Lanxess: Water-based dispersions for PU systems

On 16 April 2021, Lanxess announced that it has expanded its Trixene Aqua range of water-based blocked isocyanate dispersions. The product family now includes new grades, specifically designed to expand the application areas and meet more demanding customer needs.

Trixene Aqua BI 120 expands the good performance as adhesion promoter of Aqua BI 220, enabling formulators to use it in a wide pH range and further enhancing soft handle. This is beneficial in textile processing where the products can be used e.g. for hydrophobic resins applied in the water proof treatment, for breathable fabrics, and for silk screen printing to improve the prints’ resistance to wash cycles.

As a non-ionic product, Trixene Aqua BI 522 is designed to achieve harder coatings, with superior chemical resistance and good drying characteristics. It is applied to metal and glass surfaces. Glasses, for example, are given very good durability by this coating agent.

Trixene Aqua BI 202 is born by Lanxess’ continuous focus on fibre sizing technologies, whereas the formulator can benefit from its combination with Witcobond polyurethane dispersions. According to the company, the use of Aqua BI 202 can improve strength of the chopped glass strands and impart composites higher mechanical, flexural properties, as well as improve impact resistance. Glass fibres are used for the formulation of high performance engineering plastics, e.g. polyamide- and PBT-based composites.

The use of Trixene Aqua BI 202 can improve the strength of glass strands and impart composites higher mechanical, flexural properties, as well as improve impact resistance. (Source: Lanxess)

The Trixene Aqua products are said to be very good crosslinkers and adhesion promoters for aqueous coatings systems. They are said to boost the chemical and mechanical resistance of coatings and sizing formulations to allow better performance and durability in the final application. Due to the blocked isocyanate group they are more stable than the respective free counterparts and can easily be formulated in 1-K and 2-K systems together with a variety of complementary aqueous resins, e.g. hydroxy-functional acrylics, polyesters and urethanes, said the company.

Lanxess said its recent studies disclose formulation principles, preliminary selection of appropriate building blocks, ratio and curing conditions. The selection criteria are based upon a preliminary evaluation of the coatings properties, and help the formulator to commence work with Trixene Aqua BI crosslinkers.

https://ure.lanxess.com