Talk about the application of thickener in water-like paint

The application of thickener
the application of thickener from the perspective of different systems.
varnish
in the varnish system, the formula structure is relatively simple, generally choose polyurethane-type thickener. According to the requirements of construction status, plate effect, choose different shear thickener combination, can better meet most of the production requirements
China
.
conventional thickener applications are used to balance low shear
plus
medium to high shear performance against flow hooks and leveling performance. In fact, the continuous development of thickener technology today, the emergence of many different structures and characteristics of the product, we need to choose the application.
Color paint
in the paint system, generally has a higher content of pigment fillers, the content is relatively complex, in addition to the need to consider anti-sinking, anti-water layering, single-use polyurethane-type thickeners easy to produce water and subside, even with the application of low-cut polyurethane-type thickeners, anti-sinking effect is not satisfactory.
can be used with acrylic-alkali-soluble thickener with polyurethane-combined thickener, the former can be used to improve the anti-sinking effect. However, when applying, we should pay attention to the amount of acrylic-alkali-soluble thickener, excessive dosage can easily lead to poor leveling, gloss decline, especially in the high gloss system.
paint
in the paint system, often more concerned with the smoothness of the paint film, plate effect, gloss, permeability and so on. Polyurethane-type thickener good choice, if the anti-sinking performance is insufficient, you can add a small amount of acrylic-alkali-soluble thickener or anti-sinking additives to match.
primer
in the primer system, the classification is more complicated. Simply put, high-permeable primers generally only choose polyurethane-type thickeners, there is a certain amount of powder is best with acrylic-alkali-soluble thickeners to improve anti-sinking performance.
addition, the phenomenon of rising ribs in wood paint is mainly caused by the infiltration of water and the expansion of water absorption of wood. The application of acrylic-alkali-soluble thickener has a certain water preservation effect, the same film thickness, wetting into the hole performance is reduced, anti-rise ribs will have a certain improvement.
to use the
through
SV-150
acrylic-type alkali-soluble thickener (
HASE
), which is superior to similar products in terms of anti-rise ribs, storage and paint film status, is recommended.
wipe type
wood coating has more wipe products, such as Grace, wipe color treasure and so on. Wipe products are generally required to enter the wood eye effect and easy to collect clean, thickener selection recommended organic bentonish, cellulose or acrylic-alkali-soluble thickener, is not recommended to choose polyurethane-type thickener.
The first three are mainly thickening of the water phase, good water preservation effect, and strong false plasticity, wipe can be effective into the wood eye and avoid the whole surface dirty;
in water-based wood and water
-based metal lacquer, the requirements for flow leveling, plate effect, gloss, transparency, etc. are higher, polyurethane-combined thickeners are the largest and most widely used types.
is used in the polyurethane-combined thickener (
). HEUR
) screening, there are the following points:
1
, thickening efficiency
2
, fluid status
3
, storage stability
4
, paint film transparency
5
, flow level
and

Ant-flow hanging
6
,
shrink edge situation
7
, steady foam situation
8
,
board effect
in the above performance, most of the technical staff pay more attention to the first few, while ignoring the effect of thickener on the plate effect. It is true that thickeners have the greatest impact on the system in the first few aspects, but the plate effect is also worthy of our attention.
a period of time ago in a varnish experiment, I made the paint plate surface effect has been bad, there is similar to the situation of small moths, all aspects of the adjustment, only to find that it is the effect of thickener.
follow-up evaluation in this regard, several products of the same type
The SV-1540
best performing (see chart below), and interested friends can ask for samples backstage.
a closer look at the very small
using
SV-1540
plate effect is better
the effect of thickener on the plate surface includes, but is not limited to, the above problems.
in the face of poor flat surface, the conventional thinking is generally that low shear stick through the high cause, in fact, the application of high shear thickener will also lead to poor leveling. When the overall flow of lacquer liquid is too good, the edge drying will flow faster contraction, resulting in shrinking edges, paint film surface moisture volatility uneven formation of the surface pressure difference will also promote the flow of lacquer film, the formation of short-wave leveling is poor.
that's why different cuts at low, medium, and high levels are needed for use, and I applied the
SV-1030
polyurethane-combined thickener, in the
low medium and high shear viscosity is fully effective and more balanced, can be used alone to obtain a good flow hanging, flow leveling and shrink edge performance balance. It has the characteristics of slight denaturation effect and unstable bubble.
recommended to everyone.
adjustment of the flow state of the coating is the focus of thickener application and selection, how to ensure the balance of the coating in storage, construction and effect, which has certain requirements for formula workers.