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Tuesday, November 20, 2018

Monday, November 19, 2018

Polymethylmethacrylate Preparation /Emulsion/ Paint Binder

A transition upon heating ( 70-75 deg.C) from milky white to almost translucent back to milky color as polymerization develops.
In formulating my 'acrylic-fresco' paint formulations , I want the correct viscosity of the polymer for my work- and consistency from batch-to-batch.

Sodium dodecyl sulfate is the surfactant used along with potassium persulfate initiator . 1-3 hrs of heating is being studied along with inclusion of selected cross-linking agents and inclusion of some other monomers (i.e. co-polymer formulations).
1.0 g SDs was used in 100 ml. water along with about 8 ml. of the methylmethacrylate. I am studying the effect of varying the amount. The 'critical mycelles concentration' is a critical variable.
Quaternary ammonium salts have not been used in many emulsions polymerizations and I want to examine this closely.

"Let's Talk Colors"/ Weblink

Sunday, November 18, 2018

Silicon Carbide/ Paint Additive/ marine Applications/ US Patent Application

French company/ 2014/ US Patent Application

Silicon carbide based industrial paints


An apparatus and associated method contemplate an industrial silicon-carbide based paint that comprises paint binder, paint solvent, paint pigment, and silicon-carbide. The silicon-carbide being in powder form having an average grain size that does not exceed 1.0 micrometers, wherein the silicon-carbide powder is essentially completely encapsulated by the paint binder when the paint binder, the paint solvent, the pigment and the silicon-carbide powder are homogeneously mixed together in the silicon-carbide based paint, wherein the paint is durable in a marine environment after the paint is cured.