Abstract: Nitrogen-containing copolymers useful as viscosity index improvers with dispersing characteristics are prepared by the reaction of lithiated hydrogenated conjugated diene-monovinylarene copolymers with substituted aminolactams.

Abstract: Orthoesters are used to couple living homopolymers of monovinylarenes.

Abstract: Orthoesters are used to couple living homopolymers of monovinylarenes, and living copolymers of monovinylarenes and conjugated dienes. Novel coupled polymers are thereby produced.

Abstract: Carburetor detergency properties of hydrocarbon fuels are provided by nitrogen-containing organic compound-grafted, hydrogenated conjugated diene-monovinylarene copolymers.

Abstract: Polyalkoxy monovinyl substituted aromatic compounds, such as 3,4-dimethoxystyrene, function as both comonomer and randomizing agent in organolithium initiated copolymerization of a conjugated diene with a monovinyl aromatic compound, such as of butadiene with styrene. The resultant polymeric product exhibits lower levels of block styrene than does a corresponding copolymer made in the absence of the dimethoxystyrene.

Abstract: Nitrogen-containing copolymers are prepared by the reaction of lithiated hydrogenated conjugated diene-monovinylarene copolymers with nitrogen-containing organic compounds. The nitrogen-containing copolymers are oil additives which combine the aspects of viscosity index improvers with dispersant properties.

Abstract: Alkali metal-terminated polymers of one or more alkadienes and of one or more vinyl-substituted aromatic monomers are effectively coupled by trichloro-, tribromo- or triiodo-s-triazine.

Abstract: Lithium-initiated polymers are coupled with a vinylhalomethylarene such as vinylbenzyl chloride. Maximum molecular weight is obtained at about one mol of coupling agent for two mols of polymerlithium, indicating a major amount of the coupling to be in the form of about two polymerlithium entities being joined to one coupling agent. Excellent stability indicates little formation of branched polymer through carbon-lithium bonding. Consequently, the coupled polymer can be hydrogenated successfully to give a high molecular weight ozone-stable product.

Abstract: Treating a silicon-coupled or germanium-coupled conjugated diene polymer with a hydrocarbonlithium, -sodium, -potassium, -calcium, -magnesium, -zinc or -aluminum compound after the coupling step and prior to hydrogenation.

Abstract: A polymerization process for preparing homopolymers of conjugated dienes having decreased cis-content resulting from the use of organolithium compounds as initiators wherein 1,2-dialkoxybenzene is introduced in a quantity sufficient to decrease the cis-content of the homopolymers formed.

Abstract: Polyalkoxy monovinyl substituted aromatic compounds, such as 3,4-dimethoxystyrene, function as both comonomer and randomizing agent in organolithium initiated copolymerization of a conjugated diene with a monovinyl aromatic compound, such as of butadiene with styrene. The resultant polymeric product exhibits lower levels of block styrene than does a corresponding copolymer made in the absence of the dimethoxystyrene.