No Equal Justice: Race and Class in the Criminal Justice System

An organosilicon compound having attached to at least one Si atom by a Si-C linkage at least one organic radical containing at least one epoxide group, any remaining valencies being satisfied by hydrocarbon, halohydrocarbon, hydrocarbonoxy, halohydrocarbonoxy or hydroxyl radicals, or hydrogen or oxygen atoms, is made by heating a mixture of an unsaturated organic compound containing at least one epoxy group and a silicon compound containing at least one SiH group. The products are either silanes of the formul AxSiX4-x and AmRnSiX4-n-m or siloxane polymers or copolymers of the formula AmRbSiO4-m-b, wherein R is hydrogen, a hydrocarbon or halogenated hydrocarbon radical, X is a hydrocarbonoxy or hydroxyl radical, A is an epoxy or epoxidized radical, x is 1 to 4, m and n are each 1 to 3 and b is 0 to 2. The compounds may be cured by reacting them with conventional epoxide curing catalysts. In typical examples: (1) allylglycidyl ether was reacted with a mixture of tetramethyldisiloxane and toluene containing a diethyleneglycoldimethylether solution of chloroplatinic acid to yield on fractionation and and (2) vinylcyclohexenemonoepoxide was similarly reacted with [CH3.H.SiO]5 to give which cured with m-phenylenediamine into a hard, tough, heat-stable resin. Uses.-The compounds can be formed into cured mouldings, castings and films; used for coating metals and glass; used as adhesives; incorporated into epoxy, alkyd, aminoplast and polyamide resins and other siloxanes containing functional groups, these modified products being useful as lubricants, coating compositions, casting resins and paints; and can be used as intermediates in making organic-modified silicon compounds by reaction of the epoxide group, e.g. with water, HCl, HNO3, carboxylic acids, NH3 and amines, HCN, Na2SO3, phenols, Grignard reagents, alcohols, aldehydes and ketones, H2S, H3PO4 and with mercaptans, to yield respectively a glycol, a chlorohydrin, a hydroxynitrate ester, hydroxy esters, hydroxyl amine, cyanohydrins, hydroxy sodium sulphonate, hydroxy phenyl esters, hydroxy alcohols, hydroxy ethers, acetals, hydroxy thiols, hydroxy phosphate esters and hydroxy thioethers. The epoxy group may also be reduced to yield alcohols. These derivatives can be used as emulsifiers, plasticizers for organic and organosilicon resins, as lubricants, as intermediates in making organosilicon resins and as modifiers for organic resins.