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Saturday, September 28, 2019

Novel Lacquer Containing (+)-Limonene

 A lacquer  can be a protective coating consisting of a resin, cellulose ester, or both, dissolved in a volatile solvent, sometimes with pigment added.

( I am developing a novel lacquer which contains a cellulose ester dissolved in a relatively non-volatile  solvent ( +-limonene) along with water present. +- Limonene has been used in related paint firmulations where it has been substituted for turpentine.

Pressure Relief Valve. Graphic Art

Friday, September 27, 2019

A Renewable Emulsified Paint Formulation

A solution of cellulose acetate-butyrate is prepared in limonene (oil of lemon) at 75-95 Deg. C.

The solution is poured into an aqueous solution of gelatine (equal volume) also at 75 degC.
Rapid stirring is need to form a stable emulsion.

I am currently optimizing this emulsion formulation.

A 1:1 solution of a commericial oil-based paint is stirred with the emulsion ( room temperature) for 2-3 minutes  to form a uniform blend.

It was applied to cardstock and dried in 15-30 minutes at 20 Deg C.

Chitosan ( from crustacean chitin) can be added for bulk or impasto effect.

The paint dries to a hard surface and is impervious to water.

This lacquer is prepared from all bio-resource materials and contains no acrylics.
We will upload detail experimental procedure.

We place this in the public domain for artists and chemists to consider , but please cite our website!

Left: green paint formulation applied to cardstock 10-15 minutes before image captured.
Right: some chitosan added for bulk or more for impasto effect, if desired.