Abstract: The present invention relates to a silicone composition prepared by reacting a mixture of (i) a polyisobutylene compound, (ii) a polyorganosiloxane, (iii) a silicon compound, and (iv) a catalytic amount of a catalyst. The compositions of this invention are resistant to phase separation and are useful as foam control compositions in foam producing systems.

Abstract: A mixture of carbonyl iron powder and a silicone resin containing silica siloxane units and silanol groups can be stabilized for storage by mixing a stabilizing amount of an halosilane with the mixture; monochlorosilanes are preferred. The small amount of halosilane that is needed can be further reduced by vacuuming the mixture before adding the halosilane. The stabilized compositions are useful as reactive components in curable silicone mixtures.

Abstract: The present invention relates to an organopolysiloxane compound having at least one group having the formula ##STR1## wherein R.sup.3 is a divalent hydrocarbon group having from 1 to 20 carbon atoms, R.sup.5 and R.sup.6 are selected from a hydrogen atom or a group having the formula --(C.sub.n H.sub.2n+1) where n has a value from 1 to 30, R.sup.4 is selected from a hydrogen atom, an alkyl group, or an aryl group, d has a value from 0 to 150, and e has a value from 0 to 150, with the proviso that the value of d+e is greater than zero. The organopolysiloxane compounds of this invention reduce the amount of foam in hydrocarbon fuel, especially in diesel fuels and jet fuels. The organopolysiloxane compounds act as foam control agents which display consistent compatibility and miscibility with additives which are frequently present in hydrocarbon fuels.