibility with existing production and processing methods

The customer aimed to simplify formulation design while improving long-term performance reliability.

Our Solution

To address these requirements, the customer adopted an STP resin blending formulation strategy based on Risun STP polymer technology, enabling the development of plasticizer-free systems without compromising application or mechanical performance.

Key technical characteristics of the solution include:

• Polymer technology: STP (Silane-Terminated Polyether) polymer designed to alter plasticizer
• Formulation approach: Polymer blending design without external plasticizers
• Mechanical stability: Stable modulus and elasticity over time
• Curing mechanism: Moisture-curing under ambient conditions
• Processing compatibility: Suitable for standard mixing and production processes

By optimizing the balance between different STP polymerresin

components, the formulation achieved the desired flexibility and processability inherently, eliminating the need for added plasticizers. This approach improved formulation robustness and long-term stability.

Customer Feedback

Following formulation validation and market introduction, the customer reported improved consistency in both application behavior and cured performance. Quality evaluations indicated reduced variability over time, particularly in elasticity and surface appearance. From a regulatory perspective, the plasticizer-free approach simplified compliance documentation and aligned well with European sustainability expectations.

The customer also noted improved formulation control and reduced sensitivity to raw material variation, supporting more stable production outcomes.

Summary

This case demonstrates how plasticizer-free STP polymer blending solutions can effectively support the performance and compliance requirements of the European market. By leveraging Risun STP polymer technology, the customer successfully developed a formulation strategy that delivers stable mechanical behavior, simplified compliance, and reliable application performance without the use of external plasticizers.