Automotive Coatings Formulation: Chemistry, Physics und Practices



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Automotive Coatings Formulation Ulrich Poth - Chemistry, Physics und Practices (2008, Vincentz Network) - libgen.li

Characteristic values
solids (1
h
130°C) 
35.7 % 
neutralisation degree: 
43% 
particle size (average): 
125 nm 
base (FK) 
0.657 meq/g 
pH-value: 
5.4 
viscosity (DIN 3511. 4/23°C) 
15” 
acid (FK) 
0.283 meq/g 
(equivalent ISO cup) 
58”
Pre-treatment and primers


70
Table 3.4.3: Pigment paste formulation for electro deposition primer
Table 3.4.4: Composition of the dipping tank for an electro deposition primer
Table 3.4.2: Grinding resin formulation
Grinding resin
The grinding resin 
[75]
consists first of the product yielded by the reaction between 2 moles of 
the bis-glycidyl ether of bisphenol A (technical grade, epoxy equivalent mass 188 g/mol), 1 mole 
bisphenol A and 1 mole dodecylphenol, which are made to react at 130 to 150 °C in the presence 
of triphenyl phosphine as catalyst. The process solvent is butyl glycol. The second step is the 
addition of 1 mole polypropylene glycol diglycidyl ether (epoxy equivalent mass 333 g/mol). After 
addition of some more butyl glycol by way of solvent, the mixture is made to react with 0.5 moles 
N,N-dimethylaminopropylamine and 1 mole aminoethoxyethanol for two hours at 90 °C. Since 
Moles
Components
m
wt-‰
01
2.0
bisphenol A-diglycidyl ether (EW 188 g/mol)
752.0
250.7
02
1.0
dodecyl phenol
262.0
87.3
03
1.0
bisphenol A
228.0
76.0
04
butyl glycol
64.0
21.3
05
xylene
50.0
16.7
06
triphenyl phosphine
1.6
0.5
07
butyl glycol
300.0
100.0
08
1.0
polypropylene glycol diglycidyl ether
666.0
222.0
09
1.0
diethanol amine
105.0
35.0
10
0.5
N,N-dimethyl amino propyl amine
51.0
17.0
11
butyl glycol
520.0
173.5
sum
2999.6
1000.0

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