FAQ: Platinum Catalyzed Silicone Inhibitors

What are inhibitors for platinum- catalyzed addition-cure silicones?

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Potential inhibitors by category with examples
Compounds containing nitrogen	Amines and amides: – Neutralizing amines – Ethanolamine, N-methylethanolamine, triethanolamine – N,N-dimethyl ethanolamine, n-butylamine, diethylamine – Triethylamine, tetramethylenediamine, cyclohexylamine – Melamine – Dimethylformamide Nitriles, cyanates, oximo, nitroso, hydrazo, azo compounds: – Adiponitrile – 2-butoxime – Alpha-nitroso-beta-naphthol Chelates: – EDTA (ethylenediaminetetraacetic acid) – NTA (nitriloacetic acid)
Compounds containing sulfur	Sulfides, thio compounds: – Dibenzyldisulfide, thioacetic acid, allylthiourea
Compounds containing Tin	Fatty acid tin salts, such as those used in tin-catalyzed silicone release coatings
Compounds containing Phosphorus	Phosphines: – Triphenylphosphine Phosphites: – Triethylphosphite
Compounds containing arsenic, antimony, selenium, tellurium	Arsines, stibenes, selenide, telluride: Triphenylarsine, triphenylstibene P-chlorophenylcarboxymethylselenide
Residual Solvent or Monomers	Chlorinated hydrocarbons that contain amine stabilizers Alcohols: – Ethanol, methanol Esters: – Ethyl acetate, vinyl acetate Compounds with unsaturated bonds:
Residual solvents that do not inhibit cure	Nonchlorinated aromatic and aliphatic solvents: – Toluene, xylene – Hexane, mineral spirits
Primers that may inhibit cure	Polyethylene that has an anti-slip, antioxidant or other additive listed previously Primers with pigments that contain compounds listed previously 100% sodium salt primers, such as sodium alginate or carboxymethylcellulose sodium salt however, if these salts are used with hydroxyethylcellulose, inhibition will not occur Clay coatings that use polyvinylacetate or acrylic latex as a binder Coatings that contain calcium carbonate Coatings composed of the following combinations: Natural rubber latex/clay; latex/ethylated starch Styrene/acrylic Polyvinylacetate; polyvinylacetate/acrylic
Primers that do not inhibit cure	Polyvinylalcohol; polyvinylalcohol/alginate Ethylcellulose; hydroxyethylcellulose/alginate; hydroxyethylcellulose/carboxymethylcellulose Clay/S.B.R. coatings