Cross-linkable compositions based on organyloxysilane-terminated polymers

A crosslinkable mass with specific silane-terminated polymers and modifiers addresses the challenge of low modulus and recovery in sealants, achieving effective joint performance and processability without specialty materials or additives.

WO2026012761A1PCT designated stage Publication Date: 2026-01-15WACKER CHEMIE AG
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Patent Information

Application Number
PCT/EP2025/068102
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-07-09
Filing Date
2025-06-26
Publication Date
2026-01-15

AI Technical Summary

Technical Problem

Existing silane-terminated polymers used in sealants face challenges in achieving a low modulus with good recovery, leading to permanent deformation and bulging in joints due to incomplete relaxation, and existing solutions either require specialty materials, lead to substrate discoloration, or result in high viscosity and limited processability.

Method used

A crosslinkable mass comprising silane-terminated polymers with specific modifiers and organosilicon compounds, formulated to achieve low modulus and high recovery without specialty materials, using components (A), (B), and (C) in defined proportions, ensuring good processability and avoiding substrate discoloration.

Benefits of technology

The formulation allows for the production of sealants with low modulus and high recovery, maintaining good processability and avoiding substrate discoloration, using commercially available polymers without the need for special manufacturing processes or additives.

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Abstract

The invention relates to cross-linkable compositions based on organyloxysilane-terminated polymers, preferably single-component cross-linkable compositions, and to the use thereof as adhesives and sealants, in particular as low-modulus sealants.
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Citation Information

Patent Citations

  • Process for the preparation of organyloxysilylterminated polymers

    EP1535940B1

  • Hardenable composition

    EP1710280A1

  • Continuous polymer-analogous reaction of reactive silane monomers with functionalised polymers

    EP1896523B1

  • Compositions on the basis of silane-terminated polymers

    EP2470599A1

  • Cross-linkable masses based on organyl-oxysilane-terminated polymers

    EP3036266A1