Since this Behr's premium transparent weatherproofing sealer is silicone fortified, you should wait at least six months prior to recoating with a 100% acrylic latex paint.
you can paint over latex paint with latex enamel.
Most paint companies make, or at least market, a DTM acrylic paint. I recommend PPG's Pitt-Tech but there are many others available at premium paint stores.
Can you restate your question are you asking what is the latex paint or are you asking when was the invention of the latex paint.
If you mean latex paint, none. Latex is a water based paint and has no toxic fumes.
Yes ,you can use polyacrylic over latex
Latex paint can stick to the floor grouting.
No. Latex paint is not affected by muriatic acid.
Primers are not water proofers, in fact primers can't be left as the finish coat because they have no durability. If the paint acts as a primer how can you expect the paint to stand up as a true finish coat.
Either oil or latex primer can be used over interior latex paint.
Names of products in paint are often changing. However, most latex paint is still water based.
You can mix water into most latex paints up to a point. Usually eight ounces to a gallon. A better alternative is to add a latex paint additive, like Flotrol, that is made out of acrylic resin, that doesn't degrade the paint.
Just paint it on if the latex is adhering well.