Applications of Methylethylketoxime
(MEKO)
Example 1. MEKO-end-capped
PU Coating
1) Preparation of MEKO-end-capped
PU prepolymer solution
Formulation:
|
Parts(w/w) |
a. |
α,α,α',α'-Tetramethyl
Xylylene Diisocyanate |
259 |
b. |
Carbitol Acetate |
400 |
c. |
Trimethylolpropane |
28 |
d. |
Polybutanol |
212 |
e. |
Dibutyltin Dilaurate |
0.1 |
f. |
MEKO |
101 |
Add ingredients a,b, c,d and e into a reactor
fitted with a stirrer, heater, thermometer and gas inlet.
Heat to 80~100 while stirring under nitrogen
and keep for 3hr to allow max. PU prepolymer yield, that
is NCO% reaches 8.9%. Add MEKO (ingredient f) into
the solution and react at 60~80 for 3hr
until NCO peaks disappear by IR detection. Thus MEKO end-capped
PU prepolymer solution, with 60% of solid content, is obtained.
2) Preparation of the coating
Formulation:
g. |
MEKO end-capped PU prepolymer solution |
100 |
h. |
Carbon Black |
1 |
i. |
Titanium Dioxide |
5 |
j. |
Calcium Carbonate |
80 |
k. |
Aromatic Naphtha (bp. 100~200) |
30 |
Place the above ingredients in a mixer, and
mix thoroughly to achieve a uniform suspension.
Characteristics
and Use:
- High adhesion, impact resistance and
storage stability.
- Suitable for galvanized steel
surface, automotive, etc.
-
Recommended to apply by air
spray; bake at 120 for 15min; film thickness 20μm.
It can also be applied by brush, roller, blade and
E-coating. ple 2. Waterborne Exterior Coating
Formulation:
| Water |
8.33 |
| Soy Lecithin Emulsion (Centromix LP-1421) |
9.0 |
| Linaqua |
8.10 |
| Titanium Dioxide |
34.99 |
| Al powder or Zinc Oxide 427W |
46.7 |
| Linseed Oil |
22.46 |
| Talc |
23.75 |
| Phenyl Alkylsulfonate |
21.65 |
| Water |
8.33 |
| Linaqua |
8.10 |
| SynvarexlA-5-97 |
7.7 |
| 6% Cobalt Caprylate |
7.4 |
| 6% Magnesium Naphthenate |
7.97 |
| 24% Cobalt Naphthenate |
9.7 |
| 8% Zinc Naphthenate |
8.00 |
| MEKO |
7.65 |
| Water |
8.33 |
Disperse Centromix LP-1421 in water. Add
Linaqua slowly while stirring. Then add the next 5 ingredients
in sequence as listed above. Mill the resulting solution
to 4 Hegman (50.00 um). Add the remaining ingredients in
sequence and stir thoroughly.
Characteristics and Use:
- Exterior
masonry coating with glaze finish.
- Excellent weather
resistance.
Example 3. Solventborne Interior
Coatng
Formulation 1: Low-gloss white alkyd
coating
| Titanium Dioxide OR-540 |
34.15 |
| Calcium Carbonate |
22.57 |
| Zinc Oxide (Kaclox 515) |
46.70 |
| 5% Calcium Naphthenate |
7.90 |
| Beckosol P-470-60 Alkyd Resin |
7.73 |
| Solvent Oil (bp. 150~200) |
6.53 |
| Levelling Agent |
7.15 |
| Solvent Oil (bp. 150~200) |
6.52 |
| 6% Colbalt Naphthenate |
8.16 |
| MEKO |
7.65 |
Place the first 6 ingredients in a colloid
mill and reduce the particle size to 6 Hegman (25.00um).
Add the remaining ingredients in sequence while stirring
and mix thoroughly.
Characteristics and Use:
- Interior
wood and concrete coating.
- High wear resistance.
Formulation 2: White glossy lacquer
| Titanium Dioxide R-750 |
34.15 |
| Zinc Oxide Kadox515 |
46.70 |
| 4% Calcium Naphthenate |
7.85 |
| Thixcin |
8.51 |
| Backosol P-470-70 Alkyd Resin |
7.86 |
| Solvent Oil (bp. 150~200) |
6.52 |
| Backosol P-470-70 Alkyd Resin |
7.86 |
| Solvent Oil |
6.52 |
| 6% Colbalt Naphthenate |
7.95 |
| Violet Dispersing Agent |
8.50 |
| MEKO |
7.65 |
Place the first 6 ingredients in a colloid
mill and reduce the particle size to 6 Hegman (25.00um).
