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Thinner for Acrylic Paint

06/05/2016 2:22 AM

Hello,

I am looking for the chemical composition and properties of thinners for acrylic paint.

Thanks for your answers

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#1

Re: thinner for acrylic paint

06/05/2016 2:25 AM

I just use water....do you need to add any special properties?

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#2

Re: thinner for acrylic paint

06/05/2016 4:58 AM
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#3

Re: thinner for acrylic paint

06/05/2016 6:47 AM

Acrylic paints, like vinyl paints (polyvinyl acetate) are nearly always made as emulsions in water. The polymer is present as minute droplets or particles which are kept from coalescing by the use of surface active agents (surfactants). The water is the "diluent" or "continuous phase." Once the water is allowed to evaporate, the particles coalesce to form a continuous film. The properties of the film can be modified by including other monomers in the original polymerization reaction. The art in preparing these emulsions has got the point where the solids content can be as high as 90%, yet still remain liquid.

There are also acrylic paints that are not aqueous emulsions and typically they will be dissolved in powerful organic solvents such as butyl acetate, ethyl acetate, acetone, toluene, etc. These have the advantage of better water resistance when dried, faster drying and better gloss, but of course bad for air pollution.

You should be able to test whether you acrylic paint is an aqueous emulsion or an organic solution by the "sniff test." You could also try a lighted match on a small quantity to see if it burns. Good luck.

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#4

Re: Thinner for Acrylic Paint

06/05/2016 10:51 PM

H2O

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#5
In reply to #4

Re: Thinner for Acrylic Paint

06/05/2016 11:52 PM

Dihydrogen monoxide

sounds much better.

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#8
In reply to #5

Re: Thinner for Acrylic Paint

06/06/2016 3:49 PM

Uhhh....yes, of course Mr. Spock.

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#11
In reply to #5

Re: Thinner for Acrylic Paint

06/08/2016 10:40 PM

less is more

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#6
In reply to #4

Re: Thinner for Acrylic Paint

06/06/2016 4:04 AM

I cancelled your OT point. The OP did ask for chemical composition which you provided. If you had added the word "water" and stated properties like none toxic, none volatile, cheap, freezing point 0ºC, boiling point 100ºC to provide a more complete answer I might even have given you a GA

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#7

Re: Thinner for Acrylic Paint

06/06/2016 8:09 AM

I always use Windex when I'm airbrushing Acrylic paints during my plastic modeling builds. Works extremely well during cleanup as well!

Water.

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#9

Re: Thinner for Acrylic Paint

06/07/2016 3:20 AM

Distilled or pre boiled water . if any left over and stored normal water may contain bacteria and it may smell after a while

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#10

Re: Thinner for Acrylic Paint

06/08/2016 8:30 PM

Re: #3's advice on sniff test-the organic solvents that he mentions are quite easily differentiated from water in that the human nose will be able to detect those that he noted.

If you are going to do a sniff test, sniff the CAP, not the whole container (HS Chem basic safety).

All of the solvents noted are either combustible or flammable, particularly in the vapor phase, so I would not recommend the match test.

If there are such solvents used, the labeling should note such.

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