Process for the manufacture of elastic articles from poly(monovinylaromatic/conjugated diene) block copolymers and elastic articles obtainable therewith
AssigneeShell Oil Company
InventorsJohn I. R. Rosenqvist, Teunis Graafland, Hans F. Vermeire
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Abstract
A process for the manufacturing of elastic articles such as fibers, yarns, or films, from substantially pure selectively hydrogenated block copolymers, comprising at least two blocks predominantly derived from monoalkylene aromatic monomer and at least one block predominantly derived from one or more conjugated dienes and having a number average molecular weight of at least 70,000, comprising the steps of preparing a solution or a gel of said block copolymer with an apolar organic non-aromatic solvent and processing said solution or gel through a fiber forming orifice.
Claims11
A process for the manufacturing of elastic articles, comprising the steps of:
- preparing a solution or a gel of an apolar organic non-aromatic solvent selected from non-substituted cycloalkanes or cycloalkenes having 5 to 20 carbon atoms or mixtures thereof and a substantially pure selectively hydrogenated block copolymer, the block copolymer comprising at least two blocks predominantly derived from monoalkylene aromatic monomer selected from styrene, alphamethylstyrene, tert.-butylstyrene, 4-propylstyrene, paramethylstyrene, other ring alkylated styrenes, 1-vinylnaphthalene, 2-vinylnaphthalene or mixtures thereof, at least one block predominantly derived from one or more conjugated dienes selected from 1,3-butadiene, 2-methyl-1,3-butadiene(isoprene). 2,3-dimethyl-1,3-butadiene, 1,3-pentadiene, 1,3-hexadiene, or mixtures thereof, and a total number average molecular weight of at least 70,000;
- and
- processing the solution or gel through a fiber forming orifice.
Dependencies are inferred from the claim text.