Water-based wood paint "water and oil combination" adhesion problem analysis

Water-based wood paint in the use of the process, especially in the "water and oil combination" process, often appear adhesion problems. Mainly because
PU
or
UV
substrate is denser, and the water-based coating on the substrate affinity is insufficient, adhesion is not enough to overcome the internal energy of the coating itself, resulting in poor adhesion problems.
for this problem, most paint factories in order to meet the adhesion requirements, to avoid "hard touch", choose a softer resin
China
. In this way, although it can solve the problem of poor adhesion, but also sacrifice a lot of paint should have a lot of performance, such as hardness, scratch resistance, water resistance, iron resistance and so on ...
SV-6145
is a water-based acrylic modified polyurethane dispersion developed specifically for this problem, through its special modified structure and the introduction of special anchoring groups, so that the paint film on the hard-to-attach substrate to form a directional adsorption layer, thus ensuring the resin excellent adhesion and overall surface characteristics.Product
No.
Raw Material Name
Added
Producer
1
Water resin SV-6145
75
U.S.
2
Microbicide LX-150
0.1
U.S. Dow
3
pH
regulator SV-95
0.1
U.S.
4
18% SY-7000
4
U.S. Grace
5
thickener 10% SV-1540
5
U.S.
1
, low-speed stirring (600 ret) state, in turn, 2-5 slowly added to 1;
2, after the viscosity increased, increased to high-speed stirring (2000film additives Texanol
3
U.S. Eastman
7
film additive DPnB
3
U.S. Dow
8
substrate moisturizer SV-327
0.0. 3
U.S.
9
Desulbant SV-410
0.2
U.S.
10
Desulbant SV-425
0.3

The U.S. Suvi
1
, high-speed stirring (2000 refrilling) state, the fine stream slowly added 6-10, and continued high-speed dispersion for 15 minutes;
2, plate inspection, confirmed that there are no shrink holes, reduce the stirring speed to medium-speed stirring (2 1000
);
11 wax lotion ME39235
3
U.S. McMen
12
thickener 10% SV-1540
2
U.S.
13
deionized water
4
1
, medium speed stirring (1000 l) state to add 11;
2, with 12, 13 adjust the paint liquid to the standard viscosity.
Total
:
100
product performance
viscosity:
70-75ku/25
C
gloss: 60 degrees
47-53%
adhesion:
0
grade
hardness:
H