1.6.2
May 6, 2009
Category: General
Posted by: dtadmin
STS
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Substitution of Extenders at Constant Gloss
Past a certain level, as PVC increases gloss decreases. As extenders serve the dual function to impart specific properties to the coating AND reduce the overall cost. By substituting an extender with a lower oil absorbtion (vehicle demand) it is possible to increase the PVC while not adversely affecting gloss.
E= A1 * D2 / A2 * D1
where:
- E - Extender Substitution Factor
- A1 - Oil absorbtion of substituted extender (%)
- A2 - Oil absorbtion of substituting extender (%)
- D1 - Density of substituted extender
- D2 - Density of substituting extender
Multiply E (Extender Substitution Factor) * weight of extender to be replaced to obtaing the weight of substituting extender.
M2 = E * M1
where:
- E - Extender Substitution Factor
- M1 - Mass of substituted extender
- M2 - Mass of substituting extender
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