Union Carbide Corporation

Union Carbide Chemicals and Plastics Company, Inc.

Debra J Meschke

Kenneth L Hoy

Louis F Theiling, Jr

Capped connected branch copolymers are provided comprising a core segment, branched polymer segments attached to the core segment, linear polymer segments attached to the terminals of the branched polymer segments, and cap segments, which comprise residues of an alkylene oxide containing at least 4 carbon atoms and which are attached to the free terminals of the linear polymer segments. These capped copolymers are less water-soluble than the uncapped connected branched copolymers from which they are derived, and are useful in carbonless copying systems as carriers for the color precursor microcapsules. The microcapsules can be applied to the carbonless copying sheet by dispersing the microcapsules in the capped copolymer, heating the copolymer above its transition temperature and spreading the melted copolymer over the sheet. After cooling, the copolymer forms a coherent layer on the sheet. Since no water is required for application of the copolymer, the curling and wrinkling problems encountered when using aqueous dispersions of the microcapsules are avoided.

Connected branch copolymers, methods for their production, and copying

Lubricant compositions having good dilution viscosity characteristics and high viscosity/pressure coefficients can be produced using a connected branch copolymer having a core segment, non-crosslinked branched polymer segments connected to the core segment and a group of linear polymer segments connected to the branched polymer segments and bearing terminal groups capable of effecting hydrogen bonding. These connected branch copolymers are used in aqueous lubricant compositions, which may include a co-solvent such as ethylene or diethylene glycol.

Lubrication method and compositions for use therein

Ceramic compositions comprising a ceramic material such as alumina, clay, a dispersant and a polymeric binder are prepared using as the polymeric binder a connected branch copolymer comprising a core segment, non-crosslinked branched polymer segments attached to the core segment and linear polymer segments connected to the branched polymer segments and bearing terminal groups capable of effecting hydrogen bonding. By using this form of polymeric binder, polymers of relatively high molecular weight can be used, thereby giving good green strength in the greenware, while still keeping the slurry viscosity relatively low.

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Valley Cottage, NY, United States of America

Debra J Meschke