Abstract: A composition comprises a leachable organic compound distributed throughout a polymer matrix formed by reacting a fluoroepoxy compound of the formula: ##STR1## wherein x is an integer from 0 to 12, with a silicone amine curing agent of the formula: ##STR2## where n is the average degree of polymerization of the silicone amine curing agent and is 1 or greater. The leaching rate of the leachable organic compound is controlled by selecting the value of x in the fluoroepoxy compound and the value of n in the silicone amine curing agent. The composition may be used as a coating for protecting underwater substrates from fouling by marine organisms.

Abstract: Thermally stable thermosets are formed from novel linear polymer containing acetylenic units and a random distribution of organotransition metal complexes, siloxane, boron, and/or carborane-siloxane units formed by crosslinking of the linear copolymers through the acetylene units in the polymer backbone. The thermosets can be used as structural components in high temperature and oxidizing environments or as pyrolytic precursors to metal containing ceramics, ceramic films and fibers having enhanced strength and toughness with superior mechanical, optical, electrical and/or magnetic properties.