Silicone polyester , organo

More recent examples of this type of polymerization have involved AB2 type monomers leading to completely aromatic, polyester, organo-metallic and silicone containing hyperbranched systems. In general the final products are substantially more polydispersed than products from the controlled divergent method with branching idealities ranging from 50-75%. 

Formulations for one-shot polyether systems are similar to those used for flexible foams and contain polyether, isocyanate, catalyst, surfactant and water. Trichloroethyl phosphate is also often used as a flame retardant. As with polyesters, diphenylmethane di-isocyanate is usually preferred to TDI because of its lower volatility. Tertiary amines and organo-tin catalysts are used as with the flexible foams but not necessarily in combination. Silicone oil surfactants are again found to be good foam stabilisers. Volatile liquids such as trichlorofluoro-methane have been widely used as supplementary blowing agents and give products of low density and of very low thermal conductivity. 

Bulk properties of coatings can be modified through the introduction of various binding agents [212]. Hydrophobic properties are imparted by organo-silicon, oil-resin, and alkyd binders. Nitrocellulose, vinyl, acrylic, urea, melamine and polyester binders tend to reinforce the hydrophilic properties of the coatings. 

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