Category overview

Flexibilizers

Based on 60 products - Last update on the Jun 26, 2025

Flexibilizers are additives used to enhance the flexibility and toughness of plastic materials. These agents work by reducing the brittleness of the plastic and allowing it to deform under stress without breaking. Key features include their ability to improve impact resistance, enhance elongation, and maintain the structural integrity of the material. Flexibilizers are commonly used in applications such as adhesives, coatings, and automotive parts. 

Alternatives to flexibilizers include plasticizers and tougheners. Trends in the use of flexibilizers indicate a growing demand for high-performance and sustainable options. Sub-types of flexibilizers include epoxy-based and acrylic-based variants.

Properties

Others propertiesValue & unitTest conditiontest method
Elongation at Break (22)
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Flash Point (31)
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Tensile Strength at Break (21)
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Matrimid® 5218

by Huntsman

Matrimid® 5218 by Huntsman is a soluble thermoplastic polyimide. Acts as a flexibilizer. It is based on a proprietary diamine, 5(6)-amino-1-(4' aminophenyl)-1,3,-trimethylindane. Matrimid® 5218 is fully imidized during manufacturing, eliminating the need for high temperature processing. It offers good thermal stability, high glass transition temperature and an excellent adhesion on various substrates such as engineering plastics. Possesses an excellent chemical resistance to water, steam, brine, acids, caustic and non-polar organic solvents, unlike other polyimides. It is soluble in a variety of common solvents (i.e. CH<sub>2</sub>Cl<sub>2</sub>, CHCl<sub>3</sub>, THF, DMAC, DMF, NMP). Matrimid® 5218 has compatibility with epoxies and other chemistries. Used in film casting.

Matrimid® 9725

by Huntsman

Matrimid® 9725 by Huntsman Advanced Materials is soluble thermoplastic polyimide. It is a flexibilizer. It is a micropulverized version of Matrimid® 5218. Based on a proprietary diamine, 5(6)-amino-1-(4' aminophenyl)-1,3,-trimethylindane, it is fully imidized during manufacturing, eliminating the need for high temperature processing. Matrimid® 9725 offers high glass transition temperature and an excellent adhesion on various substrates such as engineering plastics. It exhibits an excellent chemical resistance along with very good thermal properties (Tg DMA > 300°C). It is soluble in a variety of common solvents (methylene chloride, ethylene chloride, chloroform, tetrachloroethane, THF ETC). Has compatibility with epoxies and other chemistries.

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Flexibilizers