Content - Brightener/Stabilizer Blend


Light and / or heat induced oxidation processes, involving a complex radical formation mechanism, activate aging and destructive processes, in particular in open-pored and fine-pored structures such as soft polyurethane foams. This results in yellowing, scorching or other material damages.

Our ISOPUR optical brightener stabilizer blend anti-scorching and anti-yellowing is a specially developed product for the extremely high requirements of soft polyurethane foams, and helps to optimize the photostability and thermostability significantly.

Damaging high-energy UV radiation is effectively filtered out. The optimally coordinated, synergetic blend also provides excellent protection against thermal stress. Thermally induced degradation during the manufacturing (scorching*) and processing phases (e.g. thermofoaming*) are effectively prevented.

In its optimum dosage, the blend satisfies even the most extreme demands and acts effectively against scorching. We recommend adding 3 % of the blend to the A component of your PU system.

An optical brightener component rounds off the range of efficacies, and produces a “super whitening effect”, a visually appealing and intensive (bluish) white.


  • Reduction of short- to medium-term yellowing of foams, e.g. from the production to sale of the finished product (approx. 4–6 weeks)

  • Foams for the textile industry (e.g. bra cups or shoulder pads), which are shaped in the thermofoaming process after production

  • Foams with a strong tendency towards scorching, e.g. in countries with hot climatic conditions and high air humidity, as well as for special foams with low density, high water content or flame-retardant systems

  • Foams in which a special “super whitening effect” is desired


  • Universally applicable, in polyether and polyester block foams

  • Our product is liquid and therefore easy to handle and dose

  • Low-fogging

  • Scorching is minimized (extent depending on dosage) during the manufacturing process

  • Yellowing resulting from the thermofoaming process is minimized (extent depending on dosage)

  • The already incorporated optical brightener provides an additional “super whitening effect”

  • Special product with a broad range of applications


On request, our ISOPUR additive blend "antiscorch and antiyellowing" is also available without the brightener component.


* Scorching is the term for the brown discoloration of the foam core, resulting from exothermal reactions that lead to heat buildup in large foam blocks during the manufacturing process.

* Thermofoaming process: Foam pressing at 160–180 °C for approximately 4–6 minutes in a metallic mould.




Individual advice

Our colours and lacquers can be used in versatile applications. We are at your disposal with an individual advice for your special requirement.

We are looking forward to your contact!