Fields of application

ACRONAL® V 275 na (soon to be discontinued; click on replacement product Acronal V 278 for more info) intended for the manufacture of water-based flooring adhesives for laying PVC floor coverings and carpets with many different backings. Such adhesives show high tack, good quick grab, heat stability, good plasticizer migration resistance, and excellent filler acceptance. ACRONAL® V 275 na can also be used for the production of dispersion-based sealants. Sealants based on ACRONAL® V 275 na show high elastic recovery and good low-temperature flexibility.

Processing

ACRONAL® V 275 na is processed together with fillers in usual mixers. Vacuum planetary mixers have proven suitable for producing sealants. In order to gain the optimal filler acceptance, the dispersion should be raised to a pH of 8 by means of a 10% sodium hydroxide solution and stabilized by means of Pigment Disperser N or similar material. ACRONAL® V 275 na exhibits self-thickening when neutralized to pH levels above approximately 7.5, resulting in potential thickener cost savings.

Conventional defoamers (e.g., Lumiten® EL) can be used for inhibiting foam formation. It is usually sufficient to add 0.05 – 0.2% of defoamer, calculated on the sealant or adhesive mix.

Adhesives and sealants based on ACRONAL® V 275 na should be blended with a preservative in order to protect them against the attack of microorganisms. The suitability of the preservative must be determined by trials and controlled at regular intervals.