Add the remaining ingredients in sequence while stirring
and mix thoroughly.
Characteristics and Use:
- Hard
surface coating.
- High wear and aging resistance.
Example 4. White Chlorinated Rubber/Alkyd
Lacquer
Formulation:
|
I Parts (w/w) |
II Parts (w/w) |
| 5~20mpa.S Chlorinated Rubber |
- |
- |
| Medium-oil Soy Alkyd (70%) |
8.5 |
8.9 |
| Long-oil Linseed Alkyd (70%) |
30.4 |
27.0 |
| Titanium Dioxide (Rutile) |
18.4 |
19.40 |
| Cobalt Naphthenate |
0.2 |
0.2 |
| Lead Naphthenate |
0.4 |
0.4 |
| MEKO |
0.1 |
0.1 |
| Petroleum Solvent |
8.0 |
11.0 |
| Aromatic Solvent |
34.0 |
33.0 |
| Total |
100 |
100 |
Example 5. Chlorinated Rubber Road
Paint
Formulation:
|
I
Parts (w/w) |
II
Parts (w/w) |
III
Parts (w/w) |
| 20mpa.s Chlorinated Rubber |
8.6 |
6.1 |
6.5 |
| Long-oil Alkyd (60%) |
6.6 |
16.5 |
14.0 |
| Chlorinated Paraffin (70%) |
- |
- |
- |
| Chlorinated Paraffin (42%) |
6.4 |
- |
- |
| Titanium Dioxide (Rutile) |
17.1 |
17.6 |
9.6 |
| Zinc Oxide |
4.3 |
- |
- |
| Blanc Fix |
- |
14.0 |
19.2 |
| Talc |
12.0 |
14.1 |
9.6 |
| Calcium Carbonate Heavy |
10.8 |
- |
9.6 |
| Modified Bentonite |
0. 5 |
0.5 |
0.5 |
| Epichlorohydrin |
0. 3 |
0.2 |
0.5 |
| Cobalt Naphthenate |
0.1 |
0.2 |
0.1 |
| Lead Naphthenate |
0.2 |
0.4 |
0.2 |
| Butanone |
29.8 |
- |
- |
| Toluene |
- |
30.1 |
20.7 |
| Ethyl Acetate |
3.0 |
- |
- |
| MEKO |
0.3 |
0.3 |
0.3 |
| Total |
100 |
100 |
100 |
Example 6. Alkyd Lacquer
Formulation (parts w/w):
| |
Black |
Red |
Green |
Light Grey |
Sky Blue |
White |
| Alkyd (50%) |
88.3 |
79.8 |
72.3 |
70.00 |
70.25 |
66.40 |
| Carbon Black (Hard) |
2.00 |
- |
- |
- |
- |
- |
| Titanium Dioxide (Rutile) |
- |
- |
- |
19.20 |
18.80 |
25.40 |
| Lemon Yellow |
- |
- |
11.40 |
0.39 |
- |
- |
| Iron Blue |
- |
- |
2.40 |
0.20 |
1.20 |
- |
| Carbon Black (Soft) |
- |
- |
- |
0.25 |
- |
- |
| Toluidine Red |
- |
8.00 |
- |
- |
- |
- |
| French Blue |
- |
- |
- |
- |
- |
0.18 |
| Medium Chrome Yellow |
- |
- |
1.9 |
- |
- |
- |
| Lead Oxide |
0.08 |
0.1 |
0.07 |
0.07 |
0.06 |
0.07 |
| Lead Naphthenate (12%) |
1.20 |
1.5 |
1.40 |
2.00 |
2.00 |
2.00 |
| Cobalt Naphthenate (3%) |
1.2 |
0.30 |
0.40 |
0.20 |
0.60 |
0.80 |
| Manganese Naphthenate (3%) |
0.60 |
0.60 |
0.40 |
0.80 |
0.60 |
0.20 |
| Zinc Naphthenate (3%) |
0.78 |
0.80 |
1.10 |
0.94 |
0.80 |
0.80 |
| Calcium Naphthenate (2%) |
0.85 |
0.90 |
0.82 |
1.24 |
1.20 |
1.20 |
| Silicone Oil (1%) |
- |
- |
0.40 |
0.40 |
0.40 |
- |
| MEKO(50%) |
0.41 |
0.41 |
0.41 |
0.41 |
0.41 |
0.41 |
Xylene
|
|
|
|
|
|
|
| PVC, % |
2.69 |
12.4 |
9.2 |
15.9 |
14.4 |
16.4 |
|
