10 октября, 2015 
Malyar by Roy Usher BSc & Ian Royston BSc
The main requirements of masonry paints are good water resistance, exterior durability, yellowing, dirt pick-up resistance and good adhesion to a variety of substrates.
A typical masonry paint formulation may be:
(i) Good Quality Masonry Paint
|
Revacryl 602 |
19.0 |
|
rutile titanium dioxide |
15.5 |
|
china clay |
11.6 |
|
talc |
5.0 |
|
texanol |
0.4 |
|
propylene glycol |
0.5 |
|
surfactant |
0.3 |
|
hydroxy ethyl cellulose |
0.2 |
|
biocide |
0.5 |
|
water |
47.0 |
|
Total |
100.0 |
|
Non volatile content |
52% |
|
PVC |
38% |
|
S. G. |
1.29 |
Revacryl 602 (Harlow Chemical Co.) is an EHA/MMA colloidal polymer, 49 %nvc and with a MFFT of 5°C. China Clay and talc are cheap extenders. Ratios used depend on hiding power required. Biocide is required to improve fungal resistance.
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