Coating formulation kit including a catalyst solution dispenser for a hand-held liquid spraying apparatus

A kit for forming a multi-component liquid coating formulation for application using a hand-held spraying apparatus to a surface to produce a finished coating, the spraying apparatus having a housing with a flow channel extending therethrough and a reservoir, the reservoir being in fluid communication with the flow channel, the reservoir having a cross sectional area “A”, the kit comprising:

• a first container holding a first formulation and a second container holding a second formulation which, when mixed in a predetermined ratio and charged into the reservoir, form a liquid coating formulation having “W” weight percent of solids therein, and
• a catalyst solution dispenser in the form a generally tubular body member having a closure at both a first and a second end thereof, the dispenser holding a predetermined volume of a polymerization catalyst solution having “w” weight percent of catalyst therein,
• the tubular body member of the dispenser having a predetermined cross sectional area “a”, wherein the cross sectional area “a” is given by the relationship:
• a≅P·A·[W/w]·10−6,
• where P is the ratio by weight of the catalyst to the solids desired in the finished coating, in parts per million,
• so that, in use, after opening of the closure at the first end thereof, the dispenser is insertable into a liquid coating formulation in the reservoir to a position such that, after opening of the closure at the second end, the liquid head of the liquid coating formulation in the reservoir prevents flow of the catalyst solution from the dispenser until the liquid coating formulation flows from the reservoir into the flow channel,
• whereby the catalyst solution mixes with the coating formulation in a way that a predetermined concentration of the catalyst solution is maintained as the liquid coating formulation flows from the reservoir.