BASF launched a cost-effective hydrophobically modified alkali-swellable rheological additive that partially replaces cellulose

BASF launched a new generation of hydrophobically modified alkali-swellable rheology modifier, Rheovis® HS 1181
AM, a high-performance additive suitable for water-based systems, has many characteristics such as high thickening efficiency, good scrub resistance, good storage stability, and splash resistance, and its price is lower than that of cellulose thickeners. Partial replacement of cellulose thickener in paint formulations makes paint formulations more cost-effective.

Rheological additives play an important role in coatings, which can improve the properties of coatings such as anti-settling, anti-sagging, and anti-splashing, and have an important impact on the production, storage, construction and coating performance of coatings. At present, the rheological 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 less expensive, but have slightly lower performance in terms of storage stability and scrub resistance.

Product Features

Rheovis® HS 1181
AM is a brand-new hydrophobic modified alkali-swellable rheology additive. Compared with similar products on the market, its performance has been significantly improved, and it has the ability to partially replace cellulose thickeners. It is widely applicable to a variety of water-based systems, especially recommended Wall deodorant paint system and waterproof paint system.

Application example

1. Excellent emulsion thickening ability

From the rheological curve of the emulsion, it can be seen that the thickening efficiency of Rheovis® HS 1181 AM on the low shear and medium shear of the emulsion is higher than that of competing rheological additives.

2. Excellent coatingThickening response and storage stability

In the paint experiment, three thickener ratio formulations were designed: pure HEC thickener formulation (F1), competing product HASE thickener / HEC thickener formulation (F2), Rheovis® HS 1181 AM
/ HEC thickener formulation (F3).

With the initial KU viscosity of the paint at 95 as the target, the dosage of the three formulation thickeners was 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 test coatings of the three formulations.

It can be seen from the chart that Rheovis® HS 1181 AM / HEC thickener formula (F3) is compared with pure HEC thickener formula (F1) and competitor 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 standard of building painted interior walls, the scrub resistance of paint is a very important indicator. Use a 100um wire rod to spread the paint side by side on the test cement board, according to 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 pure HEC formula (F1) in the splash resistance test, and the competitor HASE /
The HEC thickener formulation (F2) performed comparable.

5. Paint opening time

The opening time of architectural coatings is also an important indicator in construction. HEC thickener has good water retention, which can make the coating 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 HEC thickener formula is close to that of pure HEC thickener formula, and is better than that of competing HASE thickener formula.

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

Through the previous test, 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), Rheovis® HS 1181 AM has the potential to reduce the overall cost of coatings under the condition of similar performance.

Summary

In summary, Rheovis® HS 1181
AM is a high-efficiency hydrophobic modified alkali-swellable rheology additive, which has many characteristics such as high-efficiency thickening, excellent water resistance, good water retention and splash resistance, and can partially replace HEC cellulose thickener in coatings , Alkali-swellable (ASE) or hydrophobically modified alkali-swellable (HASE) thickener. Choose Rheovis®
HS 1181 AM, let you no longer worry about the performance and cost of coatings.