BASF launches cost-effective hydrophobically modified alkali-swelling rheology additive that partially replaces cellulose

BASF launches a new generation of hydrophobically modified alkali-swellable rheology additives, Rheovis® HS 1181
AM is a high-performance additive suitable for water-based systems. It has many characteristics such as high thickening efficiency, good scrub resistance, good storage stability, anti-splash, etc., and its price is lower than that of cellulose thickeners. It can be purchased at Partially replaces cellulose thickeners in paint formulations, making paint formulations more cost-effective.

Rheological additives play an important role in coatings. They can improve the coating’s resistance to settling, sagging, and splashing, and have an important impact on the production, storage, construction, and film properties of coatings. At present, the rheology additives in coating formulations are mainly cellulose thickeners, alkali swelling thickeners and polyurethane thickeners. Cellulose thickener has good low-shear thickening ability, good water retention and excellent storage stability, but its price is relatively high; polyurethane thickener has good water resistance, but the price is also high; Alkali Swelling thickeners are cheaper, but have slightly lower performance in terms of storage stability and scrub resistance.

Product Features

Rheovis® HS 1181
AM is a new hydrophobically modified alkali-swelling rheology additive. Compared with similar products on the market, AM has significantly improved performance and has the ability to partially replace cellulose thickeners. It is widely used in a variety of water-based systems, and is especially recommended for internal use. Wall odor-reducing coating systems and waterproof coating systems.

Application examples

1. Excellent emulsion thickening ability

It can be seen from the emulsion rheology curve that the thickening efficiency of Rheovis® HS 1181 AM for low shear and medium shear emulsions is higher than that of competing rheology additives.

2. Excellent coatingThickening response and storage stability

Three thickener ratio formulas were designed in the coating experiment: pure HEC thickener formula (F1), competitive HASE thickener/HEC thickener formula (F2), Rheovis® HS 1181 AM
/ HEC Thickener Formula (F3).

With the initial KU viscosity of 95 as the target, the amounts of thickeners in the three formulas were adjusted, as shown in the table above.

The chart below shows the initial KU viscosity, 24-hour KU viscosity, 50°C/7-day KU viscosity, and 50°C/14-day KU viscosity data of the three formulations of test coatings.

As can be seen from the chart, Rheovis® HS 1181 AM/HEC thickener formulation (F3) versus pure HEC thickener formulation (F1) and competitive product HASE/
Compared with the HEC thickener formula (F2), the paint thickening response is consistent and the storage stability is close.

3. Good scrub resistance of paint

In the standards for building interior walls, the scrub resistance of paint is a very important indicator. Use a 100um wire rod to apply the paint side by side on the test cement board in accordance with the national standard GB/T
9756-2018 method maintenance and testing.

4. Anti-splash performance

Rheovis® HS 1181 AM/HEC formula (F3) is better than the pure HEC formula (F1) in the splash resistance test, and is comparable to the competitive product HASE/
HEC thickener formulation (F2) has equivalent performance.

5. Paint opening hours

The opening time of architectural coatings is also an important indicator in construction. HEC thickener has good water retention, which allows the coating to have a good opening time. And Rheovis® HS 1181
AM Due to its unique chemical structure, Rheovis® HS 1181 AM/
In the open time test, the performance of the HEC thickener formula is close to that of the pure HEC thickener formula, and is better than the competing HASE thickener formula.

The open time test method is the surface drying test method B (finger touch method) in GBT 1728-1979

Through previous tests, it can be seen that the performance of Rheovis® HS 1181 AM/HEC thickener formula (F3) is close to the standard pure HEC thickener formula (F1), slightly better than the competing product HASE/
HEC thickener formula (F2), with similar performance, Rheovis® HS 1181 AM has the potential to reduce the overall cost of coatings.

Summary

In summary, Rheovis® HS 1181
AM is a highly efficient hydrophobically modified alkali-swelling rheology additive with many features such as efficient thickening, excellent water resistance, good water retention and splash resistance. It can partially replace HEC cellulose thickeners in coatings. , alkali swelling (ASE) or hydrophobic modified alkali swelling (HASE) thickener. Choose Rheovis®
HS 1181 AM, you no longer have to worry about the performance and cost of coatings.