Reversible Cross-Linking System for Polyvinylamines

Simple SummaryContent extracted from patent full text and abstract with AI.

This invention relates to a reversible cross-linking system for polyvinylamine-based polymers, which use innovative piperidone-based cross-linkers to form stable, yet reversible, hydrogels and networks. The key feature is the ability to easily control the cross-linking and de-cross-linking of polymers by adjusting pH or temperature, allowing these materials to be formed or dissolved on demand. This system is especially useful in water-based applications and enables dynamic and recyclable materials with robust mechanical properties.

Use CasesContent extracted from patent full text and abstract with AI.

• Paper manufacturing as a dry-strength additive to improve paper strength while preserving recyclability and repulpability.
• Formulation of self-healing materials and coatings, benefiting from reversible network formation.
• Development of recyclable thermoset plastics that can be reprocessed or reworked by simple pH or temperature changes.
• Drug delivery systems where triggered (pH or temperature) breakdown or reformation of hydrogels is desirable for controlled release.
• Encapsulation and release systems for chemicals, dyes, or biological agents.
• Use as thickeners or rheological additives in paints, coatings, adhesives, or water-based dispersions.
• Manufacture of dynamic, re-workable adhesives and glues.
• Production of water-soluble polymer networks for biomedical or tissue engineering applications.

BenefitsContent extracted from patent full text and abstract with AI.

• Reversible cross-linking enables recycling, reprocessing, or repulping of materials (e.g., paper and plastics).
• Enhanced mechanical and dry strength properties in end products such as packaging or specialty papers, even when using lower quality or recycled raw materials.
• Reduced toxicity compared to traditional aldehyde-based cross-linkers (e.g., formaldehyde), using safer ketone-based chemistry.
• Fast and efficient gelation or cross-linking in water at room temperature, enabling simple processing methods.
• Adjustable and tunable cross-linking conditions (pH or temperature), providing flexibility for various industrial processes.
• Supports the development of self-healing or reconfigurable materials for advanced applications.
• Yields hydrogels with strong elastic and mechanical properties, suitable for demanding environments.
• Applicable in a wide range of fields such as papermaking, coatings, adhesives, biomedical devices, and sustainable or circular material solutions.

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Patent Abstract

A vinyl amine containing polymer comprises randomly distributed repeating monomer units having at least two of the following formulae:wherein, R1 is a hydrogen atom or a methyl group; andwherein the vinyl amine containing polymer comprises repeating monomer unit III and/or IV in a total amount of from about 1.5 weight percent to about 8 weight percent based on a total weight of the polymer.