Very fine stable dispersions of block copolymers
AssigneeShell Oil Company
InventorsJeffrey G. Southwick, David M. Austgen, Jr.
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Abstract
A stable polymer dispersion having an average particle size of no more than 1 micron comprising water, a surfactant and a polymer comprising at least one conjugated diolefin block and/or vinyl aromatic hydrocarbon block and at least one acrylic monomer block with the structure ##STR1## wherein R.sub.1 is selected from the group consisting of hydrogen, phenyl and alkyl radicals which are linear or branched and contain from 1 to 10 carbon atoms, and R.sub.2 is a cyclic or non-cyclic alkyl radical which is branched at the first carbon atom, contains from 1 to 14 carbon atoms and may contain a tertiary amine or an ether linkage.
Claims6
A stable polymer dispersion having an average particle size of no more than 1 micron comprising water, a surfactant and a block copolymer having a molecular weight of at least 1,000 comprising at least one polymer block formed of a conjugated diene and/or a vinyl aromatic hydrocarbon and at least one acrylic monomer block with the structure ##STR4## wherein R.sub.1 is selected from the group consisting of hydrogen, phenyl and alkyl radicals which are linear or branched and contain from 1 to 10 carbon atoms, and R.sub.2 is a cyclic or non-cyclic alkyl radical which is branched at the first carbon atom, contains from 1 to 14 carbon atoms and may contain a tertiary amine or an ether linkage.
Dependencies are inferred from the claim text.